This standard replaces GJB 899-1990 Reliability testing for qualification and production acceptance.
The following main changes have been made with respect to GJB 899-1990:
a) Some contents of this standard are modified according to MIL-HDBK-781A;
b) The terms are modified;
c) The contents of failure criteria and statistics principles are added;
d) The requirements of fixture measurement are added;
e) The calculation method of statistical plan is added;
f) Annex D of GJB 899-1990 is incorporated into Annex A herein;
g) Annex C is redrafted according to the requirements of pretest preparation, test operation and post-test work, with some new contents added.
Annexes A and B of this standard are normative, and Annex C is informative.
This standard was proposed by the Electronic Information Base Department of the General Armaments Department of the PLA.
GJB 899 was issued for the first time in 1990.
Reliability testing for qualification and production acceptance
1 Scope
This standard specifies the requirements of reliability testing for qualification and production acceptance (hereinafter referred to as “reliability verification test”) for systems and equipment (hereinafter referred to as “products”), and provides the statistical test plan (exponential distribution), parameter estimation, method for determining combined environmental conditions, and implementation procedure of reliability verification test.
This standard is applicable to reliability qualification test (work item 404) and reliability acceptance test (work item 405) specified in GJB 450A-2004.
The products to which this standard applies are divided into the following six categories according to their field service environment:
Category 1 Fixed-ground equipment
Category 2 Mobile ground equipment
A Wheeled vehicle
B Tracked vehicle
C Shelter configuration
D Manpack
Category 3 Shipboard equipment
A Naval surface craft (excluding speedboats)
B Naval submarine
C Landing craft and inland waterway dingey equipment
Category 4 Jet aircraft equipment
A Fixed-wing
B Vertical and short take-off and landing (V/STOL)
Category 5 Turboprop aircraft and helicopter equipment
A Turboprop aircraft
B Helicopter
Category 6 Air-launched weapons and assembled external stores and their equipment
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions, of any of these publications do not apply. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references or references with version not indicated, the latest edition of the normative document referred to applies.
GB 1920 Standard atmosphere (below 30 kilometers)
GJB 150-1986 (all parts) Environmental test methods for military equipments
GJB 450A-2004 General requirement for materiel reliability program
GJB 451A-2005 Reliability, maintainability and supportability terms
GJB 841 Failure reporting, analysis and corrective action systems
GJB 2725 General requirements for the competence of testing and calibration laboratories
GJB/Z 457-2006 General guidelines for airborne electronic equipment
HB 5652.1 Climatic extremes - Atmospheric temperature extremes
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GJB 451A-2005 and the followings apply.
3.1 demonstrated MTBF interval (θL, θU)
the probable range of true MTBF under test conditions, that is, an interval estimate of MTBF at a stated confidence level
3.2 observed MTBF (θ ̂)
the total test time of the product divided by the number of chargeable failures
3.3 lower test MTBF (θ1)
the lowest MTBF value which is acceptable. The probability of accepting equipment with a true MTBF that is not greater than the lower test MTBF (θ1) is at most 100β%. The lower test MTBF of products is equal to the lowest acceptable MTBF of products
3.4 upper test MTBF (θ0)
the probability of accepting product with a true MTBF that is not less than the upper test MTBF (θ0) is at least 100(1-a)%
3.5 predicted MTBF (θp)
the value of MTBF determined by the specified reliability prediction method
3.6 producer's risk (α)
the maximum probability that the true MTBF is determined to be less than the upper test MTBF (θ0) when the former is not less than the latter
3.7 consumer's risk (β)
the maximum probability that the true MTBF is determined to be not less than the upper test MTBF (θ0) when the true MTBF is less than the lower test MTBF (θ1)
3.8 discrimination ratio (d)
the ratio of the upper test MTBF (θ0) to the lower test MTBF (θ1)
d=θ0/θ1
4 General requirements
4.1 Selection of test sites
4.1.1 Selection of sites for reliability qualification test
The sites of reliability qualification test are selected by the following priority order and carried out under corresponding conditions upon the approval of the procuring activity:
a) The test shall be carried out in a qualified laboratory independent of the contractor whose quality system is established in accordance with GJB 2725 and passes accreditation;
b) Under the supervision of a qualified laboratory entrusted by the procuring activity, the test shall be carried out in the laboratory of the contractor.
4.1.2 Selection of sites for reliability acceptance test
The sites of reliability acceptance test are selected by the following priority order and carried out under corresponding conditions upon the approval of the procuring activity:
a) The test shall be carried out in a qualified laboratory independent of the contractor whose quality system is established in accordance with GJB 2725 and passes accreditation;
b) Under the supervision of the procuring activity, the test shall be carried out in the laboratory of the contractor.
4.2 Reliability qualification test plan, program and procedure
4.2.1 Reliability qualification test plan
The reliability qualification test plan of materiel is formulated according to the requirements of materiel. In the reliability verification test plan, the materiel reliability test work shall be comprehensively planned, providing the basis for the reliability verification test of materiel.
4.2.2 Reliability qualification test program
The reliability qualification test program is formulated according to the test plan of the materiel, or in combination with the product under test. It shall be formulated in combination with the characteristics of products, providing the basis for the reliability verification test of products.
It generally includes:
a) The selected statistical test plan (statistical plan for short), see Annex A;
b) Decision risk;
c) Combined environmental conditions;
d) Test requirements and failure criteria;
e) Other items.
Foreword VII 1 Scope 2 Normative references 3 Terms and definitions 4 General requirements 4.1 Selection of test sites 4.1.1 Selection of sites for reliability qualification test 4.1.2 Selection of sites for reliability acceptance test 4.2 Reliability qualification test plan, program and procedure 4.2.1 Reliability qualification test plan 4.2.2 Reliability qualification test program 4.2.3 Reliability verification test procedure 4.3 Combined environmental conditions 4.3.1 General 4.3.2 Sources and determination criteria of test stress 4.3.3 Principles for determining combined environmental conditions 4.4 Tolerance of combined environmental conditions 4.5 Test facilities and instrumentation 4.6 Products under test 4.8 Failure mode, effect and criticality analysis 4.9 Performance testing (including functional inspection) 4.9.1 General 4.9.2 Pretest performance testing 4.9.3 Performance testing during test 4.9.4 Post-test performance testing 4.10 Failure reporting, analysis and corrective action system (FRACAS) 4.11 Failure criteria 4.12 Failure classification 4.13 Test organization 5 Detailed requirements 5.1 Reliability verification test plan, program, procedure and its control 5.1.1 Reliability verification test plan 5.1.2 Reliability qualification test program 5.1.3 Reliability verification test procedure 5.1.4 Review of reliability verification test plan 5.1.5 Review of reliability verification test program 5.1.6 Review of reliability verification test 5.1.7 Test working group 5.1.8 Reliability verification test report 5.2 Reliability qualification test 5.2.1 Statistical plan 5.2.2 Combined environmental conditions 5.2.3 Installation and connection of product under test on test facility 5.2.4 Measurement of performance parameters 5.2.5 Failure handling 5.2.6 Failure classification 5.2.7 Total test time 5.2.8 Accept and reject decisions 5.2.9 Corrective actions 5.2.10 Preventive maintenance 5.2.11 Refurbishment 5.2.12 Requirements of data items 5.3 Reliability acceptance test 5.3.1 General 5.3.2 Combined environmental conditions 5.3.3 Installation and connection of product under test on test facilities 5.3.4 Measurement of performance parameters 5.3.5 Failure handling 5.3.6 Failure classification 5.3.7 Total test time 5.3.8 Batch acceptance 5.3.9 All-equipment test acceptance 5.3.10 Batch rejection 5.3.11 All-equipment test rejection 5.3.13 Preventive maintenance 5.3.14 Refurbishment 5.3.15 Requirements of data items 6 Instructions 6.1 Task tailoring 6.2 Matters to be specified Annex A (Normative) Statistical Plan of Reliability Verification Test and Reliability Parameter Estimation A.1 Scope A.2 Basis and classification of statistical plan A.3 Selection of statistical plans A.3.1 Selection of statistical plan categories A.3.2 Factors to be considered when selecting statistical plans A.3.3 Selection of statistical plan parameters A.3.3.1 Sample size A.3.3.2 Test time A.3.3.3 Decision-making risk A.3.3.4 Discrimination ratio A.3.3.5 Product performance and assessment decision A.4 Sequential test plan A.4.1 General A.4.2 Calculation method for the sequential test plan A.4.3 Sequential test plan and its operating characteristic A.4.4 Confidence limits of sequential test A.4.4.1 General A.4.4.2 Confidence limits at acceptance A.4.4.3 Confidence limits at rejection A.4.5 Assessment made in advance by the sequential test manager A.4.5.1 General A.4.5.2 Assessment procedure A.5 Fixed-time test plans A.5.1 General A.5.2 Fixed-time test plans and their sampling characteristics A.5.3 Other fixed-time test plans A.5.4 Demonstrated MTBF of fixed-time test A.5.4.1 General A.5.4.2 Function of inspection parameters A.5.4.3 Confidence level A.5.4.4 Demonstrated interval of fixed-time test A.5.4.5 Estimation of MTBF on site A.5.5 Advanced assessment by the fixed-time test manager A.5.5.1 General A.5.5.2 Accept time A.5.5.3 Comparison with fixed-time test plan A.5.5.4 Expected test time A.5.5.5 Demonstrated MTBF during advanced assessment by the fixed-time test manager A.6 All-equipment test plan A.6.1 General A.6.2 All-equipment test time A.6.3 Evaluation A.6.4 Accept-reject criteria for the all-equipment test plan A.6.4.1 Accept decision A.6.4.2 Reject decision A.6.4.3 Reaching the boundary line A.6.5 Alternate all-equipment test plans Annex B (Normative) Combined environmental conditions B.1 Scope B.2 Profile B.2.1 Life profile B.2.2 Mission profile B.2.3 Environmental profile B.2.4 Test profile B.3 Combined environmental conditions B.3.1 General B.3.2 Fixed-ground equipment B.3.2.1 General B.3.2.2 Electrical stress B.3.2.3 Vibration stress B.3.2.4 Temperature stress B.3.2.5 Humidity stress B.3.3 Mobile ground equipment B.3.3.1 General B.3.3.2 Electrical stress B.3.3.3 Vibration stress B.3.3.4 Temperature stress B.3.3.5 Humidity stress B.3.4 Shipboard and underwater vehicle equipment B.3.4.1 General B.3.4.2 Naval surface craft (excluding speedboats) B.3.4.3 Naval submarine B.3.4.4 Landing craft and inland waterway dingey equipment B.3.5 Jet aircraft equipment B.3.5.1 General B.3.5.2 Basic principles and steps for determining test profiles B.3.5.3 Basic methods and guidance for identifying various parameters in tables of environmental profile data and test profile data B.3.5.4 Application example - determination of the test profile for a single mission B.3.5.5 Composite test profile for multi-mission applications B.3.6 Vertical and short take-off and landing aircraft equipment (hereinafter referred to as V/STOL aircraft) B.3.6.1 General B.3.6.2 Electrical stress B.3.6.3 Humidity stress B.3.6.4 Temperature stress B.3.6.5 Vibration stress B.3.6.6 Equipment state B.3.6.7 Test profile B.3.7 Turboprop aircraft and helicopter equipment B.3.7.1 Turboprop aircraft B.3.7.2 Helicopter B.3.8 Air-launched weapons and assembled external stores and their equipment B.3.8.1 General B.3.8.2 Test profiles for captive-flight and free-flight Annex C (Informative) Implementation of reliability verification test C.1 Scope C.2 Preparation for reliability verification test C.2.1 Test plan C.2.2 Test plan C.2.2.1 General C.2.2.2 Test purpose and application scope C.2.2.3 Normative references and documents C.2.2.4 Descriptions and requirements of the product under test C.2.2.5 Test statistical plan C.2.2.6 Combined environmental conditions C.2.2.7 Requirements of test facilities and test equipment C.2.2.8 Test items and qualification criteria C.2.2.9 Failure criteria, classification and statistics principles C.2.2.10 Pretest preparation C.2.2.11 Requirements of monitoring and recording during the test C.2.2.12 Requirements of failure reporting and handling C.2.2.13 Description of problems involved; C.2.3 Test procedure C.2.3.1 General C.2.3.2 Test facilities and equipment C.2.3.3 Combined environmental conditions and their application methods C.2.3.4 Test and detection C.2.3.5 Related work before the start of the test C.2.3.6 Test steps C.2.3.7 Failure handling procedure C.2.3.8 Test facility failure handling procedure C.2.4 Pretest preparation C.2.4.1 Site-entering inspection C.2.4.2 Capacity investigation of the test facility C.2.4.3 Fixture vibration measurement C.2.4.4 Mounting of the product under test and measurement of vibration characteristics C.2.4.5 Pretest inspection C.2.5 Review on pretest preparation C.3 Operation of reliability verification test C.3.1 Application of test stress C.3.2 Testing and monitoring in test C.3.3 Failure handling procedure during the test C.3.3.1 Failure reporting C.3.3.2 Failure analysis C.3.3.3 Failure correction (improvement) C.3.4 Preventive maintenance during the test C.3.5 End of test C.4 Requirements of relevant work after reliability verification test C.4.1 Failure zeroing C.4.2 Preparation of test report C.4.3 Preparation of test (work) conclusion report C.4.4 Review of test completion
This standard replaces GJB 899-1990 Reliability testing for qualification and production acceptance.
The following main changes have been made with respect to GJB 899-1990:
a) Some contents of this standard are modified according to MIL-HDBK-781A;
b) The terms are modified;
c) The contents of failure criteria and statistics principles are added;
d) The requirements of fixture measurement are added;
e) The calculation method of statistical plan is added;
f) Annex D of GJB 899-1990 is incorporated into Annex A herein;
g) Annex C is redrafted according to the requirements of pretest preparation, test operation and post-test work, with some new contents added.
Annexes A and B of this standard are normative, and Annex C is informative.
This standard was proposed by the Electronic Information Base Department of the General Armaments Department of the PLA.
GJB 899 was issued for the first time in 1990.
Reliability testing for qualification and production acceptance
1 Scope
This standard specifies the requirements of reliability testing for qualification and production acceptance (hereinafter referred to as “reliability verification test”) for systems and equipment (hereinafter referred to as “products”), and provides the statistical test plan (exponential distribution), parameter estimation, method for determining combined environmental conditions, and implementation procedure of reliability verification test.
This standard is applicable to reliability qualification test (work item 404) and reliability acceptance test (work item 405) specified in GJB 450A-2004.
The products to which this standard applies are divided into the following six categories according to their field service environment:
Category 1 Fixed-ground equipment
Category 2 Mobile ground equipment
A Wheeled vehicle
B Tracked vehicle
C Shelter configuration
D Manpack
Category 3 Shipboard equipment
A Naval surface craft (excluding speedboats)
B Naval submarine
C Landing craft and inland waterway dingey equipment
Category 4 Jet aircraft equipment
A Fixed-wing
B Vertical and short take-off and landing (V/STOL)
Category 5 Turboprop aircraft and helicopter equipment
A Turboprop aircraft
B Helicopter
Category 6 Air-launched weapons and assembled external stores and their equipment
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions, of any of these publications do not apply. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references or references with version not indicated, the latest edition of the normative document referred to applies.
GB 1920 Standard atmosphere (below 30 kilometers)
GJB 150-1986 (all parts) Environmental test methods for military equipments
GJB 450A-2004 General requirement for materiel reliability program
GJB 451A-2005 Reliability, maintainability and supportability terms
GJB 841 Failure reporting, analysis and corrective action systems
GJB 2725 General requirements for the competence of testing and calibration laboratories
GJB/Z 457-2006 General guidelines for airborne electronic equipment
HB 5652.1 Climatic extremes - Atmospheric temperature extremes
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GJB 451A-2005 and the followings apply.
3.1 demonstrated MTBF interval (θL, θU)
the probable range of true MTBF under test conditions, that is, an interval estimate of MTBF at a stated confidence level
3.2 observed MTBF (θ ̂)
the total test time of the product divided by the number of chargeable failures
3.3 lower test MTBF (θ1)
the lowest MTBF value which is acceptable. The probability of accepting equipment with a true MTBF that is not greater than the lower test MTBF (θ1) is at most 100β%. The lower test MTBF of products is equal to the lowest acceptable MTBF of products
3.4 upper test MTBF (θ0)
the probability of accepting product with a true MTBF that is not less than the upper test MTBF (θ0) is at least 100(1-a)%
3.5 predicted MTBF (θp)
the value of MTBF determined by the specified reliability prediction method
3.6 producer's risk (α)
the maximum probability that the true MTBF is determined to be less than the upper test MTBF (θ0) when the former is not less than the latter
3.7 consumer's risk (β)
the maximum probability that the true MTBF is determined to be not less than the upper test MTBF (θ0) when the true MTBF is less than the lower test MTBF (θ1)
3.8 discrimination ratio (d)
the ratio of the upper test MTBF (θ0) to the lower test MTBF (θ1)
d=θ0/θ1
4 General requirements
4.1 Selection of test sites
4.1.1 Selection of sites for reliability qualification test
The sites of reliability qualification test are selected by the following priority order and carried out under corresponding conditions upon the approval of the procuring activity:
a) The test shall be carried out in a qualified laboratory independent of the contractor whose quality system is established in accordance with GJB 2725 and passes accreditation;
b) Under the supervision of a qualified laboratory entrusted by the procuring activity, the test shall be carried out in the laboratory of the contractor.
4.1.2 Selection of sites for reliability acceptance test
The sites of reliability acceptance test are selected by the following priority order and carried out under corresponding conditions upon the approval of the procuring activity:
a) The test shall be carried out in a qualified laboratory independent of the contractor whose quality system is established in accordance with GJB 2725 and passes accreditation;
b) Under the supervision of the procuring activity, the test shall be carried out in the laboratory of the contractor.
4.2 Reliability qualification test plan, program and procedure
4.2.1 Reliability qualification test plan
The reliability qualification test plan of materiel is formulated according to the requirements of materiel. In the reliability verification test plan, the materiel reliability test work shall be comprehensively planned, providing the basis for the reliability verification test of materiel.
4.2.2 Reliability qualification test program
The reliability qualification test program is formulated according to the test plan of the materiel, or in combination with the product under test. It shall be formulated in combination with the characteristics of products, providing the basis for the reliability verification test of products.
It generally includes:
a) The selected statistical test plan (statistical plan for short), see Annex A;
b) Decision risk;
c) Combined environmental conditions;
d) Test requirements and failure criteria;
e) Other items.
Contents of GJB 899A-2009
Foreword VII
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Selection of test sites
4.1.1 Selection of sites for reliability qualification test
4.1.2 Selection of sites for reliability acceptance test
4.2 Reliability qualification test plan, program and procedure
4.2.1 Reliability qualification test plan
4.2.2 Reliability qualification test program
4.2.3 Reliability verification test procedure
4.3 Combined environmental conditions
4.3.1 General
4.3.2 Sources and determination criteria of test stress
4.3.3 Principles for determining combined environmental conditions
4.4 Tolerance of combined environmental conditions
4.5 Test facilities and instrumentation
4.6 Products under test
4.8 Failure mode, effect and criticality analysis
4.9 Performance testing (including functional inspection)
4.9.1 General
4.9.2 Pretest performance testing
4.9.3 Performance testing during test
4.9.4 Post-test performance testing
4.10 Failure reporting, analysis and corrective action system (FRACAS)
4.11 Failure criteria
4.12 Failure classification
4.13 Test organization
5 Detailed requirements
5.1 Reliability verification test plan, program, procedure and its control
5.1.1 Reliability verification test plan
5.1.2 Reliability qualification test program
5.1.3 Reliability verification test procedure
5.1.4 Review of reliability verification test plan
5.1.5 Review of reliability verification test program
5.1.6 Review of reliability verification test
5.1.7 Test working group
5.1.8 Reliability verification test report
5.2 Reliability qualification test
5.2.1 Statistical plan
5.2.2 Combined environmental conditions
5.2.3 Installation and connection of product under test on test facility
5.2.4 Measurement of performance parameters
5.2.5 Failure handling
5.2.6 Failure classification
5.2.7 Total test time
5.2.8 Accept and reject decisions
5.2.9 Corrective actions
5.2.10 Preventive maintenance
5.2.11 Refurbishment
5.2.12 Requirements of data items
5.3 Reliability acceptance test
5.3.1 General
5.3.2 Combined environmental conditions
5.3.3 Installation and connection of product under test on test facilities
5.3.4 Measurement of performance parameters
5.3.5 Failure handling
5.3.6 Failure classification
5.3.7 Total test time
5.3.8 Batch acceptance
5.3.9 All-equipment test acceptance
5.3.10 Batch rejection
5.3.11 All-equipment test rejection
5.3.13 Preventive maintenance
5.3.14 Refurbishment
5.3.15 Requirements of data items
6 Instructions
6.1 Task tailoring
6.2 Matters to be specified
Annex A (Normative) Statistical Plan of Reliability Verification Test and Reliability Parameter Estimation
A.1 Scope
A.2 Basis and classification of statistical plan
A.3 Selection of statistical plans
A.3.1 Selection of statistical plan categories
A.3.2 Factors to be considered when selecting statistical plans
A.3.3 Selection of statistical plan parameters
A.3.3.1 Sample size
A.3.3.2 Test time
A.3.3.3 Decision-making risk
A.3.3.4 Discrimination ratio
A.3.3.5 Product performance and assessment decision
A.4 Sequential test plan
A.4.1 General
A.4.2 Calculation method for the sequential test plan
A.4.3 Sequential test plan and its operating characteristic
A.4.4 Confidence limits of sequential test
A.4.4.1 General
A.4.4.2 Confidence limits at acceptance
A.4.4.3 Confidence limits at rejection
A.4.5 Assessment made in advance by the sequential test manager
A.4.5.1 General
A.4.5.2 Assessment procedure
A.5 Fixed-time test plans
A.5.1 General
A.5.2 Fixed-time test plans and their sampling characteristics
A.5.3 Other fixed-time test plans
A.5.4 Demonstrated MTBF of fixed-time test
A.5.4.1 General
A.5.4.2 Function of inspection parameters
A.5.4.3 Confidence level
A.5.4.4 Demonstrated interval of fixed-time test
A.5.4.5 Estimation of MTBF on site
A.5.5 Advanced assessment by the fixed-time test manager
A.5.5.1 General
A.5.5.2 Accept time
A.5.5.3 Comparison with fixed-time test plan
A.5.5.4 Expected test time
A.5.5.5 Demonstrated MTBF during advanced assessment by the fixed-time test manager
A.6 All-equipment test plan
A.6.1 General
A.6.2 All-equipment test time
A.6.3 Evaluation
A.6.4 Accept-reject criteria for the all-equipment test plan
A.6.4.1 Accept decision
A.6.4.2 Reject decision
A.6.4.3 Reaching the boundary line
A.6.5 Alternate all-equipment test plans
Annex B (Normative) Combined environmental conditions
B.1 Scope
B.2 Profile
B.2.1 Life profile
B.2.2 Mission profile
B.2.3 Environmental profile
B.2.4 Test profile
B.3 Combined environmental conditions
B.3.1 General
B.3.2 Fixed-ground equipment
B.3.2.1 General
B.3.2.2 Electrical stress
B.3.2.3 Vibration stress
B.3.2.4 Temperature stress
B.3.2.5 Humidity stress
B.3.3 Mobile ground equipment
B.3.3.1 General
B.3.3.2 Electrical stress
B.3.3.3 Vibration stress
B.3.3.4 Temperature stress
B.3.3.5 Humidity stress
B.3.4 Shipboard and underwater vehicle equipment
B.3.4.1 General
B.3.4.2 Naval surface craft (excluding speedboats)
B.3.4.3 Naval submarine
B.3.4.4 Landing craft and inland waterway dingey equipment
B.3.5 Jet aircraft equipment
B.3.5.1 General
B.3.5.2 Basic principles and steps for determining test profiles
B.3.5.3 Basic methods and guidance for identifying various parameters in tables of environmental profile data and test profile data
B.3.5.4 Application example - determination of the test profile for a single mission
B.3.5.5 Composite test profile for multi-mission applications
B.3.6 Vertical and short take-off and landing aircraft equipment (hereinafter referred to as V/STOL aircraft)
B.3.6.1 General
B.3.6.2 Electrical stress
B.3.6.3 Humidity stress
B.3.6.4 Temperature stress
B.3.6.5 Vibration stress
B.3.6.6 Equipment state
B.3.6.7 Test profile
B.3.7 Turboprop aircraft and helicopter equipment
B.3.7.1 Turboprop aircraft
B.3.7.2 Helicopter
B.3.8 Air-launched weapons and assembled external stores and their equipment
B.3.8.1 General
B.3.8.2 Test profiles for captive-flight and free-flight
Annex C (Informative) Implementation of reliability verification test
C.1 Scope
C.2 Preparation for reliability verification test
C.2.1 Test plan
C.2.2 Test plan
C.2.2.1 General
C.2.2.2 Test purpose and application scope
C.2.2.3 Normative references and documents
C.2.2.4 Descriptions and requirements of the product under test
C.2.2.5 Test statistical plan
C.2.2.6 Combined environmental conditions
C.2.2.7 Requirements of test facilities and test equipment
C.2.2.8 Test items and qualification criteria
C.2.2.9 Failure criteria, classification and statistics principles
C.2.2.10 Pretest preparation
C.2.2.11 Requirements of monitoring and recording during the test
C.2.2.12 Requirements of failure reporting and handling
C.2.2.13 Description of problems involved;
C.2.3 Test procedure
C.2.3.1 General
C.2.3.2 Test facilities and equipment
C.2.3.3 Combined environmental conditions and their application methods
C.2.3.4 Test and detection
C.2.3.5 Related work before the start of the test
C.2.3.6 Test steps
C.2.3.7 Failure handling procedure
C.2.3.8 Test facility failure handling procedure
C.2.4 Pretest preparation
C.2.4.1 Site-entering inspection
C.2.4.2 Capacity investigation of the test facility
C.2.4.3 Fixture vibration measurement
C.2.4.4 Mounting of the product under test and measurement of vibration characteristics
C.2.4.5 Pretest inspection
C.2.5 Review on pretest preparation
C.3 Operation of reliability verification test
C.3.1 Application of test stress
C.3.2 Testing and monitoring in test
C.3.3 Failure handling procedure during the test
C.3.3.1 Failure reporting
C.3.3.2 Failure analysis
C.3.3.3 Failure correction (improvement)
C.3.4 Preventive maintenance during the test
C.3.5 End of test
C.4 Requirements of relevant work after reliability verification test
C.4.1 Failure zeroing
C.4.2 Preparation of test report
C.4.3 Preparation of test (work) conclusion report
C.4.4 Review of test completion
