Downloaded from https://www.everyspec.com MIL-STD-81OC 10 March 197S SUPERSEDING MIL-STD-81OB 15 June 1967 B MILITARY STANDARD EN V I RON M EN T AL T EST M ET H ODS FSC MISC

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Downloaded from https://www.everyspec.com MIL-STD-81OC 10.March 1975 EnvironmentalTest Methods MIL-STD-81OC 1. This Military Standard is approved for use by al1 Departmentsand Agencies of the Department of Defense. 2. Recommendedcorrections, additions, or deletions should be addressed to Commander, Aeronautical Systems Division, Attn: ASD/ENYESA; Wright- Patterson Air Force Base.,Ohio 45433. L :. ,:. .. ,( ii

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Downloaded from https://www.everyspec.com MIL-STD-81OC CONTENTS , Section Page 1 1.1 1.2 1.3 1.4 1..5 1.6 2 2.1 2.2 3 3.1 3.1.1 3.1.2 3.1.3 3.1.4 3.1.4.1 3.1.4.2 3.2 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 3.2.6 3.3 3.3.1 3.3.1.1 3.3.1.2 3.3.1.3 3.3.”1.4 3..4 4 4.1 5 5.1 6 6.1 SCOPE 1 Purpose 1 Application of test methods 1 Numbering system 1 Revision of standard 1 Revision of test methods 1 Method of reference 1 APPLICABLE DOCUMENTS 2 2 Other publications 2 GENERAL REQUIREMENTS 3.

Test conditions 3 Measurementsof test conditions 4 Tolerance of test conditions 4 Accuracy of test apparatus 4 Stabilizationof test temperature 5 Operating 5 Nonoperating 5 Performance of test 5 Pretest performance record 5 Installationof test item in test facility 5 Performance check during test 6 Post-test data 6 Test data 6 Failure criteria 6 Test facilities and apparatus 7 Test chamber 7 Volume of test chamber 7 Heat source 7 Location of temperature sensors 7 Internal air circulation 7 Test data 7 TEST SEQUENCE 7 7 TEST METHODS 11 11 NOTES 11 Internationalstandardizationagreement 11 . 111

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Downloaded from https://www.everyspec.com MIL-STD-81OC CONTENTS TEST METHODS Method No.

Page 500.1 501.1 502.1 503.1 504.1 505.1 506.1 507.1 508.1 509.1 510.1 511.1 512.1 513.2 514.2 515.2 516.2 517.2 518.1 519.2 Low Pressure (Altitude) “HighTemperature 500.1-1 - 500.1-2 501.1-1 - 501.1-3 502.1-1 - 502.1-2 503.1-1 - 503.1-2 504.1-1 - 504.1-13 505.1-1 - 505.1-4 506.1-1,- 506.1-3 507.1-1 - 507.1-11 508.1-1 - 508.1-5 509.1-1 - 509.1-8 .510.1-1- 510.1-3 Low Temperature TemperatureShock Temperature-Altitude Solar Radiation (Sunshine) Rain Humidity Fungus Salt Fog Dust (Fine Sand) Explosive Atmosphere , i Leakage (Immersion) Acceleration Vibration Acoustical Noise 511.1-1 - 511.1-11 512.1-1 - 512.1-3 513.2-1 - 513.2-8 514.2-1 - 514.2-41 515.2-1 - 515.2-11 516.2-1 - 516.2-11 517.2-1 - 517.2-13 518.1-1’- 518.1-3 519.2-1 - 519.2-63 Shock Space Simulation (UnmannedTest) Temperature-Humidity-Altitude Gunfire Vibration, Aircraft TABLES Table I.

Table 504.1-1 Recommendedtest sequence (Read dew) 8-10 Equipment Categories for Temperature- Altitude Tests 504.1-2 Test Conditions for Temperature-Altitude Table 504.1-11 Tests 504.1-9 G Levels for Structural Test (ProcedureI) 513.2-3 G Levels for OperationalTest Table.513.2-I Table S13.2-11 Table 514.2-11 (ProcedureII) 513.2-4 Test Procedure and Time .Sch6duIe Chart for Equipment Installed in Propellor 514.2-21 Airplanes Equipment Category b.1 Table 514.2-11A Random Vibration Test Criteria for Jet Aircraft Equipment, Category b.2 514.2-23 Table 514.2-III Test Procedure and Time Schedule Chart for Equipment Installed in Helicopters- 514.2-25 Equipment Category (c) iv I

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