MIL-PRF-21480B
CONTENTS
PARAGRAPH
PAGE
4.5.27
Contamination by fluids........................................................................................ 33
4.5.28
Endurance ............................................................................................................. 33
4.5.28.1
Air cooled components ......................................................................................... 34
4.5.28.2
Liquid cooled components .................................................................................... 34
4.5.29
Loss of cooling...................................................................................................... 35
4.5.30
Spline wear examination....................................................................................... 35
4.5.31
Input shaft shear .................................................................................................... 35
4.5.32
Explosive atmosphere ........................................................................................... 35
4.5.33
Toxicity and fire resistance ................................................................................... 35
4.5.34
Coolant contamination .......................................................................................... 35
4.5.35
Acceleration (inertia loads) ................................................................................... 35
4.5.36
Reliability and maintainability.............................................................................. 35
5.
PACKAGING ................................................................................................................... 36
5.1
Packaging .............................................................................................................. 36
6.
NOTES..... ....................................................................................................................... 36
6.1
Intended use .......................................................................................................... 36
6.2
Acquisition requirements ...................................................................................... 36
6.3
Qualification ......................................................................................................... 37
6.3.1
Provisions governing qualification ....................................................................... 37
6.3.2
Qualification sample submittal ............................................................................. 37
6.4
Cross reference...................................................................................................... 37
6.5
Standard design practices...................................................................................... 37
6.5.1
Materials and structural design ............................................................................. 37
6.5.1.1
Recycled, recovered, or environmentally preferable materials ............................ 37
6.5.1.2
Corrosion............................................................................................................... 38
6.5.1.3
Fasteners, inserts and retaining hardware ............................................................. 38
6.5.1.4
Bearing installation and lubrication ...................................................................... 38
6.5.2
Electrical and electronics design........................................................................... 38
6.5.2.1
Wiring and distribution ......................................................................................... 38
6.5.2.2
Electronics internal wiring and electric connections ............................................ 38
6.5.2.3
Electronics (semiconductors, resistors, capacitors, transformers, and relays)...... 38
6.5.2.4
Microelectronic devices ........................................................................................ 38
6.5.3
Parts de-rating ....................................................................................................... 38
6.5.4
Reliability.............................................................................................................. 39
6.5.5
Identification markings ......................................................................................... 39
6.5.6
Oil, fuel, and hydraulic fluids ............................................................................... 39
6.6
Environmental requirements tailoring .................................................................. 39
6.6.1
Temperature altitude ............................................................................................. 39
6.6.2
Salt-fog (corrosion resistance) .............................................................................. 39
6.6.3
Vibration ............................................................................................................... 39
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