240
Appendix D
Table D.5 Generic life-expectancy
distributions
ta
Component or part
Upper extreme Mean ta/lO 6
Lower extreme
Accelerometers
0.052 hr,
0.02 hr,
0.001 hr,
0.5 cycle
0.1 cycle
0.02 cycle
Accumulators
0.1 hr,
0.06 hr,
0.02 hr,
0.01 cycle
0.008 cycle
0.002 cycle
Actuator, electric counter
0.1 cycle
Actuator, linear
0.2 cycle,
0.0004 hr
Actuator, rotary
10.0 cycles
0.50 cycle
0.001 cycle
Air-conditioning unit
0.0017 hr
0.004 hr,
0.007 hr
0.15 cycle
Alternators
0.01 hr
0.009 hr
0.001 hr
Amplifier, signal transistor, a-c
0.004 hr
Antenna drivers
0.013 hr
0.008 hr
0.001 hr
Antennas, plasma sheath
0.001 hr
0.000050 hr
0.000040 hr
Antenna switch
0.04 hr
Attenuators
0.01 hr
0.005 hr
0.0025 hr
0.0036 hr
Auxiliary power units
0.001 hr
0.000500 hr
0.0000013 hr
0.005 cycle
0.002 cycle
0.00003 cycle
0.0015 cycle
0.016 hr
0.12 hr
0.0008 hr
0.040 hr
0.0012 hr
0.0005 hr
0.00001 hr
0.02 hr
0.007 hr
0.002 hr
0.016 hr
0.006 hr
0.0005 hr
0.008 hr
0.04 hr
0.00065 hr
3.0 cycles
0.002 hr
0.006 hr
0.020 hr
0.052 hr
0.016 hr
0.6 cycle
0.01 cycle
Batteries, chargeable
Battery, lead-acid
Battery, primary type
Beacon, S-band radar
Bearings, dry
Bearings, lubricated
Bearings, ball
Bearings, ball, midget
Bearings, ball, precision
Bearings, ball, turbine
Bearings, clutch release
Bearings, heavy-duty, lub
Bearings, light-duty, lub
Bearings, precision, lub
Bearings, rotary, roller, lub
Bearings, stagger roller
Bearings, tracker roller
Bellows, plastic
Bellows, steel and beryllium
copper
Bellows, aluminium and
magnesium
Blowers
0.001 hr
0.003 hr
0.01 hr
0.05 hr
0.050 cycle
10.0 cycles
0.1 cycle
0.008 hr
0.1 cycle
0.01 cycle
0.004 hr
0.00005 hr
0.0001 hr
0.001 hr
0.005 hr
0.001 cycle
0.001 cycle
0.001 cycle
0.001 hr