Mechanical Failure Rates for Non-Electronic Reliability
Table D.5 continued
245
Component or part
Upper extreme Mean t6/106 Lower extreme
Transducer
Transducer, potentiometer
Transducer, strain gage
Transducer, temperature
Transducer, low-pressure
Transducer, power
Transducers, pressure
0.1 cycle
Transformers
0.03 hr
Transistors
Tube, electron, receiving
Tubes, electron, power
0.01 hr
Turbines (limited by bearings)
0.015 hr
Turbines, gas
0.1 hr
0.01 hr
0.015 hr
0.02 hr
0.005 hr
10.0 cycles
0.02 hr
0.05 cycle
0.01 hr
0.2 hr
0.009 hr
0.007 hr
0.011 hr
0.05 hr
0.02 cycle
0.004 hr
0.003 hr
0.008 hr
0.007 hr
Valves
0.2 cycle
0.15 cycle
0.06 cycle
1. Assume continuous operation.
2. Assume a theoretical laboratory computer element or component in order to comply with
general trend data for actual usage element or component. Equipment that is normally not used
in laboratory computers can be visualized in such an application for purposes of arriving at a
generic condition.
3. Assume no adjustments other than automatic.
4. The mean and extremes do not necessarily apply to statistical samples but encompass
application and equipment-type variations, also.
5. The values should be applied as operating installation conditions only and no comparisons made at the generic level.
Table D.6 Definitions
of environment abbreviations
Abbreviation
Environment
AIF
AIT
ARW
AUF
AUT
GB
GF
GM
ML
NS
NSB
NU
Airborne, Inhabited, Fighter
Airborne, Inhabited, Transport
Airborne, Rotary Winged
Airborne, Uninhabited, Fighter
Airborne, Uninhabited, Transport
Ground, Benign
Ground, Fixed
Ground, Mobile
Missile, Launch
Naval, Sheltered
Naval, Submarine
Naval, Unsheltered