MIL-J-26149E
6.6 Superseding data. This specification supersedes and replaces the following:
MIL-J-7398 |
Jack, B-4A |
Hand Hydraulic, Folding Tripod, 30 ton Capacity Type |
|
L |
MIL-J-7399 MIL-J-7400 |
Jack, Jack, |
Hydraulic, Tripod Hydraulic, Tripod 10 Ton Capacity, Type 6-6 |
L |
MIL-J-26013 MIL-J-26014 |
Jack, Jack, |
Aircraft, Hydraulic, Type A-5 Hand, Hydraulic, Axle 20 Ton Capacity, Type F-1 |
L L L L L |
MIL-J-26015 MIL-J-26016 MIL-J-38229 MIL-J-38395 MIL-J-38475 |
Jack, Jack, Jack, Jack, Jack, |
Aircraft Hydraulic, Axle, 35 Ton Capacity, Type F-2 Aircraft Landing Gear, 10 Ton Capacity, Type A-6 Hydraulic, Tripod MMU-59/E Hydraulic, Tripod MMU-45/E Hydraulic, Tripod MMU-107/E, 40 Ton Capacity |
L L |
MIL-J-58094 MIL-J-83010 |
Jack, Jack, |
Hydraulic, 3 Ton Aircraft Landing Gear MMU-87/E, 35 Ton Capacity |
L |
MIL-J-83278 |
Jack, |
Hydraulic, Tripod MMU 129/E, 60 Ton to 128 Inch |
Range
6.7 Definitions. For the purpose of this specification, the following definitions apply:
6.7.1 Individual Test(s). Individual Test(s) shall be a test or a series of tests conducted to verify, prove, check or observe a particular characteristic, condition, dimension, performance or state of the piece-part
or assembly.
6 7.2 Mean-time-between-failures. The mean life or
mean-time-between-failures is the arithmetical mean (average) of the operating time between failures.
6.7.3 C ycle.
One cycle consists of raising and lowering the hydraulic
ram, under rated capacity load, from fully retracted position to fully extended position and returned to the fully retracted position.
6.7.4 R eliability.
Reliability is defined as the probability of
performing a specified function under given conditions without failure for a specified period of time. Recognizing that, in general, the rate of failure of
equipment is fairly constant throughout the life of the equipment, the probability of nonfailure over an operating time Interval decreases exponent-
ially as a function of the length of the interval, during which time there is
a constant failure rate, and can be expressed as follows:
Confidence level: 90 percent
MTBF = Total test time
2.3
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