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Page Title:
Table III. Maintainability Requirements |
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|  MIL-N-81604C(AS)
MAINTAINABILITY REQUIREMENTS
TABLE III.
MAXTTR/Hrs
MTTR/Hrs
Unit
1.5
IMU
1.0
0.7
0.5
ANCU
PSU ( Excluding Battery
0.6
0.4
Charge)*
0.6
0.4
CIU
*
*Maximum recharge interval after one 10-second dis-
charge shall be two hours if the limit switch (17.0
volts) is operating properly and prevents the
battery from discharging to a level lower than 17.0
volts. Maximum recharge interval on a battery which
is completely discharged shall be 20 hours. The
20-hour recharge interval reflects the time required
to recharge its battery if the limit switch fails
permitting the battery to discharge completely.
3.3.9 Standard Conditions - The following conditions shall be
used to establish normal performance characteristics under stan-
dard conditions and for making laboratory bench tests.
Room ambient (25C 5C)
Temperature
Normal ground
Altitude
None
Vibration
Room ambient up to 90 percent
Humidity
relative humidity
115 1.0 VAC 400 Hz and
Input power voltage
27.5 0.5 VDC
3.3.10 Service Conditions - The equipment shall operate satis-
factorily under any of the environmental service conditions or
reasonable combinations of these conditions as specified in
MIL-E-5400. Class 2X requirements shall apply to the IMU, ANCU,
*
and to the PSU with the listed exceptions. See figures 20, 21,
22, 25, 26, 28, and 29. Class 1 requirements shall apply to the
CIU. IMU intermittent operation as specified in MIL-E-5400 shall
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