TM 10-1670-305-23&P
0018 00-2
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - CONT
0018 00
PMCS
Interval periods are defined as follows:
B-Before Operation
D-During Operation
A-After Operation
Table 1. Preventive Maintenance Checks and Services for Automatic Ripcord Release,
Model 451
Interval
Item
No.
B
D
A
Location Item to
Check/Service
Procedure
Not fully Mission
Capable if:
1
Aneroid
a.
Check for aneroid
leakage (WP 0008 00)
a.
Aneroid is
leaking
b.
Check that AR2 is
cocked.
b.
AR2 is not
cocked
2
Power Cable and
Housing
If unit actuated, inspect
power cable and
housing (refer to
WP 0019 00).
Power cable is
frayed or binds.
Power housing
conduit has loose
convolutions.
ADDITIONAL PMCS
The AR2 shall be tested and certified at each of the following times. Refer to WP 0009 00 for
testing with the Model 452 Test Chamber Assembly. Refer to WP 0010 00 for testing with the
Model 453 Electronic Test Chamber Assembly.
1. When the AR2 is put into service after being stored longer than 120 days.
2. At each 120-day interval while in service.
3. After 50 jumps, regardless of time interval.
4. After any jump where there is a possibility that the AR2 was damaged or malfunctioned.
The AR2 shall be taken out of service and returned to depot for overhaul after 500 cumulative
actuations or 4 years, whichever comes first. Refer to Maintenance Log, WP 0008 00. Cumulative
actuations include both those recorded in the Jump Log Record and those from the AR2
Maintenance Log sheets, WP 0042 00.
