TM 10-1670-305-23&P
0018 00-4
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) - CONT
0018 00
PMCS - CONT
Interval periods are defined as follows:
B-Before Operation
D-During Operation
A-After Operation
Table 3. Preventive Maintenance Checks and Services for Electronic Test Chamber Assembly,
Model 453
Interval
Item
No.
B
D
A
Location Item to
Check/Service
Procedure
Not fully Mission
Capable if:
1
Tubing
Integrity of external
tubing; finger tighten
tubing.
Tubing damaged or
connectors loose.
2
Electrical
connectors
Check that electrical
connections are secure.
Electrical
connectors loose or
unplugged
3
Altitude chamber
gasket
Check condition of
gasket.
Gasket worn,
damaged or out of
groove in chamber.
4
Fan on
compressor not
spinning
Press HOLD DOWN
TO COCK switch until
fan begins to spin.
Cooling fan not
spinning.
ADDITIONAL PMCS
1. Perform the following functional tests every 30 days while in use.
a. Altitude Stability Test (Refer to WP 0010 00)
b. Fall Rate Selector Accuracy (Refer to WP 0010 00).
Perform altitude accuracy verification every 185 days (refer to WP 0025 00). Calibration shall be
performed by authorized calibration activity only.
