PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
Interval periods are defined as follows:
Table 2. Preventive Maintenance Checks and Services for Test Chamber Assembly, Model 452
Location Item to
Not fully Mission
Check that altimeter
barometric adjustment is set
to 29.92 in Hg.
Altimeter is set to
Check condition of gasket.
Gasket worn or
Check that both fans are
spinning. If not, cycle
until fans begin to spin.
Cooling fans are
The Model 452 Test Chamber Assembly, while in service, shall be functionally tested at 30-day
intervals (refer to WP 0009 00).
The altimeter shall be tested and calibrated at 120-day intervals (refer to WP 0024 00).
Calibration shall be performed by authorized calibration activity only.