ARMY TM 9-4120-380-14
NAVY EE-000-BA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-21
Table 4-1. Unit Preventive Maintenance Checks and Services (PMCS)
Quarterly Schedule - Continued
Not Fully Mission
Item
Procedure
Interval
Item to Check/Service
Capable if:
No.
This inspection is performed with
power on Proceed with extreme
caution to prevent dangerous,
possible fatal shock.
15
Quarterly
Sight Glass
a. Remove return air filter (para-
graph 4.26) to access sight
glass.
b. Check that glass window Is not
Glass window is
broken or cracked. Check for
cracked or broken or
evidence of leakage Check
there is evidence of
for bubbles or milky appearance.
leakage Bubbles or
Contact direct support
milky appearance are
maintenance if bubbles or
evident.
milky appearance are present.
c. To repair or replace sight glass,
contact Direct Support
Maintenance.
4-18
