TM 9-4120-411-14
Table 4-1. Unit Preventive Maintenance Checks and Services for FDECU - Continued.
Item
Interval
Item to be
Procedure
"Not Fully Mission
No.
Checked or Serviced
Capable if":
6
Semi-
Heater Assembly
a. Loosen clamp and disconnect supply
Heater assembly
annually
air duct from heater barrel.
shows evidence of
b. Check heater assembly for any vis-
overheating or other
ible damage or evidence of overheat-
damage.
ing. If damaged, replace per para-
Heater assembly dirty
enough to obstruct air
c. Clean any accumulated dirt from
flow.
heater assembly. If necessary re-
move to clean.
7
Semi-
Refrigeration Sys-
a. Open cover and panels as necessary
Refrigeration system
annually
tem Components,
to access components.
component damaged
Tubing and Fittings
b. Check components for damage or
or leaking.
evidence of refrigerant leak. Notify
Tubing or fittings are
direct support maintenance if dam-
damaged or leaking.
aged or leak is suspected.
c. Check tubing and fittings for dam-
age such as kinks or pinched as well
as evidence of leaking. Notify direct
support maintenance if damaged or
leak is suspected.
8
Semi-
Outside Coil
a. Check outside coil for any visible
Outside coil leaking or
annually
damage or evidence of leaking.
damaged.
Notify direct support maintenance if
Outside coil dirty
leaking or damaged.
enough to obstruct air
b. Clean any accumulated dirt from
flow.
coil.
4-16
