TM 55-1520-240-T
15-7.3 APU TESTER OPERATION
15-7.3
References:
TM 55-1520-240-23
TM 55-4920-431-13
Equipment Condition:
TM 55-1520-240-23:
Battery Connected
External Electrical Power Off
INITIAL SETUP
Applicable Configurations:
All
Tools:
Electrical Repairers Tool Kit.
NSN 5180-00-329-4915
APU Tester 161226-200
Materials:
None
Personnel Required:
Aircraft Electrician
TASK
RESULT
TASK
RESULT
1.
2.
3.
4.
5.
6.
7.
8.
9.
Turn pressure equalizer knob to
OPEN.
Open case.
Remove P1, P2 and P5 harnesses.
Inspect equipment for any physical
damage.
Zero meters.
Connect harnesses to the
applicable J1, J2 and J5 connectors
on test set.
Remove 136P1 and 136P2 from ESU
and connect to the corresponding
cable connectors of harnesses.
Connect the remaining harness
plugs to J1 and J2 of ESU.
Perform test in accordance with
applicable task.
Pressure on cover is released.
NOTE
During tests, leave BLEED AIR
OPEN/CLOSE switch, MAX. AIR
switch, and ECONO AIR switch in
down position.
Repair or replace as required.
10.
11.
12.
13.
Wiring should be similar to that shown
in accompanying diagram.
After completion of task, return all
tester switches to DOWN position.
Disconnect harnesses and stow in
cover.
Close cover and rotate pressure
equalizer knob to CLOSE.
Report any tester operation
problems on proper form as
described in DA Pam 738-751.
Tester is secured.
FOLLOW-ON MAINTENANCE:
TM55-4920-431-13
REFER TO TASK BEING PERFORMED.
GO TO NEXT PAGE
15-142
Change 8
