TM 9--2350--292--20--1
0018 00--11
AUXILIARY POWER UNIT FAILS TO CRANK -- CONTINUED
0018 00
CONTINUED FROM STEP Q
Is glow plug warm or hot?
Z
no
yes
CONTINUED FROM STEP Y
Does relay click?
no
yes
AA
Replace glow plug (WP 0629 00). Verify
fault is corrected.
1. Turn PREHEAT switch to MOM ON
(TM 9--2350--292--10).
2. Place hand close to, but not directly on,
glow plug.
3. Feel for glow plug heating up.
1. Reconnect harness 4W700 P1 to APU
control box, if disconnected.
2. Reconnect harness 4W702 P2 to bulkhead
disconnect, if disconnected.
3. Turn MASTER switch ON
(TM 9--2350--292--10).
4. Turn PREHEAT switch to MOM ON
(TM 9--2350--292--10).
5. Turn START switch to MOM ON
(TM 9--2350--292--10), turn START switch
ON and OFF several times.
6. Listen for starter relay to click.
7. Turn MASTER switch OFF.
Go to Step AG.
CONTINUED ON NEXT PAGE
