TM 1–1520–238–T–1
Change 5
4–117
4–17 APU – INTERACTIVE FD/LS CHECK (cont)
4–17
TASK
RESULT
(1) Perform SYSTEMS
– POWER DOWN
(para 3–2) and APU
shutdown (para 3–3).
(2) Perform CORRECTIVE
ACTION indicated for first
NO–GO displayed on
HOD.
(3) Perform SYSTEMS
– POWER–UP
(para 3–1).
(4) On DEK, rotate DATA
ENTRY switch to STBY
for 5 seconds, then back
to FD/LS (ADC).
(5) Repeat FD/LS check
beginning with step b .If
NO–GO repeats after
CORRECTIVE ACTION,
refer to
TM 1-1520-238-T-8.
NOTE
Record all NO–GOs before rotating DATA
ENTRY switch to STBY (ADC).
f. On DEK, rotate
DATA ENTRY switch
to STBY (ADC).
NOTE
After APU start–up has been initiated and no
failures detected within a 90–second period
has elapsed, the advisory message APU GO
ANY KEY FOR FDLS MENUS appears on
the HOD.
If this FD/LS check is to be followed by a
APU – OPERATIONAL CHECK
(TM 1-1520-238-T-8), omit step 3.
3. Perform SYSTEMS – POWER DOWN (para 3–2) and
APU shutdown (para 3–3) if power no longer required.
