TM 1–1520–238–T–1
4–4
Change 5
4–1
ADS – INTERACTIVE FD/LS CHECK (cont)
4–1
TASK
RESULT
(5) Repeat FD/LS check
beginning with step c. If
NO–GO repeats after
CORRECTIVE ACTION,
refer to
TM 9-1230-476-20-2.
NOTE
Record all NO–GOs before rotating DATA
ENTRY switch to STBY (ADC).
f. On DEK, rotate
DATA ENTRY switch
to STBY (ADC).
NOTE
If this FD/LS check is to be followed by the AIR
DATA SYSTEM – OPERATIONAL CHECK
(TM 9-1230-476-20-2), omit step 3.
3. Perform SYSTEMS – POWER DOWN (para 3–2) if
power is no longer required.
FD/LS NO–GO
DISPLAY
CORRECTIVE ACTION
AIR DATA
PROCESSOR NO–GO
AFT AVIONICS BAY
Replace air data processor
(TM 9-1230-476-20-1). If
replacement does not
remove NO–GO, refer to
TM 9-1230-476-20-2 for
troubleshooting the air data
system (ADS).
OMNI DIR AIRSPEED
SENSOR NO–GO
MAIN ROTOR MAST
Replace omnidirectional air
speed sensor
(TM 9-1230-476-20-1). If
replacement does not
remove NO–GO, refer to
TM 9-1230-476-20-2 for
troubleshooting the ADS.
END OF TASK
