APU AUTO SHUT DOWN - AIR-INTAKE NOT OPEN, Air-Intake Flap-Actuator Fault (APS 3200)

TASK 49-00-00-810-882-A
APU AUTO SHUT DOWN - AIR-INTAKE NOT OPEN, Air-Intake Flap-Actuator Fault (APS 3200)

1. Possible Causes

AIR INTAKE-FLAP ACTUATOR (4015KM)
wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2052210
ESPM 2053210
AMM 49-16-00-710-004	Operational Test of the Air Intake Flap and Diverter (APS 3200)
ASM 491601
AMM 49-16-51-000-002	Removal of the Air-Intake Flap Actuator (APS 3200)
AMM 49-16-51-400-002	Installation of the Air-Intake Flap Actuator (APS 3200)

3. Fault Confirmation
Subtask 49-00-00-710-212-A ** ON A/C NOT FOR ALL

A. Do the operational test of the Air-Intake Flap Actuator (4015KM) AMM 49-16-00-710-004.

4. Fault Isolation
Subtask 49-00-00-810-133-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message:

INLET FLAP ACTR (4015KM)
Fault Code Number: 121
Additionally:
Fault Code Number: 025 or 058 or None

NOTE: The APU SHUTDOWNS report gives the maintenance message:
AIR INTAKE NOT OPEN - INLET FLAP ACTR (4015KM)
APU Auto Shut Down Fault Code Number: 121

replace the AIR INTAKE-FLAP ACTUATOR (4015KM) AMM 49-16-51-000-002 and AMM 49-16-51-400-002.

(1) If the fault continues:

do a check and repair the wiring from the ECB (59KD) AC/5, 4 to the electrical connector 7527VCA/J, K ASM 491601 ESPM 2052210 ESPM 2053210.
do a check and repair the wiring from the ECB (59KD) AB/G2, G3, G4, G5 to the electrical connector 7527VCA/D, C, E, B. ASM 491601 ESPM 2052210 ESPM 2053210.
do a check and repair the wiring from the electrical connector 7527VCA/A, L, F, to the ground ASM 491601 ESPM 2052210 ESPM 2053210.

Subtask 49-00-00-710-213-A ** ON A/C NOT FOR ALL

B. Do the operational test of the Air-Intake Flap Actuator (4015KM) AMM 49-16-00-710-004.

[Rev.8 from Aug 2018] 2026.04.04 04:34:23 UTC