APU AUTO SHUT DOWN - NO ACCELERATION, IGV Actuator Fault (APS 3200)

TASK 49-00-00-810-952-A
APU AUTO SHUT DOWN - NO ACCELERATION, IGV Actuator Fault (APS 3200)

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2052210
ESPM 2053210
ESPM 205321A
AMM 49-00-00-710-008	Operational Test of the APU
AMM 49-11-11-000-003	Removal of the Power Plant (APU) (APS 3200)
AMM 49-11-11-400-003	Installation of the Power Plant (APU) (APS 3200)
AMM 49-23-51-000-003	Removal of the Inlet Guide Vane Actuator (APS 3200)
AMM 49-23-51-400-003	Installation of the Inlet Guide Vane Actuator (APS 3200)
ASM 496102

3. Fault Confirmation
Subtask 49-00-00-710-330-A ** ON A/C NOT FOR ALL

A. Do the operational test of the APU AMM 49-00-00-710-008.

4. Fault Isolation
Subtask 49-00-00-810-313-B ** ON A/C NOT FOR ALL

A. If the APU Last Leg Report gives the maintenance message:

IGV ACTUATOR (8014KM)
Fault Code Number: 053

NOTE: The APU SHUTDOWNS report gives the maintenance message:
NO ACCELERATION - IGV ACTUATOR (8014KM)
APU Auto Shut Down Fault Code Number: 053

do a visual check through the Air Inlet Plenum to make sure that the Inlet Guide Vanes (IGV) are in the closed position.

(1) If the IGV are not in the closed position:

remove the quick disconnect pin from the actuator support and make sure that the IGVs are moving freely AMM 49-23-51-000-003.

(a) If the IGVs are moving freely:

replace the INLET GUIDE-VANE ACTUATOR (8014KM) AMM 49-23-51-000-003 and AMM 49-23-51-400-003.

1 If the fault continues:

check and repair the wiring from the ECB (59KD) AB/E8, E9, E11, E12, G8, G9 to the INLET GUIDE-VANE ACTUATOR (8014KM) P21/1, 2, 3, 4, 5, 6 ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

(b) If the IGVs are not moving freely:

Subtask 49-00-00-710-331-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:27 UTC