APU AUTO SHUT DOWN - NO ACCELERATION, APU Flow Divider (8024KM) (APS 3200)

TASK 49-00-81-810-876-A
APU AUTO SHUT DOWN - NO ACCELERATION, APU Flow Divider (8024KM) (APS 3200)

1. Possible Causes

FLOW DIVIDER (8024KM)
Pilot FUEL-NOZZLE
Main FUEL-NOZZLE
ELECTRONIC CONTROL BOX [59KD]
APU [4005KM]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 49-00-81-810-900-A	APU SLOW START, Start System (APS 3200)
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 49-31-41-000-002	Removal of the Pilot Fuel Nozzles and Manifold (APS 3200)
AMM 49-31-41-400-002	Installation of the Pilot Fuel Nozzles and Manifold (APS 3200)
AMM 49-31-42-000-003	Removal of the Main Fuel Nozzles and Manifold (APS 3200)
AMM 49-31-42-400-005	Installation of the Main Fuel Nozzles and Manifold (APS 3200)
AMM 49-32-12-000-002	Removal of the Flow Divider (APS 3200)
AMM 49-32-12-400-002	Installation of the Flow Divider (APS 3200)
AMM 49-61-34-000-002	Removal of the Electronic Control Box (ECB) (APS 3200)
AMM 49-61-34-400-002	Installation of the Electronic Control Box (ECB) (APS 3200)
AMM 49-73-00-00-

3. Fault Confirmation
Subtask 49-00-81-710-254-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 49-00-81-810-181-A ** ON A/C NOT FOR ALL

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

FLOW DIVIDER (8024KM):
Fault Code Number: 053

NOTE: The APU SHUTDOWNS report gives the maintenance message:
NO ACCELERATION - FLOW DIVIDER (8024KM)
APU Auto Shut Down Fault Code Number: 053

replace the FLOW DIVIDER (8024KM) AMM 49-32-12-000-002 and AMM 49-32-12-400-002.

(1) If the fault continues:
Interrogate CFDS for APU fault message. Use prompts (>) to go to the fault conditions screen AMM 49-73-00-00-.

Print Fault Condition Screen and review APU speed (NA).
(a) If speed (NA) is less than 30%:

Do the TSM procedure (Ref. TSM TASK 49-00-81-810-900).

(b) If speed (NA) is more than or equal to 30%:

replace the Pilot FUEL-NOZZLE AMM 49-31-41-000-002 and AMM 49-31-41-400-002.

1 If the fault continues:

replace the Main FUEL-NOZZLE AMM 49-31-42-000-003 and AMM 49-31-42-400-005.

2 If the fault continues:

replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-002 and AMM 49-61-34-400-002.

3 If the fault continues:

replace the APU [4005KM] AMM 49-11-11-000-003 and AMM 49-11-11-400-003.

Subtask 49-00-81-710-255-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:31 UTC