No Start with Low or No Fuel Flow Indication on Engine 1

---

1. Possible Causes
· FILTER-FUEL, ENG 1 ( 2000EM1 )
· LP/HP fuel pump
· FLOWMETER-FUEL ( 4010KS )
· FMU
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 12-32-28-281-001 Drain Water Content
Ref. AMM 12-32-28-281-003 Sample Fuel for Microbiological Contamination Analysis
Ref. AMM 12-32-28-281-004 Fuel Sampling for a Microbiological Contamination Test with a
Microb Monitor Test Kit (OBSOLETE - REPLACED BY TASK
12322828100300)
Ref. AMM 73-12-41-000-010 Removal of the Low Pressure (LP)/High Pressure (HP) Fuel Pump
Ref. AMM 73-12-41-400-010 Installation of the Low Pressure (LP)/High Pressure (HP) Fuel Pump
Ref. AMM 73-12-42-000-010 Removal of the Fuel Filter Element
REFERENCE DESIGNATION
Ref. AMM 73-12-42-400-010 Installation of the Fuel Filter Element
Ref. AMM 73-22-52-000-010 Removal of the Fuel Metering Unit (FMU)
Ref. AMM 73-22-52-400-010 Installation of the Fuel Metering Unit (FMU)
Ref. AMM 73-31-17-000-010 Removal of the Fuel Flow Transmitter
Ref. AMM 73-31-17-400-010 Installation of the Fuel Flow Transmitter
3. Fault Confirmation
Subtask 80-00-00-710-101-A
A. Test
Not applicable.
4. Fault Isolation
Subtask 80-00-00-810-084-A
A. If the fault symptom is identified by the crew observation: ENG1 START-No start, low or no fuel flow
indication:
· Replace the FILTER-FUEL, ENG 1 ( 2000EM1 ) Ref. AMM 73-12-42-000-010 and Ref.
AMM 73-12-42-400-010 .
(1) If the fault continues:
· Replace the LP/HP fuel pump Ref. AMM 73-12-41-000-010 and Ref. AMM 73-12-41-400-010 .
(2) If the fault continues:
· Replace the FLOWMETER-FUEL ( 4010KS ) Ref. AMM 73-31-17-000-010 and Ref.
AMM 73-31-17-400-010 .
(3) If the fault continues:
· Replace the FMU Ref. AMM 73-22-52-000-010 and Ref. AMM 73-22-52-400-010 .
(4) If you find metal debris on the filter, do a check of the fuel system for contamination Ref.
AMM 12-32-28-281-001 Ref. AMM 12-32-28-281-003 and Ref. AMM 12-32-28-281-004 . [Rev.6 from Feb 2017] 2026.04.04 04:38:42 UTC