No Light Off with Correct Fuel Flow on Engine 1 or 2

TASK 74-00-00-810-817-A
No Light Off with Correct Fuel Flow on Engine 1 or 2

1. Possible Causes

fuel nozzles

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 71-00-00-710-006	Minimum Idle Check
AMM 73-11-40-000-001	Removal of the Fuel Nozzles
AMM 73-11-40-000-002	Removal of the Fuel Nozzle for SAC Engines
AMM 73-11-40-400-001	Installation of the Fuel Nozzles
AMM 73-11-40-400-002	Installation of the Fuel Nozzle for SAC Engines
AMM 74-00-00-710-040	Operational Test of the Ignition System
AMM 74-00-00-710-043	Operational Test of the Ignition System

3. Fault Confirmation
Subtask 74-00-00-710-090-A ** ON A/C NOT FOR ALL

A. Test
Not applicable, the fault is evident.

4. Fault Isolation
Subtask 74-00-00-810-070-A ** ON A/C NOT FOR ALL

A. If the fault symptom is identified by the crew observation: No light off with correct fuel flow:
(1) Do an operational test of the ignition system AMM 74-00-00-710-040.
(2) Replace the fuel nozzles in the igniters area AMM 73-11-40-000-001 AMM 73-11-40-400-001.

Subtask 74-00-00-810-070-B ** ON A/C NOT FOR ALL

A. If the fault symptom is identified by the crew observation: No light off with correct fuel flow:
(1) Do an operational test of the ignition system AMM 74-00-00-710-043.
(2) Replace the fuel nozzles in the igniters area AMM 73-11-40-000-002 AMM 73-11-40-400-002.

Subtask 74-00-00-710-091-A ** ON A/C NOT FOR ALL

B. Do a minimum idle check AMM 71-00-00-710-006.

[Rev.8 from Aug 2018] 2026.04.04 04:36:58 UTC