Fuel Leak at the Engine 1 Drain Mast During an Engine Start in Case of Extreme Cold Condition (OAT less than -20 deg.C)

TASK 71-00-00-810-803-A
Fuel Leak at the Engine 1 Drain Mast During an Engine Start in Case of Extreme Cold Condition (OAT less than -20 deg.C)

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 71-00-00-790-002	Fuel or Hydraulic or Oil Leakage Limits

3. Fault Confirmation
Subtask 71-00-00-710-053-A ** ON A/C NOT FOR ALL

A. Not applicable.

4. Fault Isolation
Subtask 71-00-00-810-053-A ** ON A/C NOT FOR ALL

A. If the fault symptom is identified by the crew observation fuel leak at the drain mast during an engine start (OAT less than -20 deg.C):

do the maintenance procedure (Static fuel leaks in case of extreme cold condition) AMM 71-00-00-790-002.

NOTE: In case of extreme cold weather condition (OAT < -20 deg.C (-4.00 deg.F)), fuel leaks from the drain may occur and should not be considered as abnormal. Therefore, check for fuel leaks at the drain mast shall be performed with the engine fully stabilized at idle.

[Rev.8 from Aug 2018] 2026.04.04 04:34:56 UTC