Engine 1 Pylon Leak

TASK 36-22-00-810-842-A
Engine 1 Pylon Leak

1. Possible Causes

duct

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 36-22-00-810-880-A	Leak Detection of the Engine 1 Pylon Loop A
TSM TASK 36-22-00-810-884-A	Leak Detection of the Engine 1 Pylon Loop B
AMM 36-11-00-740-802	BITE Test of the Engine Bleed Air System (EBAS) (System Test)
AMM 36-11-48-790-802	Leak Check on Bleed Air Ducting in Wing Area between Bleed Air Precooler Wing Anti Ice Valve and Wing/Fuselage Connection
AMM 36-22-00-790-802	Leak Check on all the Bleed Air Ducts and Packs Components

3. Fault Confirmation
Subtask 36-22-00-740-058-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the BITE test of the EBAS AMM 36-11-00-740-802.

4. Fault Isolation
Subtask 36-22-00-810-104-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message ENG1 PYLON LEAK:
(1) Do a visual inspection of the duct of the bleed air system in LH Pylon AMM 36-22-00-790-802 AMM 36-11-48-790-802.
(a) If the duct is damaged:

Repair or replace the duct .

(2) Do the test given in Para. 3.

Subtask 36-22-00-810-105-A ** ON A/C NOT FOR ALL

B. If the fault continues:
(1) Do a check of the insulation of:

Loop A (Ref. TSM TASK 36-22-00-810-880)
Loop B (Ref. TSM TASK 36-22-00-810-884).

(2) After the subsequent flight, make sure that the fault does not continue.

[Rev.8 from Aug 2018] 2026.04.04 04:34:08 UTC