Engine 2 Pylon Loop B Inoperative

TASK 36-11-00-810-A03-A
Engine 2 Pylon Loop B Inoperative

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 36-11-00-740-803	Bite Test of the BMC
AMM 36-11-52-000-802	Removal of the Bleed Pressure-Regulator Valve
AMM 36-11-52-400-802	Installation of the Bleed Pressure-Regulator Valve
ASM 362202

3. Fault Confirmation
Subtask 36-11-00-740-103-A ** ON A/C NOT FOR ALL

A. Test
(1) Do a Bite test of the BMC2 AMM 36-11-00-740-803.

4. Fault Isolation
Subtask 36-11-00-810-410-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message ENG2 PYLON LOOP B INOP:

Remove the BMC-2 [1HA2] AMM 36-11-52-000-802.
Do a continuity check of the RH Pylon loop B from pin AA/4D of the BMC2 to pin AA/5D of the BMC2 ASM 362202.

NOTE: This procedure is related to the loss of the Pylon-loop B detection signal or to incorrect continuity of the loop.

(1) If there is continuity:

(a) If there is no ground signal:

(b) If there is a ground signal:

1 If the fault continues:

Do a check and clean all the connections to remove contamination and decrease the resistance of the loop ASM 362202.

(2) If there is no continuity:

Do a check of the wiring from pin AA/4D of the BMC2 to the cable (102HF2) and from pin AA/5D of the BMC2 to the cable (103HF2) ASM 362202.

(a) If there is no continuity:

(b) If there is continuity:

1 If a sensing element is damaged:

2 If no sensing element is damaged:

a If there is no continuity on a sensing element:

b If there is continuity on a sensing element:

Do a check and repair the wiring from the connector AA/4D to the sensing element (101HF2) ASM 362202.
Do a check and repair the wiring from the sensing element (106HF2) to the connector AA/5D ASM 362202.
Install the BMC-2 [1HA2] AMM 36-11-52-400-802.

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

[Rev.8 from Aug 2018] 2026.04.04 04:33:54 UTC