Removal of the Pylon Overheat Sensing-Elements

TASK 36-22-15-000-804-A
Removal of the Pylon Overheat Sensing-Elements

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

WARNING: YOU MUST NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY.

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 413
ZONE: 414
ZONE: 423
ZONE: 424
FIN: 106HF1
FIN: 106HF2
FIN: 6HF1
FIN: 6HF2

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	1	BRUSH - BRISTLED, SOFT
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BBB1)	Non Aqueous Cleaner-- Petroleum Based -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
413	UPPER FWD PYLON
414	UPPER FWD PYLON
423	UPPER FWD PYLON
424	UPPER FWD PYLON
191DB
FOR [106HF1] (SENSING ELEMENT-OVHT, L PYLON LOOP B)
FOR [6HF1] (SENSING ELEMENT-OVHT, L PYLON LOOP A)
413BT, 414AR
FOR [106HF2] (SENSING ELEMENT-OVHT, R PYLON LOOP B)
FOR [6HF2] (SENSING ELEMENT-OVHT, R PYLON LOOP A)
423BT, 424AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 54-52-11-000-807-A	Removal of the Access Skin Panels
Pylon Overheat Sensing-Elements

3. Job Set-up
Subtask 36-22-15-861-053-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002)

Subtask 36-22-15-941-057-A

B. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(2) On AIR COND panel 30VU:

Make sure that the ENG 1(2) BLEED pushbutton switch is released (OFF legend on).
Make sure that the APU BLEED pushbutton switch is released (ON legend off).
Put a WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.

(3) On the center pedestal, on ENG panel 115VU:

Make sure that the ENG/MODE selector switch is in the NORM position.
Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.

(4) On the ENG section of maintenance panel 50VU:

Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC system 1(2).

(5) On FLAPS panel 114VU:

Put the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
Put a WARNING NOTICE(S) on the flap/slat control lever to tell persons not to operate the flap/slat controls.

(6) On the access door 191DB, on the HP ground connector:

Put a WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.

Subtask 36-22-15-865-059-A

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 106HF1 (SENSING ELEMENTOVHT, L PYLON LOOP B) FOR FIN: 6HF1 (SENSING ELEMENTOVHT, L PYLON LOOP A)
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
FOR FIN: 106HF2 (SENSING ELEMENTOVHT, R PYLON LOOP B) FOR FIN: 6HF2 (SENSING ELEMENTOVHT, R PYLON LOOP A)
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 36-22-15-010-060-A

D. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE at the pylon.
(2) Remove these access panels (Ref. AMM TASK 54-52-11-000-807):
(a) FOR [6HF1] (SENSING ELEMENT-OVHT, L PYLON LOOP A), [106HF1] (SENSING ELEMENT-OVHT, L PYLON LOOP B)
413BT 414AR
(b) FOR [6HF2] (SENSING ELEMENT-OVHT, R PYLON LOOP A), [106HF2] (SENSING ELEMENT-OVHT, R PYLON LOOP B)
423BT 424AR

4. Procedure
Subtask 36-22-15-020-053-A

A. Removal of the Overheat Sensing Element
(1) Removal of the lockwire

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(a) Cut and remove the lockwire from the electrical connectors (4) and (11).
(2) Disconnect the electrical connectors (4) and (11).
(3) Remove the screws (6) and the washers (7).
(4) Remove the support (9) that holds the sensing element (8).
(5) Removal of the lockwire

(a) Cut and remove the lockwire from the nuts (5) and (10).
(6) Remove the nuts (5) and (10).
(7) Open the clamps (14)

CAUTION: DO NOT USE ELECTRICAL OR PNEUMATIC TOOLS TO LOOSEN OR TIGHTEN THE QUARTER-TURN FASTENER ON THE FIRE DETECTOR CLAMP. ONLY USE A MANUAL SCREWDRIVER. ELECTRICAL OR PNEUMATIC TOOLS WILL CAUSE THE FASTENER TO TURN TOO MUCH AND POSSIBLY TO BREAK.

(a) Turn the quarter-turn fasteners (12) by one quarter of a turn and open the clamps (14).
(8) Remove the sensing element (8).

NOTE: The grommets (13) are installed on the sensing element (8).

(9) Remove the grommets (13) from the sensing element (8).
(10) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

Subtask 36-22-15-110-056-A

B. Cleaning of the Outer Side of the Connectors
(1) Remove all the collected oil, grease and dirt from the outer side of each connector. To do this, use a BRUSH - BRISTLED, SOFT with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) . Dry with a Textile-Lint free Cotton - (Material No.14SBA1) .

[Rev.10 from 2021] 2026.04.01 01:16:53 UTC