Removal of the Pylon Overheat Sensing-Elements

TASK 36-22-15-000-802-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: ALWAYS USE APPLICABLE GLOVES TO TOUCH HOT PARTS. HOT PARTS CAN CAUSE INJURY TO PERSONS.

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: 423
FIN: 106HF1 ** ON A/C NOT FOR ALL
FIN: 106HF2 ** ON A/C NOT FOR ALL
FIN: 6HF1 ** ON A/C NOT FOR ALL
FIN: 6HF2 ** ON A/C NOT FOR ALL

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

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 5M (16 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
423	UPPER FWD PYLON
191DB
FOR [106HF1] (SENSING ELEMENT-OVHT, L PYLON LOOP B)
FOR [6HF1] (SENSING ELEMENT-OVHT, L PYLON LOOP A)
413BT, 413CT
FOR [106HF2] (SENSING ELEMENT-OVHT, R PYLON LOOP B)
FOR [6HF2] (SENSING ELEMENT-OVHT, R PYLON LOOP A)
423BT, 423CT

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 54-52-11-000-805-A	Removal of the Access Skin Panels
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
Pylon Overheat Sensing-Elements

3. Job Set-up
Subtask 36-22-15-861-051-A ** ON A/C NOT FOR ALL

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

Subtask 36-22-15-941-053-A ** ON A/C NOT FOR ALL

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 access door 191DB, on the HP ground connector:

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

(4) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(5) On FLAPS panel 114VU:

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

Subtask 36-22-15-865-053-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR 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 36-22-15-010-054-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Put an ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position at the pylon.
(2) Remove these access panels (Ref. AMM TASK 54-52-11-000-805):
(a) FOR [6HF1] (SENSING ELEMENT-OVHT, L PYLON LOOP A), [106HF1] (SENSING ELEMENT-OVHT, L PYLON LOOP B)
413BT 413CT
(b) FOR [6HF2] (SENSING ELEMENT-OVHT, R PYLON LOOP A), [106HF2] (SENSING ELEMENT-OVHT, R PYLON LOOP B)
423BT 423CT

4. Procedure
Subtask 36-22-15-020-051-B ** ON A/C NOT FOR ALL

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 (5) and (7).
(2) Disconnect the electrical connectors (5) and (7).
(3) Remove the screws (3) and the washers (2) that attach the chimney (1) to the bulkhead.
(4) Remove the chimney (1).
(5) Remove the screw (11), the washer (10) and the nut (6).
(6) Remove the screws (13) and the washers (14).
(7) Remove the support (9) that holds the sensing element (12).
(8) Removal of the lockwire

(a) Cut and remove the lockwire from the nuts (4) and (8).
(9) Remove the nuts (4) and (8).
(10) Loosen the bolts (15) and open the clamps (17).
(11) Remove the sensing element (12).

NOTE: The grommets (16) are installed on the sensing element (12).

(12) Remove the grommets (16) from the sensing element (12).
(13) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

Subtask 36-22-15-110-052-A ** ON A/C NOT FOR ALL

B. Cleaning of the Outer Side of the Connectors

Pylon Overheat Sensing-Elements ** ON A/C NOT FOR ALL

(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 12:38:41 UTC