Installation of the Pylon Overheat Sensing-Elements

TASK 36-22-15-400-802-A
Installation 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	1	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	1	GUN - SPRAY
No specific	1	NITROGEN 1.7 TO 2 BAR (25 TO 30 PSI)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.68 and 0.57 m.daN (60.18 and 50.44 lbf.in )
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BGB1)	Non Aqueous Cleaner-Sensing element - Xylene based -
(Material No.14QDC1)	Wire-Locking Dia: 0.5 mm (0.020 inch) CRES -

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 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 36-22-00-710-802-A	Operational Test of the Overheat Detection System
TASK 54-52-11-000-805-A	Removal of the Access Skin Panels
TASK 54-52-11-400-805-A	Installation 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 36-22-15-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(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).
Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the pneumatic system.

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

Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.

(4) Make sure that you did 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.

(6) Make sure that the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE is in position at the pylon.

Subtask 36-22-15-865-054-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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 36-22-15-010-055-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that these access panels are removed (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

Subtask 36-22-15-110-053-A ** ON A/C NOT FOR ALL

D. Cleaning
(1) Remove the CAP-BLANKING from each electrical connector and receptacle.
(2) Apply the Non Aqueous Cleaner-Sensing element - Xylene based - (Material No.08BGB1) with a GUN - SPRAY:

On the end fittings of the sensing elements, of the cable assemblies and of all other connectors
Into the receptacles of the connectors, where necessary, to clean them.

NOTE: Do not use probes, swabs or any other instruments to examine the ends of the connectors when you clean them.

(3) Dry all parts of the sensing elements.

WARNING: DO NOT EXCEED 30PSIG (2,1KG/CM2) OF PRESSURE AT THE NOZZLE WHEN USING COMPRESSED AIR OR NITROGEN IN THIS CLEANING PROCESS. ALSO WEAR STURDY GOGGLES OR A FACE SHIELD. PARTICLES OR LIQUID DROPLETS PROPELLED BY HIGH PRESURE CAN CAUSE PERMANENT EYE INJURY.

(a) Dry all the components with a NITROGEN 1.7 TO 2 BAR (25 TO 30 PSI) at a pressure of not more than 2.1 bar (30.46 psi).
(4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

4. Procedure
Subtask 36-22-15-420-051-B ** ON A/C NOT FOR ALL

A. Installation of the Overheat Sensing Element
(1) Remove the CAP-BLANKING from each electrical connector and receptacle.
(2) Install the grommets (16) on the sensing element (12).
(3) Install the sensing element (12) with the grommets (16) on the support (9).
(4) Put the grommets (16) in the correct position in the clamps (17).
(5) Lock the clamps (17) with the bolts (15).
(6) Install the nuts (4) and (8) on the sensing elements (12).
(7) TORQUE the nuts (4) and (8) to between 0.68 and 0.57 m.daN (60.18 and 50.44 lbf.in )

.
(8) Installation 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) Safety the nuts (4) and (8) with the 14QDC1Wire-Locking Dia: 0.5 mm (0.020 inch) CRES -.
(9) Install the support (9) with the sensing element (12) in its housing on the bulkhead.
(10) Install the screw (11), the washer (10) and the nut (6).
(11) Install the screws (13) and the washers (14).
(12) Tighten the screws (11) and (13).
(13) Install the chimney (1) on the bulkhead with the screws (3) and the washers (2).
(14) Connect the electrical connectors (5) and (7).
(15) TORQUE the electrical connectors to between 0.68 and 0.57 m.daN (60.18 and 50.44 lbf.in )

.
(16) Installation of the lockwire

(a) Safety the electrical connectors (5) and (7) with the 14QDC1Wire-Locking Dia: 0.5 mm (0.020 inch) CRES -.

Subtask 36-22-15-865-055-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close 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 36-22-15-710-051-A ** ON A/C NOT FOR ALL

C. Operational Test
(1) Do the operational test of the overheat detection system (Ref. AMM TASK 36-22-00-710-802).

5. Close-up
Subtask 36-22-15-410-053-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install these access panels (Ref. AMM TASK 54-52-11-400-805):
(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
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).

Subtask 36-22-15-862-051-A ** ON A/C NOT FOR ALL

B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 12:38:41 UTC