Installation of the Pylon Overheat Sensing-Elements

TASK 36-22-15-400-804-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: 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	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
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 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 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 36-22-00-710-803-A	Operational Test of the Overheat Detection System
TASK 54-52-11-000-807-A	Removal of the Access Skin Panels
TASK 54-52-11-400-807-A	Installation of the Access Skin Panels
Pylon Overheat Sensing-Elements

3. Job Set-up
Subtask 36-22-15-860-053-A

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 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.
Make sure that a WARNING NOTICE(S) is 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.
Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC system 1(2).

(5) On FLAPS panel 114VU:

Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
Make sure that a WARNING NOTICE(S) is in position 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:

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

(7) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position at the pylon.

Subtask 36-22-15-865-060-A

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

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 36-22-15-010-061-A

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

Subtask 36-22-15-110-057-A

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. Procedure
Subtask 36-22-15-420-053-A

A. Installation of the Overheat Sensing Element
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the grommets (13) on the sensing element (8).
(3) Install the sensing element (8) with the grommets (13) on the support (9).
(4) Put the grommets (13) in the correct position in the clamps (14).
(5) Lock 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) Close the clamps (14) and lock them with the quarter-turn fasteners (12).
(6) Install the nuts (5) and (10) on the sensing elements (8).
(7) TORQUE the nuts (5) and (10) 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 (5) and (10) with the 14QDC1Wire-Locking Dia: 0.5 mm (0.020 inch) CRES -.
(9) Install the support (9) with the sensing element (8) in its housing on the bulkhead.

NOTE: Make sure that there are no pieces of lockwire between the support (9) and its housing.

(10) Install the bolts (6) and the washers (7). Tighten the bolts (6).
(11) Connect the electrical connectors (4) and (11).
(12) TORQUE the electrical connectors (4) and (11) to between 0.68 and 0.57 m.daN (60.18 and 50.44 lbf.in )

.
(13) Installation of the lockwire

(a) Safety the electrical connectors (4) and (11) with the 14QDC1Wire-Locking Dia: 0.5 mm (0.020 inch) CRES -.

Subtask 36-22-15-865-061-A

B. Remove the safety clip(s) and the tag(s) and close 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 36-22-15-710-054-A

C. Operational Test
(1) Do the operational test of the overheat detection system (Ref. AMM TASK 36-22-00-710-803).

5. Close-up
Subtask 36-22-15-410-057-A

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 54-52-11-400-807):
(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
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).

Subtask 36-22-15-862-053-A

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

[Rev.10 from 2021] 2026.04.01 01:16:54 UTC