Detailed Inspection of the Pylon Overheat Sensing-Element

TASK 36-22-15-200-002-A
Detailed Inspection of the Pylon Overheat Sensing-Element

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: BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

WARNING: DO NOT TOUCH THE COMPONENT UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS.

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	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1HF1] (SNSG ELEM-OVHT, ENG 1 PYLON)
413DT, 471AL, 471AR
413CL, 413DL, 414CR, 414FR
FOR [1HF2] (SNSG ELEM-OVHT, ENG 2 PYLON)
423DT, 481AL, 481AR
423CL, 423DL, 423FL, 424CR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
Permitted Tolerances of the Sensing Elements
FOR [1HF1] (SNSG ELEM-OVHT, ENG 1 PYLON)
TASK 54-53-11-000-002-B	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-002-B	Installation of the Pylon-to-Wing Access Panels
FOR [1HF2] (SNSG ELEM-OVHT, ENG 2 PYLON)
TASK 54-53-11-000-002-B	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-002-B	Installation of the Pylon-to-Wing Access Panels

3. Job Set-up
Subtask 36-22-15-941-052-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(2) Put a WARNING NOTICE(S) in position to tell persons not to energize the aircraft electrical circuits.
(3) On the HP ground connector:

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

Subtask 36-22-15-010-053-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position at the pylon access panels.
(2) Remove these access panels:
(a) FOR [1HF1] (SNSG ELEM-OVHT, ENG 1 PYLON)
413CL 414CR 413DL 414FR
(b) FOR [1HF2] (SNSG ELEM-OVHT, ENG 2 PYLON)
423CL 424CR 423DL 423FL.

Subtask 36-22-15-010-053-B ** ON A/C NOT FOR ALL

B. Get Access
(1) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position at the pylon access panels.
(2) Remove these access panels:
(a) FOR [1HF1] (SNSG ELEM-OVHT, ENG 1 PYLON)
471AR 413DT

471AL (Ref. AMM TASK 54-53-11-000-002)

(b) FOR [1HF2] (SNSG ELEM-OVHT, ENG 2 PYLON)
481AL 423DT

481AR (Ref. AMM TASK 54-53-11-000-002).

4. Procedure
Subtask 36-22-15-210-051-A ** ON A/C NOT FOR ALL

A. Inspection of the Pylon Overheat Sensing-Elements
(1) Make sure that the clearance between the sensing elements and the duct is a minimum of 12.7 MM (0.50 IN.) 12.7 mm (0.50 in.), measured along the full length of the sensing element.
(2) Do an inspection of the sensing elements to make sure that they are installed on the outer side of the insulation.
(3) Make sure that the clearance between the sensing elements and the duct insulation is the same as at the mounting brackets.
(4) Make sure that the sensing elements are installed in the permitted tolerances.
(5) Make sure that each clamp has a silicon rubber grommet.
(6) Make sure that each mounting bracket, installed on the duct, has a spacer.
(7) Make sure that the sensing elements are installed correctly.
(8) Make sure that each mounting clamp is in the correct condition and has no corrosion.
(9) Make sure that the bonding straps are correctly attached (Ref. AMM TASK 20-28-00-912-802).
(10) Make sure that the lockwires are correctly installed on the connections of the sensing elements.
(11) Make sure that the duct insulation is in the correct condition and correctly installed.
(12) Make sure that the sensing elements have no cracks, nicks, sharp edges, bonds chafing or corrosion.

5. Close-up
Subtask 36-22-15-410-052-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:
(a) FOR [1HF1] (SNSG ELEM-OVHT, ENG 1 PYLON)
413CL 414CR 413DL 414FR
(b) FOR [1HF2] (SNSG ELEM-OVHT, ENG 2 PYLON)
423CL 424CR 423DL 423FL.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).

Subtask 36-22-15-410-052-B ** 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:
(a) FOR [1HF1] (SNSG ELEM-OVHT, ENG 1 PYLON)
471AR 413DT

471AL (Ref. AMM TASK 54-53-11-400-002)

(b) FOR [1HF2] (SNSG ELEM-OVHT, ENG 2 PYLON)
481AL 423DT

481AR (Ref. AMM TASK 54-53-11-400-002).

(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 01:16:57 UTC