Detailed Inspection of the Pylon Overheat Sensing-Element

TASK 36-22-15-200-802-A
Detailed Inspection of the Pylon Overheat Sensing-Element

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)
413CL, 413DL, 414CR, 414FR
FOR [1HF2] (SNSG ELEM-OVHT, ENG 2 PYLON)
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

3. Job Set-up
Subtask 36-22-15-941-055-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 36-22-15-010-058-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.

4. Procedure
Subtask 36-22-15-210-052-A ** ON A/C NOT FOR ALL

A. Inspection of the Overheat Sensing Elements
(1) Make sure that the clearance between the sensing elements and the duct is approximately 12.7 mm (0.5000 in.) minimum, measured over the full length of the sensing element.
(2) Do an inspection of the elements to make sure that they are installed outside of the insulation.
(3) Make sure that the clearance between the elements and the duct insulation is the same as at the mounting brackets.
(4) Make sure that the sensing elements are installed to the permitted tolerance.
(5) Make sure that each clamp has a silicon rubber grommet.
(6) Make sure that each mounting bracket that is installed directly to the duct has a spacer.
(7) Make sure that the elements are installed correctly.
(8) Make sure that each mounting and clamp is not damaged and has no corrosion.
(9) Make sure that the bonding straps are correctly installed (Ref. AMM TASK 20-28-00-912-802).
(10) Make sure that the lockwires are correctly installed on the connection of the sensing elements.
(11) Make sure that the duct insulation is not damaged and correctly installed.
(12) Make sure that the sensing elements have no cracks, nicks, sharp edges, bonds chaffing or corrosion.

5. Close-up
Subtask 36-22-15-410-055-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).

[Rev.10 from 2021] 2026.04.01 01:16:58 UTC