Removal of the Fuselage Overheat Sensing-Elements (Loop A and B)

TASK 36-22-18-000-001-A
Removal of the Fuselage Overheat Sensing-Elements (Loop A and B)

FIN: 30HF
FIN: 31HF
FIN: 32HF
FIN: 33HF
FIN: 34HF
FIN: 35HF
FIN: 36HF
FIN: 47HF
FIN: 48HF
FIN: 57HF
FIN: 58HF
FIN: 59HF
FIN: 60HF
FIN: 61HF
FIN: 62HF
FIN: 63HF
FIN: 73HF
FIN: 74HF
FIN: 75HF
FIN: 76HF
FIN: 78HF
FIN: 79HF

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 3M (10 FT)- ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
147AB, 147EB, 147FB, 151BW, 151CW, 191BB, 191EB, 191JB, 192EB, 192FB, 192KB, 196AB
151RW, 197KB
197BB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 25-55-11-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR47
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
Fuselage Overheat Sensing Elements (Loop A and B) 31HF-36HF, 47HF, 58HF-63HF, 73HF-75HF, 78HF, 79HF

3. Job Set-up
Subtask 36-22-18-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
** ON A/C ALL
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22
** ON A/C ALL
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
** ON A/C NOT FOR ALL
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 36-22-18-860-050-A

B. Aircraft Maintenance Configuration
(1) Put the WARNING NOTICE(S) in position:

in the cockpit on the Engine Control Panel 115VU to tell persons not to start the engine(s)
in the cockpit on the AIR COND Overhead Control Panel 30VU to tell persons not to push in the APU BLEED pushbutton switch
on the HP ground connector to tell persons not to pressurize the pneumatic system.

(2) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the related access panel.

Subtask 36-22-18-010-050-A ** ON A/C NOT FOR ALL

C. Get Access

NOTE: To remove the necessary overheat sensing elements, remove only the related access panels.

(1) Get access to the overheat sensing elements between FR35 and FR36:
(a) Remove the access panels 191BB and 191EB.
(2) Get access to the overheat sensing elements between FR36 and FR42 LH:
(a) Remove the access panel 191JB.
(3) Get access to the overheat sensing elements between FR34 and FR42 RH:
(a) Remove the access panels 192EB, 192FB, 192KB and 196AB.
(4) Get access to the overheat sensing elements between FR42 and FR50:
(a) Remove the access panels 147AB, 147EB, 147FB and 197BB.
(5) Get access to the overheat sensing elements between FR46 and FR49 from the AFT cargo compartment:
(a) Open the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
(b) Remove the applicable access panels for the overheat sensing elements:

between the FR46 and FR47
remove the partition panel 151BW (Ref. AMM TASK 25-55-11-000-001)
between the FR47 and FR49
remove the access panel 151CW.

Subtask 36-22-18-010-050-C ** ON A/C NOT FOR ALL

C. Get Access

NOTE: To remove the necessary overheat sensing-elements, remove only the related access panels.

(1) Get access to the overheat sensing-elements between FR35 and FR36:
(a) Remove the access panels 191BB and 191EB.
(2) Get access to the overheat sensing-elements between FR36 and FR42 LH:
(a) Remove the access panel 191JB.
(3) Get access to the overheat sensing-elements between FR34 and FR42 RH:
(a) Remove the access panels 192EB, 192FB, 192KB and 196AB.
(4) Get access to the overheat sensing-elements between FR42 and FR50:
(a) Remove the access panels 147AB, 147EB, 147FB and 197KB.
(5) Get access to the overheat sensing elements between FR46 and FR49 from the aft cargo compartment:
(a) Open the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
(b) Remove the applicable access panels for the overheat sensing elements:

Between FR46 and FR47
remove the partition panel 151BW (Ref. AMM TASK 25-55-11-000-001).
Between FR47 and FR47.4
remove the access panel 151RW.
Between FR47.4 and FR49
remove the access panel 151CW.

4. Procedure
Subtask 36-22-18-020-050-A

CAUTION: REMOVE OR INSTALL THE SENSING ELEMENTS CAREFULLY. DO NOT TWIST, BEND OR CAUSE KINKS IN THE SENSING ELEMENTS. IF YOU DO, YOU CAN CAUSE DAMAGE TO THEM.

A. Removal of the Overheat Sensing Elements

NOTE: The removal procedure for all sensing elements of the leak detection system (double loop 125 degree C) is the same.

(1) Cut and remove the lockwire from the union nut (1) and the bracket (5).
(2) Loosen the union nut (1).
(3) Cut and remove the lockwire from the retaining nut (2).
(4) Remove and retain the retaining nut (2) and the washer (3).
(5) Secure the sensing element to the bracket (5).
(6) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(7) Put the CAP - BLANKING on the socket (4).
(8) Loosen the camloc (6) and open the clamp (7).
(9) Remove the sensing element with the attached grommet (8).
(10) Remove the grommet (8) from the sensing element and retain.

[Rev.10 from 2021] 2026.04.01 01:17:26 UTC