Removal of the Aft Cargo-Compartment Temperature-Sensors

TASK 21-43-15-000-001-A
Removal of the Aft Cargo-Compartment Temperature-Sensors

WARNING: MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE. HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.

FIN: 13HC ** ON A/C NOT FOR ALL
FIN: 14HC ** 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 2M (6 FT)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
FOR [13HC] (AFT CARGO DUCT SENSOR)
No specific	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING
FOR [14HC] (AFT CARGO COMP SENSOR)
No specific	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
826
FOR [13HC] (AFT CARGO DUCT SENSOR)
151EW
151UW
FOR [14HC] (AFT CARGO COMP SENSOR)
161DW

C. 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 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
Temperature Sensors - Aft Cargo Compartment ** ON A/C NOT FOR ALL
Temperature Sensors - Aft Cargo Compartment ** ON A/C NOT FOR ALL
FOR [13HC] (AFT CARGO DUCT SENSOR)
TASK 25-55-11-000-003-A	Removal of the Sidewall Panels in the Aft Cargo Compartment - FR47/FR59
FOR [14HC] (AFT CARGO COMP SENSOR)
TASK 25-55-11-000-003-A	Removal of the Sidewall Panels in the Aft Cargo Compartment - FR47/FR59

3. Job Set-up
Subtask 21-43-15-861-051-A ** ON A/C NOT FOR ALL

A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 21-43-15-865-050-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/AFT CARGO/VENT/CTL & MONG	31HN	C07
** ON A/C NOT FOR ALL
49VU	AIR COND/AFT CARGO/VENT & HTG/CTL & MONG	31HN	C07
** ON A/C NOT FOR ALL
122VU	AIR COND/AFT CARGO VENT/FAN	30HN	S22

Subtask 21-43-15-865-059-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/AFT CARGO/VENT/CTL & MONG	31HN	C07
** ON A/C NOT FOR ALL
49VU	AIR COND/AFT CARGO/VENT & HTG/CTL & MONG	31HN	C07
** ON A/C NOT FOR ALL
122VU	AIR COND/AFT CARGO VENT/FAN	30HN	S22

Subtask 21-43-15-941-050-C ** ON A/C NOT FOR ALL

D. Safety Precautions
(1) On the panel 30VU:
(a) Make sure that:

the APU BLEED pushbutton switch is in the off position (the ON legend is off) and,
the ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are in the off position (the OFF legends are on).

(b) Put a warning notice in position to tell persons not to operate these pushbutton switches.
(2) On the HP and the LP ground connectors put a warning notice in position to tell persons not to supply the ground air.

Subtask 21-43-15-010-050-C ** ON A/C NOT FOR ALL

E. Get Access
(1) Open the AFT cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position at the AFT cargo-compartment door 826.
(3) Remove the access panel:
(a) FOR [13HC] (AFT CARGO DUCT SENSOR)

151EW (Ref. AMM TASK 25-55-11-000-003).

(b) FOR [14HC] (AFT CARGO COMP SENSOR)

161DW (Ref. AMM TASK 25-55-11-000-003).

Subtask 21-43-15-010-050-D ** ON A/C NOT FOR ALL

151UW (Ref. AMM TASK 25-55-11-000-003).

(b) FOR [14HC] (AFT CARGO COMP SENSOR)

161DW (Ref. AMM TASK 25-55-11-000-003).

4. Procedure
Subtask 21-43-15-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Temperature Sensors
(1) FOR [13HC] (AFT CARGO DUCT SENSOR)
(a) Disconnect the electrical connector (1).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Remove and discard the locking wire from the temperature sensor (2).
(d) Remove the temperature sensor (2) and the O-ring (3).
(e) Put the PLUG-BLANKING in each disconnected line end.
(2) FOR [14HC] (AFT CARGO COMP SENSOR)
(a) Disconnect the electrical connector (5).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Remove and discard the locking wire from the temperature sensor (6).
(d) Remove the temperature sensor (6) and the O-ring (7).
(e) Put the PLUG-BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.02 06:48:20 UTC