Removal of the Avionics Ventilation Duct Temperature Sensors

TASK 21-26-12-000-001-B
Removal of the Avionics Ventilation Duct Temperature Sensors

FIN: 26HQ ** ON A/C NOT FOR ALL
FIN: 32HQ ** 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	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
824

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
Duct Temperature Sensors

3. Job Set-up
Subtask 21-26-12-861-052-A ** ON A/C NOT FOR ALL

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 21-26-12-865-053-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/AVNCS VENT/CTL	6HQ	D06
49VU	AIR COND/AVNCS VENT/CTL	5HQ	D05
122VU	AIR COND/AVNCS/VENT/MONG	3HQ	Y17
123VU	AVNCS VENT/BLOWER/FAN	1HQ	AD10
123VU	AVNCS VENT/EXTC/FAN	2HQ	AE02

Subtask 21-26-12-010-052-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 824.
(2) Open the access door 824.

4. Procedure
Subtask 21-26-12-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the Duct Temperature Sensors

Duct Temperature Sensors ** ON A/C NOT FOR ALL

(1) Disconnect the electrical connectors (1).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Cut and discard the lockwire.
(4) Remove the sensors (2) and discard the O-rings (3).

[Rev.9 from 2019] 2026.04.02 06:11:02 UTC