Removal of the Ventilation Controller

TASK 21-28-34-000-001-A
Removal of the Ventilation Controller

ZONE: 126
FIN: 10HN ** 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
126	LATERAL AVIONIC COMPARTMENT
822

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
Ventilation Controller ** ON A/C NOT FOR ALL
Ventilation Controller ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 21-28-34-861-050-A ** ON A/C NOT FOR ALL

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

Subtask 21-28-34-865-050-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
49VU	AIR COND/FWD CARGO/VENT/CTL & MONG	2HN	C08
** ON A/C NOT FOR ALL
122VU	AIR COND/AFT CARGO VENT/FAN	30HN	S22
** ON A/C NOT FOR ALL
122VU	FWD CARGO VENT AND HTG/FAN	1HN	T22

Subtask 21-28-34-010-050-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position under the lateral avionics compartment door 822.
(2) Open the access door 822.

4. Procedure
Subtask 21-28-34-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Ventilation Controller
(1) Disconnect the electrical connector(s) (3).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the nuts (2).
(4) Remove the ventilation controller (1).

[Rev.10 from 2021] 2026.04.02 06:11:11 UTC