Removal of the Radio Altimeter-Transceiver Fan

TASK 34-42-45-000-001-A
Removal of the Radio Altimeter-Transceiver Fan

ZONE: 152
FIN: 3SA1
FIN: 3SA2

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	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
152	AFT CARGO COMPARTMENT
152HW, 826

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
Radio Altimeter-Transceiver Fan

3. Job Set-up
Subtask 34-42-45-861-050-A

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

Subtask 34-42-45-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 3SA1 (FANRA XCVR1)
121VU	COM NAV/RAD ALTM/1	1SA1	K11
FOR FIN: 3SA2 (FANRA XCVR2)
121VU	COM NAV/RAD ALTM/2	1SA2	K12

Subtask 34-42-45-010-050-A

C. Get Access
(1) Open the AFT Cargo Door 826 (Ref. AMM TASK 52-30-00-860-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) at the aft cargo door 826.
(3) Remove the access panel 152HW.

4. Procedure
Subtask 34-42-45-020-052-B

A. Removal of the Radio Altimeter-Transceiver Fan

NOTE: The procedure is the same for radio altimeter-transceiver fans 3SA1 and 3SA2.

(1) Disconnect the electrical connector (9).
(2) Remove the screws (3), the washers (2) and remove the plate (1).
(3) Remove the bolts (12), the washers (11) and remove the cool-air inlet (6).
(4) Remove the cable ties.
(5) Disconnect the electrical connections (10).
(6) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(7) Remove the bolts (8), washers (5) and nuts (4).
(8) Remove the blower (7).

[Rev.10 from 2021] 2026.04.02 07:15:10 UTC