Removal of the Electronic Control Box (ECB) (APS 3200)

TASK 49-61-34-000-002-A
Removal of the Electronic Control Box (ECB) (APS 3200)

FIN: 59KD ** 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	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
162EW

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 25-55-12-000-003-A	Removal of the Sidewall Panels in the Aft Cargo Compartment - FR59/FR65
TASK 31-36-00-740-015-A	Printout of the Engine/APU Hours and Cycles Stored in the Flight Data Interface and Management Unit (FDIMU)
TASK 52-30-00-860-006-A	Open the Bulk Cargo-Compartment Door
ECB - Removal/Installation

3. Job Set-up
Subtask 49-61-34-860-051-C ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration.
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Put a warning notice in the cockpit to tell persons not to start the APU.
(3) Do a record of the APU HOURS and CYCLES (Ref. AMM TASK 31-36-00-740-015).

Subtask 49-61-34-865-058-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
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

Subtask 49-61-34-010-056-B ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the BULK cargo-compartment door 827 (Ref. AMM TASK 52-30-00-860-006).
(2) Put the ACCESS PLATFORM 2M (6 FT) at the BULK cargo-compartment door 827.
(3) Remove the access panel 162EW (Ref. AMM TASK 25-55-12-000-003).

4. Procedure
Subtask 49-61-34-020-051-A ** ON A/C NOT FOR ALL

A. Remove the ECB

WARNING: SUPPORT THE UNIT/ASSEMBLY. THE UNIT/ASSEMBLY IS HEAVY. IF YOU DO NOT SUPPORT IT, IT WILL FALL. THIS CAN CAUSE INJURY TO PERSONS, AND/OR DAMAGE TO EQUIPMENT.

(1) At the ECB tray (1) turn the fluted knobs (2) counterclockwise to release the electronic control box (3).

NOTE: The ECB installation points forward in those aircraft that do not have the optional bulk cargo door. Aircraft with the optional bulk cargo door, have the ECB installation pointed rearwards.

(2) Carefully pull the ECB (3) from the tray (1) to disconnect the electrical connection (4).
(3) Remove the ECB (3) from the tray (1).
(4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

[Rev.10 from 2021] 2026.04.01 04:41:58 UTC