Installation of the NAV-Aircraft Identification Module (NAIM)

TASK 25-65-35-400-005-A
Installation of the NAV-Aircraft Identification Module (NAIM)

ZONE: 200
FIN: 144MX ** 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	STEPLADDER 1.0 M (3.3 FT)
No specific	Torque wrench: range to between 0.45 and 0.35 m.daN (39.82 and 30.97 lbf.in )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE
261BC

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 25-23-42-000-002-A	Removal of the Ceiling Panels - Aft Utility Area
TASK 25-23-42-400-002-A	Installation of the Ceiling Panels - Aft Utility Area
TASK 25-65-00-740-001-A	Emergency Locator Transmitter (ELT) System - BITE Test
TASK 25-65-00-840-001-A	Procedure after a Change of Aircraft Registration Number
ELT 110MX
NAIM 144MX

3. Job Set-up
Subtask 25-65-35-860-055-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration

ELT 110MX ** ON A/C NOT FOR ALL

(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that a STEPLADDER 1.0 M (3.3 FT) is in position and the applicable ceiling panel is removed (Ref. AMM TASK 25-23-42-000-002):

For aircraft with a one-panel ceiling 261BC.

Subtask 25-65-35-865-051-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	ELT/NAV&A/C/IDENT	114MX	R14

4. Procedure
Subtask 25-65-35-560-055-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) If the aircraft registration code/number (ICAO) is changed refer to (Ref. AMM TASK 25-65-00-840-001).

Subtask 25-65-35-420-056-A ** ON A/C NOT FOR ALL

B. Installation of the NAIM 144MX

NAIM 144MX ** ON A/C NOT FOR ALL

(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the ARM/OFF/TX switch (8) is set to the OFF position.
(4) Carefully connect the NAIM (6) to the ELT (7) and hold it in position on the support (1).
(5) Install the bolts (4), the washers (3) and the nuts (2).
(6) TORQUE the bolts (4) to between 0.45 and 0.35 m.daN (39.82 and 30.97 lbf.in )

.
(7) Remove the CAP-BLANKING from each electrical connector and receptacle.
(8) Make sure that all the electrical connections are clean and in the correct condition.
(9) Connect electrical connector 144MX-A (5) to the NAIM (6).
(10) Set the ARM/OFF/TX switch (8) to the ARM position.

Subtask 25-65-35-865-052-A ** ON A/C NOT FOR ALL

C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	ELT/NAV&A/C/IDENT	114MX	R14

Subtask 25-65-35-740-054-A ** ON A/C NOT FOR ALL

D. Do the BITE test (Ref. AMM TASK 25-65-00-740-001).

5. Close-up
Subtask 25-65-35-410-054-A ** ON A/C NOT FOR ALL

A. Close Access

NAIM 144MX ** ON A/C NOT FOR ALL

(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable ceiling panel (Ref. AMM TASK 25-23-42-400-002):

For aircraft with a one-panel ceiling 261BC.

(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

Subtask 25-65-35-862-054-A ** ON A/C NOT FOR ALL

B. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.03.31 23:41:26 UTC