Removal of the On-Board Airport Navigation Computer (OANC) Mass-Memory Card

TASK 34-38-34-000-802-A
Removal of the On-Board Airport Navigation Computer (OANC) Mass-Memory Card

ZONE: 121

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) - ADJUSTABLE
No specific	1	BAG - ANTISTATIC
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
121	AVIONICS COMPARTMENT
811

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
OANC Mass-Memory Card

3. Job Set-up
Subtask 34-38-34-860-052-A ** ON A/C NOT FOR ALL

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

Subtask 34-38-34-865-053-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
121VU	OANS CMPTR	2FX	L10

Subtask 34-38-34-010-052-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
(2) Open access door 811.

4. Procedure
Subtask 34-38-34-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the On-Board Airport Navigation Computer (OANC) Mass-Memory Card

CAUTION: OBEY THE ELECTROSTATIC-DISCHARGE SAFETY PRECAUTIONS WHEN YOU DO MAINTENANCE ON OR NEAR DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. IF YOU DO NOT OBEY THESE PRECAUTIONS, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT.

(1) Turn the turnlock fastener (1) a quarter of a turn counterclockwise to open the access door (2).
(2) Push the extractor button (4).
(3) Remove the OANC mass-memory card (5) from the OANC (3).
(4) Put the OANC mass-memory card (5) in the BAG - ANTISTATIC.

[Rev.10 from 2021] 2026.04.02 06:23:19 UTC