Removal of the HP Air-Ground Connector Door

TASK 52-42-16-000-001-A
Removal of the HP Air-Ground Connector Door

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: YOU MUST PUT ON AND ATTACH A SAFETY HARNESS BEFORE YOU START WORK:

ON THE THS OR IN THE REAR FUSELAGE
ON TOP OF THE WINGS OR PYLONS.

WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

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 3M (10 FT)- ADJUSTABLE
No specific	1	COVER - PLASTIC
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
191DB

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)
HP Air-Ground Connector Door (191DB) ** ON A/C NOT FOR ALL
HP Air-Ground Connector Door (191DB) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 52-42-16-860-055-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002)

Subtask 52-42-16-865-054-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	IGGS/CTRL	7YA	N28
** ON A/C NOT FOR ALL
121VU	IGGS/CTRL	7YA	P28
** ON A/C NOT FOR ALL
122VU	CSAS / CTRL	1HW	U17

Subtask 52-42-16-010-050-A

C. Get Access
(1) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position in zone 191.
(2) Open the access door 191DB.

4. Procedure
Subtask 52-42-16-020-050-B ** ON A/C NOT FOR ALL

A. Removal of the HP Air-Ground Connector Door

HP Air-Ground Connector Door (191DB) ** ON A/C NOT FOR ALL

(1) Release the spring (3) from the spring fitting (7).
(2) Hold the door (2).
(3) Remove the nuts (6) and the bolts (1) from the hinges (4).
(4) Remove and keep the door stopper (5).
(5) Remove the door (2).

Subtask 52-42-16-020-050-C ** ON A/C NOT FOR ALL

A. Removal of the HP Air-Ground Connector Door

HP Air-Ground Connector Door (191DB) ** ON A/C NOT FOR ALL

WARNING: DO NOT GO INTO THE WORK AREA UNTIL A MINIMUM OF 5 MINUTES AFTER YOU REMOVE THE ACCESS PANEL. LET AIR FLOW THROUGH THE WORK AREA. AIR FROM THIS SYSTEM HAS A LOW OXYGEN CONTENT AND CAN CAUSE INJURY OR DEATH.

(1) Release the spring (3) from the spring fitting (7).
(2) Record the position of the clamp (9).
(3) Hold the flexible hose of the OEA outlet (below) (8) and loosen the screw of the clamp (9).
(4) Let the bellow (8) to retract smoothly to its position and remove the clamp (9).
(5) Remove the nuts (6) and the bolts (1) from the hinge (4).
(6) Remove and keep the door stopper (5).
(7) Remove the door (2).
(8) Put a COVER - PLASTIC on the bellow (8).

[Rev.10 from 2021] 2026.04.01 01:45:37 UTC