Inspection of the Emergency Exit Hatch Mechanism

TASK 52-21-00-200-002-A
Inspection of the Emergency Exit Hatch Mechanism

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Consumable Materials

REFERENCE	DESIGNATION
(Material No.12ABE2)	Corrosion Preventive Compound-Water Displacing Oily Film System

B. Referenced Information

REFERENCE	DESIGNATION
TASK 25-23-47-000-001-A	Removal of the Lining from the Emergency Exit Hatches
TASK 25-23-47-400-001-A	Installation of the Lining on the Emergency Exit Hatches
TASK 51-73-11-300-001-A	Repair of Minor Damage on Aluminum Clad Components
TASK 51-74-11-300-001-A	Repair of Corroded Areas
TASK 52-21-11-000-001-A	Removal of the Emergency Exit Hatch
TASK 52-21-11-000-002-A	Removal of the Hatch Locking Mechanism
TASK 52-21-11-000-003-A	Removal of the Slide Release Mechanism
TASK 52-21-11-400-001-A	Installation of the Emergency Exit Hatch

3. Job Set-up
Subtask 52-21-00-010-055-A ** ON A/C NOT FOR ALL

A. Get Access
(1) Remove the emergency exit hatch (Ref. AMM TASK 52-21-11-000-001).
(2) Remove the hatch lining from the emergency exit hatch (Ref. AMM TASK 25-23-47-000-001).
(3) Carefully disengage the VELCRO tapes and remove the insulation packs.

4. Procedure
Subtask 52-21-00-210-052-A ** ON A/C NOT FOR ALL

A. Inspection of the Hatch Locking Mechanism and Slide Release Mechanism
(1) Examine the locking hooks, the locking shaft and the connection rod of the hatch locking mechanism for corrosion, marks and deformation.

NOTE: Replace the deformed components of the hatch locking mechanism (Ref. AMM TASK 52-21-11-000-002).

(2) Examine the latch pin and the guide fitting of the slide release mechanism for corrosion, marks and deformation.

NOTE: Replace the deformed components of the slide release mechanism (Ref. AMM TASK 52-21-11-000-003).

(3) Examine the components of the roller guide assemblies for corrosion, marks and deformation.

NOTE: Replace the deformed hook bracket, the related pivot fitting, the lateral guide fittings and the upper roller fitting immediately.

(4) If you find damage, continue as follows:
(a) Repair the corroded area (Ref. AMM TASK 51-74-11-300-001).
(b) Repair the marks (Ref. AMM TASK 51-73-11-300-001).
(5) Examine the springs of the hatch control handle for the correct condition.
(6) Examine the spring of the latch pin for the correct condition.

NOTE: If the spring is not in the correct condition, replace it (Ref. AMM TASK 52-21-11-000-003).

(7) Make sure that there is Corrosion Preventive Compound-Water Displacing Oily Film System (Material No.12ABE2) on the movable components of the locking and the slide release mechanism.
(8) Make sure that all attachment screws and bolts are correctly tightened.
(9) Make sure that the attachment bolts of the fittings are correctly tightened.
(10) Make sure that there is Corrosion Preventive Compound-Water Displacing Oily Film System (Material No.12ABE2) on the movable components of the roller guide assemblies.

Subtask 52-21-00-220-052-A ** ON A/C NOT FOR ALL

B. Inspection of the Hatch Seal
(1) Examine the hatch seal for the correct condition.
(2) Make sure that the hatch seal is correctly installed in the retaining profile of the hatch structure.
(3) Do an inspection of the hatch seal from the outer side of the installed emergency exit hatch.

NOTE: Make sure that the lip of the hatch seal is correctly installed behind the inner side of the fuselage skin.

Subtask 52-21-00-710-053-A ** ON A/C NOT FOR ALL

C. Operational Test
(1) Operate the hatch control handle to make sure that the hatch locking mechanism is serviceable.
(2) Extent and retract the latch pin to make sure that the slide release mechanism is serviceable.
(3) Make sure that the rollers of the lateral guide fittings are serviceable.
(4) Make sure that the rollers of the upper roller fittings are serviceable.

5. Close-up
Subtask 52-21-00-410-057-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the insulation packs and attach the VELCRO tapes.
(3) Install the hatch lining to the emergency exit hatch (Ref. AMM TASK 25-23-47-400-001).
(4) Install the emergency exit hatch (Ref. AMM TASK 52-21-11-400-001).

[Rev.10 from 2021] 2026.04.02 06:27:34 UTC