Detailed Inspection of Lavatory Wall and Lower Attachment Points

TASK 25-40-00-220-001-A
Detailed Inspection of Lavatory Wall and Lower Attachment Points

ZONE: 200

1. Reason for the Job
Refer to the MPD TASK: 254000-03
DETAILED INSPECTION OF LAVATORY WALL AND LOWER ATTACHMENT POINTS.

NOTE: REFER TO ISB 25-1365 FIGURE 1 SHEET 1 FLOW CHART FOR FURTHER DETAILS

2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE

B. 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

3. Job Set-up
Subtask 25-40-00-861-055-A ** ON A/C NOT FOR ALL

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

Subtask 25-40-00-861-055-B ** ON A/C NOT FOR ALL

A. There is no special job set-up for this task.

4. Procedure
Subtask 25-40-00-220-050-A ** ON A/C NOT FOR ALL

A. Detailed Visual Inspection of the Lavatory Walls for Corrosion
(1) Do the detailed visual inspection of the affected areas as specified in ISB 25-1365.

Subtask 25-40-00-220-050-B ** ON A/C NOT FOR ALL

A. General Information
(1) The detailed visual inspection of the lavatory walls for corrosion is not necessary because of the new honeycomb material introduced with modification 31574 K7442.

5. Close-up
Subtask 25-40-00-862-056-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.03.31 23:34:58 UTC