Detailed Visual Inspection of Lower Skin of Longitudinal Lap Joint at Stringer 18 LH and Stringer 18 RH, in Runout Area at FR42, Internal

TASK 53-31-00-210-027-A
Detailed Visual Inspection of Lower Skin of Longitudinal Lap Joint at Stringer 18 LH and Stringer 18 RH, in Runout Area at FR42, Internal

ZONE: 241
ZONE: 242

1. Reason for the Job
Refer to the MPD TASK: 533138-01
DETAILED INSPECTION OF LOWER SKIN OF LONGITUDINAL LAP JOINT AT STRINGER 18 LH AND STRINGER 18 RH, IN RUNOUT AREA AT FR 42, INTERNAL

2. Job Set-up Information
A. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
241	CENTER PASSENGER COMPARTMENT
242	CENTER PASSENGER COMPARTMENT

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 25-23-43-000-001-A	Removal of the Upper Sidewall Panel
TASK 25-23-43-400-001-A	Installation of the Upper Sidewall Panel
TASK 25-80-00-000-001-A	Removal of the Insulation Blankets
TASK 25-80-00-400-001-A	Installation of the Insulation Blankets
SRM 53001102	(for corrective action)
SRM 53001302	(for corrective action)
SRM 53311101	(for corrective action)
Internal Lower Skin of Longitudinal Lap Joint at Stringer 18 LH and RH, in Runout at FR42

3. Job Set-up
Subtask 53-31-00-861-055-A

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

Subtask 53-31-00-010-083-A

B. Get Access
(1) Remove the necessary upper sidewall panels (Ref. AMM TASK 25-23-43-000-001).
(2) Remove the necessary insulation blankets (Ref. AMM TASK 25-80-00-000-001).

Subtask 53-31-00-110-072-A

C. Cleaning Procedure

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

(1) Clean the inspection area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and a Textile-Lint free Cotton - (Material No.14SBA1) , if necessary. Make sure the area is dry before you continue.

4. Procedure
Subtask 53-31-00-210-074-A

A. Detailed Visual Inspection Procedure

Internal Lower Skin of Longitudinal Lap Joint at Stringer 18 LH and RH, in Runout at FR42

(1) Do a detailed visual inspection of the internal lower skin of the longitudinal lap joint at stringers 18LH and 18RH, in the runout area at FR42, for cracks.

NOTE: If required, for information on allowable damage and repair procedures for cracks, refer to the following ASRM's:

skin plates, allowable damage SRM 53311101 and repairs SRM 53001102,
Stringers and Stiffeners, repairs SRM 53001302.

5. Close-up
Subtask 53-31-00-410-081-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the insulation blankets (Ref. AMM TASK 25-80-00-400-001).
(3) Install the upper sidewall panels (Ref. AMM TASK 25-23-43-400-001).

Subtask 53-31-00-862-055-A

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

[Rev.10 from 2021] 2026.04.02 06:29:05 UTC