Detailed Inspection of Ti-Angle Connection between Belly Fairing and Keel Beam Side Panel FR40 to FR42, LH/RH

TASK 53-31-00-220-810-A
Detailed Inspection of Ti-Angle Connection between Belly Fairing and Keel Beam Side Panel FR40 to FR42, LH/RH

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

ZONE: 140
ZONE: 190

1. Reason for the Job
Refer to the MPD TASK: 531259-02
DETAILED INSPECTION OF TI-ANGLE CONNECTION BETWEEN BELLY FAIRING AND KEEL BEAM SIDE PANEL FR 40 - FR 42, LH/RH.

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	WARNING NOTICE(S)

B. Consumable Materials

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

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
140	CENTER WING
190	BELLY FAIR, AIR CONDITIONING & HYD COMPT

D. 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)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 29-10-00-863-001-A	Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-002-A	Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-003-A	Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-003-A-01	Pressurize the Blue Hydraulic System with the Blue Electric Pump
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
TASK 29-23-00-863-001-A	Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 53-35-11-000-001-A	Removal of the Wing-to-Fuselage Fairings
TASK 53-35-11-400-001-A	Installation of the Wing-to-Fuselage Fairings
TASK 53-35-13-000-001-A	Removal of the Belly Fairing Access Panels
TASK 53-35-13-000-002-A	Removal of the Quick-Release Access Panels from the Belly Fairing Structure
TASK 53-35-13-400-001-A	Installation of the Belly Fairing Access Panels
TASK 53-35-13-400-002-A	Installation of the Quick-Release Access Panels on the Belly Fairing Structure
SRM 53312900	(for corrective action)
Inspection Areas of Ti-Angle Connection between Belly Fairing and Keel Beam Side Panel FR40 to FR42, LH/RH

3. Job Set-up
Subtask 53-31-00-010-137-A

A. Get Access
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(2) Open the MLG doors (Ref. AMM TASK 32-12-00-010-001).
(3) Depressurize the Green, Blue and Yellow hydraulic systems (Ref. AMM TASK 29-10-00-864-001), (Ref. AMM TASK 29-10-00-864-002), (Ref. AMM TASK 29-10-00-864-003).
(4) Put the WARNING NOTICE(S) in position to tell persons not to operate the landing gear.
(5) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the inspection area.
(6) Remove the access panels 147AB, 147BB, 148DB, 191KB, 191JB, 192KB, 195AB and 196AB (Ref. AMM TASK 53-35-11-000-001), (Ref. AMM TASK 53-35-13-000-001), (Ref. AMM TASK 53-35-13-000-002).

Subtask 53-31-00-110-136-A

B. Preparation for the Inspection Area
(1) Make sure that the inspection area is sufficiently clean to do a satisfactory inspection of the area.

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

(2) If not, clean the inspection area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and a Textile-Lint free Cotton - (Material No.14SBA1) .

4. Procedure
Subtask 53-31-00-220-075-A

A. Detailed Inspection

Inspection Areas of Ti-Angle Connection between Belly Fairing and Keel Beam Side Panel FR40 to FR42, LH/RH

(1) Do a detailed inspection of the Ti-angle connection between belly fairing and the side panel of the keel beam between FR40 and FR42, LH/RH. Look for cracks.

NOTE: If necessary, refer to the ASRM SRM 53312900 for the correct repair procedure.

5. Close-up
Subtask 53-31-00-410-134-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panels 147AB, 147BB, 148DB, 191KB, 191JB, 192KB, 195AB and 196AB (Ref. AMM TASK 53-35-11-400-001), (Ref. AMM TASK 53-35-13-400-001), (Ref. AMM TASK 53-35-13-400-002).
(3) Pressurize the Green, Blue and Yellow hydraulic systems (Ref. AMM TASK 29-23-00-863-001) or (Ref. AMM TASK 29-10-00-863-001), (Ref. AMM TASK 29-10-00-863-002), (Ref. AMM TASK 29-10-00-863-003).
(4) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
(5) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(6) Remove the WARNING NOTICE(S).
(7) Remove the access platform(s).
(8) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:29:08 UTC