Detailed Inspection of Fuselage Internal Structure including Forward Face of Pressure Bulkhead, from Stringer 38 LH/RH to Bottom Centerline

TASK 53-21-00-200-013-A
Detailed Inspection of Fuselage Internal Structure including Forward Face of Pressure Bulkhead, from Stringer 38 LH/RH to Bottom Centerline

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

ZONE: 130
ZONE: 133
ZONE: 134
ZONE: 137
ZONE: 138

1. Reason for the Job
Refer to the MPD TASK: 532180-01
DETAILED INSPECTION OF FUSELAGE INTERNAL STRUCTURE INCLUDING FORWARD FACE OF PRESSURE BULKHEAD, FROM STRINGER 38 LH/RH TO BOTTOM CENTERLINE

NOTE: This inspection is applicable to the area between FR24 and FR35. The type 2 Temporary Protection System (TPS) can be applied in these limits:

On the fuselage internal structure, from FR34 to FR35
On the forward face of the pressure bulkhead, from left and right stringer 38 to the bottom centerline.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	FLASHLIGHT
No specific	1	MIRROR - INSPECTION, FLEXIBLE
No specific	AR	TIE WRAP(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.12ADB1)	Corrosion Preventive Compound-Water Displacing & Heavy Duty Hard Film -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
130	FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX
133	BAY UNDER FWD CAR COMPT FLOOR
134	BAY UNDER FWD CAR COMPT FLOOR
137	BAY BETW AFT PART. BULKHEAD OF FWD CARGO
138	BAY BETW AFT PART. BULKHEAD OF FWD CARGO
825

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-23-11-911-001-A	Installation of the Hydraulic Tubes
TASK 20-23-38-000-001-A	Removal of the Tube of the Potable Water and the associated Air Supply System
TASK 20-23-38-400-003-A	Installation of the Tube Assembly of the Potable Water and the associated Air Supply System
TASK 21-20-00-010-001-A	Removal of the Air-Conditioning Distribution Ducts
TASK 21-20-00-410-001-A	Installation of the Air-Conditioning Distribution Ducts
TASK 25-52-22-000-001-A	Removal of the Ball Mats and the Ball Strips
TASK 25-52-22-400-001-A	Installation of the Ball Mats and the Ball Strips
TASK 25-80-00-000-001-A	Removal of the Insulation Blankets
TASK 25-80-00-400-001-A	Installation of the Insulation Blankets
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 51-78-00-916-001-A	Application of Temporary Protection System (TPS)
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 53-22-14-000-001-A	Removal of the Forward Cargo-Compartment Floor-Panels
TASK 53-22-14-400-001-A	Installation of the Forward Cargo-Compartment Floor-Panels
TASK 53-22-14-400-001-A-01	Installation of the Forward Cargo-Compartment Floor-Panels (Alternative Installation Procedure with the Skyflex Option)
SRM 511100	(for corrective action)
SRM 512200	(for corrective action)
Fuselage Internal Structure between FR24 and FR35, from Left and Right Stringers 38 to the Bottom Centerline ** ON A/C NOT FOR ALL
Fuselage Internal Structure between FR24 and FR35, from Left and Right Stringers 38 to the Bottom Centerline ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 53-21-00-010-093-A ** ON A/C NOT FOR ALL

A. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at forward cargo-compartment door 825.
(2) Open forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-001).
(3) Remove ACT4 and ACT6 from zones 137 and 138, if installed (Ref. AMM TASK 28-11-27-000-005).
(4) If necessary, remove the ball mats (Ref. AMM TASK 25-52-22-000-001).
(5) Remove the applicable forward cargo-compartment floor-panels to get access to the inspection area (Ref. AMM TASK 53-22-14-000-001).
(6) If necessary, remove the insulation blankets (Ref. AMM TASK 25-80-00-000-001).
(7) If necessary, remove the water pipes (Ref. AMM TASK 20-23-38-000-001).
(8) f necessary, remove the drain pipe (Ref. AMM D/O 25-53-00-00).
(9) If necessary, remove the air-conditioning distribution ducts (Ref. AMM TASK 21-20-00-010-001).
(10) If necessary, cut the applicable tie wraps and move the electrical harnesses to get access to the inspection area.
(11) If necessary, remove the hydraulic tubes:
(a) Make sure that the hydraulic system is depressurized (Ref. AMM TASK 29-00-00-864-001).
(b) Remove the hydraulic tubes to get access to the inspection area.
(12) If necessary, use the FLASHLIGHT and the MIRROR - INSPECTION, FLEXIBLE to do this inspection.

Subtask 53-21-00-110-068-A ** ON A/C NOT FOR ALL

B. Preparation of the Inspection Area
(1) Make sure that the inspection area is sufficiently clean to do a satisfactory inspection of the area.
(2) If not, clean the inspection area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(3) If there is a TPS layer and if it does not let you do a satisfactory inspection, remove the TPS layer (Ref. AMM TASK 51-78-00-916-001).

4. Procedure
Subtask 53-21-00-220-068-A ** ON A/C NOT FOR ALL

A. Inspection
(1) Do a detailed inspection of the fuselage internal structure between FR24 and FR35. This inspection includes the forward face of the pressure bulkhead, from left and right stringer 38 to the bottom centerline.
(2) Make sure that there is no:
(a) Corrosion damage:
If you find corrosion, refer to SRM 512200 for the corrosion types, inspection, removal and subsequent corrosion protection.
(b) Other damage (scratches, cracks, gouges, dents, creases):
If you find this type of damage, refer to SRM 511100 for the damage types, classification and corrective action.

Subtask 53-21-00-916-052-A ** ON A/C NOT FOR ALL

B. Check and Application of the TPS Layer

CAUTION: DO NOT APPLY TEMPORARY PROTECTION SYSTEM (TPS) TYPE 3 ON THE MOVABLE COMPONENTS. USE ONLY TPS TYPE 1 GRADE 2. IF YOU DO NOT OBEY THIS INSTRUCTION, THE MECHANISMS WILL NOT OPERATE CORRECTLY.

(1) If the TPS was removed at the "Preparation of the Inspection Area", apply a new layer of Corrosion Preventive Compound-Water Displacing & Heavy Duty Hard Film - (Material No.12ADB1) (Ref. AMM TASK 51-78-00-916-001).
(2) If the TPS was not removed at the "Preparation of the Inspection Area", do a check of the condition and integrity of the TPS layer (Ref. AMM TASK 51-78-00-916-001).
(3) If the TPS layer has local damage, remove the damaged TPS layer and apply a new layer of Corrosion Preventive Compound-Water Displacing & Heavy Duty Hard Film - (Material No.12ADB1) (Ref. AMM TASK 51-78-00-916-001).

5. Close-up
Subtask 53-21-00-942-067-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) If removed, install the hydraulic tubes (Ref. AMM TASK 20-23-11-911-001).
(3) If moved, put the electrical harnesses in position and safety them with the new TIE WRAP(S).
(4) If removed, install the air-conditioning distribution ducts (Ref. AMM TASK 21-20-00-410-001).
(5) If removed, install the drain pipe (Ref. AMM D/O 25-53-00-40).
(6) If removed, install the water pipes (Ref. AMM TASK 20-23-38-400-003).
(7) If removed, install the insulation blankets (Ref. AMM TASK 25-80-00-400-001).
(8) Install the forward cargo-compartment floor-panels (Ref. AMM TASK 53-22-14-400-001).
(9) If removed, install the ball mats (Ref. AMM TASK 25-52-22-400-001).
(10) Install ACT4 and ACT6 in zones 137 and 138, if removed (Ref. AMM TASK 28-11-27-400-005).
(11) Close forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002).
(12) Remove the access platform(s).
(13) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:28:57 UTC