S 202-021
(22)
Examine the side strut beam forward of Body Station 1350 and at waterline 140.
(a) Look for local buckling, paint flakes, cracks and fasteners that are pulled or not there.
S 202-022
(23) Examine the horizontal deck at waterline 152 and at the side of the body and aft of Body Station 1350.
(a) Look for local buckling, paint flakes, cracks and fasteners that are pulled or not there.
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05-51-40
ALL ú ú 01 Page 204 ú Oct 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
LANDING WITH DEFLATED LANDING GEAR SHOCK STRUT -
________________________________________________ MAINTENANCE PRACTICES (CONDITIONAL INSPECTION)
______________________________________________
1. General_______
A. Use this procedure when the airplane lands with a shock strut that is deflated. This examination will verify the integrity of the shock struts and the airplane structure.
TASK 05-51-41-202-001
2. Landing with Deflated Landing Gear Shock Strut Inspection_________________________________________________________
A. References
(1)
5-51-05/201, Hard Landing or High Drag/Side Load Landing Condition
(2)
5-51-55/201, Landing with Deflated Nose Gear Shock Strut Condition
B. Access
(1) Location Zone
100 Lower Half of Fuselage
C. Procedure
S 212-002
(1)
If the airplane landed with a deflated shock strut of the main landing gear, examine it:
S 212-005
(2)
If the airplane landed with a deflated shock strut of the main landing gear, do the Wing and Body Gear inspections in both the Phase I and the Phase II examinations in AMM 05-51-05/201 on all the landing gear and the adjacent structure.
S 212-003
(3)
If the airplane landed with a deflated shock strut of the nose landing gear, examine it:
(a) Examine the nose landing gear and the adjacent structure (AMM 05-51-55/201).
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05-51-41
ALL ú ú 01 Page 201 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
FLAP SKEW INSPECTION - MAINTENANCE PRACTICES
____________________________________________
1. General_______
A. Do this inpsection if you find a flap skew condition.
TASK 05-51-43-212-001
2. Flap Skew Inspection____________________
A. Procedure
S 212-002
(1) Flap Skew Inspection
(a)
Pressurize the hydraulic systems No.1 and 4. (AMM 29-11-00/201).
(b)
Extend the inboard trailing edge flap as a unit to between 5 to 30 degrees and determine the best possible position for inspection. (AMM 27-51-00/201).
(c)
Remove pressure from the hydraulic systems No.1 and 4. (AMM 29-11-00/201).
(d)
Do a detailed external visual inspection of the inboard sequence carriage (WBL 235) and outboard sequence carriage (WBL 353). Look for cracks, wear or deformation of the parts listed in the table below. (AMM 27-51-24/601).
Part Name_________ Look For
Toggle Detent Rollers Wear Toggle Clevis Wear Toggle Cross Bar Deformation Toggle Side Arms Deformation Flight Load Rollers Cracks and Deformation Flight Load Roller Lugs Wear Side Guides Wear and Cracks Clevis Lugs Cracks and Deformation Clevis Bushings Migration and Correct Orientation
(e)
Do a detailed external visual inspection of the inboard fore flap in areas near the sequence carriages including the inboard attach link assembly (WBL 235) and outboard attach fitting (WBL 353). Make sure the shims are in place between the horizontal flange and the fore flap skin. Look for cracks or migrated bushings. Look for loose fasteners common to the horizontal flange of the attach fitting, refer to 747-400 MPD S57-054B.
(f)
Do a detailed external visual inspection of the inboard fore flap track including the attachment to lever and lever to fore flap attachment at WBL 162, 300, and 411. Look for cracks or deformation of the fore flap track. (AMM 27-51-02/601). Refer to 747-400 MPD S57-055B.
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