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 NOTE: Examine the midspar chords, webs, and stiffeners carefully.
____
 S 252-003
 (2)  If damage is found in step (1), do the eddy current inspection of the damaged area.
 NOTE:____Midspar chord - 2024T3511 aluminum alloy. (Equivalent to T-3 for eddy current inspection.) Midspar web - 2024-T3 aluminum. (Webs have two .020 sheets bonded.) Midspar cross stiffeners - 7075-T6 aluminum alloy.
 S 212-004
 (3)  Examine these items for heat damage:
 (a)  
Electrical Wires

 (b)  
Electrical Wire Supports

 (c)  
Hydraulic Lines

 (d)  
Hydraulic Line Supports

 (e)  
Control Cables

 (f)  
Pulleys

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A
747-400 MAINTENANCE MANUAL
 (g) Fairleads
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747-400 MAINTENANCE MANUAL
 LEADING EDGE DEVICES RETRACTION SYSTEM (REVERSER ACTUATED)
__________________________________________________________ INOPERATIVE - MAINTENANCE PRACTICES (CONDITIONAL INSPECTION)
__________________________________________________________
 1.  General
_______
 A.  Any time reverse thrust is used with the leading edge devices deployed, an inspection of the leading edge area must be conducted.
 B.  Inspection will be a visual inspection of the leading edge devices and fixed structure normally protected by the retracted leading edge devices.
 C.  Refer to specific structure of system chapter as required for isolation of cause of any malfunction or repair of damage found.
 TASK 05-51-19-212-001
 2.  Leading Edge Flaps Extended during T/R Operation - Conditional Inspection
_________________________________________________________________________
 A.  Procedure
 S 212-002
 (1)  
Examine leading edge flaps for evidence of distortion, heat damage or thrown particle damage.

 S 212-003

 (2)  
Examine actuating mechanism for evidence of damage, contamination or degradation of lubricants by foreign material.

 S 212-004

 (3)  
Examine all fiberglass panels and fixed leading edge support structure for evidence of delamination, distortion or damage.

 S 712-006

 (4)  
Observe retraction of leading edge devices for evidence of faulty operation.

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747-400 MAINTENANCE MANUAL
 LANDING WITH FUEL IN THE TAIL TANK -MAINTENANCE PRACTICES
_________________________________________________________ (CONDITIONAL INSPECTION)
________________________
 1.  General_______
 A.  Two tasks are supplied with this procedure.
 (1)  
The first task is to do an examination of the the horizontal stabilizer and fuel tank.

 (2)  
The second task is to do an examination of the lower aft fuselage structure.

 B.  These examinations are to be done when the airplane completes a normal landing at or below the limitations for landing with more than 1000 gallons (6,700 pounds) of fuel in the horizontal stabilizer fuel tank.
 TASK 05-51-20-202-001
 2.  Examination of the Horizontal Stabilizer and Fuel Tank______________________________________________________
 A.  References
 (1)  
AMM 28-11-19/401, Horizontal-Stabilizer Tank Access-Door

 (2)  
　
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