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A
737-300/400/500MAINTENANCE MANUAL
 D. Examine the Engine Nacelles
 S 212-014
 (1)
Do an engine inspection after a hard landing (AMM 72-00-00/601).

 S 212-017

 (2)
Do an inspection of a dragged engine nacelle (AMM 05-51-61/201).

 E. Examine the Flight Controls
 S 712-018
 (1)  Do a check of the flight controls for smooth movement and correct cable tension (Ref Chapter 27).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A 737-300/400/500MAINTENANCE MANUAL
 ú  EXCESSIVE AILERON OR RUDDER TRIM CORRECTION WITH FLAPS EXTENDED -
_________________________________________________________________ ú MAINTENANCE PRACTICES (CONDITIONAL INSPECTION)
______________________________________________
 1. General
_______ ú A. This procedure contains one task: ú (1) Outboard Flap Carriage Spindle Fracture Inspection.
 B. Operators have reported that due to fracture of inboard spindle of the ú outboard flap, pilots have had to hold more than 2.5 units of wheel or an ú unspecified amount of rudder to keep the airplane level. With one
 spindle broken, the airplane is controllable. But with both spindles broken at the critical section (forward end of the spindle), continued ú safe flight and landing for the airplane may be precluded. For this
 reason, if the flight crew reports that during the flap operation they ú had to use 2.5 or more units of wheel and/or 1.0 and/or more unit of ú rudder to keep the airplane level, both spindles must be inspected for ú fracture. ú C. Inspect outboard flap carriage spindles for fractures, if either of the ú conditions below are required to maintain level flight when flaps are in ú transition or at any extended positions: ú (1) 2.5 units or more or wheel. ú (2) 1.0 or more units of rudder. ú         ú
WARNING:_______YOU MUST PERFORM THIS INSPECTION PRIOR TO THE ú NEXT FLIGHT. IF YOU DO NOT PERFORM THIS ú INSPECTION PRIOR TO THE NEXT FLIGHT, INJURY TO ú PERSONS CAN OCCUR.
 D. This inspection is required prior to the next flight. ú ú TASK 05-51-75-212-002 ú2. Outboard Flap Carriage Spindle Fracture Inspections
___________________________________________________ ú A. General ú (1) You must do one of the two inspections below. The ultrasonic ú inspection is preferred and should performed when the equipment is ú available. If the ultrasonic inspection equipment is not available, ú the alternate inspection in this procedure should be performed. ú (2) See AMM 27-51-44/401, Fig. 401 for carriage spindle removal and ú installation. ú B. Prepare for the Inspection
 S 212-001
 (1) Extend flaps to detent 40.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A 737-300/400/500MAINTENANCE MANUAL
 ú  C.  Ultrasonic Inspection (Preferred)
 ú
 ú  S 752-006
 ú  (1) Perform ultrasonic inspection on carriages as shown in Boeing 737
 ú  NDT Manual, Part 4-57-50-02 to detect fractured spindles.
 ú 
        ú
 NOTE: Perform the procedure at both inboard and outboard carriage____
 ú  positions.
 ú  (a) If a fracture is detected in one of the carriage spindles, do
 ú  these steps:
　
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