(2)
Engine seizure
(3)
Other engine damage
(4)
Other nacelle damage
D. Other engine damage refers to incidents which result in unusual engine vibration.
NOTE: These vibrations can be caused by loss of fan blades or other
____
parts of the engine or cowling.
E. Other nacelle damage refers to conditions that cause damage to the nacelle or the cowling.
(1) This type of damage, such as dents or wrinkles is caused when the nacelle or cowling are hit by ground support equipment.
TASK 05-51-06-212-025
2. Dragged Engine Nacelle/Engine Seizure/Engine and Nacelle Damage Conditional___________________________________________________________________________ Inspection
__________
NOTE: The data in this procedure applies to:
________
-a dragged engine nacelle
-an engine seizure
-engine impact damage
-nacelle impact damage to cowls, tail cone, or reverser sleeves.
A. References
(1) AMM 06-09-09/201, Nacelle and Engine-to-Wing Fairing Access Doors and Panels
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747-400
MAINTENANCE MANUAL
(2)
AMM 54-51-02/401, Nacelle Strut Attach Pin/Bolt
(3)
AMM 71-00-00/601, Power Plant.
B. Inspections, Repairs, and Replacements
S 212-038
(1) When this procedure tells you to "examine" a part, look for these conditions (repair or replace the part, if it is necessary):
-cracks
-structure that pulled apart
-loose paint (paint flakes)
-twisted parts (distortion)
-bent parts
-wrinkles or buckles in the structure
-fastener holes that became larger of longer
-loose fasteners
-missing fasteners (fasteners that have pulled out or are gone)
-delaminations (a component with one or more layers pulled apart)
-parts that are not aligned correctly
-interference (clearance that is not sufficient between two parts)
-discoloration (heat damage)
-nicks or gouges
- other signs of damage.
S 212-039
(2) When the conditional inspection tells you to "examine" a fuse pin, use one of the following inspection methods:
(a) Fuse pin inner diameter distortion inspection, method number 1. 1) Access the fuse pin that is to be inspected. a) Remove all strut panels and doors, and open the nacelle cowlings (AMM 54-52-01/601). 2) Remove the bolt that goes through the fuse pin and the end caps of the fuse pin that is going to be inspected. 3) Clean the grease away from the inner diameter of the fuse pin.
4) Use a straightedge or an equivalent device and look for distortion of the inner diameter of the fuse pin. a) If you find damage in the upper link fuse pin, do the
same inspection for the diagonal brace fuse pin (aft pin).
(b)
Fuse pin joint rotation inspection, method number 2. 1) Remove the load from the joint that has the fuse pin to be inspected. 2) Access the fuse pin that is to be inspected. a) Remove all strut panels and doors, and open the nacelle cowlings (AMM 54-52-01/601).
3) Rotate the fuse pin. If the fuse pin is free to rotate, no damage exists.
(c)
Fuse pin partial removal and binding inspection, method number 3. 1) Remove the load from the joint that has the fuse pin to be
inspected.
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