–
structure that pulled apart
–
loose paint (paint flakes)
–
twisted parts (distortion)
–
bent parts
–
fastener holes that became larger or longer
–
loose fasteners
–
missing fasteners (fasteners that have pulled out or are gone)
–
delaminations (a lamination with one or more layers pulled apart)
–
parts that are not aligned correctly
–
interference (clearance that is not sufficient between two parts) – other signs of damage
(2)
Replace or repair the components that have one or more of the conditions given above.
(3)
If fasteners are removed, replace with new fasteners.
2. Phase 1 Inspection
A. Engine Inspection
(1) Engine Compressor Section
(a) Examine the:
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1) inlet case
2) inlet guide vanes
3) front bearing support
4) compressor blades that you can see
NOTE: If you find damage, refer to Chapter 72, Engine, for approved limits and maintenance procedures.
(2) Engine Exhaust Section
(a)
Examine the:
1) exhaust cone
2) exhaust nozzle
3) exhaust struts
4) turbine blades in the fourth stage
5) aft edge of the nozzle guide vanes
(b)
Look for burn marks: 1) in the turbine exhaust area 2) on the rear fan case (from blades that rubbed on the case)
(c)
Look in the exhaust area for:
1) small pieces of metal
2) quantities of oil
NOTE: If you do not find damage during the Phase 1 inspection, the Phase 2 inspection is not necessary.
3. Phase 2 Inspection
A. Engine
(1) Remove the engine (Ref 71-00-00/401)
B. Inspection of the inboard side of the Engine Forward Mount (Fig. 201)
(1)
Remove and examine the bolt (1) that attaches the support fitting of the engine forward mount to the clevis fitting (installed on the wing lower surface).
(2)
Examine the clevis fitting (2).
NOTE: If no damage is found, no further inspections are necessary.
C. Inspection of the Outboard Side of the Engine Forward Mount (Fig. 201)
(1)
Remove and examine the bolt (3) that attaches the support fitting of the engine forward mount to the swinging link.
(2)
Remove and examine the bolt (4) that attaches the swinging link to the bracket installed on the wing front spar.
(3)
Examine the swinging link (5).
(4)
Examine the bracket (6) installed on the wing front spar.
D. Other Inspection Items (Fig. 201)
(1)
Remove and examine the two forward (7) and one aft (8) cone bolts.
(2)
Examine the two engine mount rings [forward (9) and aft (10)] adjacent to the cone bolts.
(3)
Remove and examine the four thrust link bolts (11).
(4)
Examine the thrust link fittings (12) that connect the thrust links to the wing lower surface.
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G53198 B83450
500 Engine Mount and Cone Bolt Installation
Jun 20/93 Figure 201 (Sheet 1) 5-51-61
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Engine Mount and Cone Bolt Installation 500
5-51-61 Figure 201 (Sheet 2) Feb 01/95
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ENGINE NACELLE AND THRUST REVERSER DAMAGE – MAINTENANCE PRACTICES (CONDITIONAL INSPECTION)
1. General
A. Engine Nacelle and Thrust Reverser Damage If damage to the engine nacelle or thrust reverser occurs, a structural inspection is necessary. The conditions for these inspections are:
–
an engine nacelle or thrust reverser that hit the ground (dragged nacelle).
–
an engine nacelle or thrust reverser that was hit by an object sufficiently heavy (for example: ground support equipment) to cause structural damage.
–
an engine that broke away (engine separation/breakaway).
–
wrinkles on the nacelle.
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