H. Examine forward body nose section and radome for cracks, distortion, delamination,
misalignment, displacement of skins, and pulled or missing fasteners.
I. Examine inside and outside of radome for honeycomb core damage and soft spots.
J. Examine nose cowl and nose dome for dents, cracks, buckling, pulled or missing fasteners, damage to acoustic panels, and damage to the Pt2 probe.
K. Examine engine for bent or broken fan and compressor blades (Ref. P&W MM 72-00/601). Also, look for dented and cracked side cowls, oil leaks, plugged ram air CSD cooler (if installed), and plugged Ps3 filter (Ref. P&W MM 75-30 IC) look in the exhaust area for F.O.D and/or metal particles. If engine appears serviceable, operate engine (Ref. AMM 71-09-100/201). To assure that takeoff power is available, record all engine parameters.
L. Determine if a takeoff power engine run is required:
(1)
If there is evidence of a birdstrike or if changes in engine parameters have been recorded, you must operate the engine (Ref. 71-09-100/201). To assure takeoff power is available, record all engine parameters.
(2)
If there is no evidence of bird ingestion and if no changes in engine parameters are recorded, and engine run at takeoff power is not required.
NOTE: Signs of birdstrike are not always easy to see. A small quantity of organic material in the inlet is a sign of a birdstrike. Bird parts are usually found in the locations that follow: on the inboard surface on the part span shrouds on the concave side, on the outboard ends of the exit guide vanes for the fan, and on the outboard ends of the inlet guide vanes for the low pressure compressor. The inspection of the inlet area can be helped if you follow the pattern of the bird parts to find the possibly damaged areas.
M. Examine the Stage 1 compressor for shingled blades. If you find shingled blades refer to the Pratt and Whitney JT8D maintenance manual Ref. 72-00/601.
3. Hail Strike (Airplane on Ground) Conditional Inspection
A. Examine wing, nacelle strut, and horizontal and vertical stabilizer fairing for dents,
displacement, distortion, flaking paint, or skin cracks.
B. Examine pylon panels, doors, and structure for dents, cracks, and flaking paint.
C. Examine wing, structure, panels, and doors for dents, displacement, distortion, flaking paint, or cracks. Examine both sides of honeycomb panels for cracks, delamination, soft spots, and core damage.
D. Examine nose and main gear doors for dents and other evidence of damage.
E. Check pilot’s windows for delamination, spalling, or cracks, and adjacent structure for distortion or cracks.
F. Examine forward body nose section and radome for dents, cracks, distortion, or delamination.
G. Examine inside and outside of radome for honeycomb core damage and soft spots.
H. For allowable hail damage, refer to the structural repair manual (SRM).
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5-51-201 Page 202 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/99
NACELLE PRESSURE RELIEF DOORS OPEN CONDITION - MAINTENANCE PRACTICES (CONDITIONAL INSPECTION)
1. General
A. The pressure relief doors are designed to protect the nacelle/strut structure from over-pressurization due to excessive leakage from or rupture of pneumatic ducts. However, it is possible for the doors to open as a result of hard landings, severe turbulence, engine vibration, or any other condition that would create temporary or permanent distortion. If the doors are found open conduct the following inspections.
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