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6) Nose landing gear
a) Carefully inspect the sliding body and the axle for cracks and / or distortion, grooves, distortions on the sliding section.
b) Check the geometry and condition of the scissors, then remove the upper and lower pins and inspect them under a 10 x magnifying glass (for a dye penetrant inspection). Repeat this procedure on the central pin. Check the bore of the bushings and the upper and lower bosses (cracks).
c) Carefully inspect the nose landing gear leg and its attachment on the engine mount.
d) Detect distortion or defect at mount level, inspect its attachments on the firewall.
e) Carefully inspect the fork (cracks, distortion).
f) Carefully inspect the strut, structure of the two arms, attachments on the landing gear leg and on the firewall.
g) Carefully inspect the actuating cylinder and the compensating rods : attachment fittings and distortion of the rod.
7) L.H. and R.H. main landing gear
a) Carefully inspect the swivel arm and the axle for cracks and / or distortion.
b) Check the geometry and condition of the scissors, then remove the upper and lower pins and inspect them under a 10 X magnifying glass (for a dye penetrant inspection). Repeat this procedure on the central pin. Check the bore of the bushings and the upper and lower bosses (cracks).
c) Carefully inspect the upper leg, particularly the clamp casings on the structure and the connection with the strut. Carefully inspect the strut : the structure of the two arms and the attachments in the landing gear well and to the landing gear leg.
d) Carefully inspect the shock-absorber, check for grooves, distortion on the sliding section, attachments and attachment fittings.
e) Carefully inspect the actuating cylinder : attachment fittings and check for distortion of the rod.
f) Check for main landing gear lateral slack.
8) Structure in the landing gear wells
a) Inspect the structure in the landing gear wells.
b) Check the landing gear attachment fittings, the strut and actuator connecting rivets and attachment fittings.
c) Check for distortion of the spar web (blistering), of the side rib webs and of landing gear well sides.
d) Check attachment components (ribs, gussets, rivets) for defect.
9) Wings
a) Carefully inspect the upper and lower surface outer skins, particularly check for folds between ribs N1 and N3.
b) Check for signs of excessive stress and permanent distortion along the lines of rivets between the spars and the skin, particularly on the lower surface.
c) Carry out a general inspection of the alignment of control surfaces and flaps at neutral position.
d) Perform a complete maneuver of the ailerons and flaps (full deflection) ; listen for unusual noises, check for friction points and interference. Watch the control surfaces to ensure that they move smoothly.
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TB 20 MAINTENANCE MANUAL 05 TIME LIMITS MAINTENANCE CHECKS TB20飞机维护手册 05 时间限制维护检查 2(87)
