Textron Bell 412, Руководство по обслуживанию

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BHT-412-MM-2
5-00-00
Page 164
Rev. 23 15 DEC 2015 Export Classification C, ECCN EAR99
b. Inspect flange and outer coupling for nicks, dents,
enlarged holes, and cracks.
BHT-412-CR&O 5. Disassemble coupling assembly for internal inspection as
follows:
a. While holding end plate against spring, remove
retaining ring. Remove end plate and spring. Visually examine
end plate, spring, and retaining ring for evidence of wear and/or
corrosion.
b. Remove cotter pin. Check torque on nut by applying
torque. Do not exceed 50 inch-pounds (5.65 Nm). If nut rotates
under torque, inspect attachment hardware for serviceability.
Replace as required.
c. Remove bolt, nut, and plates. Visually examine faying
surfaces of plates for evidence of wear and/or corrosion.
Remove inner and outer couplings and sleeve from shaft.
d. Remove inner coupling from outer coupling. Remove
retaining ring. Remove retainer, seal, and housing from female
coupling as an assembly. Using an arbor press, ensure retainer
is fully seated in housing.
e. Remove sleeve from inner coupling and inspect for
evidence of wear and/or corrosion.
f. Remove all old grease from inner and outer coupling
teeth using a clean, lint-free cloth. Clean teeth thoroughly.
g. Visually inspect splines of shaft and inner coupling for
evidence of fretting, wear, and/or corrosion. Visually inspect
mating surfaces of male coupling and sleeve for evidence of
wear and/or corrosion. Visually inspect teeth of inner and outer
couplings for evidence of wear, pitting, dings, dents, or chipped
teeth.
h. Inspect seal 214-040-812/412-340-004, in place for
distortion, cuts, tears, and deterioration.
i. Inspect seal housing for damage that could cause
leakage of lubricant.
SPECIAL INSPECTIONS
5-31. EACH 2500 HOURS OF TAIL ROTOR DRIVE SYSTEM OPERATION (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER