Textron Bell 412, Maintenance Manual

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BHT-412-MM-2
5-00-00
26 FEB 2013 Rev. 16 Page 167 Export Classification C, ECCN EAR99
CAUTION
DO NOT USE SOLVENT TO CLEAN COUPLING
T E E T H . S O LV E N T M AY L E AV E A R E S I D U E,
W H I C H P R E V E N T S L U B R I C A N T S F R O M
ADHERING TO COUPLING.
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
coupling for evidence of wear, pitting, dents, or chipped teeth.
h. Inspect end plate for damage that could cause leakage
of lubricant.
i. Inspect seal, in place, for distortions, cuts, tears, and
deterioration.
j. Inspect seal housing for damage that could cause
leakage of lubricant.
BHT-412-CR&O 6. Assemble and lubricate bearing and coupling assembly.
7. Replace TEMP-PLATE overtemperature indicators if
discolored or damaged.
Chapter 65 8. Install assembly on helicopter.
TAIL ROTOR GEARBOX
NOTE
Refer to the BHT-412-CR&O for disassembly,
cleaning, assembly, inspection procedures, and wear
and damage limits.
Chapter 65
BHT-412-CR&O 1. Visually inspect exterior surface of gearbox and adjacent
area for evidence of leaking, seepage, corrosion, and damage.
SPECIAL INSPECTIONS
5-31. EACH 2500 HOURS OF TAIL ROTOR DRIVE SYSTEM OPERATION (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER