Textron Bell 412, Maintenance Manual

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BHT-412-MM-2
5-00-00
26 FEB 2013 Rev. 16 Page 181 Export Classification C, ECCN EAR99
a. If the index marks indicate movement between gear
and inner race of bearing set, remove gear 412-040-701, plate
204-040-357, shim 204-040-348, bearing set 205-040-245, and
shim 204-040-350.
b. Visually inspect inside diameter of bearing set
205-040-245 for signs of spinning. Visually inspect bearing
journal on gear 412-040-701 for sign of fretting. Inspect detail
components to determine cause for inner race rotation.
14. Visually inspect drive and coast side of gear 412-040-701
teeth for wear, scoring, pitting, and contact pattern. Visually
inspect upper and lower spline teeth for excessive wear and/or
damage.
15. Visually inspect roller bearing race on lower end of gear for
evidence of skidding, scoring, pitting, or damage.
16. Visually inspect splines on the upper and lower end of gear
for damage and/or wear.
17. Visually inspect drive and coast side of pinion 412-040-700
teeth for excessive wear, scoring, pitting, and contact pattern.
Visually inspect vibro-etched index marks on pinion
412-040-700 and bearing set 214-040-118 for alignment.
Inspection may be accomplished with input quill installed by
viewing pinion shaft and bearing inner race between teeth and
main case.
a. If index marks indicate rotational movement between
pinion and inner race of bearing set, quill 412-040-263 shall be
removed from main case. Disassemble quill to remove pinion
412-040-700 and bearing set 214-040-118.
b. Visually inspect pinion bearing journal for signs of
fretting and bearing inner race spinning. Clean sleeve
412-040-137 with drycleaning solvent (C-304). Visually verify oil
holes in sleeve are free of any foreign material. Inspect detail
components to determine cause for inner race rotation.
BHT-412-CR&O 18. Visually inspect teeth of pinion 412-040-302 in quill
assembly 204-040-379 for wear, scoring, pitting, and gear tooth
contact pattern. Inspect internal spline of pinion for wear and
general condition.
SPECIAL INSPECTIONS
5-34. EACH 3000 HOURS OF TRANSMISSION (412-040-004) OPERATION (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER