Textron Bell 412, Maintenance Manual

Page: 230 / 288

BHT-412-MM-2
5-00-00
Page 182
Rev. 16 26 FEB 2013 Export Classification C, ECCN EAR99
19. Check bearing set 204-040-424 for smoothness and
freedom from binding by rotating pinion 412-040-302 by hand.
20. Remove main case assembly. Visually inspect upper and
lower flanges and pilot diameters for evidence of fretting and
wear.
21. Visually inspect the rollers of bearing 204-040-271 for
evidence of skidding, scoring, and end damage. Do not remove
bearing from case.
22. Visually inspect the rollers of 205-040-249 bearing for any
damage. Do not remove from main case.
BHT-412-CR&O 23. Inspect 212-040-208 quill assembly:
a. Remove drive and sump assembly 212-040-365 from
support case assembly 212-040-054.
b. Remove adapter 212-040-206. Inspect both splines for
evidence of damage and/or wear.
c. Check installation of cotter pin six places.
d. Visually inspect for proper installation of retainer.
e. Visually inspect gear 212-040-201 teeth and pinion
212-040-202 teeth for evidence for wear, scoring, and pitting.
f. Manually turn pinion and check bearings for
smoothness of rotation and freedom from binding.
BHT-412-CR&O 24. Inspect components in case assembly 212-040-054:
a. Visually inspect mating flange and pilot diameter of
support case at main case joint for evidence of corrosion,
fretting, and/or wear.
b. Remove lift link fitting.
c. Visually inspect lift link fitting pads for evidence of
fretting and wear.
d. Visually inspect bearing rollers for evidence of damage.
SPECIAL INSPECTIONS
5-34. EACH 3000 HOURS OF TRANSMISSION (412-040-004) OPERATION (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER