Textron Bell 412, Maintenance Manual

Page: 125 / 288

BHT-412-MM-2
5-00-00
01 JUN 2018 Rev. 26 Page 89 Export Classification C, ECCN EAR99
a. Hanger assemblies for cracks at mounting ears,
corrosion, and security of attachment.
b. Hanger supports for condition and security of
attachment.
c. Driveshaft sections and attaching hardware for
condition and security.
d. Coupling clamps for cracks in or near bolt lugs. Clamps
for proper position.
NOTE
Step 8 pertains to helicopters S/N 36020 through
36999, S/N 37002 through 37999, S/N 38001
through 38999, S/N 39101 through 39999, and
helicopters modified by 412-570-001-103 or Post
BHT-412-SI-74 (412SP to 412HP Upgrade).
Chapter 65 8. Tail rotor driveshaft:
a. Hanger assemblies for cracks at mounting ears,
corrosion, and security of attachment.
b. Hanger supports for condition and security of
attachment.
c. Driveshaft sections and attaching hardware for
condition and security.
d. Disc pack couplings and attaching hardware for
condition and security.
NOTE
Step 9 and step 10 do not pertain to helicopters
S/N 37002 through 37999, S/N 38001 through
38999, and S/N 39101 through 39999.
Chapter 65 9. Intermediate gearbox:
a. Chip detector for debris.
SCHEDULED INSPECTIONS
5-10. 300 HOUR/12 MONTH INSPECTION — PART B (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER