Textron Bell 412 - 5-23. EACH 600 HOURS OF TAIL ROTOR DRIVESHAFT OPERATION OR 12 MONTHS; TAIL ROTOR DRIVESHAFT FLEXIBLE COUPLINGS

BHT-412-MM-2
5-00-00
7 NOV 2016 Rev. 25 Page 133
Export Classification C, ECCN EAR99
SPECIAL INSPECTIONS
5-23. EACH 600 HOURS OF TAIL ROTOR DRIVESHAFT OPERATION OR 12 MONTHS
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
DATE: __________________W.O. _____________________
FACILITY: __________________________________________
HELICOPTER S/N: ___________________________________
REGISTRY NO.: _____________________________________
TOTAL TIME:_______________________________________
SIGNATURE:________________________________________
NOTE
Accomplish each 600 hours of tail rotor driveshaft
operation or 12 months, whichever occurs first (no
Non Destructive Inspection (NDI) required.
Chapter 65 TAIL ROTOR DRIVESHAFT FLEXIBLE COUPLINGS
NOTE
Applicable to S/N 33001 through 33213 and 36001
through 36019 not modified by 412-570-001-103 or
Pre BHT-412-SI-74 (412SP to 412HP Upgrade).
1. Remove tail rotor driveshaft assemblies.
2. Remove four tail rotor hanger assemblies
212-040-600-ALL.
NOTE
Disassemble flexible couplings only to the extent
necessary to remove old grease and repack.
BHT-412-CR&O,
Chapter 65
3. Clean, visually inspect, and repack tail rotor hanger
assembly flexible couplings.