Textron Bell 412 - 5-32. EACH 3000 HOURS OF MAIN ROTOR MAST (412-040-366-103 AND -105) OPERATION; MAIN ROTOR MAST (412-040-366-103 AND 412-040-366-105)

BHT-412-MM-2
5-00-00
26 FEB 2013 Rev. 16 Page 169
Export Classification C, ECCN EAR99
SPECIAL INSPECTIONS
5-32. EACH 3000 HOURS OF MAIN ROTOR MAST (412-040-366-103 AND -105)
OPERATION
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
DATE: __________________W.O. _____________________
FACILITY: __________________________________________
HELICOPTER S/N: ___________________________________
REGISTRY NO.: _____________________________________
TOTAL TIME:_______________________________________
SIGNATURE:________________________________________
NOTE
Accomplish each 3000 hours of main rotor mast
(412-040-366-103 and -105) operation on
helicopters S/N 33001 through 33213 and S/N
36001 through 36019 not modified by
412-570-001-103 or BHT-412-SI-74 (412SP to
412HP Upgrade).
MAIN R
OTOR MAST (412-040-366-103 AND
412-040-366-105)
NOTE
Prior to removing mast assembly from transmission,
check chip detector, located in top case, for
evidence of debris. Presence of ferrous foreign
material on chip detector will require additional
inspection to determine origin.
Chapter 63
BHT-412-CR&O
1. Remove main rotor mast assembly from transmission.