Textron Bell 412, Maintenance Manual

Page: 153 / 288

BHT-412-MM-2
5-00-00
Export Classification C, ECCN EAR99
SPECIAL INSPECTIONS
5-15. BETWEEN 1 AND 5 FLIGHT HOURS AFTER MAIN ROTOR HUB INSTALLATION
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
DATE: __________________W.O. _____________________
FACILITY: _________________ _________________________
HELICOPTER S/N: __________ _________________________
REGISTRY NO.: ____________ _________________________
TOTAL TIME:_______________________________________
SIGNATURE: _______________ _________________________
NOTE
Accomplish between 1 and 5 hours of flight after
installation of main rotor hub.
Chapter 62 MAIN ROTOR HUB
1. Torque check eight main rotor hub/yoke through bolt nuts
to 70 to 80 foot-pounds (95 to 108 Nm).
CAUTION
SPECIAL TORQUE SEQUENCE REQUIRED FOR
FOLLOWING STEPS.
2. Torque check eight main rotor hub cap bolt assemblies to
250 to 260 inch-pounds (28.25 to 29.37 Nm).
3. Torque check lower cone bolts to 125 to 135 inch-pounds
(14.13 to 15.26 Nm).
26 FEB 2013 Rev. 16 Page 113/114