Textron Bell 412, Maintenance Manual

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BHT-412-MM-2
5-00-00
Page 204
Rev. 16 26 FEB 2013 Export Classification C, ECCN EAR99
b. Main rotor blades:
(1) Inspect main rotor blades skin for wrinkles and
deformation.
(2) If no discrepancies are found, main rotor blades
may be retained in service.
(3) If discrepancies are found, return all blades to an
authorized blade repair station. Make an entry in component
record to show reason for removal was overspeed. If known,
list percent of overspeed and duration.
Chapter 64 c. Tail rotor hub and blades:
(1) Remove tail rotor hub and blade assembly.
(2) Remove tail rotor blades.
(3) Replace tail rotor blade retention bolts.
d. Tail rotor blades:
BHT-412-CR&O (1) Perform Major Overspeed Inspection of tail rotor
blades.
(2) Make an entry in component record to show
reason for removal was overspeed.
e. Perform a close inspection of the following
components. If no visual damage is found, components may be
retained in service.
(1) Main transmission.
(2) Intermediate gearbox. Check gearbox for security
and retorque retaining bolts.
(3) Tail rotor gearbox. Check gearbox for security and
retorque retaining nuts.
(4) Main rotor mast
(5) Main input driveshaft
CONDITIONAL INSPECTIONS
5-39. AFTER OVERSPEED (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER