BHT-407-MM-1
5-00-00
Export Classification C, ECCN EAR99
2.
Inspect the following gear teeth for scoring and other
mechanical damage.
a.
Input pinion gear.
b.
Spiral bevel gear.
3.
If any damage suspected to be related to the stall or surge
is found, make an entry on the Historical Service Record and
attach a tag on the tail rotor gearbox and write, “THIS
COMPONENT WAS REMOVED FROM SERVICE BECAUSE
OF A COMPRESSOR STALL”. Send the tail rotor gearbox to a
Bell Helicopter Textron approved facility for overhaul.
4.
If no defects were detected on the gears, the tail rotor
gearbox is serviceable.
Chapter 53
FUSELAGE
1.
Examine the complete tailboom structure for distortion,
buckles, cracks in the skin, and sheared or loose rivets.
2.
Inspect tailboom attachment fittings for cracks.
3.
Inspect the vertical fin for condition and security of
attachment.
Chapter 63
Chapter 65
GROUND RUN
BHT-407-FM-X
1.
Perform a ground run for a minimum of 30 minutes with the
helicopter light on its skids. Remove and examine the chip
detectors of the transmission assembly, freewheel assembly,
and tail rotor gearbox.
2.
If any of the chip detectors show signs of metal particles,
perform a serviceability check. Components that fail the
serviceability check shall be removed. Make an entry on the
applicable components Historical Service Record and attach a
tag and write, “THIS COMPONENT WAS REMOVED FROM
SERVICE BECAUSE OF A COMPRESSOR STALL/SURGE”.
Send the component to a Bell Helicopter Textron approved
facility for overhaul.
CONDITIONAL INSPECTIONS
5-31A. ENGINE COMPRESSOR STALL OR SURGE (CONT)
DATA REFERENCE
INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
Page 82F
Rev. 46
1 MAR 2018
