Textron Bell 412, Maintenance Manual

Page: 89 / 288

BHT-412-MM-2
5-00-00
Export Classification C, ECCN EAR99
3. Tailboom and fin external skin for damage, corrosion, and
cracks.
4. Tailboom access panels and covers for condition and
attachment. Tail rotor driveshaft cover hinges for wear.
5. Tailboom baggage compartment door for condition,
attachment, and door handle operation.
6. Tailboom baggage compartment interior for damage,
panels for disbonding, and corrosion. Longerons above roof
panel for corrosion and cracks. Longerons below floor panel for
corrosion and cracks.
7. Tailboom interior bulkheads and stringers for cracks and
corrosion.
8. Intermediate gearbox mount pad for damage, cracks,
fretting, and corrosion.
9. Tail rotor gearbox support fitting assembly for damage,
cracks, fretting, and corrosion. Pay particular attention to
mounting holes and lugs.
10. Tailboom exterior bonded panels adjacent to baggage
compartment for damage, delamination, and corrosion.
11. With a borescope or equivalent, inspect interior structure
of vertical fin for cracks, corrosion, fretting, and damage.
12. Control tube fairleads (grommets and guides) for wear and
security of attachment.
SCHEDULED INSPECTIONS
5-8. 5000 HOUR/5 YEAR INSPECTION — PART A (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
15 DEC 2015 Rev. 23 Page 56A