BHT-412-MM-2
5-00-00
Page 34 Rev. 16 26 FEB 2013
Export Classification C, ECCN EAR99
5. Torque check intermediate gearbox mounting bolts by
applying torque in tightening direction, do not exceed
50 inch-pounds (5.65 Nm). If any bolt turns under torque,
inspect attachment hardware and intermediate gearbox for
serviceability.
Chapter 67 6. Inspect elevator attachment lugs at each end of elevator
horn for cracks and security of attachment. Check elevator horn
to elevator spar attaching bolts and surrounding joint for cracks
and security of attachment.
Chapter 53 7. Inspect vertical fin spar caps for cracks and corrosion.
8. Inspect vertical fin spar caps forward side and web from
upper tailboom skin to approximately 4.0 inches (101.6 mm)
below upper tailboom skin as follows: Remove aft tailboom
access door. Face aft and use bright light and small mirror to
inspect area for cracks, especially near rivets holes.
Step 9 and step 10 pertain to helicopters modified
with the BLR FastFin™ system kit 412-705-040-101.
For helicopters equipped with the Dual Tailboom
Strakes and FastFin™ system Supplemental Type
Certificate (STC), refer to the applicable BLR
Aerospace documents for inspection criteria.
9. Inspect upper and lower tail fairings for visible damage to
the exterior skin and cracks at the attachment points. If paint is
missing locally or has scratches, inspect the fairing for
delamination and voids with a tap hammer. Inspect fairings for
loose or missing attaching hardware.
10. Inspect upper and lower strakes for visible damage,
deformation, cracks at the attachment points, and loose or
missing rivets.
If necessary, clean area with cloth dampened with
MEK (C-309) or equivalent. Ventilate area to prevent
breathing fumes.
5-6. 100 HOUR/12 MONTH INSPECTION — PART A (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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