BHT-412-MM-2
5-00-00
Page 74 Rev. 16 26 FEB 2013
Export Classification C, ECCN EAR99
COUNTERWEIGHT BELLCRANK RETENTION
NUT MS14145L6, OR ITS EQUIVALENT
MS17826-6, IS DESIGNATED AS ONE TIME USE
ONLY. IF MAINTENANCE ACTION REQUIRES
THAT IT BE REMOVED, THE COUNTERWEIGHT
BELLCRANK NUT IS TO BE DISCARDED AND
REPLACED WITH A NEW NUT. OVERTORQUING
OR INCORRECT APPLICATION OF THE NUT
COULD CAUSE MECHANICAL FAILURE
RESULTING IN EXCESSIVE VIBRATION OR
DAMAGE TO THE TAIL ROTOR BLADES.
a. Inspect the tail rotor counterweight bellcrank
212-011-705-001 retention nuts for cracks, corrosion, and
security. Reapply corrosion preventive compound (C-101) if
nuts are not completely covered.
CABIN ROOF
Chapter 52
Chapter 53
1. Cabin structure and cowlings/fairings for condition.
Chapter 63 2. Transmission and transmission oil lines for condition,
corrosion, and leaks.
Chapter 63
BHT-412-SI-12
3. Rotor brake quill, disc, and brake assembly (if installed):
a. Brake quill for condition, damage, and leakage.
b. Brake disc for condition, damage, security, warpage,
and evidence of overheat.
c. Caliper switches and wiring for condition and security
of attachment.
Chapter 29 4. Hydraulic systems:
a. Hydraulic system 1 and 2 pumps for leakage, damage,
and security.
5-9. 25 HOUR/30 DAY INSPECTION — PART B (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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