Textron Bell 412, Руководство по обслуживанию

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BHT-412-MM-2
5-00-00
2 SEP 2014 Rev. 20 Page 39 Export Classification C, ECCN EAR99
2. Torque check top case to ring gear case nuts, ring gear
case to main case nuts, and main case to support case nuts to
230 to 250 inch-pounds (25.99 to 28.25 Nm). Retorque as
required.
Chapter 64 TAIL ROTOR HUB AND BLADE ASSEMBLY
CAUTION
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
W I T H A N E W N U T. O V E R T O R Q U I N G O R
INCORRECT APPLICATION OF THE NUT COULD
CAUSE MECHANICAL FAILURE RESULTING IN
EXCESSIVE VIBRATION OR DAMAGE TO THE
TAIL ROTOR BLADES.
1. 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.
Every third 100 hour inspection (300 hours) or 12 months:
Chapter 18 1. Dynamically balance tail rotor.
2. Torque check nuts on tail rotor blade retention bolts.
3. Torque check tail rotor hub retaining nut.
Chapter 65 TAIL ROTOR GEARBOX
1. Inspect chip detector for debris. If metallic particles are
found, determine and correct cause.
2. Clean chip detector.
3. Test chip detector electrical circuit.
SCHEDULED INSPECTIONS
5-6. 100 HOUR/12 MONTH INSPECTION — PART A (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER