Textron Bell 412, Руководство по обслуживанию

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BHT-412-MM-2
5-00-00
Page 36
Rev. 16 26 FEB 2013 Export Classification C, ECCN EAR99
2. Inspect pitch horns for corrosion and cracks in areas
surrounding torque transfer pin holes. No cracks permitted.
3. Inspect pivot bearings, spindle bearings, and damper set
for elastomeric bearing delamination, elastomer degradation,
shim cracks, crazing, cracking, or sheeting.
4. Inspect damper bearing bumper pads for deterioration or
deformation due to contact with yoke.
5. Torque check eight yoke assembly through bolt nuts to 70
to 80 foot-pounds (95 to 108 Nm).
6. Make sure bolts EWB0420 are installed (16 places) for
simple pendulum absorber bracket. Torque check bolts. Apply
29 to 33 foot-pounds (39 to 45 Nm).
7. Functionally check arm and bearing (pendulum)
assemblies. Apply a minimum of 5 pounds (22.24 N) of force to
each arm and bearing assembly (force toward center of yoke).
Cycle arm and bearing through full travel.
8. Apply force away from center of yoke. Arm and bearing
assembly should cycle free and smooth. Roughness and
binding are not acceptable.
9. Functionally check droop restraint system. Check for
engagement of restraint arms in lower detent of cam window.
Relieve load on each blade and verify lower clevis moves freely
through cam window envelope. Binding and roughness in
inboard clevis is not acceptable.
Chapter 62 MAIN ROTOR CONTROLS
NOTE
Disconnect pitch link upper rod ends from the pitch
horns to determine main rotor control bearing wear.
1. Swashplate and support assembly:
a. Inspect for condition and security with special attention
to gimbal ring attachment lugs.
SCHEDULED INSPECTIONS
5-6. 100 HOUR/12 MONTH INSPECTION — PART A (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER