BHT-212-MM-1
5-00-00
Page 38 Rev. 14 26 JUN 2013
Export Classification C, ECCN EAR99
Chapter 62 MAIN ROTOR HUB
— Detailed Visual Inspection
1. Main rotor hub assembly (grips, drag braces, trunnion,
pillow blocks, static stops, and mast nut) for condition and
security.
2. Hub assembly for proper oil level or grease lubrication.
3. Main rotor yoke for evidence of cracks at pillow block
bushing bores. Proper sealing of pillow blocks, yoke, and
attaching through bolts, washers, nuts, and bushings.
4. Inspect blade retention bolts for condition and security.
Chapter 62 MAIN ROTOR CONTROLS
1. Swashplate and support assembly:
a. Inspect for condition and security.
The presence of black oxide powder will require
investigation to determine the cause.
b. Inspect gimble ring bearings, liners, and attaching
hardware for excessive looseness and wear. Gimble ring
bearing and attaching bolt axial or radial looseness shall not
exceed 0.005 inch (0.127 mm) and no binding is allowed.
2. Disconnect flight control tubes from swashplate and
collective lever assembly. Inspect six trunnion bearings
204-011-451-001 for 0.020 inch (0.508 mm) maximum axial
play. Rotate bearings 180° and purge lubricate.
3. Inspect collective levers for condition and evidence of
corrosion, and scissors and sleeve assembly for security and
condition.
4. Inspect stabilizer bar dampers clamps for condition and
evidence of corrosion.
5-9. 100 HOURS/12 CALENDAR MONTHS — PART A (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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