What was found
DURING 25 HOUR AD INSPECTION, THE COUPLING IS CRACKED, PROBABLE CAUSE IS EXCESSIVE RIGIDITY IN THE BEARING MOUNT SYSTEM. ALLOW TAILROTOR DRIVESHAFT TO FLOAT SO DISC PACKS DO NOT FLEX AS MUCH OR AS OFTEN. (M)
- Difficulty date
- August 23, 2001
- Submitted
- November 5, 2001
- Operation
- Air carrier
- Aircraft
- N547AL
- Make and model
- Bell 407
- Aircraft serial
- 53240
- System (JASC)
- 6510 · Tail Rotor Drive Shaft
- Part
- Disc Pack
- Part number
- 407340340101
- Condition
- Cracked
- Location
- Tail Rotor
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.