What was found
SLIGHT VIBRATION ON LANDING, CHECKED ROTOR SYSTEM ON POST FLIGHT AND FOUND FRAHM DAMPER SPRING MISALIGNED. MAINTENANCE FOUND BROKEN SPRING IN FRAHM DAMPER. REMOVED AND REPLACED FRAHM DAMPER.
- Difficulty date
- March 10, 2004
- Submitted
- April 12, 2004
- Operation
- Air carrier
- Aircraft
- N577AL
- Make and model
- Bell 407
- Aircraft serial
- 53247
- Engine
- Allsn 250C47B
- System (JASC)
- 6220 · Main Rotor Head
- Part
- Spring
- Condition
- Misaligned
- Location
- Frahm Damper
- Component
- Damper
- Component part number
- 407010150107
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.