What was found
LABYRINTH SEAL HAD EXCESSIVE WARPAGE WHICH RESULTED IN COLLATERAL DAMAGE TO THE GP ROTOR AND SHROUD. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.
- Difficulty date
- March 28, 1999
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N420MB
- Make and model
- Bolkms BK117A3
- Aircraft serial
- 7077
- Engine
- Lyc LTS101650B1
- System (JASC)
- 7230 · Turbine Engine Compressor Section
- Part
- Labyrinth Seal
- Part number
- 411104059
- Condition
- Warped
- Location
- Gas Producer
- Part time
- 1,775 hours
- Stage of operation
- IN
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.