# SDR 99ZZZX1802

- Type: Service difficulty report (as reported; unverified)
- 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](https://openairdocs.org/jasc/7230)
- Part: Seal Assy
- Part number: 411104059
- Condition: Damaged
- Location: Labyrinth
- Part time: 1,775 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX1802

## Discrepancy

EXCESSIVE WARPAGE WHICH RESULTED IN COLLATERAL DAMAGE TO THE GP ROTOR AND SHROUD.  REPLACED WITH NEW UNIT, CORRECTED PROBLEM.

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