# SDR MALA040117

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 14, 2004
- Submitted: January 21, 2004
- Operation: Air carrier
- Aircraft: N420XJ
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B420
- Aircraft time: 2,520 hours, 2,699 cycles
- Engine: Ge CT79B
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Failed
- Location: Left
- Stage of operation: CR
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MALA040117

## Discrepancy

LT ENG FAILED INFLIGHT.  ONE STAGE 1 TURBINE BLADE SEPARATED FROM DISK BELOW BLADE PLATFORM, BLADE IMPALED IN STAGE 1 SHROUD.  STAGE 1 ROTOR CONTINUED TO ROTATE, REMAINING 33 STAGE 1 TURBINE BLADES MACHINED OFF BY IMPALED BLADE.  DEBRIS FROM 34 STAGE 1 TURBINE BLADES EXITED TAILPIPE.  NO INTACT TURBINE BLADES STAGES 1, 2, 3 & 4 DISKS.  DAMAGE STAGE 2, 3 & 4 TURBINE NOZZLES.  TWO OF POWER TURBINE STRUTS SPLIT OPEN, L/E & METAL PEELED BACK.  REMAINING 6 STRUTS DAMAGED.  STAGE 3 TURBINE BRAIDED SEAL MATL PROTRUDING FROM HOLE STAGE 4 TURBINE NOZZLE.  HEAT DAMAGE.  OIL LVL FULL, COLOR NORM.  STAGE 1 TURBINE BLADES NEW, ACCUMULATED 2520 HRS/2699 CYC.  NO ENG PARAMETER ABNORM PRIOR TO EVENT.  ENG SENT TO H&S.

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