# SDR R2J2004F00004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 15, 2004
- Submitted: October 22, 2004
- Operation: Air carrier
- Aircraft: [N361MA](https://openairdocs.org/aircraft/N361MA), registered now
- Make and model: Mtsbsi MU2B40
- Aircraft serial: 429SA
- Engine: Garrtt TPE33110
- System (JASC): [7220 · Turbine Engine Air Inlet Section](https://openairdocs.org/jasc/7220)
- Part: Duct
- Part number: 31018303
- Condition: Failed
- Location: Engine
- Part time: 4,055 hours
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/R2J2004F00004

## Discrepancy

ENGINE EGT SUDDENLY ROSE IN FLIGHT AND POWER HAD TO BE REDUCED.  SAFE LANDING ACCOMPLISHED AT HOME BASE TROUBLESHOOTING REVEALED THE COMPRESSOR CROSSOVER DUCT (DIFFUSER) HAD FAILED, CAUSING LOW COMPRESSOR PERFORMANCE.  A VANE HAD BROKEN OFF AND LODGED, PREVENTING CATASTROPHIC FAILURE OF COMPONENTS DOWNSTREAM.  INVESTIGATION REVEALED THIS PART WAS REQUIRED TO BE REPLACED WITH AN UPGRADED DUCT LESS PRONE TO FAILURE AT ETH ENGINE TBO EXTENSION, WHICH WAS RECORDED IN THE MAINTENANCE RECORDS AS HAVING BEEN ACCOMPLISHED AT AN EARLIER TIME AND THE ENGINE CERTIFIED TO MEET THE 5400 HOUR TBO.  (EA21200502933)

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