# SDR 95ZZZX5242

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 1, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N166K](https://openairdocs.org/aircraft/N166K), registered now
- Make and model: Beech 1900D
- Registry model: [Beech 1900D](https://openairdocs.org/model/beech-1900d) (OpenAirDocs)
- Aircraft serial: UE63
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Duct
- Part number: 1299103391
- Condition: Broken
- Location: Lt Eng Bleed
- Part time: 2,267 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/95ZZZX5242

## Discrepancy

A THIRTY DEGREE SPLIT IN ITT WAS REPORTED WITH LEFT ENGINE RUNNING HIGHER THAN RIGHT.  A POWER ASSURANCE RUN VERIFIED A PROBLEM WITH THE LEFT BLEED AIR CONTROL SYSTEM.  FUNCTIONAL CHECKS OF THE LEFT BLEED SYSTEM WERE UNRELIABLE AND DID NOT AGREE WITH TROUBLESHOOTING NARRATIVES IN THE BEECH 1900D MM.  A VISUAL INSPECTION REVEALED THE LEFT BLEED AIR DUCT WAS BROKEN AT THE TEMPERATURE CONTROL BOSS.  THE DUCT WAS REPLACED WITH A NEW UNIT.

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