# SDR 2011FA0000203

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 25, 2011
- Submitted: March 25, 2011
- Operation: General aviation
- Aircraft: [N8112T](https://openairdocs.org/aircraft/N8112T), registered now
- Make and model: Beech F33A
- Registry model: [Beech F33A](https://openairdocs.org/model/beech-f33a) (OpenAirDocs)
- Aircraft serial: CE1539
- Aircraft time: 20,848 hours
- Engine: Cont IO520BB
- Engine time: 1,250 hours
- Propeller: Hartzl PHCC3YF1
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Pump
- Part number: AA3216CW
- Part serial: I452303
- Condition: Faulty
- Location: Engine
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2011FA0000203

## Discrepancy

PILOT REPORTED INSTRUMENT AIR PRESSURE WAS LOW AT 1700 RPM.  UPON TROUBLESHOOTING THE MECHANIC NOTICED ON INITIAL RUN UP PRESSURES WERE WITHIN LIMITS, AFTER ENGINE STARTED TO WARM UP THE PRESSURE STARTED TO DROP BELOW LIMITS. INSTALLED NEW AIR PUMP SYS WORKED NORMAL.  NO PROBABLE CAUSE OR RECOMMENDATIONS AT THIS TIME.

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