# SDR IPXA09M57134

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 25, 2009
- Submitted: August 26, 2009
- Operation: Air carrier
- Aircraft: [N256UP](https://openairdocs.org/aircraft/N256UP), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48405
- System (JASC): [3411 · Pitot/Static System](https://openairdocs.org/jasc/3411)
- Part: Pitot Tube
- Part number: 851DK
- Condition: Obstructed
- Location: Pitot/Static Sys
- Stage of operation: CL
- How discovered: O
- Nature of condition: S
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA09M57134

## Discrepancy

INSPECTION TYPE:N/A NUMEROUS ERRONEOUS INDICATIONS STARTING AFTER V-1 LEAD TO PERFORMING AN AIRSPEED LOST CHECKLIST, SUSPECT NR 2 ADC BAD DATA.  FOUND OBSTRUCTIONS IN F/O AND AUX PITOT TUBES.  CLEANED AS REQ'D AND OPS CHECKED PER MM 34-11-00-2.  OPS AND LEAK CHECK GOOD.

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