# SDR 05FDEA00316

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 24, 2005
- Submitted: February 24, 2005
- Operation: Air carrier
- Aircraft: [N599FE](https://openairdocs.org/aircraft/N599FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48598
- Aircraft time: 41,432 hours, 6,137 cycles
- System (JASC): [3411 · Pitot/Static System](https://openairdocs.org/jasc/3411)
- Part: Pitot Line
- Condition: Obstructed
- Location: First Officers
- Stage of operation: CR
- How discovered: O
- Nature of condition: G, J
- Precautionary procedure: J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/05FDEA00316

## Discrepancy

FL 340 CLR AIR, A/P DISCON, NEITHER A/P AVBL, IAS COMPARATOR F/O A/S INDICATED   UPPER FOOT, RAN QRH AIRSPEED LOST, SUSPECT, ERRATIC CHECKLIST, DETERMINED   F/O'S A/S ERRONEOUS BY 25 KIAS.  F/O SELECTED ALT STATIC SOURCE IAS COMPARATOR  DISAPPEARED AND A/S MATCHED.  DUMPED 10,000 LBS OF FUEL. DIVERTED TO OAK.  INSPECTED FIRST OFFICERS PITOT TUBE AND FOUND PITOT DRAIN HOLE BLOCKED.  REMOVED BLOCKAGE AND APPLIED DRY NITROGEN CLEANING OUT LINE MM 34-11-00-2.  PERFORMED PITOT STATIC SYS TEST ON F/O AND STBY AIRSPEED INDICATOR.  ALL INDICATIONS WITHIN LIMITS.  PERFORMED RTS OF MSC AIR DATA HEATERS TEST PASSED.  A/C OK TO CONTINUE.

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