# SDR 05FDEA00215

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 2005
- Submitted: February 3, 2005
- Operation: Air carrier
- Aircraft: N389FE
- Make and model: Doug DC-10-10
- Registry model: [Doug DC-10-10](https://openairdocs.org/model/mcdonnell-douglas-dc-10-10) (OpenAirDocs)
- Aircraft serial: 46623
- Aircraft time: 68,345 hours, 27,693 cycles
- System (JASC): [3414 · Airspeed/Mach Indicator](https://openairdocs.org/jasc/3414)
- Part: Indicator
- Condition: Inaccurate
- Location: Cockpit
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/05FDEA00215

## Discrepancy

A 70 KT DIFFERENCE BETWEEN CAPT & F/O MACH VMO FLAG INDICATOR.  CAPT SHOWING 250 & F/O SHOWING 340 AT FL 260 MACH WARNING HORN WAS GOING OFF.  ATB MHT.  T/S SYSTEM PER TAFI 34-13-00 REPLACED NR 1 CADC AND MACH AIRSPEED INDICATOR.  CLEANED PITOT LINES WITH NITROGEN NO OBSTRUCTIONS FOUND.  PERFORMED PITOT TEST OF SYSTEM BOTH CAPT & F/O INDICATORS CHECK NORMAL.  RETURNED TO SERVICE.

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