# SDR NOCA21906

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 26, 2006
- Submitted: December 18, 2006
- Operation: Air carrier
- Aircraft: [N755NA](https://openairdocs.org/aircraft/N755NA), registered now
- Make and model: Boeing 757-28A
- Registry model: [Boeing 757-28A](https://openairdocs.org/model/boeing-757-28a) (OpenAirDocs)
- Aircraft serial: 30043
- System (JASC): [3416 · Altimeter, Barometric/Encoder](https://openairdocs.org/jasc/3416)
- Part: Altimeter
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NOCA21906

## Discrepancy

ON DESCENT F/O'S ALTIMETER HAD AN OFF FLAG.  OFF FLAG NOT IN VIEW AT THIS TIME, RESET CONNECTOR, PERFORMED AIR DATA INSTRUMENT TEST MM 34-12-00.  OPS CHECKED OKAY.

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