# SDR IPXA3576822

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 22, 2013
- Submitted: January 25, 2013
- Operation: Air carrier
- Aircraft: [N427UP](https://openairdocs.org/aircraft/N427UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25458
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Condition: Inoperative
- Location: Cockpit
- Stage of operation: AP
- How discovered: O
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA3576822

## Discrepancy

EMERGENCY DECLARED,  ACFT SUDDENLY PITCHED UP AND TRIM SEEMED TO RUNAWAY.  TROUBLESHOT, R & R LT ADC SYS TESTED OK IAW MM 34-12-00-71-001.  LT SAM TO BE CHANGED.  PN 044 4040-800-912, SN OFF 92053291.  R & R LT STAB TRIM ELEVATOR ASSYMMETRY LIMIT MODULE AND TESTED GOOD IAW MM 27-09-00-712-014.  PH OFF 285T0015.  SN OFF D03055.

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