# SDR DALA2017100407320

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 3, 2017
- Submitted: October 6, 2017
- Operation: Air carrier
- Aircraft: [N678DL](https://openairdocs.org/aircraft/N678DL), registered now
- Make and model: Boeing 757232
- Aircraft serial: 25983
- Aircraft time: 80,123 hours, 35,669 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Condition: Malfunctioned
- Location: Right
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2017100407320

## Discrepancy

DURING CLIMB OUT,  ALTITUDE DISAGREE EICAS MESSAGE AT FL 280,  CAPTAIN`S ALTIMETER 28,000 FT, STANBY ALTIMETER 27, 920 FT, AND FIRST OFFICER`S ALTIMETER 27, 680 FT. CTR NR 1 AUTOPILOT,  ATC SHOWED FL 280 EXACTLY.  TROUBLESHOT IAW FIM. REPLACED THE RT ADC. OPS CHECKED GOOD.

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