# SDR CALA2017050501256

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 5, 2017
- Submitted: May 5, 2017
- Operation: Air carrier
- Aircraft: [N851UA](https://openairdocs.org/aircraft/N851UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 1664
- Aircraft time: 49,844 hours, 21,214 cycles
- System (JASC): [3416 · Altimeter, Barometric/Encoder](https://openairdocs.org/jasc/3416)
- Part: Altimeter
- Part number: 641415801
- Part serial: 6785
- Condition: Faulty
- Location: Cockpit
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2017050501256

## Discrepancy

STBY ALTIMETER STICKS AND THEN JUMPS 500-600 FEET DURING DESCENT. INSTALLED ALTIMETER PER AMM 34-21-22.

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