# SDR CALA2017122004546

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 20, 2017
- Submitted: December 20, 2017
- Operation: Air carrier
- Aircraft: [N37253](https://openairdocs.org/aircraft/N37253), registered now
- Make and model: Boeing 737824
- Aircraft serial: 30584
- Aircraft time: 56,167 hours, 19,956 cycles
- System (JASC): [3416 · Altimeter, Barometric/Encoder](https://openairdocs.org/jasc/3416)
- Part: Altimeter
- Part number: WL102AMS3
- Part serial: 0496
- Condition: Out Of Tolerance
- Location: Cockpit
- Part time: 44,183 hours, 15,568 cycles
- 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/CALA2017122004546

## Discrepancy

STBY ALTIMETER STOPS MOVEMENT ERRATICALLY DURING DESCENT. THEN JUMPS 500 FEET REMOVED AND REPLACED STBY ALTIMETER PER AMM REF34-13-01 400-801 OPS CHECK GOOD.

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