# SDR CALA2017103003858

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 30, 2017
- Submitted: October 30, 2017
- Operation: Air carrier
- Aircraft: [N35407](https://openairdocs.org/aircraft/N35407), registered now
- Make and model: Boeing 737924
- Aircraft serial: 30124
- Aircraft time: 49,787 hours, 20,074 cycles
- System (JASC): [3420 · Attitude and Direction Data System](https://openairdocs.org/jasc/3420)
- Part: Air Data Module
- Part number: C17001CA01
- Part serial: 4350
- Condition: Faulty
- Location: Cockpit
- Part time: 49,763 hours, 20,065 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/CALA2017103003858

## Discrepancy

CAPT ALTIMETER ROLLING UP AND DOWN 3000 FT WHILE DESCENDING REMOVED AND REPLACED LEFT ADM IAW AMM 34-21-04-000-802. ALL TESTS PASSED. ACCOMPLISHED LAND VERIFY PER AMM 22-11-00. AC REMAINS FULL CAT II/III LAND STATUS.

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