# SDR CALA2017082802921

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2017
- Submitted: August 28, 2017
- Operation: Air carrier
- Aircraft: [N38727](https://openairdocs.org/aircraft/N38727), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28797
- Aircraft time: 60,221 hours, 20,444 cycles
- System (JASC): [3416 · Altimeter, Barometric/Encoder](https://openairdocs.org/jasc/3416)
- Part: Altimeter
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: NR
- 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/CALA2017082802921

## Discrepancy

CAPT ALTIMETER CLIMBED APPROX 900 FT AND RETURNED IN APPROX ONE SECOND. PERFORMED BIT/OP TEST OF LEFT AND RIGHT HAND ADIR'S UNITS. NO FAULTS FOUND SYS GROUND TEST GOOD IAW AMM 34-21-00.

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