# SDR AALA202108188141

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 14, 2021
- Submitted: August 18, 2021
- Operation: Air carrier
- Aircraft: [N904NN](https://openairdocs.org/aircraft/N904NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33317
- Aircraft time: 26,367 hours, 11,079 cycles
- System (JASC): [3444 · Ground Proximity System](https://openairdocs.org/jasc/3444)
- Part: Antenna
- Condition: Faulty
- Location: Radio Altimeter
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202108188141

## Discrepancy

AIRCRAFT WAS GROUNDED: LOSS OF AUTOPILOT, FLIGHT DECLARED EMERGENCY AND RETURNED TO FIELD. REPLACED #1 LOW RANGE RADIO ALTIMETER ANTENNA IAW AMM 34-33-00, OPS CHECK GOOD.

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