# SDR AALA202504087941

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 7, 2025
- Submitted: April 8, 2025
- Operation: Air carrier
- Aircraft: [N300UB](https://openairdocs.org/aircraft/N300UB), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 44506
- Aircraft time: 580 hours, 223 cycles
- System (JASC): [3433 · Microwave Landing System](https://openairdocs.org/jasc/3433)
- Part: Altimeter
- Part number: 8220334005
- Part serial: 4G5XRK
- Condition: False Indication
- Location: Zone 100
- Part time: 11,490 hours, 4,977 cycles
- Stage of operation: DE
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202504087941

## Discrepancy

AIRCRAFT WAS GROUNDED: LANDING GEAR WARNING HORN AND GEAR UNSAFE LIGHTS ILLUMINATED MULTIPLE TIMES DURING DESCENT. REPLACED NUMBER 2 RADIO ALTIMETER.

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