# SDR AALA202301130343

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 11, 2023
- Submitted: January 13, 2023
- Operation: Air carrier
- Aircraft: [N997NN](https://openairdocs.org/aircraft/N997NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33250
- Aircraft time: 18,150 hours, 7,584 cycles
- System (JASC): [3457 · Global Positioning System](https://openairdocs.org/jasc/3457)
- Part: Antenna
- Part number: AT575343W
- Part serial: 25492
- Condition: Faulted
- Location: Gps
- Part time: 3,736 hours, 1,633 cycles
- Stage of operation: CR
- 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/AALA202301130343

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: AIRCRAFT MASTER CAUTION ILLUMINATED - INERTIAL REFERENCE SYSTEM GPS LIGHT ILLUMINATED ON OVERHEAD PANEL. FLIGHT MANAGEMENT COMPUTER SCRATCH PAD DISPLAY INVALID L - GPS AND INVALID R- GPS. FLIGHT DIVERTED TO MEM. REMOVED AND REPLACED BOTH GPS ANTENNAS, M2103 (AALA202301139418) AND M2102 (AALA202301130343).

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