# SDR USAA2012092100004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 2012
- Submitted: September 21, 2012
- Operation: Air carrier
- Aircraft: [N433US](https://openairdocs.org/aircraft/N433US), registered now
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24555
- Aircraft time: 60,684 hours, 40,435 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Circuit Card
- Condition: Faulty
- Location: Landing Gear
- Stage of operation: AP
- How discovered: O
- Nature of condition: N
- Precautionary procedure: L
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2012092100004

## Discrepancy

ON APPROACH TO MIA, CREW REPORTED NO LANDING GEAR INDICATIONS EXCEPT FOR RED NOSE GEAR LIGHT WHICH REMAINS ILLUMINATED.  CREW ACCOMPLISHED A GO-AROUND AND MANUAL GEAR EXTENSION.  NORMAL GEAR EXTENSION.  AIR GROUND CIRCUIT BREAKER WILL NOT RESET.  FLIGHT LANDED WITHOUT INCIDENT.  MAINTENANCE REPLACED M983 CIRCUIT CARD IAW 32-09-20-404-007, 32-09-20-324-104 AND 32-09-20-724-015.  ALSO, REPLACED C194 LANDING GEAR AIR/GROUND RELAY AND LIGHTS CIRCUIT BREAKER IAW MPPM 54-01-10.  OPS CHECK GOOD.

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