# SDR SWAA2021031154227

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 10, 2021
- Submitted: March 11, 2021
- Operation: Air carrier
- Aircraft: N409WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 27896
- Aircraft time: 65,568 hours, 38,913 cycles
- System (JASC): [3231 · Landing Gear Door Retract Section](https://openairdocs.org/jasc/3231)
- Part: Control Module
- Part number: 273A33016
- Part serial: D00983
- Condition: Faulty
- Location: Cockpit
- Stage of operation: AP
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2021031154227

## Discrepancy

LANDING GEAR DOWN. MAIN GEAR INDICATIONS GEAR IN TRANSIT. BOTH GREEN & RED LIGHTS ON. I PHYSICALLY TAPPED THE GEAR HANDLE AND THE LIGHTS WENT GREEN. THE UPPER GEAR LIGHTS WERE GREEN THE ENTIRE TIME. WE RECEIVED A TOO LOW GEAR GPWS AT 400 FEET / DEFECT TRANSFERRED TO NON ROUTINE CARD D167076. LANDING GEAR CONTROL LEVER MODULE REPLACED. REF NRC D167076 FOR WORK PERFORMED.

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