# SDR 29GA2019020600001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 6, 2019
- Submitted: February 15, 2019
- Operation: Air carrier
- Aircraft: N331AG
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B430
- Aircraft time: 35,639 hours, 38,816 cycles
- Engine: Ge CT79B
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Uplock Switch
- Part number: MS213212
- Condition: Failed
- Location: Mlg
- Stage of operation: AP
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/29GA2019020600001

## Discrepancy

FLIGHT# 0082 WHEN GEAR HANDLE WAS PUT TO DOWN POSITION HYD PUMP BEGAN NORMAL OPERATION BUT W/IN 2-3 SECONDS OF TRANSITION A LOUD THUMP WAS HEARD IN THE AREA OFTHE NOSE GEAR. TRANSITION TIME WAS NORMAL WITH 3 DOWN AND LOCKED INDICATION. THERE WAS NOT ABNORMAL VISUAL INDICATION OF THE NOSE GEAR UPON POST FLIGHT INSPECTION.  R&R RH MLG UPLOCK SWITCH IAW AMM 32-61-15-02 OPS CHECKED GOOD.

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