# SDR MALA976147

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 12, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N421XJ
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 421
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Control Unit
- Condition: Failed
- Location: Landing Gear
- Stage of operation: LD
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MALA976147

## Discrepancy

ON LANDING, LANDING GEAR WOULD NOT EXTEND, CB F7 POPPED, RESET AND GEAR CAME DOWN.  MAINTENANCE JACKED AIRCRAFT AND SWUNG GEAR, ALL CHECKS GOOD.  AS A PRECAUTIONARY MEASURE MAINTENANCE REPLACED THE LANDING GEAR CONTROL UNIT PN D494-12-001.  ALL WORK DONE IAW SF340 MM 32-31-05.

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