# SDR COMA086365

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 21, 2008
- Submitted: September 5, 2008
- Operation: Air carrier
- Aircraft: [N451CA](https://openairdocs.org/aircraft/N451CA), registered now
- Make and model: Cndair CL6002B19
- Aircraft serial: 7562
- Aircraft time: 16,710 hours, 14,741 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Selector Valve
- Part number: 601R751461
- Part serial: 1682
- Condition: Malfunctioned
- Location: Mlg
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: L
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/COMA086365

## Discrepancy

ON APPROACH, RECEIVED TWO MASTER WARNINGS, ONE FOR NOSE GEAR OPEN, THE OTHER FOR GEAR DISAGREE.  ABORTED APPROACH, RAN QRH, MANUALLY EXTENDED GEAR, LANDED WITHOUT INCIDENT WITH GEAR INDICATING GREEN.  REPLACED NLG SELECTOR VALVE.  NO FURTHER DEFECTS.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.