# SDR U8DA011105

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 11, 2005
- Submitted: June 23, 2005
- Operation: Air carrier
- Aircraft: N415ST
- Make and model: Cessna 414A
- Registry model: [Cessna 414A](https://openairdocs.org/model/cessna-414a) (OpenAirDocs)
- Aircraft serial: 414A0467
- Aircraft time: 7,688 hours
- Engine: Cont TSIO520*
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Shuttle Valve
- Part number: AN62776
- Condition: Stuck
- Location: Mlg Bottle
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/U8DA011105

## Discrepancy

NOSE LANDING GEAR DID NOT SHOW DOWN AND LOCKED.  GEAR LAMP WOULD INTERMITTENTLY LIGHT AND HYDRAULIC PRESSURE LIT WOULD INTERMITTNETLY ILLUMINATE.  DISASSEMBLY AND T/S SHOWED SHUTTLE VALVE STUCK.  CLEANED, REASSEMBLED AND TESTED.  N2 BOTTLE REMOVE, CLEANED, INSPECTED AND REFILLED, LEAK CHECKED, REINSTALLED.  MONITOR FOR PRESSURE DROP, NONE NOTED.  ACTIVATED EMERGENCY NITROGEN BLOW-DOWN BOTTLE.  GEAR DOWN AND LOCKED WITH BOTTLE PRESSURE.  SUSPECT POSSIBLE N2 BOTTLE LEAK, DIRTY SHULLTE VALVE, HOWER, PREFLIGHT INSPECTION OF PRESSURE BOTTLE WAS WITHIN LIMITS.  (K)

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