# SDR 2006UALA00691

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2006
- Submitted: April 18, 2006
- Operation: Air carrier
- Aircraft: [N913UA](https://openairdocs.org/aircraft/N913UA), registered now
- Make and model: Boeing 737522
- Aircraft serial: 25291
- Aircraft time: 39,851 hours, 29,405 cycles
- Engine: Cfmint CFM563C1
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Switch
- Condition: Failed
- Location: Mlg
- Stage of operation: CL
- How discovered: O
- Nature of condition: G, S
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2006UALA00691

## Discrepancy

CREW REPORTS AFTER TAKEOFF, AUTO-THROTTLE WENT INOP, L-NAV FAILED, BOTH TRANSPONDERS FAILED, AND AFTER FURTHER CLIMBING, CABIN ALT HORN SOUNDED.  EMERGENCY DECLARED & FLIGHT DIVERTED.  LANDING GEAR SWITCH FAILED. REPLACED LANDING GEAR SWITCH S105.

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