# SDR UIEA2026021300049

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 13, 2026
- Submitted: February 16, 2026
- Operation: Air carrier
- Aircraft: [N439GT](https://openairdocs.org/aircraft/N439GT), registered now
- Make and model: Boeing 747409F
- Aircraft serial: 30767
- Aircraft time: 99,327 hours, 18,079 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Sequence Valve
- Part number: 608002201
- Part serial: 2106
- Condition: Faulted
- Location: Nlg
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2026021300049

## Discrepancy

GEAR WOULD NOT STAY UP WITH THE LANDING GEAR HANDLE IN THE UP POSITION MOVED HANDLE TO THE OFF POSITION WHILE INDICATING UP AND THE GEAR REMAINED UP INSTEAD OF DROPPING.  R & R NOSE GEAR SEQUENCE VALVE IAW AMM 32-34-07-004-001, 32-34-07-404-006 & IPC 32-34-07-02. LEAK AND OPS CHK GOOD. GEAR SWING IAW AMM 32-34-00-715-036, 32-33-00-715-071 & 32-32-00-355-046, NO DEFECTS NOTED.

---
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.