# SDR UIEA2026100200939

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 2, 2026
- Submitted: October 5, 2026
- Operation: Air carrier
- Aircraft: [N406KZ](https://openairdocs.org/aircraft/N406KZ), registered now
- Make and model: Boeing 747-4KZF
- Registry model: [Boeing 747-4KZF](https://openairdocs.org/model/boeing-747-4kzf) (OpenAirDocs)
- Aircraft serial: 36133
- Aircraft time: 66,391 hours, 11,940 cycles
- System (JASC): [3297 · Landing Gear System Wiring](https://openairdocs.org/jasc/3297)
- Part: Electronic Unit
- Part number: 856920
- Part serial: 5697
- Condition: Faulted
- Location: Zone 200
- Stage of operation: CL
- 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/UIEA2026100200939

## Discrepancy

GEAR LEVER WOULDN'T COME UP AFTER DEPARTURE(<P>REMOVED AND REPLACED PROX SWITCH ELECTRONICS UNIT PER AMM 32-09-03/501. PERFORMED GROUND TEST OF PSEU SYSTEM PER AMM 32-61-00. TEST PASSED, NO FURTHER FAULTS AT THIS TIME. </P>)

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