# SDR UIEA2020070201473

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 30, 2020
- Submitted: July 2, 2020
- Operation: Air carrier
- Aircraft: [N718BA](https://openairdocs.org/aircraft/N718BA), registered now
- Make and model: Boeing 747-4H6
- Registry model: [Boeing 747-4H6](https://openairdocs.org/model/boeing-747-4h6) (OpenAirDocs)
- Aircraft serial: 27042
- Aircraft time: 79,690 hours, 11,160 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Switch
- Part number: 21EN2666
- Condition: Failed
- Location: Rt Wlg
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2020070201473

## Discrepancy

FOUND SWITCH S1340 FUNCTION FAIL AT RT WLG.  IAW AMM 32-36-02-004-001 / 32-36-02-A04-005 REV 98 AND WDM 32-35-12 REV 22 REPLACED SWITCH S1240.  IAW AMM 32-36-02-705-001 REV 98 PERFORMED TEST OF UPLOCK MECHANISM FOR ALTERNATE EXTENSION OF THE RIGHT WING GEAR, RESULT WAS SATISFACTORY.

---
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.