# SDR U2RA201302140001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 14, 2013
- Submitted: March 14, 2013
- Operation: Air carrier
- Aircraft: [N952CA](https://openairdocs.org/aircraft/N952CA), registered now
- Make and model: Boeing 747428
- Aircraft serial: 25238
- Aircraft time: 83,570 hours, 11,715 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Bolt
- Condition: Backed Out
- Location: Sequence Valve
- Stage of operation: AP
- How discovered: O
- Nature of condition: S
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/U2RA201302140001

## Discrepancy

GEAR DISAGREE AND GEAR DOOR EICAS RT BODY GEAR UNSAFE INDICATION ON LANDING.  ALTERNATE GEAR EXTENSION METHOD PERFORMED AND ALL LIGHTS GREEEN.  FOUND MLG DOOR SEQUENCE VALVE CARRIER BOLT FALLEN OUT.  NUT MISSING.  REPLACED HARDWARE WITH NEW LOCKING NUT.

---
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.