# SDR UALA2011093005308

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 29, 2011
- Submitted: October 25, 2011
- Operation: Air carrier
- Aircraft: [N229UA](https://openairdocs.org/aircraft/N229UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30557
- Aircraft time: 40,789 hours, 4,995 cycles
- Engine: Pwa PW40903
- System (JASC): [2921 · Hydraulic Accumulator, Auxiliary](https://openairdocs.org/jasc/2921)
- Part: Diode
- Condition: Malfunctioned
- Location: Rat
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011093005308

## Discrepancy

RAT INADVERTENTLY DEPLOYED, WHILE RESETTING CB'S IN ELMS P310 PSU-A&B PRIM (B4-C7) AND ELMS P310 PSU-A&B ALTN (J5-K5).  RAT RETRACTED PER AMM.  ITEM WORK WITH EG6198 FOR OPERATIONAL TEST.  REPLACED TB405 POS 12 DIODE ACCOMPLISHED FIM TASK 24-09-TASK 819 AND RAT DID NOT DEPLOY.

---
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.