# SDR CA140919007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2014
- Submitted: March 12, 2015
- Operation: General aviation
- Make and model: Airbus A310-304
- Registry model: [Airbus A310-304](https://openairdocs.org/model/airbus-industrie-a310-304) (OpenAirDocs)
- Aircraft time: 83,688 hours
- Engine: Ge CF680C2A2
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- Condition: Damaged
- Part time: 2,741 hours
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA140919007

## Discrepancy

(CAN) DURING ROUTINE VISIT IN AVIONIC SHOP FOR REGULAR BATTERY CHECK, THE CASE OF EPSU BATTERY WAS FOUND WITH A SMALL BURN. THE ASSY WAS OPENED AND CELLS NR 4 AND 5 WERE FOUND SHORT CIRCUITED AT THE TOP WHERE THE CONNECTING TAB IS POSITIONED. FOLLOWING TWO REASONS ARE VERY PROBABLE: 1. EITHER MISPLACEMENT OF THE BATTERY INNER RUBBER SPACING INSULATOR 2. OR ONE OF THE TWO BATTERY CELLS OVERHEATED. THIS MIGHT HAVE CAUSED THE THERMOPLASTIC OF THE CELLS NR 4 AND 5 TO CRACK, CAUSING A SHORTCIRCUIT BETWEEN THE TWO CELLS. BATTERY HAS BEEN SCRAPED.

---
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.