# SDR 98ZZZX1084

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N120VT](https://openairdocs.org/aircraft/N120VT), registered now
- Make and model: Amtr MINI500
- Aircraft serial: 0222
- System (JASC): [2571 · Battery Box Structure](https://openairdocs.org/jasc/2571)
- Part: Battery Box
- Condition: Not Grounded
- Location: Firewall
- Stage of operation: IN
- Nature of condition: A
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX1084

## Discrepancy

HELICOPTER HAS BATTERY BOX BOLTED TO COMPOSITE FIREWALL.  BATTERY BOX IS NOT GROUNDED TO BATTERY.  A REGULATOR RECTIFIER AND STARTER RELAY ARE GROUNDED TO BATTERY BOX.  A SCREWDRIVER WAS ACCIDENTLY DROPPED INSIDE OF BATTERY BOX TOUCHING POSITIVE TERMINAL.  SCREWDRIVER THEN GAVE BOX A POSITIVE CHARGE COMPLETING CIRCUIT THROUGH THE NEGATIVE WIRE OF THE REGULATOR RECTIFIER AND THIS CAUSED A DEAD SHORT AND WIRES TO CATCH FIRE.

---
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.