Mar 16, 1990
Accident
Substantial ANDERSON, SC
Injuries2 serious, 2 minor
Phase of Flight-
ConditionsVMC
OperationFAR 135
Probable Cause
ELECTRICAL ARCING WHICH RESULTED FROM A SHORT IN THE PILOT'S MAP LIGHT CIRCUIT; A CHAFTED WIRE CONTACTED THE OXYGEN SUPPLY LINE AT THE OXYGEN CONTROL PANEL IN THE COCKPIT. A FACTOR IN THE ACCIDENT WAS THE INADEQUATE DESIGN OF THE OXYGEN PANEL PLUMBING AND ELECTRICAL WIRING FOR THE PILOT'S MAP LIGHT WHICH ALLOWED CONTACT BETWEEN THE TWO SYSTEMS.
NTSB ATL90LA080