NTSB Identification: ATL91LA062.
The docket is stored on NTSB microfiche number 44372.
Accident occurred Friday, March 01, 1991 in SUCHES, GA
Probable Cause Approval Date: 03/31/1993
Aircraft: PIPER PA-23-250, registration: N6546Y
Injuries: 1 Serious.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PRIVATE PILOT WAS IN IMC AT 7,000 FEET MSL AND ABOUT 30 MINUTES INTO HIS FLIGHT WHEN HE REPORTED A COMPLETE ELECTRICAL FAILURE. HE BEGAN TO ACCOMPLISH LOST COMM PROCEDURES AND ATTEMPTED TO MAINTAIN HIS LAST ASSIGNED HEADING, AIRSPEED, AND ALTITUDE. HE REPORTED NO PROBLEMS WITH HIS ENGINES, PITOT STATIC SYSTEM OR VACUUM POWERED FLIGHT INSTRUMENTS. HE REMEMBERED THE AIRPLANE STRIKING TREE LIMBS, BUT COULD REMEMBER NOTHING AFTER THAT UNTIL THE AIRPLANE HAD CRASHED ONTO THE TERRAIN. THE ELEVATION AT THE CRASH SITE WAS ABOUT 3,100 FEET MSL. THE PILOT COULD NOT EXPLAIN WHY HE LOST 3,900 FEET OF ALTITUDE PRIOR TO THE CRASH. HE DID NOT REPORT A LIGHTNING STRIKE, AND HE WAS IN IMC UNTIL IMPACT. THE REASON FOR THE LOSS OFF ELECTRICAL POWER WAS NOT DETERMINED.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

THE PILOT'S FAILURE TO MAINTAIN ALTITUDE DURING CRUISE FLIGHT AFTER LOSS OF ELECTRICAL POWER FOR AN UNDETERMINED REASON.

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