On May 16, 1991, a Beech A36 (registration N6724T) operated by John L. Ronacher was involved in an aviation accident near Rawlins, WY. Investigators recorded the probable cause as: THE PILOT'S LACK OF FAMILIARITY WITH THE AIRCRAFT, HIS LACK OF UNDERSTANDING OF THE ELECTRICAL SYSTEM, AND A PREMATURE PRECAUTIONARY LANDING. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
Pilot of Beech A36 experienced dropping engine gauge readings, attributed to alternator failure. After unsuccessful standby generator attempt, he dead-reckoned to Rawlins, Wyoming, and landed short of the runway due to perceived inadequate engine power.
Flight and System Failure
The pilot of a Beech A36 was flying above an overcast cloud layer when he observed that the readings on the engine gauges were declining. He concluded that the alternator had malfunctioned. His subsequent attempt to engage the standby generator was unsuccessful.
Navigation and Approach
After the electrical system failure, the pilot navigated by dead reckoning to Rawlins, Wyoming. He initiated a let-down through the clouds to approach the airport. During the descent, he believed that the engine was not producing sufficient power.
Landing
The pilot continued the approach but landed short of the runway. The landing occurred after he determined that the engine was not delivering adequate power for a normal touchdown on the runway surface.