Casualties unknown

Dual-Engine Power Loss During Cruise Leads to Off-Airport Landing (N16502)

Laconia, NH, US

On December 7, 1988, a Piper PA-34-200 (registration N16502) operated by Herbert Hauser was involved in an aviation accident near Laconia, NH. Investigators recorded the probable cause as: AIRCRAFT STRIKING THE ROAD SIGN AFTER THE AIRCRAFT EXPERIENCED A DOUBLE POWER LOSS DUE TO MISMANAGEMENT OF THE FUEL SYSTEM BY THE PILOT. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-09-03Data APIEditorial standards
Aircraft registered N16502
Aircraft registered N16502. Photo: Aero Icarus from Zürich, Switzerland / CC BY-SA 2.0, via Wikimedia Commons

A pilot took off with a low battery and uneven fuel quantities. After losing the left engine at 7,500 feet, the right engine also failed. The aircraft landed on a roadway; post-crash checks found fuel only in the right tank.

Incident Overview and Initial Conditions The pilot initiated a takeoff while aware of a low battery condition. Fuel quantities at departure were 15 gallons in the left tank and 30 gallons in the right tank. ## In-Flight Power Loss and Pilot Actions While cruising at 7,500 feet, the pilot experienced a loss of power on the left engine. Emergency procedures were performed, but a restart was not achieved. The pilot feathered the left propeller and set up crossfeed. The right engine failed a few seconds later. The pilot was again unable to restart it and feathered its propeller. At that point, both fuel selectors were on crossfeed. The selectors were reset to tank-to-engine, and the pilot attempted to restart the right engine but was unable to do so because of the low battery. ## Landing and Post-Crash Findings An off-airport landing was made on a roadway. Post-crash examination showed fuel in the right tank and no fuel in the left tank. ## Pilot Qualification History The pilot had failed a multi-engine checkride two and a half months before the accident and did not pass the checkride until two months after the accident.

Frequently asked questions

What happened in the 7 Dec 1988 Piper PA-34-200 accident near Laconia, NH?

A pilot took off with a low battery and uneven fuel quantities. After losing the left engine at 7,500 feet, the right engine also failed. The aircraft landed on a roadway; post-crash checks found fuel only in the right tank.

What aircraft was involved and where did it happen?

The accident on 7 Dec 1988 involved a Piper PA-34-200, registration N16502, operated by Herbert Hauser, at Laconia, NH.

What was the probable cause of the accident?

AIRCRAFT STRIKING THE ROAD SIGN AFTER THE AIRCRAFT EXPERIENCED A DOUBLE POWER LOSS DUE TO MISMANAGEMENT OF THE FUEL SYSTEM BY THE PILOT.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X27492. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.