On January 28, 1981, a Beechcraft H18 (registration N787Q) operated by Western States Express was involved in an aviation accident near Newhall, United States of America in flight. 2 people were killed. Investigators recorded the probable cause as: Engine failure during normal cruise due to improper operation of powerplant and powerplant controls. Contributing factors: improper operation of or failure to use anti-icing/de-icing equipment, carburetor ice, rain, conditions conducive to carburetor or… This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 1 related events involving the same aircraft type or operator are linked below.
Both engines lost power in severe icing during cruise; emergency landing attempt ended in crash in isolated area near Newhall. Two occupants died. Investigation cited improper engine operation and anti-icing equipment misuse.
Accident Overview
During normal cruise flight, the pilot reported severe icing conditions. Subsequently, both engines lost power. The pilot attempted an emergency landing, but the airplane crashed in an isolated area near Newhall. Both occupants were killed.
Investigation Findings
The official investigation determined that the probable cause of the accident was engine failure during normal cruise due to improper operation of powerplant and powerplant controls. The following contributing factors were reported:
Improper operation of or failure to use anti-icing/de-icing equipment
Carburetor ice
Rain
Conditions conducive to carburetor or induction system icing
Physical impairment of the pilot
Alcoholic impairment of efficiency and judgment
Partial loss of power on both engines
Forced landing off airport on land
No additional information was provided about the aircraft type, registration, date, operator, or other specifics.