1 fatality

Loss of Control After Left Throttle Linkage Loose During Initial Climb (N3742C)

Chicago-Midway, United States of AmericaTakeoff (climb)

On July 20, 1987, a Cessna 402 (registration N3742C) operated by Air Maryland was involved in an aviation accident near Chicago-Midway, United States of America during takeoff. One person was killed. Investigators recorded the probable cause as: The NTSB determines the probable cause(s) of this accident to be: Failure of maintenance personnel to perform proper installation of the left throttle linkage. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A).

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-06-11Data APIEditorial standards
Aircraft registered N3742C
Aircraft registered N3742C. Photo: redlegsfan21 from Vandalia, OH, United States / CC BY-SA 2.0, via Wikimedia Commons

During initial climb, the pilot reported losing an engine, then lost control and descended into a residential area. Investigation found a loose left throttle linkage due to improper maintenance installation. The pilot was killed.

Accident

During the initial climb after takeoff, the pilot reported 'just lost one' via radio. Subsequently, the aircraft lost control and descended into a residential area. The pilot, who was the sole occupant, was killed in the accident.

Investigation

Investigation revealed that the left engine throttle linkage had a loose connection between the serrated washer and the serrated shaft. The engine had been removed and reinstalled several flight hours prior to the accident. Further examination showed that the induction air control linkage was loose. Additionally, the pilot had not performed propeller feathering and had disregarded the minimum control airspeed (Vmc). The accident occurred during dark night conditions. During the uncontrolled descent, the aircraft collided with a static wire and a nonresidential building.

Probable Cause

The National Transportation Safety Board determined that the probable cause of the accident was the failure of maintenance personnel to perform proper installation of the left throttle linkage. Contributing findings included the loose induction air control linkage, the pilot's failure to feather the propeller, and the pilot's disregard of Vmc, combined with the dark night light conditions.