NTSB Identification: LAX89LA236.
The docket is stored on NTSB microfiche number 40045.
Accident occurred Friday, July 07, 1989 in VENICE, CA
Probable Cause Approval Date: 08/02/1990
Aircraft: CESSNA 150M, registration: N704YY
Injuries: 2 Uninjured.

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 FLIGHT INSTRUCTOR AND THE STUDENT PILOT WERE PRACTICING TOUCH AND GO LANDINGS. JUST AFTER THE SECOND TAKEOFF, THE ENGINE POWER DROPPED TO IDLE. DESPITE EMERGENCY PROCEDURES, THE ENGINE POWER WOULD NOT INCREASE AND A FORCED LANDING WAS MADE IN A RESIDENTIAL AREA. DURING THE DESCENT, THE AIRPLANE IMPACTED WIRES AND A TRAFFIC LIGHT POLE. POST ACCIDENT INSPECTION REVEALED THE THROTTLE ARM HAD FALLEN OFF THE CARBURETOR SHAFT. THE UNIT ALSO HAD NOT BEEN SAFETIED IN PLACE.

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

THE IMPROPER INSTALLATION AND INSPECTION OF THE CARBURETOR THROTTLE LINKAGE ARM.

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