NTSB Identification: LAX87FA290B.
The docket is stored on NTSB microfiche number 37667.
Accident occurred Tuesday, August 04, 1987 in PALMDALE, CA
Probable Cause Approval Date: 06/07/1989
Aircraft: CESSNA 172N, registration: N737EV
Injuries: 11 Uninjured.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

A DEHAVILLAND DHC-6, N931MA, OPERATING AS TRANSWORLD EXPRESS FLT 7591 (TWE 7591) & A CESSNA 172N, N737EV, COLLIDED ABT 10 MILES WEST/SOUTHWEST OF PALMDALE, CA AT ABT 5500 FT MSL. TWE 7591 WAS DESCENDING ON A 355 DEG MAG HEADING; N737EV WAS LEVEL AND WAS MAINTAINING A 060 DEG MAG HEADING. THE CAPT ABOARD TWE 7591 WAS FLYING THE AIRPLANE & THE FIRST OFFICER OBSVD N737EV JUST PRIOR TO IMPACT AND TOOK THE CONTROLS AND EXECUTED AN ABRUPT RIGHT TURN; THE CAPT THEN CONTINUED THE DESCENDING RIGHT TURN BUT TO NO AVAIL - THE AIRPLANE'S LEFT WING COLLIDED WITH N737EV. THE PLT OF N737EV REPORTED THAT HE DID NOT SEE TWE 7591 UNTIL THE COLLISION. THE CONVERGENCE ANGLE OF 7591 WAS 53 DEG AND 62 DEG FOR 737EV. BOTH AIRPLANES LANDED SAFELY - TWE 7591 LANDED AT WILLIAM J. FOX ARPT, LANCASTER, CA. & N737EV LANDED AT PALMDALE ARPT.

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

VISUAL LOOKOUT..INADEQUATE..PILOT IN COMMAND

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

VISUAL LOOKOUT..INADEQUATE..PILOT OF OTHER AIRCRAFT

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