63 Years ago today: On 12 January 1955 a TWA Martin 2-0-2 collided in midair with a corporate DC-3; both aircraft crashed near Cincinnati, KY, USA, killing all 15 occupants.

Date:Wednesday 12 January 1955
Time:09:04
Type:Martin 2-0-2A
Operator:Trans World Airlines – TWA
Registration:N93211
C/n / msn:14081
First flight:1950
Total airframe hrs:7958
Engines:Pratt & Whitney R-2800-CB16
Crew:Fatalities: 3 / Occupants: 3
Passengers:Fatalities: 10 / Occupants: 10
Total:Fatalities: 13 / Occupants: 13
Collision casualties:Fatalities: 2
Airplane damage:Damaged beyond repair
Location:4 km (2.5 mls) W of Cincinnati/Northern Kentucky Airport, KY (CVG) (   United States of America)
Phase:En route (ENR)
Nature:Domestic Scheduled Passenger
Departure airport:Cincinnati/Northern Kentucky Airport, KY (CVG/KCVG), United States of America
Destination airport:Cleveland-Hopkins International Airport, OH (CLE/KCLE), United States of America
Flightnumber:TW694

Narrative:
DC-3 N999B departed Battle Creek (BTL) at 07:33 for a VFR flight to Lexington, KY (LEX). At 09:02 a TWA Martin 2-0-2 departed Cincinnati Airport (CVG) runway 22. While making a right turn after takeoff, the Martin collided with the DC-3 at or near the cloud base at an altitude of 700-900 feet.
The left wing of the DC-3 came in contact with the right propeller of the Martin. The right wing of the Martin and the left wing of the DC-3 then struck, resulting in disintegration of the DC-3 wing and causing such structural damage to the Martin right wing that it also separated from the aircraft. The left propeller of the Martin cut across the top of the DC-3 fuselage and through the vertical fin and rudder. Portions of the DC-3 fin and rudder separated in flight.
Both aircraft crashed out of control.

Probable Cause:

PROBABLE CAUSE: “Operation of the DC-3 in the control zone as unknown traffic, without clearance, very close to the base of, or in, the overcast.”