60 Years ago today: On 29 March 1959 an Indian Airlines DC-3 crashed following a structural failure when flying through a thunderstorm; killing all 24 occupants.

Date:Sunday 29 March 1959
Time:ca 10:45
Type: Douglas C-47A-90-DL (DC-3)
Operator:Indian Airlines
Registration:VT-CGI
C/n / msn:20176
First flight:1944
Engines:Pratt & Whitney R-1830-92
Crew:Fatalities: 4 / Occupants: 4
Passengers:Fatalities: 20 / Occupants: 20
Total:Fatalities: 24 / Occupants: 24
Aircraft damage:Damaged beyond repair
Location:56 km (35 mls) W of Silchar (   India)
Phase:En route (ENR)
Nature:Domestic Scheduled Passenger
Departure airport:Agartala-Singerbhil Airport (IXA/VEAT), India
Destination airport:Silchar-Kumbhirgram Airport (IXS/VEKU), India

Narrative:
The DC-3 was operating on a flight from Calcutta (CCU) to Imphal (IMF) via Agartala (IXA) and Silchar (IXS). The aircraft took off from Agartala at 10:10 for a 50-minute flight to Silchar. En route weather was poor (thunderstorms in the area southwest of Silchar). The aircraft didn’t arrive at its destination and was found to have crashed

Probable Cause:

PROBABLE CAUSE: “Structural failure occurred while the aircraft was flying through a thunderstorm. The failure originated in the port centre section and was due to loads which exceeded the ultimate design value for the structure. It was not possible to establish whether the pilot adopted the correct procedure for flying in turbulence.”