ASN Aircraft accident Lockheed L-049 Constellation N86504 Lake Tahoe Airport, CA (TVL)
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Status:Accident investigation report completed and information captured
Date:Sunday 1 March 1964
Type:Silhouette image of generic CONI model; specific model in this crash may look slightly different
Lockheed L-049 Constellation
Operator:Paradise Airlines
Registration: N86504
MSN: 2025
First flight: 1945
Total airframe hrs:45629
Engines: 4 Wright R-3350
Crew:Fatalities: 4 / Occupants: 4
Passengers:Fatalities: 81 / Occupants: 81
Total:Fatalities: 85 / Occupants: 85
Aircraft damage: Destroyed
Aircraft fate: Written off (damaged beyond repair)
Location:17 km (10.6 mls) NE of Lake Tahoe Airport, CA (TVL) (   United States of America)
Crash site elevation: 2644 m (8675 feet) amsl
Phase: En route (ENR)
Nature:Domestic Non Scheduled Passenger
Departure airport:San Jose Municipal Airport, CA (SJC/KSJC), United States of America
Destination airport:Lake Tahoe Airport, CA (TVL/KTVL), United States of America
Flightnumber: 901A
The Paradise Airlines Lockheed Constellation operated Flight 901A from Oakland (OAK) to Tahoe-Valley Airport (TVL) via Salinas (SNS) and San Jose (SJC).
The aircraft departed Oakland at 08:43 and was ferried to Salinas, arriving at 09:11. The flight departed at 09:27 with 18 passengers and arrived at San Jose at 09:46. The Constellation departed was airborne again at 10:40 on a VFR flight plan. After becoming airborne, the crew requested and received an IFR clearance via airways Victor 6 South to Sacramento, Victor 6 to the Lake Tahoe VOR, to maintain 11,000 feet. The company prepared flight plan then called for a VFR flight to the Tahoe Valley Airport because there was no approved IFR approach procedure for the destination.
At 10:57 Flight 901A was in radio communication with Paradise Flight 802 which was outbound from the Tahoe Valley Airport. The captain of Flight 802 advised the crew of Flight 901 that he had encountered "...icing at 12,000 (feet) ... there were snow showers over the lake and clouds topping mountains in the vicinity ...".
Flight 901A then climbed to a cruising altitude of 15000 feet. The crew of Flight 901A contacted the Paradise Airlines passenger agent at the Tahoe Valley Airport at 11:27. At this time he gave them the 11:00 Tahoe Valley weather which was: Estimated ceiling 2,000 feet overcast; 3 miles visibility; snow showers; temperature 32°; dewpoint 32°; wind from 210°; 10 knots, gusts to 15 knots; altimeter 29.97. He also asked the crew to call the company if they decided to land at Reno, Nevada rather than Tahoe Valley. The crew acknowledged this transmission with "will do."
The crew apparently decided to abandon the approach. They took up a heading which took them towards the high terrain east of the lake. It is very likely that from their position over the Tahoe VOR they were able to observe the VFR conditions that existed east of Lake Tahoe on the leeward side of the mountains.
Additionally, investigators assumed that the first officer was aware of the existence of Daggett Pass and considered it an access to VFR conditions beyond the pass. An altitude of 9,000 feet would provide about 1,500 feet terrain clearance through the center of the pass.
Then, either because they believed they had sufficient altitude to clear the terrain or because they were unable to climb higher due to structural ice, the aircraft leveled off. At that time the aircraft struck several trees on the west slope of a ridge of Genoa Peak at approximately 8,675 ft, slightly right-wing-low in a nearly level flight attitude. The airplane broke up, killing all aboard.

Probable Cause:

PROBABLE CAUSE: "The pilot's deviation from prescribed VFR flight procedures in attempting a visual landing approach in adverse weather conditions. This resulted in an abandoned approach and geographical disorientation while flying below the minimum altitude prescribed for operations in mountainous areas."

Accident investigation:

Investigating agency: CAB
Status: Investigation completed
Duration: 1 year and 5 months
Accident number: File No. 1-0002
Download report: Final report

VFR flight in IMC
Controlled Flight Into Terrain (CFIT) - Mountain

» ICAO Aircraft Accident Digest No.16, Circular 82-AN/69 (77-84)


photo of Lockheed-L-049-Constellation-N86504
accident date: 01-03-1964
type: Lockheed L-049 Constellation
registration: N86504

This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from San Jose Municipal Airport, CA to Lake Tahoe Airport, CA as the crow flies is 238 km (149 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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Lockheed L-049

  • 88 built
  • 26th loss
  • 17th fatal accident
  • The worst accident
» safety profile

 United States of America
  • 4th worst accident (at the time)
  • 23rd worst accident (currently)
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