Crash of a Douglas C-47A-50-DL on the Mt Hamilton: 2 killed

Date & Time: Mar 8, 1948 at 1800 LT
Type of aircraft:
Registration:
NC64722
Flight Type:
Survivors:
No
Site:
Schedule:
Seattle – San Francisco
MSN:
10052
YOM:
1943
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
2
Captain / Total flying hours:
5552
Captain / Total hours on type:
3926.00
Copilot / Total flying hours:
3542
Copilot / Total hours on type:
1630
Aircraft flight hours:
3534
Circumstances:
The flight departed from Seattle, Washington, at approximately 1300, March 8, 1948, with a crew consisting of George S. Griebel, pilot, and William F. Grund, co-pilot. It carried 800 gallons of fuel, but no passengers or cargo, weighing at the time of take-off 21.963 pounds. At 1615, the flight reported over Red Bluff, California, at 12.000 feet, and requested clearance to descend to and cruise at 10.000 feet. Oakland Airway Traffic Control granted the request, and also cleared the flight to the Moffett radio range station. 25 miles southeast of San Francisco Municipal Airport, San Francisco, California. At 1715, the flight advised San Francisco Approach Control that it as holding northwest of the Moffett radio range station at 10,000 feet. In reply, San Francisco Approach Control directed the flight to hold between the Moffett radio range station and a point 2 minutes northwest of it. At the same time the flight was advised to expect clearance to the San Francisco Municipal Airport at 1745. Between 1717 and 1734 the flight, while flying its holding pattern, received clearance and descended from 10,000 to 6,000 feet. At 1741, it was cleared to make a “straight in” approach to the San Francisco Airport. It was directed to report when it crossed the Moffett radio range station and 4,000 feet, and to report again when it had descended below the overcast, A minute later, at 1742, the flight reported leaving the Moffett radio range station and 4,000 feet. Though the San Francisco Tower called repeatedly, this was the last communication received from the flight.
Between 1755 and 1805 a rancher in the vicinity of Mt. Hamilton heard a noise he thought to be either thunder or blasting. About 1945, after driving to another part of his ranch, he observed fire in the hills and realized then that the noise he had thought to be thunder was that of an aircraft crashing. It was midnight before a searching party reached the wreckage, which was approximately 20 miles east-southeast (on a bearing of 110 degrees) from the Moffett radio range station, and at an elevation of 1,800 feet.
Probable cause:
The Board determines that the probable cause of this accident was the flight’s deviation from its clearance and from approved instrument procedure.
Final Report:

Crash of a Douglas DC-6 in Gallup

Date & Time: Nov 11, 1947
Type of aircraft:
Operator:
Registration:
NC90741
Survivors:
Yes
Schedule:
San Francisco – Chicago
MSN:
43046
YOM:
1947
Crew on board:
5
Crew fatalities:
Pax on board:
20
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
9747
Captain / Total hours on type:
435.00
Copilot / Total flying hours:
3572
Copilot / Total hours on type:
417
Aircraft flight hours:
142
Circumstances:
Enroute from San Francisco to Chicago, the crew informed ATC that a fire erupted in the rear compartment of the aircraft and decided to divert to Gallup Airport for an emergency landing. The aircraft was difficult to maneuver and landed in flames. After it came to a halt, all 25 occupants were quickly disembarked and helped by local rescuers before the aircraft being totally destroyed by fire.
Probable cause:
The Board determines that the probable cause of these accidents was the combustion of gasoline which had entered the cabin heater combustion air intake scoop from the No 3 alternate tank vent due to inadvertent overflow during the transfer of fuel from the No 4 alternate tank.
The failure of the manufacturer and the Civil Aeronautics Administration to exercise full caution in the analysis of the fuel system of the DC-6 relative to proper location of fuel tank vents to provide non-hazardous location for fuel drainage, as required by existing regulations, and the insufficient attentiveness on the part of the manufacturer, the Civil Aeronautics Administration, and the air carriers to the procedures of fuel management employed by pilots operating DC-6 aircraft, were contributing factors.
This case was categorized as similar as the United Airlines' DC-6 that crashed in Bryce Canyon on October 24, 1947, killing all 52 occupants.
Final Report:

Crash of a Douglas DC-4 in Cheyenne: 2 killed

Date & Time: Oct 8, 1946 at 0433 LT
Type of aircraft:
Operator:
Registration:
NC30051
Survivors:
Yes
Schedule:
San Francisco – Cheyenne – Chicago
MSN:
10471
YOM:
1944
Flight number:
UA028
Crew on board:
4
Crew fatalities:
Pax on board:
43
Pax fatalities:
Other fatalities:
Total fatalities:
2
Captain / Total flying hours:
12573
Captain / Total hours on type:
2425.00
Copilot / Total flying hours:
3551
Copilot / Total hours on type:
831
Aircraft flight hours:
3077
Circumstances:
An approach from the west was then decided on by the Captain as visibility there had been fair. The First Officer contacted the tower and was cleared to land on Runway 12 (to the southeast). While headed west the Captain started a gradual left turn at the western boundary of the field, continued it for a short time and then entered a right turn in an attempt to line up with and land on Runway 12. This right turn was continued at an altitude of some 200 feet above the ground with, wheels down, 15 degree of flap and airspeed of approximately 120 mph (once as low as 110 mph). The Captain instructed the First Officer, who occupied the right hand pilot seat, (on the low and field side of the turn) to "sing out" when he saw the field. When the First Officer did see it he said "There's the field at 2 o'clock" (at a relative bearing of 60 degree). The Captain then leaned to the right to see the field himself and during this momentary diversion from the instruments enough altitude was lost to permit the right wing tip to strike the ground. The site was on rolling prairie approximately 20 feet higher than, and about 1 1/2 miles northwest of the Cheyenne Airport, on the U. S. Military Reservation of Fort Warren. At the instant of impact the aircraft was still in a right turn, banked approximately 15 degree and headed northeast. It came to rest about 700 feet beyond the point of first impact. A gasoline fire developed on the ground along the crash path and the right wing, which had been torn from the fuselage, was partly burned. Two passengers were killed while most of the other occupants were injured, some of them seriously.
Probable cause:
The Captain started a standard instrument approach to the Cheyenne Airport but did not follow through with the prescribed missed-approach procedure after descending below the minimum altitude. During the final attempt to land, the aircraft struck the ground with its right wing while in a right turn. The Board determines that the probable cause of this accident was a loss of altitude during a turn preparatory to a final approach while the pilot was maneuvering in an attempt to land.
Final Report:

Crash of a Boeing 314 Clipper into the Pacific Ocean

Date & Time: Nov 4, 1945
Type of aircraft:
Operator:
Registration:
NC18601
Flight Phase:
Survivors:
Yes
Schedule:
Honolulu – San Francisco
MSN:
1988
YOM:
1939
Country:
Region:
Crew on board:
10
Crew fatalities:
Pax on board:
13
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Enroute, two engines lost power and the captain decided to make an emergency landing about 625 miles northeast of Honolulu. All 23 occupants were quickly rescued by the crew of a US Navy ship while the aircraft christened 'Honolulu Clipper' was deliberately sunk by gunfire.
Probable cause:
Double engine failure.

Crash of a Consolidated PBY-5A Catalina in San Francisco: 7 killed

Date & Time: May 4, 1945
Type of aircraft:
Operator:
Registration:
48416
Flight Phase:
Survivors:
Yes
Site:
Schedule:
San Francisco - San Francisco
MSN:
1778
Crew on board:
9
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
7
Circumstances:
Shortly after takeoff from San Francisco, while climbing, the seaplane hit a mountain slope and crashed. Two crew members were seriously injured while seven others were killed.

Crash of a Consolidated PBY-5A Catalina in Brookings: 9 killed

Date & Time: Jan 31, 1945
Type of aircraft:
Operator:
Registration:
46611
Flight Phase:
Flight Type:
Survivors:
No
Site:
Schedule:
San Francisco – Seattle
Crew on board:
9
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
9
Circumstances:
Enroute, the seaplane hit the slope of a mountain near Brookings, killing all nine crew members.

Crash of a Douglas DC-3-209 in Burbank: 8 killed

Date & Time: Dec 1, 1944 at 0258 LT
Type of aircraft:
Operator:
Registration:
NC17322
Survivors:
Yes
Schedule:
San Francisco – Burbank – New York
MSN:
1968
YOM:
1937
Flight number:
TW018
Crew on board:
3
Crew fatalities:
Pax on board:
20
Pax fatalities:
Other fatalities:
Total fatalities:
8
Captain / Total flying hours:
5400
Captain / Total hours on type:
4315.00
Copilot / Total flying hours:
1084
Copilot / Total hours on type:
136
Aircraft flight hours:
22180
Circumstances:
The flight was cleared to Burbank Airport for a standard instrument approach. During the approach the plane descended under instrument conditions to such a low altitude as to clip the tree tops and strike a power line pole and then crash at a point approximately 6 1/2 miles short of the Burbank Airport. In a normal approach the plane would have flown over this point at an altitude of about 1650 feet above the ground. The specific reasons for the plane's descent below the minimums for instrument approach were not determinable, nor was it possible to tell whether the deviation was a voluntary one. Investigation did reveal, however, that a number of divisions were made from the company's standard Civil Aeronautics Administration approved procedures during this flight. Both pilots and six passengers were killed.
Crew:
John Pollard Snowden, pilot, †
Thomas Leo Bamberger, copilot, †
Donna Elizabeth Marr, hostess.
Probable cause:
On the basis of the evidence available the Board finds that the probable cause of this accident was the pilot's deviation from the standard instrument approach procedure then he descended below the established safe minimum altitude. A contributing factor was the company's failure to enforce adherence to company procedures.
Final Report:

Crash of a Douglas DC-3-454 in Hanford: 24 killed

Date & Time: Nov 4, 1944 at 1730 LT
Type of aircraft:
Operator:
Registration:
NC28310
Flight Phase:
Survivors:
No
Schedule:
San Francisco – Burbank - New York
MSN:
4992
YOM:
1942
Flight number:
TW008
Crew on board:
3
Crew fatalities:
Pax on board:
21
Pax fatalities:
Other fatalities:
Total fatalities:
24
Aircraft flight hours:
13167
Circumstances:
Flight 8 took off at 1600 and proceeded according to plan to a cruising altitude of 10,000 feet for Burbank on an instrument clearance. It reported over Fresno on schedule cruising at 10,000 feet and estimated Bakersfield at 1735. At 1712 the crew was last contacted by the company and given a routine message which was acknowledged. Thereafter, at intervals of a few minutes, numerous unsuccessful attempts were made to contact the flight. At no time did the captain report any difficulty with the airplane or comment on the weather. While cruising in poor weather conditions (thunderstorm and severe turbulence), the aircraft went out of control, got inverted and dove into the ground prior to crash in a field. All 24 occupants were killed.
Probable cause:
On the basis of all the evidence available the Board determines that the probable cause of this accident was the failure of the airplane's structure as a result of severe turbulence, in important contributing cause was the fact that the airplane was undoubtedly in an abnormal attitude of flight, i.e., inverted, at the instant of structural failure. The cause of the airplane becoming inverted has not been determined.
Final Report:

Crash of a Douglas R5D-2 off San Francisco: 1 killed

Date & Time: Sep 4, 1944 at 1200 LT
Type of aircraft:
Operator:
Registration:
90385
Flight Phase:
Flight Type:
Survivors:
Yes
Schedule:
San Francisco - San Francisco
MSN:
18358
YOM:
1944
Crew on board:
5
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Circumstances:
While performing a training exercise, the four engine aircraft went out of control and crashed into the San Francisco Bay. A crew member was killed while all four other occupants were rescued.

Crash of a Consolidated PBY-5 Catalina into the San Francisco Bay: 3 killed

Date & Time: Feb 14, 1943
Type of aircraft:
Operator:
Registration:
08158
Flight Type:
Survivors:
Yes
Crew on board:
6
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
3
Circumstances:
While landing in the San Francisco Bay, the seaplane hit a submerged object and sunk. Three crew members were killed while three others were injured.