Denver

While cruising at an altitude of 9,000 feet on a flight from Edmonton to Denver, the crew encountered technical problems with the left engine. A propeller blade detached and hit the fuselage. Shortly later, the engine suffered severe vibrations and later detached from its mount. In such conditions, the crew decided to reduce his altitude and attempted an emergency landing. The aircraft crash landed in a field located 12 miles east of Billings, hit a ditch and came to rest in flames. Eight occupants were killed while eight others were injured.

Few minutes after takeoff from Denver, bound for Kansas City, the twin engine aircraft hit the slope of a mountain located 8 miles northwest of Golden. The aircraft was destroyed and all 11 occupants were killed. For unknown reason, the crew was flying to the west straight on to the Rocky Mountains instead to the east to Kansas City.

The crew was performing a liaison flight when an engine failed en route. The captain decided to divert to Lowry AFB in Denver for a safe landing. Unfortunately, on final approach, the heavy bomber stalled and smashed in flames in a residential area located few hundred yards short of runway threshold. The aircraft disintegrated on impact and was destroyed by a post crash fire. Five houses were damaged and four others were destroyed. On ground, six people were injured as well as six crew members. Eight others were killed in the crash.
Crew:
Cpt James W. Shanks, pilot,
1st Lt Robert H. Snure, copilot,
T/Sgt Robert F. Jarvis, gunnery instructor, †
T/Sgt Herbert Oeser, gunnery instructor, †
Cpl Richard P. Yukob, gunnery instructor, †
Pfc James E. Snyder, gunnery instructor, †
Pfc Ronald W. Wiersma, gunnery, †
Pfc William J. Ablondi, gunnery, †
Pfc Baxter Srber, gunnery, †
Pfc John R. Servic, gunnery. †
S/Sgt William A. Zippel,
Cpl Ray E. Widner,
Pfc Teddy D. Allen,
Pfc Joe D. Wiggins.

Flight 610 of June 29, 1951, originated in San Francisco, California, and was scheduled to Chicago, Illinois, with en route stops, among which were Oakland, California, Salt Lake City, Utah, and Denver, Colorado. The crew consisted of Captain J R Appleby, First Officer H G Tower, Flight Engineer A T Petrovitch, and Stewardesses C J Baymond and F M Smith. The flight departed San Francisco on schedule at 1915 and after stopping at Oakland proceeded to Salt Lake City, arriving there at 2324. It departed Salt Lake City at 0011, June 30, 1951, 26 minutes behind schedule due to the reloading of bulky cargo At the time of departure the aircraft weighed 78,597 pounds, which was within the certificated gross take-off weight of 79,380 pounds, the load was properly distributed with respect to the center of gravity. There were five crew members, forty-four adult passengers and one infant on board. The approved flight clearance indicated an IFR flight, via Bed Airway 49, Green Airway 3, and Amber Airway 3, to Denver at a cruising altitude of 15,000 feet, with Omaha, Nebraska, designated as the alternate airport. The flight proceeded in a routine manner and at 0104 reported over Rock Springs, Wyoming, at 15,000 feet, estimating its arrival over Cheyeme, Wyoming, at 0147 and over Denver at 0207 2 Forty-three minutes later, at 0147, the flight reported having passed the Silver Crown fan marker (located 12 miles west of Cheyenne) and requested a lower altitude Accordingly, a new clearance was immediately issued-"ARTC clears United 610 to Dupont intersection, 3 descend to 8500 feet immediately after passing Cheyenne, maintain 8500 feet, no delay expected, contact approach control over Dacono "4 This clearance was acknowledged and the flight reported that it was over Cheyenne at 0147, at 15,000 feet and was now starting to descend. The Denver altimeter setting was then given the flight as being 30 19 inches. Nine minutes later, at 0156, the flight reported reaching its assigned altitude of 8,500 feet No further communication was received from the flight. At 0200, the Denver Control Tower requested the company radio operator to advise the flight to call approach control Repeated calls were made without an answer. It was later determined that Flight 610 had crashed on a mountain (Mt Crystal) 18 miles west-southwest of Fort Collins, Colorado. All 50 occupants were killed.

At Las Vegas, Trip 11-8 remained on the ground 35 minutes. During this time, the crew obtained weather forecasts for the trip to Denver and had the aircraft serviced with 370 gallons of fuel. These forecasts indicated that between south-western Utah and Denver there would be broken to overcast clouds with bases and tops ranging from 8,000 to 20,000 feet in altitude, and that below 8,000 feet there would be light rain showers with light snow showers above this level. The flight was cleared under Instrument Flight Rules to cruise at 13,000 feet to Grand Junction, Colorado, 14,000 feet to Eagle, Colorado, and 16,000 feet to the Dupont Intersection, 5 miles north of Denver, with Laramie, Wyoming, designated as the alternate airport The computed elapsed time was three hours and five minutes with sufficient fuel aboard to fly five hours and five minutes. A forecast for Denver, at 1700, when the flight was estimated to arrive, indicated a ceiling of 700 feet with icing in the clouds above 8,000 feet. At Laramie, the chosen alternate airport, a ceiling of 2,000 feet occasionally lowering to 1,000 feet was forecast with light rain showers expected to change to light snow showers after dark. At 1403, the flight departed Las Vegas, and two hours and two minutes later, at 1605, reported over Grand Junction at an altitude of 13,000 feet, climbing to 14,000. At this time the flight received from INSAC (Interstate Airways Communication) at Grand Junction the 1530 weather observations for Grand Junction, Denver, Eagle and Pueblo, Colorado. Denver was reported having a variable ceiling of 600 feet, overcast and lower broken clouds, visibility six miles, light rain and wind from the north-northwest at 12 miles per hour. When over Eagle, at 1637, the flight reported at an altitude of 14,000 feet and climbing to 16,000. Forty-five minutes later, at 1708, over the Dupont Intersection the flight reported to the Denver Tower and was given the Denver weather as ceiling 200 feet and visibility two miles. As the ceiling and visibility were expected to remain that way for several hours and as the company's landing minimums for Denver were ceiling 400 feet and visibility one mile, the crew requested a change of flight plan. Rock Springs, Wyoming, was chosen as the new alternate and permission was requested to land at Laramie, weather permitting. Denver Air Traffic Control approved and cleared the flight to Rock Springs to maintain 14,000 feet. Twenty-five miles south of Laramie, at 1732, Trip 11 called the Cheyenne Tower and asked permission to change course and to proceed direct to Cheyenne. This was approved by Denver ATC and the crew was further advised by the tower that there was a squall line between Laramie and Cheyenne. The Cheyenne weather reported to the flight at that time was ceiling 3,500 feet, overcast, lower broken clouds and visibility 20 miles. At 1740, the flight reported over the Cheyenne range at 14,000 feet and a special Cheyenne weather report was given the crew which showed the ceiling had lowered to 900 feet and that there was light sleet, and a visibility of 12 miles. Proceeding out the east course of the Cheyenne range, the flight notified the tower that it was low on fuel, taking on ice, and having difficulty in maintaining altitude. A few minutes later clearance was given the flight to descend to 8,000 feet on the north course of Cheyenne range. 2 This was acknowledged and seconds later it encountered severe turbulence. At approximately 1750, an unreadable transmission was heard by the tower. There was definite hysteria in the voice making this transmission. The tower then called the flight several times but no answer was received. Two minutes later at 1752, the tower received the following transmission "We are O. K and are out of it now." About one-half minute later a noise believed to be caused by a surge of power of the aircraft's engines was heard northwest of the tower. Shortly after this a flash of light was seen about two miles northwest of the airport.

Flight 608 departed Los Angeles, California, at 1023 with its destination Chicago, Illinois, to cruise at 19,000 feet according to visual flight rules. Routine position reports were made over Fontana, Daggett and Silver Lake, California; Las Vegas, Nevada; and Saint George, Utah. During the latter report, the flight indicated that it estimated passing over Bryce Canyon, Utah, at 1222. At 1221 Flight 608 reported that a fire had been detected in the baggage compartment which the crew was unable to extinguish. The report added that the cabin was filled with smoke and that the flight was attempting to make an emergency-landing at Bryce Canyon Airport. Shortly thereafter the flight again reported that the “tail is going out--we may get down and we may not.” At 1226 another transmission was received from the flight indicating that it was going into the “best place” available. One minute later the flight reported “we may make it--approaching a strip.” No further contact was had from the flight. Witnesses who observed the aircraft as it was approaching Bryce Canyon from approximately 20 miles southwest first observed what appeared to be white smoke streaming from the aircraft, followed later by dense black smoke. The first witnesses who observed fire in the bottom of the aircraft at approximately the center-section were located approximately 15 miles south of Bryce Canyon. Until shortly before the moment of impact, the aircraft appeared to be under normal control; however, no witnesses were located who observed the crash.

Just before reaching Las Vegas, however, a distance of 268 miles from Burbank, Captain Clark stated that his fuel quantity gauges indicated that he had 360 gallons of fuel remaining. Since he believed this to be sufficient to reach destination, he did not land at Las Vegas which was generally used as a fueling stop for Slick Airways. From Las Vegas to Palmdale, lighter winds were encountered resulting in a ground speed averaging 180 miles per hour. Palmdale was flown over at 1025, at which time the aircraft had been in the air a total of 5 hours and 18 minutes. Three minutes after passing over Palmdale, which was clear, the left engine fuel pressure dropped to 3 pounds, the red fuel warning light came on, and the left engine stopped. Fuel selector valves were changed, and as a result power was restored to the left engine. Captain Clark suspected a fuel leak. He inspected the aircraft for visible loss of fuel or fire, found none, and continued on to Burbank. As the flight approached Newhall California, Burbank reported a ceiling of 1,600 feet with visibility of two and one-half miles. The flight was instructed by the Los Angeles Airways Traffic Control Center to hold on the northwest course of the Burbank range, and advised that the approach clearance Into Burbank could be expected at approximately 1052. Captain Clerk informed the Burbank control tower that he was losing fuel and wanted to land as soon as possible, however, he declined to declare an emergency. Shortly after this, the left engine stopped for the second time, but power was again restored by changing the positions of the fuel selector valves. At 1056, approach clearance into Burbank was given, and at 1058, the flight reported inbound over the Chatsworth fan marker, approximately 14 miles from the Lockheed Air Terminal. The ceiling over Burbank had by this time lowered to 1,000 feet, and rain showers had reduced visibility to about one mile. As the flight descended below 1,600 feet only intermittent bursts of power could be secured from the left engine. The “letdown” was continued, the Burbank radio range station and the Lockheed Air Terminal were passed. Upon completion of a right turn to return to the range station the right engine stopped, and the propeller was immediately feathered. At an altitude of 200 to 400 feet, Captain Clark recognized almost immediately underneath him a hangar on the Lockheed Air Terminal. He executed a sharp right turn of approximately 270 degrees, and landed on the north-south taxi way about 400 feet before crossing Runway 7, a distance of approximately 1,900 feet from the south boundary of the airport. Brakes were applied, but the aircraft could not be brought to a stop within the airport boundaries. It came to rest only after skidding across a highway and railroad line adjacent to the south boundary of the airport.

While flying at an altitude of 10,000 feet in marginal weather conditions, the aircraft hit the slope of Mt Blue Bell Knoll located north of Boulder, Utah. The aircraft was destroyed by impact forces and all three occupants were killed.

On the non stop leg from Boise to Denver, while flying by night and poor visibility, the aircraft hit the slope of Mt Elk located southeast of Elk Mountain, south Wyoming. The wreckage was found few hours later in a deep snow and in poor weather conditions, about 340 feet from the summit. The aircraft was destroyed by impact forces and all 21 occupants were killed. At the time of the accident, the aircraft deviated from the prescribed flight path by 4,5 miles and its altitude was 11,000 feet.

Shortly after a night takeoff from runway 35, the aircraft encountered problems to gain height. During the initial climb, at a height of some 30 feet, the Skytrain hit tree tops located 0.9 mile from the runway end, stalled and crashed in a wooded area, near the shore of the Missouri River. A passenger was seriously injured while 23 other occupants were killed.