Crash of a Douglas C-54-DO Skymaster in Seattle: 28 killed

Date & Time: Nov 17, 1955 at 2359 LT
Type of aircraft:
Registration:
N88852
Flight Phase:
Survivors:
Yes
Site:
Schedule:
Seattle – Newark
MSN:
3123
YOM:
1942
Flight number:
PNS17K
Crew on board:
4
Crew fatalities:
Pax on board:
70
Pax fatalities:
Other fatalities:
Total fatalities:
28
Captain / Total flying hours:
5920
Captain / Total hours on type:
1000.00
Copilot / Total flying hours:
5778
Copilot / Total hours on type:
531
Aircraft flight hours:
19630
Circumstances:
Peninsular Air Transport Common Carriage Flight 17K was scheduled to originate at Boeing Field and terminate at Newark, New Jersey, with intermediate refueling stops. The assigned crew consisted of Captain W. J. McDougall, First Officer F. C. Hall, and Steward J. O. Adams. The third pilot, Edward, McGrath, deadheading to Miami, Florida, occupied the jump seat with no crew duties. The flight, scheduled to depart at 2030, was delayed because of a heavy snowfall during the afternoon and early evening of November 17 which delayed passenger arrivals and necessitated removal of snow from the aircraft before departure. At 2332 the flight taxied to runway 13, holding off the runway waiting its turn behind other flights to take off, During this time the crew completed pre-takeoff cheeks and received an IFR (Instrument Flight Rules) clearance. This, in part, instructed them to turn right after takeoff and climb on the northwest course of the Seattle Range to 5,000 feet m. s. 1. (mean sea level). The takeoff was started at 2358 and appeared normal as the landing gear retracted and right turn was begun. When approximately 300-400 feet above the ground the first reduction of power, from takeoff to normal rated power, was made and about five of the 15 degrees of flaps extended, were retracted. At this time the No. 4 propeller surged and engine r. p. m. increased to about 2,800. Unable to reduce the r. p. m. of No. 4 by reducing its power an attempt was made to feather the propeller; this also was unsuccessful. As the aircraft then began to descend takeoff power was reapplied to Nos. 1, 2, and 3 engines and the power from No. 4 was further reduced. This action did not reduce the r. p. m. of No. 4 which surged again and increased to more than 3,000. The aircraft veered to the right and continued to descend. Realising that a crash-landing was imminent Captain McDougall reduced the airspeed until the aircraft was nearly stalled and applied full power to all four engines. The aircraft continued to settle. It then struck a telephone pole and several trees before crash-landing in a nose-high attitude. Fire and rescue equipment was dispatched to the scene from both the Seattle Fire Department and the Seattle-Tacoma Airport. The units arrived promptly and gave first aid to the survivors. Fire which followed the crash was quickly extinguished but not before extensive property was burned and the aircraft was nearly consumed. One crew member and 27 passengers were killed.
Probable cause:
The Board determines that the probable cause of this accident was the excessively high drag resulting from the improperly indexed propeller blades and inability to feather. These conditions were the result of a series of maintenance errors and omissions. The following findings were reported:
- Weather conditions at takeoff were above minim with respect to ceiling and visibility,
- There was no snow or ice on the aircraft when it took off,
- During the first power reduction the No. 4 engine r. p. m. fluctuated, became uncontrollable, and shortly thereafter increased to more than 3,000,
- Efforts to reduce the r. p. m. and feather the malfunctioning propeller were unsuccessful,
- The propeller dome retaining nut was not tightened sufficiently permitting oil to leak around the dome seal,
- The leaking oil resulted in a lack of oil for reducing the r. p. m. or feathering the No. 4 propeller,
- Poor maintenance procedures, omissions during maintenance, and lack of proper inspection were evident in the maintenance work performed by Seattle Aircraft Repair, Inc,
- Improper indexing of the No. 4 propeller blades occurred during the work at Seattle,
- Propeller drag from the overspeeding No. 4 propeller greatly increased by the incorrect indexing of the blades made continued flight difficult if not impossible,
- The aircraft was unairworthy following the Seattle maintenance work.
Final Report:

Crash of a Douglas C-124C Globemaster II at Larson AFB

Date & Time: Jun 25, 1954
Operator:
Registration:
51-7272
Flight Type:
Survivors:
Yes
MSN:
43724
YOM:
1951
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Crash landed at Larson AFB. No casualties.

Crash of a Convair B-36B-1-CF Peacemaker at Fairchild AFB: 7 killed

Date & Time: Mar 29, 1954
Type of aircraft:
Operator:
Registration:
44-92032
Flight Phase:
Flight Type:
Survivors:
Yes
Schedule:
Fairchild - Fairchild
MSN:
29
YOM:
1946
Crew on board:
10
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
7
Circumstances:
The crew was completing a local training mission at Fairchild AFB. During an aborted takeoff, the airplane crashed in unclear circumstances. Seven crew members were killed and three others were injured.

Ground fire of a Convair B-36B-15-CF Peacemaker at Fairchild AFB

Date & Time: Feb 26, 1954
Type of aircraft:
Operator:
Registration:
44-92069
Flight Phase:
Flight Type:
Survivors:
Yes
Schedule:
Fairchild - Fairchild
MSN:
66
YOM:
1946
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Following an uneventful training mission, the crew was returning to Fairchild AFB. After touchdown, the pilot completed the braking procedure and vacated the runway via a taxiway when one of the main landing gear collapsed. The aircraft came to a halt in flames and while all occupants were able to evacuate safely, the aircraft was completely destroyed by fire. It was reported that one of the undercarriage collapsed and punctured a fuel tank. The fire could not be extinguished in time.
Probable cause:
Undercarriage collapsed during taxi.

Crash of a Fairchild C-82A Packet in Yelm

Date & Time: Feb 14, 1954
Type of aircraft:
Operator:
Registration:
48-0569
Flight Phase:
Flight Type:
Survivors:
Yes
MSN:
10204
YOM:
1948
Location:
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
An engine failed in flight, forcing the crew to attempt an emergency landing. The airplane belly landed in a field located one mile north of Yelm and came to rest. There were no casualties but the aircraft was written off.
Probable cause:
Engine failure.

Crash of a Lockheed L-1049 Super Constellation in McChord AFB

Date & Time: Sep 6, 1953 at 0231 LT
Operator:
Registration:
N6214C
Survivors:
Yes
Schedule:
Seattle – Chicago
MSN:
4014
YOM:
1952
Flight number:
NW008
Crew on board:
6
Crew fatalities:
Pax on board:
26
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
10863
Captain / Total hours on type:
263.00
Copilot / Total flying hours:
4230
Copilot / Total hours on type:
206
Aircraft flight hours:
4509
Circumstances:
Northwest Airlines' Flight 8 departed Seattle-Tacoma Airport at 0148, September 6, 1953, for a nonstop flight to Chicago, Illinois. Gross weight on takeoff was 105,839 pounds; maximum allowable for takeoff was 116,740; maximum allowable for landing was 98.500 pounds. The location of the center of gravity was within prescribed limits. Weather at Seattle-Tacoma Airport during takeoff was: ceiling 200 feet and one-fourth mile visibility. Just after the aircraft became airborne No. 3 propeller oversped. Attempts by the flight engineer to correct this condition were unsuccessful and feathering was started one and one-half minutes later. However, the propeller continued to rotate at about 400 r.p.m. The flight's takeoff alternate was Yakima, Washington (a distance of 122 miles), but due to high terrain en route the captain elected to request clearance to proceed to Portland, Oregon (a distance of 132 miles), at 5,000 feet. This clearance was granted immediately. Using METO 2 power the aircraft reached 5,000 feet, well above the overcast, about 14 minutes after takeoff. Near the end of this climb the oil temperature of No. 4 engine was exceeding limits and the oil supply was being rapidly reduced. The flight engineer attempted to lower the temperature by fully opening the oil cooler flap. Temperature, however, remained high and the oil quantity continued to dwindle fast. Accordingly, the No. 4 propeller was feathered at about 0205 at the order of the captain who then declared an emergency and elected to land at McChord Air Force Base. Radio communication was established with McChord and arrangements made for a GCA approach after a short delay in establishing a frequency. No. 3 propeller had not feathered fully and was still windmilling at approximately 400 r.p.m. Meanwhile the captain had requested "takeoff" flaps, but the flaps would not extend hydraulically, and the copilot went to the cabin to crank them down. He stated that he turned the crank about 15-20 turns, at which point he found that it would no longer turn freely, whereupon he backed it to its original position. He was then called back to the cockpit to assist the captain in controlling the aircraft. Control difficulty had been continuously experienced with the aircraft yawing sharply and dropping a wing. The captain had placed the trim controls approximately in neutral, believing that he had a better feel and control of the aircraft without them at the recommended minimum speed of 130 knots. The aircraft, which had re-entered the overcast at about 2,000 feet, was then several miles from McChord Field under GCA direction on its first approach when its position and heading became such that the GCA operator directed a box pattern be flown to establish a proper approach. The second approach was executed in accordance with the directed pattern and the final approach was in line with Runway 34. The landing gear control was not actuated for gear extension until the aircraft broke out of the overcast at an altitude estimated at between 500 and 800 feet on a GCA controlled straight-in approach to Runway 34. At this time the captain ordered that No. 3 be unfeathered but it would not unfeather and continued to windmill. Only the right main gear extended fully and locked, as Indicated by its green light, but the landing was then committed. Shortly after touchdown retraction of the unlocked nose and left main gears allowed the aircraft to veer off the runway to the left. It then skidded sideways to its right, folding the right main gear inward, and the No. 2 engine was torn free. The aircraft came to rest on a heading of 212 degrees some 3,000 feet from the point of touch and about 7,000 feet short of the far end of the 10,000-foot runway. At about that time a gasoline fire started and spread rapidly over the ground below the airplane. Previously alerted fire apparatus, already standing by, kept the fire from spreading while all passengers and four of the crew left quickly by the main cabin door, the door sill being five or six feet above the ground. The flight engineer and the captain left by the cockpit crew door after ascertaining the cabin to be empty. All 32 occupants ware clear within an estimated two minutes. There were no fatalities although several persons were treated for burns at the McChord Air Force Base Hospital.
Probable cause:
The Board determines that the probable cause of this accident was a sequence of mechanical failures resulting in an emergency landing under adverse weather conditions with insufficient hydraulic pressure in the secondary system to extend fully the landing gear in the time available. A contributing factor was the design of the hydraulic system which did not permit use of the available pressure in the primary system for that purpose. The following findings were pointed out:
- Shortly after takeoff the aircraft lost the use of No. 3 engine due to an overspeeding propeller, and continued windmilling,
- Weather conditions at Seattle-Tacoma were satisfactory for takeoff but were below landing minimums and the captain elected to proceed to Portland,
- After reaching cruising altitude No. 4 propeller was feathered because of high engine oil temperature and depletion of oil supply,
- After losing the use of No. 4 engine, the captain declared an emergency and set up a GCA approach to McChord Air Force Base,
- A malfunction of the landing gear selector valve prevented normal use of the diminished hydraulic pressure to extend the flaps,
- A GCA instrument approach to McChord was necessary because of weather conditions. The captain decided that he would extend the gear only after breaking out under the low overcast,
- The short time interval between breaking out and touchdown was insufficient for extension and locking of all three landing gears with the existing hydraulic pressure,
- After touchdown the unlocked and partially extended left main and nose gears were forced up into their wheel wells with complete loss of control of the aircraft's ground movement, and fire occurred after rupture of the fuel tanks,
- The functional failure of No. 3 propeller governor was due to foreign metallic particles,
- The reason for the loss of oil supply for No. 4 engine was undetermined,
- The landing gear selector valve was improperly seated, resulting in insufficient hydraulic pressure.
Final Report:

Crash of a Douglas C-49K near Vail: 21 killed

Date & Time: Sep 1, 1953 at 1830 LT
Type of aircraft:
Operator:
Registration:
N19941
Flight Phase:
Survivors:
No
Site:
Schedule:
Fort Ord - McChord
MSN:
6333
YOM:
1942
Location:
Crew on board:
2
Crew fatalities:
Pax on board:
19
Pax fatalities:
Other fatalities:
Total fatalities:
21
Captain / Total flying hours:
3935
Captain / Total hours on type:
1000.00
Copilot / Total flying hours:
2085
Copilot / Total hours on type:
500
Aircraft flight hours:
8398
Circumstances:
The aircraft was performing a special flight from Fort Ord AFB (Monterey) to McChord AFB, carrying 19 military passengers and two pilots. En route, the crew cancelled the IFR flight plan and continued under VFR in poor weather conditions. At an altitude of 2,600 feet in foggy conditions, the aircraft hit the slope of a mountain, was totally destroyed by impact forces and a post crash fire and all 21 occupants were killed.
Probable cause:
The Board finds that the probable cause of this accident was the pilot’s attempt to continue flight under the provisions of Visual Flight Rules during instrument conditions. The following findings were pointed out:
- All ground radio facilities were functioning normally,
- An instrument flight plan had been cancelled and the flight was proceeding in accordance with visual flight rules,
- The crash occurred during daylight on a fog-covered hillside at an altitude of about 2,600 feet MSL,
- The crash site was on the airway and the direction of impact was near the on-course heading.
Final Report:

Crash of a Curtiss C-46F-1-CU Commando near Cedar Falls: 2 killed

Date & Time: Apr 23, 1953 at 0055 LT
Type of aircraft:
Registration:
N1693M
Flight Phase:
Flight Type:
Survivors:
Yes
Site:
Schedule:
Columbia – Cheyenne – Seattle
MSN:
22498
YOM:
1945
Crew on board:
2
Crew fatalities:
Pax on board:
2
Pax fatalities:
Other fatalities:
Total fatalities:
2
Captain / Total flying hours:
6790
Captain / Total hours on type:
2538.00
Copilot / Total flying hours:
348
Copilot / Total hours on type:
88
Aircraft flight hours:
7477
Circumstances:
American Air Transport, Inc., an irregular air carrier, was operating this flight as a ferry operation from Columbia. South Carolina to Seattle, Washington for the purpose of later conducting a Civil Air Movement of military personnel from Seattle. Captain John W. Schroeder and First Officer James P. Gilbert flew the aircraft from Columbia to Cheyenne, Wyoming, departing Columbia at 1305 EST, April 22, 1953, and arriving at Cheyenne at 1835 MST of the same date. The flight from Columbia to Cheyenne was completed without incident. A second crew, Captain Maurice A. Booska, Chief Pilot of the company, and First Officer Donald F. Dwelley, rode as passengers to Cheyenne, at which point they relieved Schroeder and Gilbert, who continued with the flight as passengers. The aircraft was serviced at Cheyenne, making the total fuel load 1,200 gallons of 100-octane gasoline. Captain Booska received a weather briefing at the U. S. Weather Bureau Airport Station; following this, he filed a VFR flight plan to Boise, Idaho via Airways Green 3 and Red 1. Departing from Cheyenne at 2043 MST (delayed owing to repair of the left navigation light), the flight proceeded uneventfully. The pilot made position reports over Rawlins and Rock Springs. Wyoming; Malad City and Burley, Idaho; and three minutes east of Boise at 2252. In all position reports except Rock Springs and Malad City (where no altitude was given) the flight altitude was reported as 12,000 feet. Upon request from the flight, Boise radio furnished the Boeing Field-Seattle forecast and the 2228 en route weather between Boise and Seattle. The pilot then filed an IFR flight plan to destination, and the following clearance was transmitted by Boise radio at 2254: "ATC CLEARS N1693M TO THE SEATTLE RANGE VIA RED 1, BLUE 32 BLUE 12, GREEN 2. MAINTAIN 12,000 FEET." The clearance was acknowledged by the pilot. Later position reports indicated that the flight was at 12,000 feet when over Baker. Oregon at 2331 and Pendleton, Oregon at 2353. Near Yakima, Washington the flight was cleared for descent to 10,000 feet and upon reporting over Yakima at 0026, it was further cleared to descend to and maintain 8,000 feet. Ellensburg, Washington radio received a position report at 0037 that the flight passed over Ellensburg 2 at 0034, 8,000 feet. IFR. Ellensburg radio transmitted the Boeing Field 2330 weather to the flight at 0040; the pilot acknowledged and advised that he would contact Seattle Air Route Traffic Control Center on 120.3 megacycles when over Easton, Washington. The pilot contacted Seattle Center at 0047 and reported over Easton at 8,000 feet, inbound to Boeing Field. Seattle Center thereupon issued the following clearance: "NECTAR ONE SIX NINE THREE METRO YOU ARE CLEARED TO CROSS HOBART AT 8,000 SEATTLE AT OR ABOVE 4,000 MAINTAIN 4,000 NO DELAY EXPECTED CONTACT SEATTLE APPROACH CONTROL OVER HOBART FOR FURTHER CLEARANCE OVER." The controller in the Seattle Center who was handling this flight was at his control board, about four feet from a loud-speaker installed on top of the unit. The read-back of the clearance by the pilot of N1693M seemed to the controller to be as follows: "ROGER, CLEARED TO - - - -(distinct pause involving a lapse of three or four seconds) CROSS THERE FOUR THOUSAND OR ABOVE THE RANGE STATION, AH, FOUR THOUSAND, REPORT HOBART TO YOU." A correction. "NEGATIVE REPORT HOBART TO SEATTLE APPROACH CONTROL," was then immediately transmitted. The pilot replied, "HOBART TO SEATTLE APPROACH CONTROL ROGER." These contacts were made at approximately 0048. There was no record of further transmission from the aircraft. When the pilot failed to report over Hobart, and the flight became overdue at Seattle, controllers in the Seattle Center and Boeing Field tower attempted to contact the flight, but without success. Search and rescue activities were then instituted. The accident scene was found the next day and the two survivors were rescued.
Probable cause:
The Board determines that the probable cause of this accident was the pilot's misunderstanding of the clearance, failure to check en route altitude against available charts, and descent below prescribed minimum en route altitude. The fact that the controller did not detect the first of two errors made by the pilot was a contributing factor. The following findings were pointed out:
- The read-back of the clearance by the pilot was in error on two points - crossing altitude for Hobart, and the erroneous understanding that he was to report to the Seattle Center over Hobart; the controller detected only the latter error,
- The aircraft descended below the minimum altitude of 8,000 feet and crashed near the crest of a mountain at 4,000 feet MSL,
- Both pilots probably experienced impaired efficiency due to oxygen want and fatigue,
- There was no malfunction or failure of any component of the aircraft.
Final Report:

Crash of a Douglas R4D-8 in Chehalis: 1 killed

Date & Time: Apr 23, 1953
Operator:
Registration:
17196
Flight Phase:
Flight Type:
Survivors:
Yes
MSN:
43357
YOM:
1944
Crew on board:
11
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Circumstances:
An unexpected situation was encountered in flight and ten crew members bailed out and abandoned the aircraft that crashed in Chehalis. The eleventh occupant who stayed on board was killed.

Crash of a Douglas DC-3C near Cedar Falls: 7 killed

Date & Time: Apr 14, 1953 at 0222 LT
Type of aircraft:
Operator:
Registration:
N65743
Flight Phase:
Survivors:
Yes
Site:
Schedule:
Washington DC – Cleveland – Chicago – Minneapolis – Fargo – Billings – Spokane – Seattle
MSN:
20432
YOM:
1944
Crew on board:
3
Crew fatalities:
Pax on board:
22
Pax fatalities:
Other fatalities:
Total fatalities:
7
Captain / Total flying hours:
5100
Captain / Total hours on type:
2061.00
Copilot / Total flying hours:
1840
Copilot / Total hours on type:
38
Aircraft flight hours:
12185
Circumstances:
The flight departed Washington National Airport, Washington, D. C., at 0007 EST, April 13, with 12 passengers and crew consisting of Captain L. T. Brannan, Copilot O. T. Thorson, and Stewardess A. Long. At Wilkes-Barre, Pennsylvania, 10 additional passengers plus relief crew Captain A. J. Lerette and Copilot W. E. Harshman boarded the aircraft. These pilots were deadheading to Fargo, North Dakota, where they were to relieve the other pilots. The destination for all passengers was Seattle, Washington. The flight stopped at Cleveland, Ohio, for fuel and oil and arrived at Chicago at 0735 CST. Shortly after takeoff at Chicago, the flight returned owing to rough operation of the left engine. The left magneto of this engine was replaced by a spare carried on the aircraft and the flight again departed at 1215 CST for Minneapolis, made a fuel stop there, and arrived at Fargo, North Dakota, at 16140 CST. Captain Brannan and Copilot Thorson left the flight at this point. One of the relief pilots inquired about the availability of an engine mechanic, stating that one of the engines was spitting and coughing. When he was told it would take about 15 minutes to get a mechanic, he said to disregard it. The left engine started with some difficulty. The flight departed Fargo at 1748 CST and made fuel stops at Billings, Montana, and Felts Field, Spokane, Washington. The pilots did not report any mechanical difficulties over this segment. The flight departed Spokane at 0035, April 14, on an IFR flight plan via Green Airway 2,5,000 feet to Ephrata, Washington, 7,000 feet to Ellensburg, Washington, and 8,000 feet to Seattle. Routine position reports were made, the last being over Ellensburg at 0143 and climbing to 8,000 feet from 7,000. At approximately 0200 the Seattle ARTC Center heard a call on 120.3 mega-cycles from an unidentified aircraft which was believed to be N 657143, advising that estimated time of arrival at Seattle was 0227 and that the aircraft was standing by on Boeing Field Tower frequency (118.3 megacycles). At 0207 the pilot of N 65743 reported an engine failure and requested further clearance. Seattle Center advised the aircraft to contact Seattle Approach Control or Boeing Tower as soon as practicable and cleared at to cross Seattle at or above 4,000, no delay expected. Later transmissions from the aircraft were on Boeing Field Tower frequency, rather than the Approach Control frequency of 119.5 megacycles. Signals from the aircraft were weak and difficult to read by both Approach Control (located in the Seattle-Tacoma Tower) and by the Boeing Field Tower. However, Approach Control had less difficulty than Boeing Field Tower in hearing the aircraft on 118.3 megacycles, so the controller cooperated with Boeing Tower in furnishing them with the content of messages through interphone. The pilot could apparently hear Boeing Tower, but not Approach Control. At 0214, Approach Control heard the pilot of N 65743 report that he was icing up and losing altitude. The flight was cleared for an approach to Boeing Field by the Boeing Field controller upon instructions from Approach Control, and was given current Seattle weather conditions. The last transmission from the aircraft was received at 0222, reporting that the flight was at 4,800 feet. Search and rescue activities were instituted shortly thereafter. Two crew members and five passengers were killed while 18 others were rescued. The aircraft was destroyed.
Probable cause:
The Board determines that the probable cause of this accident was the progressive failure of both engines, due to the lack of compliance with proper maintenance standards. The following findings were pointed out:
- The flight returned to Chicago a few minutes after departure owing to malfunction of the left engine, and the left magneto was changed; this magneto was later found to be in a satisfactory condition,
- Although engine malfunctions were again experienced while en route west of Chicago, the pilots failed to have the difficulties corrected,
- First one engine, then the other, progressively failed while the flight was on its last route segment, resulting in a crash in the Cascade Mountains,
- There was evidence that detonation and preignition took place in both engines and that they ultimately failed as a result of master rod bearing failures,
- Spark plugs in both engines had been operated beyond their normal maintenance inspection period and exhibited evidence of a condition conducive to detonation and preignition.
Final Report: