Crash of a Convair CV-580 in Bradford: 20 killed

Date & Time:
Type of aircraft:
Operator:
Registration:
N5802
Survivors:
Yes
Schedule:
Detroit – Erie – Bradford – Harrisburg – Washington DC
MSN:
410
YOM:
1957
Flight number:
AL736
Crew on board:
6
Crew fatalities:
Pax on board:
41
Pax fatalities:
Other fatalities:
Total fatalities:
20
Captain / Total flying hours:
6701
Captain / Total hours on type:
1477.00
Copilot / Total flying hours:
4330
Copilot / Total hours on type:
928
Aircraft flight hours:
29173
Circumstances:
Allegheny Airlines Flight 736 departed Detroit, MI for a flight to Washington, DC with intermediate stops at Erie, Bradford and Harrisburg, PA. The Convair CV-580 took off from Erie at 19:46. At 20:06 Flight 736 reported over the VOR outbound at the beginning of the instrument approach procedure. Erie Approach Control then told the crew to contact the Bradford Flight Service Station (FSS). At 20:08:47 the flight reported that they were doing the procedure turn inbound for runway 32 and Bradford FSS told them wind was 290 degrees at 15 knots. The Convair descended in light snow showers until the aircraft contacted trees along terrain which had an average upslope of 1.5deg some 2,5 NM short of the runway. The airplane cut a swath through the trees and impacted the ground at a point 800 feet from the initial tree contact. The fuselage came to rest inverted.
Probable cause:
The continuation of the descent from the final approach fix through the Minimum Descent Altitude and into obstructing terrain at a time when both flight crewmembers were looking outside the aircraft in an attempt to establish visual reference to the ground. Contributing factors were the minimal visual references available at night on the approaches to the Bradford Regional Airport; a small but critical navigational error during the later stages of the approach; and a rapid change in visibility conditions that was not known to the crew.
Final Report:

Crash of a Lockheed L-382B-10C Hercules in Prudhoe Bay: 2 killed

Date & Time:
Type of aircraft:
Operator:
Registration:
N760AL
Flight Type:
Survivors:
Yes
Schedule:
Fairbanks - Prudhoe Bay
MSN:
4229
YOM:
1967
Crew on board:
4
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
2
Captain / Total flying hours:
18000
Captain / Total hours on type:
936.00
Circumstances:
During the final approach completed by night, the crew encountered poor weather conditions with snow falls. At an altitude of 200 feet, the pilot-in-command lost sight of the runway and decided to attempt a go-around when the airplane struck obstacles and crashed short of runway. Two crew members were killed while two others were injured.
Probable cause:
The accident was probably caused by the combination of the following factors:
- The pilot-in-command continued under VFR mode into adverse weather conditions,
- Delayed in initiating go-around,
- Downdrafts,
- Obstruction to vision,
- Blowing snow,
- Pilot lost visual reference due to blowing snow.
Final Report:

Crash of a Mitsubishi MU-2B-10 Marquise near Pleasant Hope: 5 killed

Date & Time:
Type of aircraft:
Registration:
N3550X
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Joplin – Tallahassee
MSN:
18
YOM:
1967
Crew on board:
1
Crew fatalities:
Pax on board:
4
Pax fatalities:
Other fatalities:
Total fatalities:
5
Captain / Total flying hours:
2910
Captain / Total hours on type:
100.00
Circumstances:
While in cruising altitude, the twin engine aircraft went out of control, entered a dive and crashed in a near vertical attitude in a field located five miles south of Pleasant Hope. The aircraft was destroyed and all five occupants were killed.
Probable cause:
Loss of control for undetermined reason. It was reported that the pilot attempted operation with known deficiencies in equipment. Malfunction of the artificial horizon and turn needle.
Final Report:

Crash of a Beechcraft G18 in Kenai

Date & Time:
Type of aircraft:
Operator:
Registration:
N5730U
Survivors:
Yes
MSN:
BA-489
YOM:
1960
Location:
Crew on board:
2
Crew fatalities:
Pax on board:
7
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
2525
Captain / Total hours on type:
470.00
Circumstances:
While approaching Kenai, the crew encountered icing conditions. During a last turn to join the approach path, the twin engine aircraft stalled and crashed few km short of runway. All nine occupants were injured, four of them seriously.
Probable cause:
The accident was probably caused by the combination of the following factors:
- The pilot failed to obtain/maintain flying speed,
- Poorly planned approach,
- Aircraft not aligned with runway,
- Icing conditions, including sleet and freezing rain,
- Fog,
- Heavy aircraft icing with ice fog encountered during circling approach,
- Stalled during attempt to align with runway.
Final Report:

Crash of a Rockwell Aero Commander 500 in Glendive: 1 killed

Date & Time:
Operator:
Registration:
N6281X
Flight Phase:
Survivors:
Yes
Schedule:
Glendive – Hilger
MSN:
500-1150-82
YOM:
1962
Crew on board:
1
Crew fatalities:
Pax on board:
6
Pax fatalities:
Other fatalities:
Total fatalities:
1
Captain / Total flying hours:
3379
Captain / Total hours on type:
302.00
Circumstances:
During the takeoff roll at Glendive-Dawson County Airport, the pilot encountered engine trouble and decided to abandon the takeoff procedure and attempted an emergency braking manoeuvre. On a runway covered with two inches of snow, the aircraft was unable to stop within the remaining distance, overran and came to rest down a bank. Six occupants were injured and a passenger was killed.
Probable cause:
The probable cause of the accident was the combination of the following factors:
- Engine failure caused by the malfunction of the ignition system which was improperly secured,
- Engine structure, valve assemblies,
- Improper alignment/adjustment,
- Inadequate maintenance and inspection,
- Runway covered by two inches of snow,
- The pilot knew that the left magneto was inoperative and attempted operation with known deficiencies in equipment,
- Number 4 cylinder exhaust valve failed during takeoff.
Final Report:

Crash of a Rockwell Aero Commander 500B near Imnaha: 1 killed

Date & Time:
Operator:
Registration:
N5080
Flight Phase:
Flight Type:
Survivors:
No
Site:
MSN:
500-1537
YOM:
1965
Location:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Captain / Total flying hours:
5000
Captain / Total hours on type:
120.00
Circumstances:
While on a night mail flight, the pilot encountered poor weather conditions when both engines stopped simultaneously. The pilot attempted an emergency landing when control was lost and the airplane crashed on a 40° slope mountain. SAR operations were conducted but eventually suspended few days later as no trace of the aircraft nor the pilot was found. Mountaineers found the wreckage on March 21, 1969 near Imnaha.
Probable cause:
The probable cause of the accident was the combination of the following factors:
- Inadequate preflight preparation on part of the pilot,
- Fuel system; vents, drains, tank caps improperly secured,
- Fuel exhaustion,
- Complete failure of both engines in flight,
- Fuel siphoned from loose cap.
Final Report:

Crash of a Grumman G-44 Widgeon on Sanak Island

Date & Time:
Type of aircraft:
Operator:
Registration:
N148M
Flight Phase:
Survivors:
Yes
MSN:
1220
YOM:
1942
Crew on board:
1
Crew fatalities:
Pax on board:
3
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
11500
Captain / Total hours on type:
3000.00
Circumstances:
While taking off from a lagoon off Sanak Island, the airplane failed to get airborne, struck the shore and crashed. All four occupants were injured, two of them seriously. The aircraft was written off.
Probable cause:
The accident was probably caused by the combination of the following factors:
- The pilot failed to obtain/maintain flying speed,
- Sudden windshift,
- Quartering tailwind up to 30 knots,
- The pilot attempted to takeoff from a lagoon at low tide.
Final Report:

Crash of a Lockheed L-1649 Starliner in Las Vegas

Date & Time:
Type of aircraft:
Registration:
N7314C
Flight Phase:
Survivors:
Yes
MSN:
1016
YOM:
1957
Crew on board:
8
Crew fatalities:
Pax on board:
96
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
19250
Captain / Total hours on type:
1700.00
Circumstances:
After liftoff at McCarran Airport, while in initial climb, the crew raised the landing gear when two engines suffered a simultaneous loss of power. The captain initiated an immediate landing and the airplane belly landed on the runway and slid for few dozen yards before coming to rest. All 104 occupants were evacuated safely while the aircraft was damaged beyond repair.
Probable cause:
The accident was probably caused by the combination of the following factors:
- Aircraft improperly serviced by ground crew,
- Fuel contamination, improper fuel grade,
- Premature liftoff,
- Intentional wheels-up landing,
- Suspected mechanical discrepancy,
- Erroneously serviced with jet fuel,
- Aircraft airborne prior to V2 speed.
Final Report:

Crash of a Rockwell Aero Commander 560F near Wolf Creek: 3 killed

Date & Time:
Registration:
N6257X
Flight Phase:
Survivors:
No
Schedule:
Great Falls - Missoula
MSN:
560-1115-33
YOM:
1961
Crew on board:
1
Crew fatalities:
Pax on board:
2
Pax fatalities:
Other fatalities:
Total fatalities:
3
Captain / Total flying hours:
7157
Captain / Total hours on type:
107.00
Circumstances:
While in cruising altitude, the pilot encountered poor weather conditions with thunderstorm activity, turbulences, high winds and freezing rain. Under VFR mode, he lost control of the airplane that dove into the ground and crashed. All three occupants were killed.
Probable cause:
The accident was probably caused by the combination of the following factors:
- The pilot continued under VFR mode into adverse weather conditions,
- Loss of control for undetermined reason,
- Icing conditions including sleet and freezing rain,
- Turbulences associated with clouds and thunderstorms,
- Flew into known turbulences.
Final Report:

Crash of a Cessna 411 in Houston: 1 killed

Date & Time:
Type of aircraft:
Operator:
Registration:
N7392U
Flight Phase:
Survivors:
No
MSN:
411-0092
YOM:
1965
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Captain / Total flying hours:
3500
Captain / Total hours on type:
300.00
Circumstances:
After takeoff, while climbing, the left engine failed. The pilot lost control of the airplane that crashed near the runway. The aircraft was destroyed and the pilot was killed.
Probable cause:
The accident was probably caused by the combination of the following factors:
- Failure of the left engine during initial climb,
- Failure of the fuel system, loose parts/fitting, leak/leakage,
- Lack of lubrication on specific part,
- Powerplant scored,
- Fuel starvation,
- Inadequate maintenance and inspection,
- Improper emergency procedures,
- The pilot failed to obtain/maintain flying speed,
- Complete engine failure,
- Leaking fitting in engine driven fuel pump,
- Bearing dry, armature scored in auxiliary fuel pump on left engine.
Final Report: