Crash of an Antonov AN-12 in Russia: 6 killed

Date & Time: Apr 25, 1973
Type of aircraft:
Operator:
Flight Type:
Survivors:
No
Country:
Region:
Crew on board:
6
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
6
Circumstances:
The crew was completing a night training mission somewhere in Russia. On final approach, the airplane descended below the glide, struck power cables and crashed in flames. All six crew members were killed.
Probable cause:
It was determined that the accident was caused by a wrong altimeter setting. A difference of 100 meters was reported.

Crash of a Tupolev TU-104B in Leningrad: 2 killed

Date & Time: Apr 23, 1973 at 1506 LT
Type of aircraft:
Operator:
Registration:
CCCP-42505
Survivors:
Yes
Schedule:
Leningrad – Moscow
MSN:
0 2 19 03
YOM:
1960
Flight number:
SU2420
Country:
Region:
Crew on board:
6
Crew fatalities:
Pax on board:
51
Pax fatalities:
Other fatalities:
Total fatalities:
2
Aircraft flight hours:
17095
Aircraft flight cycles:
10698
Circumstances:
After takeoff from Leningrad-Shosseinaya Airport, while cruising at an altitude of 7,800 meters, a stewardess informed the cockpit crew about a passenger who wanted to fly to Stockholm and was carrying a pistol and a hand grenade. After entering the cockpit, the hijacker stand by the flight engineer. The crew returned to Leningrad-Shosseinaya and on final approach, while at a height of 120-140 meters, the captain asked the copilot to lower the gear. When the hijacker realized they were flying back to Leningrad, he unpin the grenade that exploded in the cockpit, causing a huge hole in the fuselage. The hijacker and the flight engineer were killed while both pilots were slightly injured. 30 seconds later, the pilots were able to land the airplane at a speed of 310 km/h. After touchdown, the nose gear collapsed and the airplane slid for several dozen meters before coming to a halt. All 55 other occupants were uninjured while the aircraft was not repaired.
Probable cause:
Hijacked after takeoff and severely damaged by the explosion of a grenade and the failure of the nose gear after landing.

Crash of a Cessna 207 Skywagon in Goroka: 4 killed

Date & Time: Apr 23, 1973
Operator:
Registration:
VH-UBY
Flight Phase:
Flight Type:
Survivors:
No
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
3
Pax fatalities:
Other fatalities:
Total fatalities:
4
Circumstances:
During initial climb, the single engine airplane stalled and crashed by an airport road. The aircraft was destroyed and all four occupants were killed, a pilot, a missionary and two passengers.

Crash of a Beechcraft E18S in Davenport: 6 killed

Date & Time: Apr 19, 1973 at 1704 LT
Type of aircraft:
Operator:
Registration:
N310WA
Survivors:
No
Schedule:
Muscatine - Davenport - Chicago
MSN:
BA-12
YOM:
1954
Location:
Crew on board:
1
Crew fatalities:
Pax on board:
5
Pax fatalities:
Other fatalities:
Total fatalities:
6
Captain / Total flying hours:
6000
Captain / Total hours on type:
2000.00
Circumstances:
On approach to Davenport Airport, the right wing detached. The twin engine airplane went out of control and crashed in an open field located few miles from the airfield. The aircraft was totally destroyed and all six occupants were killed.
Probable cause:
Structural failure of the right wing on descent due to fatigue cracks. The following factors were reported:
- Airframe, wings spars,
- Fatigue fracture,
- Inadequate inspection of aircraft on part of the maintenance personnel,
- Preexisting crack on lower spar cap WS-81 that was discernible but not detected over a 6-year period,
- Right wing folded upward.
Final Report:

Ground accident of a Nord 2501D Noratlas in Israel

Date & Time: Apr 18, 1973
Type of aircraft:
Operator:
Registration:
4X-FAO/072
Flight Phase:
Flight Type:
Survivors:
Yes
MSN:
89
YOM:
1956
Country:
Region:
Crew on board:
3
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Parked on apron, the airplane was completing an engine run with three technicians on board. The airplane jumped over the chocks, rolled for few meters before colliding with a concrete wall. All three occupants were injured and the aircraft was damaged beyond repair.

Crash of a Nord 2501D Noratlas in Djibouti City

Date & Time: Apr 18, 1973
Type of aircraft:
Registration:
9XR-KH
Flight Phase:
Flight Type:
Survivors:
Yes
Schedule:
Djibouti City - Kigali
MSN:
94
YOM:
1956
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
While taking off from Djibouti City Airport, the twin engine airplane stalled and crashed near the runway end. The aircraft was destroyed and both pilots were seriously injured. They were completing a cargo flight on behalf of Wolfair.
Probable cause:
The aircraft stalled just after rotation following an engine failure.

Crash of a De Havilland DHC-6 Twin Otter 100 in Bamyan: 4 killed

Date & Time: Apr 18, 1973
Operator:
Registration:
YA-GAT
Flight Phase:
Survivors:
Yes
Schedule:
Bamyan - Kabul
MSN:
111
YOM:
1968
Location:
Country:
Region:
Crew on board:
3
Crew fatalities:
Pax on board:
16
Pax fatalities:
Other fatalities:
Total fatalities:
4
Circumstances:
At liftoff at Bamyan Airport, the twin engine airplane went out of control and crashed. Both pilots and two passengers were killed while 15 other occupants were injured. All passengers were US and Canadian citizens.

Crash of a Vickers 735 Viscount in Mosul

Date & Time: Apr 17, 1973
Type of aircraft:
Operator:
Registration:
YI-ACL
Survivors:
Yes
Schedule:
Baghdad - Mosul
MSN:
68
YOM:
1955
Country:
Region:
Crew on board:
6
Crew fatalities:
Pax on board:
27
Pax fatalities:
Other fatalities:
Total fatalities:
0
Aircraft flight hours:
24498
Aircraft flight cycles:
14649
Circumstances:
While descending to Mosul, the crew encountered technical problems with the fuel supply system and declared an emergency. In a certain confusion, the pilots did not follow the approach checklist and failed to lower the undercarriage. The airplane landed on its belly and slid for dozen meters before coming to rest. While all 33 occupants were evacuated safely, the aircraft was damaged beyond repair.
Probable cause:
Improper operation of the fuel system followed by failure to extend the undercarriage.

Crash of a Cessna 402A in Greensboro: 6 killed

Date & Time: Apr 13, 1973 at 2212 LT
Type of aircraft:
Operator:
Registration:
N4599Q
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Greensboro - Greensboro
MSN:
402A-099
YOM:
1969
Crew on board:
1
Crew fatalities:
Pax on board:
5
Pax fatalities:
Other fatalities:
Total fatalities:
6
Captain / Total flying hours:
10500
Captain / Total hours on type:
2000.00
Circumstances:
Shortly after takeoff from Greensboro, while engaged in a local demo flight, the twin engine airplane went out of control and crashed in flames. All six occupants were killed.
Probable cause:
Uncontrolled descent following a failure of the elevator tab control system. The following factors were reported:
- Flight control system disconnected,
- Bolt connecting aft elevator bellcrank and elevator pushrod came loose,
- 100 h ours inspection completed 66 hours prior to the accident.
Final Report:

Crash of a Rockwell Sabreliner 60 in Montrose: 2 killed

Date & Time: Apr 13, 1973 at 1635 LT
Type of aircraft:
Operator:
Registration:
N743R
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Los Angeles - Montrose - Denver
MSN:
306-11
YOM:
1968
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
2
Captain / Total flying hours:
10000
Captain / Total hours on type:
84.00
Aircraft flight hours:
2372
Circumstances:
After takeoff from Montrose Airport, while climbing to an altitude of 1,000 feet, the airplane banked left to an angle of 55° then stalled and crashed in a huge explosion. The aircraft was destroyed by impact forces and a post crash fire and both pilots were killed.
Probable cause:
Loss of control during initial climb after the left engine thrust reverser deployed. The following factors were reported:
- Improper operations of powerplant,
- The pilot-in-command failed to follow the approved procedures,
- Improper emergency procedures,
- Unwanted thrust reversal,
- Continued operations of left engine at climb power after unwanted in-flight deployment of the left engine thrust reverser.
Final Report: