Crash of an Antonov AN-12AP near Omsukchan: 11 killed

Date & Time: Aug 9, 2011 at 1532 LT
Type of aircraft:
Operator:
Registration:
RA-11125
Flight Phase:
Flight Type:
Survivors:
No
Site:
Schedule:
Komsomolsk-on-Amur – Magadan – Keperveyem
MSN:
3 3 410 06
YOM:
1963
Flight number:
LN9209
Country:
Region:
Crew on board:
9
Crew fatalities:
Pax on board:
2
Pax fatalities:
Other fatalities:
Total fatalities:
11
Captain / Total flying hours:
15297
Captain / Total hours on type:
6263.00
Copilot / Total flying hours:
3939
Copilot / Total hours on type:
3838
Aircraft flight hours:
18709
Aircraft flight cycles:
9172
Circumstances:
The four engine aircraft departed Komsomolsk-on-Amur Airport on a cargo service (flight LN9209) to Keperveyem with an intermediate stop in Magadan, carrying 17,43 tons of various goods, two passengers and a crew of nine. The aircraft departed Komsomolsk-on-Amur Airport at 1437LT. At 1520LT, while cruising at an altitude of 7,500 metres about 430 km northeast from his departure point, the crew informed ATC about a fuel leak on the engine n°1, requested a descent to 6,600 metres then the clearance to return to Komsomolsk-on-Amur. After the engine n°1 caught fire, the crew declared an emergency and started an emergency descent. Out of control, the aircraft crashed on the slope of a mountain located about 82 km southwest from Omsukchan. The aircraft disintegrated on impact and the debris were found a day later at an altitude of 1,006 metres. All 11 occupants were killed. This Antonov AN-12 was the oldest model still in commercial service in Russia.
Probable cause:
The probable causes of the crash were:
Following the inflight shut down of engine number one and feathering of the number one propeller the longitudinal (roll) control of the aircraft was lost due to load-bearing properties of the left wing and possible damage to the left hand aileron control wiring resulting in the aircraft's uncontrolled excessive roll to the left and subsequent impact with terrain. The fire started in the tail section of the #1 engine nacelle and spread forward and onto the wing. The fire was most likely fed by fuel leaking from a fuel line connection to the low pressure fuel pump at engine #1, the fuel most likely ignited due to contact with hot engine parts. Due to the disintegration of the aircraft and fire damage it was not possible to establish the location of fuel leaks and the cause with certainty. The inability of the fire suppression system to extinguish such a fire in its early stages as well as the lack of checklists/guidelines in the aircraft's flight manual for fuel leaks inside the engine nacelle contributed to the delay of more than 2 minutes to shut the engine down. The mountainous terrain underneath the aircraft, low level overcast cloud and lack of time due to continued fire did not permit the crew to select a proper site for an emergency landing.
Final Report:

Crash of an Antonov AN-12BP in Keperveyem

Date & Time: Jul 21, 2010 at 0932 LT
Type of aircraft:
Operator:
Registration:
RA-11376
Flight Phase:
Flight Type:
Survivors:
Yes
Schedule:
Keperveem - Komsomolsk-on-Amur
MSN:
02 348 206
YOM:
1972
Flight number:
KBR9236
Country:
Region:
Crew on board:
7
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
0
Aircraft flight hours:
5136
Aircraft flight cycles:
3090
Circumstances:
During the takeoff roll on runway 27 at Keperveyem Airport, the four engine aircraft deviated to the left, went out of control and veered off runway. It lost its undercarriage and slid before coming to rest 120 metres to the left of the runway and after a course of 880 metres. All 8 occupants escaped uninjured while the aircraft was damaged beyond economical repair.
Probable cause:
Loss of control during takeoff following the failure of the nosewheel steering system due to the malfunction of the VG15-2S switch. The captain failed to check the nosewheel steering system prior to takeoff, which was considered as a contributing factor.
Final Report:

Crash of a PZL-Mielec AN-2 in Keperveyem

Date & Time: Aug 24, 1986
Type of aircraft:
Operator:
Registration:
CCCP-91748
Flight Phase:
MSN:
1G37-25
YOM:
1963
Country:
Region:
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Crashed near Keperveyem after the crew failed to follow the minimum prescribed altitude.