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Crash of a De Havilland DHC-6 Twin Otter 300 at Perris Valley

Date & Time: May 24, 2017 at 1515 LT
Operator:
Registration:
N708PV
Survivors:
Yes
Schedule:
Perris Valley - Perris Valley
MSN:
489
YOM:
1976
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
3358
Captain / Total hours on type:
2131.00
Copilot / Total flying hours:
1893
Copilot / Total hours on type:
12
Aircraft flight hours:
37885
Circumstances:
The pilot of the twin-engine, turbine-powered airplane reported that, while providing flights for skydivers throughout the day, he had a potential new hire pilot flying with him in the right seat. He added that, on the eighth flight of the day, the new pilot was flying during the approach and "approximately 200 feet south from the threshold of [runway] 15 at approximately 15 feet AGL [above ground level] the bottom violently and unexpectedly dropped out. [He] believe[d] some kind of wind shear caused the aircraft [to] slam onto [the] runway and bounce into the air at a 45 to 60-degree bank angle to the right." The prospective pilot then said, "you got it." The pilot took control of the airplane and initiated a go-around by increasing power, which aggravated the "off runway heading." The right wing contacted the ground, the airplane exited the runway to the right and impacted a fuel truck, and the right wing separated from the airplane. The impact caused the pilot to unintentionally add max power, and the airplane, with only the left engine functioning, ground looped to the right, coming to rest nose down.
Probable cause:
The prospective pilot's improper landing flare and the pilot's delayed remedial action to initiate a go-around, which resulted in a runway excursion.
Final Report:

Crash of a De Havilland DHC-6 Twin Otter 200 in Perris Valley: 16 killed

Date & Time: Apr 22, 1992 at 1109 LT
Operator:
Registration:
N141PV
Flight Phase:
Survivors:
Yes
Schedule:
Perris Valley - Perris Valley
MSN:
141
YOM:
1968
Crew on board:
2
Crew fatalities:
Pax on board:
20
Pax fatalities:
Other fatalities:
Total fatalities:
16
Captain / Total flying hours:
4300
Captain / Total hours on type:
100.00
Aircraft flight hours:
29391
Circumstances:
The ground loader had fueled the airplane from the airport fuel truck. He stated that the flight crew did not sump the fuel tanks after they were fueled. Immediately after takeoff the right engine lost power, the right wing lowered to about 90°, and the airplane impacted the ground adjacent to the runway. Then forward fuel tank, which provides fuel to the right engine, was found to contain about 8 gallons of a heavily contaminated mixture composed of water, an emulsifying agent, and bacterial growth. The fuel from the airport fuel truck and main underground tank contained the same mixture. Fuel had been transferred from the underground tank to the truck on the evening preceding the accident. The left propeller control was found seized in the feather position; left propeller blades in the near feather position. Six skydivers were injured while 16 other occupants including both pilots were killed.
Probable cause:
The pilot-in-command's inadvertent feathering of the wrong propeller following an engine power loss, and the failure of the operator to assure that the pilot was provided with adequate training in the airplane. Factors related to the accident were: water contamination of fuel in the airport storage tanks, the operator's lack of fuel quality control procedures, improper fuel servicing, improper preflight by the pilot(s), and exceeding the gross weight/forward cg limits of the airplane.
Final Report: