N59352

HISTORY OF FLIGHT

On June 1, 2010, about 1705 Alaska daylight time, a Cessna U206F airplane, N59352, sustained substantial damage when it impacted an unoccupied building and terrain following a loss of control during the initial climb from runway 25 at the Merrill Field Airport, Anchorage, Alaska. A postcrash fire consumed much of the airplane. The airplane was being operated as a visual flight rules (VFR) cross-country personal flight under 14 Code of Federal Regulations (CFR) Part 91, when the accident occurred. The airplane was owned by Cavner & Julian, Inc., Port Alsworth, Alaska. Of the five people on board, the commercial pilot/airplane owner and three passengers sustained serious injuries. The remaining passenger, the 4-year-old child of the pilot and the right front seat passenger, died at the scene. Visual meteorological conditions prevailed, and no flight plan was filed. The flight was en route to the airplane owner’s lodge in Port Alsworth.

During on-scene interviews with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on June 1, witnesses reported that just after takeoff, the airplane was flying in a nose high, tail low attitude as it descended into the principally commercial area about 1/2 mile west of the Merrill Field Airport. One witness, who was also a pilot, commented that the airplane appeared to be “laboring” and possibly had an aft center of gravity or was very heavy. Another witness stated that the airplane was extremely nose high and tail low and was not climbing. The airplane was seen to enter a slight right turn, and then began to lose altitude before it crashed into an empty parking lot and adjacent unoccupied wood-framed single story building.

Shortly after impact, the airplane began to burn, which eventually spread to a portion of the building.

The crash site was adjacent to a major one-way north flowing roadway that serviced downtown Anchorage. Several witnesses and vehicle occupants went to the airplane to assist in removing the victims because of the imminent fire danger. Within a few minutes, law enforcement and fire department personnel arrived, put out the fire, and removed the remaining occupants.

During an interview with the pilot, he stated to the NTSB IIC that he recalled taking off and thinking that everything was okay. He remarked that he departed with 30 degrees of flaps which he said was standard for the Cessna 206. At 150 feet above the ground, he raised the flaps from 30 degrees to 20 degrees and detected “an issue” with the airplane. He said he was concerned about maintaining his airspeed and not stalling. He remembered initiating a slight right turn, and said he did not recall anything after that.

PERSONNEL INFORMATION

The pilot, age 33, held a commercial pilot certificate with airplane single engine land and sea ratings. He was issued a second class airman medical certificate without limitations on March 18, 2010.

The pilot’s flight logbook was reviewed by the NTSB. The logbook covered the period from March 24, 2007, through May 26, 2010, and indicated that he had logged 1,717.9 hours total time and 81.1 hours in a Cessna 206, all of which were in the accident airplane. The time in the Cessna 206 was between March 20, and May 26, 2010. The pilot received instruction in the Cessna 206 March 20 through 21, 2010. On March 21, 2010, he completed the requirements of a flight review, and received an endorsement for acting as pilot in command of a high performance airplane.

The NTSB IIC interviewed an aviation mechanic/pilot who had interacted and flown with the pilot. This individual stated he saw the pilot operate the airplane in what he believed was an overweight condition on four or five separate occasions. He said that this was over a 4 week period of time, and he did not know if this was standard. He also stated that he had not seen the pilot weigh any of the cargo or perform a weight and balance calculation during this period of time.

AIRCRAFT INFORMATION

The accident airplane (serial number U20603221) was manufactured in 1976 and had a standard airworthiness certificate for normal operations. A Teledyne Continental Motors IO-520-F engine rated at 285 horsepower at 2,700 rpm powered the airplane. The engine was equipped with a three-blade, McCauley propeller.

The airplane was maintained under an annual inspection program. A review of the maintenance records indicated that an annual inspection was completed on August 14, 2009, at an airframe total time of 6,888.2 hours and a tachometer time of 6,978.2 hours. On March 24, 2010, at a tachometer time of 6,998.5 hours, the landing gear floats were replaced with wheel landing gear. On April 19, 2010, at a tachometer time of 7,008.5 hours, a gravel deflector kit was installed.

An Aerocet cargo pack, supplemental type certificate STC)SA00096SE was installed on the airplane. According to a mechanic who assisted the pilot, the cargo pack was installed during the week of April 26, 2010. The mechanic stated the owner told him that he would have his “IA” [inspection authorized mechanic] conduct the updated weight and balance calculation later. No maintenance log entry or updated weight and balance calculation for the cargo pack was discovered during the investigation.

According to Aerocet Incorporated, the cargo pack weighed 35 pounds, and for weight and balance calculations, had an arm at installation of 51.0 inches, and a resultant moment of 1,785.0 pound-inches. The weight capacity of the cargo pack was 300 pounds. Aerocet provided a flight manual supplement with the cargo pack, which noted general cargo pack information, the limitations, emergency procedures, normal procedures, and performance. Specifically, this supplement stated that no more than 10 degrees of flaps should be used for takeoff for operations at weights above 3,450 pounds due to the effect of the cargo pack on climb performance. This supplement was not located in the wreckage or in the pilot operating handbook located with the wreckage.

METEOROLOGICAL INFORMATION

The closest official weather observation station was Merrill Field Airport (PAMR), Anchorage, Alaska, located 1/2 nautical mile (nm) east of the accident site. The elevation of the weather observation station was 137 feet mean sea level (msl). The routine aviation weather report (METAR) for PAMR, issued at 1653, reported, winds 200 degrees at 9 knots, visibility 10 miles, light rain, sky condition scattered at 4,000 feet, broken at 10,000 feet, temperature 15 degrees Celsius (C); dew point 7 degrees C; altimeter 29.48 inches.

WRECKAGE AND IMPACT INFORMATION

The accident site was in a parking lot adjacent to a single story, unoccupied building on the northwest corner of Ingra and 7th street in downtown Anchorage. The accident site was at an elevation of 111 feet msl and the airplane impacted on a magnetic heading of 270 degrees.

An on scene examination revealed an impact mark on the multi-story building across the street (to the east) from the main wreckage. The tail cone and tail spring of the accident airplane were found in the parking lot below this building. One power line was down adjacent to the multi-story building. The main wreckage of the airplane came to rest on a heading of west, with the right side of the airplane against a mound of earth and concrete. The main wreckage consisted of the burned remains of the right wing and fuselage, the empennage, the left wing, the engine and propeller assembly, and cargo.

The wreckage was recovered to a facility in Wasilla, Alaska, for further examination and documentation.

SURVIVAL ASPECTS

In an interview with the 16-year-old rear left seat passenger, she stated that the pilot was in the front left seat, the pilot’s wife was in the front right seat, and the four-year-old passenger was unrestrained and seated on his mother’s lap in the front right seat. The two-year-old passenger sat unrestrained on her lap in the rear left seat. The two-year-old was not sharing a seatbelt with her; he was just sitting on her lap.

Multiple witnesses to the accident came to the aid of the occupants of the accident airplane as it was burning. Photographs and witness descriptions depict several volunteers holding up the left wing while others worked to gain access to the occupants through the left forward exit. One rescuer reported that the airplane cabin was loaded from floor to ceiling, and they had to remove some of the cargo to reach the occupants.

The pilot was the first occupant pulled from the airplane, followed by the two-year-old passenger, who was handed out by the rear seat passenger. The rear seat passenger was rescued next, followed by the front right seat passenger.

The front right seat passenger was unable to hold onto the four-year-old passenger during the impact sequence. During the impact, the cargo shifted, and trapped the child between the cargo and the instrument panel. This prevented initial responders from reaching his location.

TESTS AND RESEARCH

On June 2, 2010, an investigator from the NTSB separated airplane wreckage and cargo recovered from the accident site. The occupant’s packed clothing was laid out to dry, and food and grocery items were separated from the lumber and ceramic tile.

On June 3, 2010, the NTSB IIC, two aviation safety inspectors from the FAA, and investigators from Cessna Aircraft Company, and Teledyne Continental Motors examined the sorted wreckage.

The flight controls, including aileron cables, rudder cables, and elevator cables, were continuous except where they had been cut for transportation of the wreckage. Fuel screens were clean of contamination. The fuel selector valve was in the right fuel tank position. The elevator trim was set at 25 degrees tab up trim. The flap jack screw was measured to a position consistent with 25 degrees of flaps.

The finger screen on the engine driven fuel pump had contaminants across approximately 25 percent of the scree...