Aviation Accident Final Report - National Transportation Safety Board: http://app.ntsb.gov/pdf
Docket And Docket Items - National Transportation Safety Board: http://dms.ntsb.gov/pubdms
Aviation Accident Data Summary - National Transportation Safety Board: http://app.ntsb.gov/pdf
2576E LLC: http://registry.faa.gov/N2576E
FAA Flight Standards District Office: FAA Denver FSDO-03
14 CFR Part 91: General Aviation
Accident occurred Saturday, July 16, 2016 in Longmont, CO
Probable Cause Approval Date: 12/12/2016
Aircraft: AERONCA 7BCM, registration: N2576E
Injuries: 1 Minor.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
The commercial pilot was taking off in the light sport aircraft for a local personal flight. The pilot reported that, while attempting to take off from the 4,799-ft-long runway, he noticed a lower-than-normal engine rpm and that the takeoff roll was significantly longer. Despite the extended takeoff roll and low engine rpm, the pilot chose to continue the takeoff. The airplane lifted off and slowly climbed to about 200 ft above ground level. Due to concerns about rising terrain, the pilot chose to make a forced landing, during which the airplane hit power lines. The airplane then skipped across a road and nosed over.
Examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures. Carburetor icing was likely not a factor given the environmental conditions at the time of the accident and the pilot’s report of a short taxi time.
The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
The pilot's decision to continue the takeoff after observing a partial loss of engine power, the reason for which could not be determined because postaccident examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures.
On July 16, 2016, about 1020 mountain daylight time, an Aeronca 7BCM airplane, N2576E, impacted terrain while departing from Vance Brand Airport (LMO), Longmont, Colorado. The pilot sustained minor injuries and the airplane was substantially damaged. The airplane was registered to and operated by 2576E LLC under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Day visual meteorological conditions existed at the time of the accident and no flight plan had been filed. The local flight was departing at the time of the accident.
On the day prior to the accident, the pilot serviced the airplane with 10 gallons of aviation fuel for a total fuel onboard of 13 gallons. The pilot stated that the elapsed time from engine start to takeoff roll was less than 5 minutes. While performing an engine runup at 1,700 rpm, he checked the carburetor heat and magnetos, which he reported as normal. He recalled the wind conditions as calm.
During takeoff roll from Runway 29, the pilot observed the engine was only producing about 2,000 rpm, versus the 2,200 rpm he typically noticed. He continued the takeoff and observed a significantly longer takeoff roll. After liftoff, the airplane was unable to climb normally and after reaching about 200 ft agl, the pilot executed a forced landing due to concerns with terrain. During the forced landing, the airplane hit power lines, skipped across a road and nosed over, which damaged both wings.
A pilot witness near the departure end of the runway noticed the airplane liftoff much later than he expected, about 3,000 ft down the 4,799 ft long runway. After liftoff, he noticed the airplane climb slowly to about 200 ft and then bank left and descend out of sight. During the takeoff, the witness observed the windsock indicating a tailwind of 3 or 4 knots.
At 1014, the weather observation station at LMO reported the following conditions: wind calm, visibility 7 miles, clear skies, temperature 24 degrees C, dew point 14 degrees C, and altimeter setting 29.98 inches of mercury. At 1034, the conditions were wind 100 degrees at 4 knots. Density altitude was calculated to be 7,388 ft. The Federal Aviation Administration (FAA) icing probability chart indicated there was potential for serious carburetor icing at glide power at the time of the accident.
FAA inspectors examined the airplane and determined the fuel from the main tank had leaked out while the airplane was inverted after the accident. The gascolator contained about 2 ounces of fuel, which was clear and bright, with no water or debris. No anomalies were noted with the ignition or carburetor systems. Compression testing of the cylinders was accomplished, with normal results. Examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.
NTSB Identification: CEN16LA267
14 CFR Part 91: General Aviation
Accident occurred Saturday, July 16, 2016 in Longmont, CO
Aircraft: AERONCA 7BCM, registration: N2576E
Injuries: 1 Minor.
This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
On July 16, 2016, about 1020 mountain daylight time, an Aeronca 7CBM airplane, N2576E, impacted terrain while departing from Vance Brand Airport (LMO), Longmont, Colorado. The pilot suffered minor injuries and the airplane was substantially damaged. The airplane was registered to and operated by 2576E LLC under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Day visual meteorological conditions existed at the time of the accident. The local flight departed without a flight plan.
Shortly after departing from Runway 29, the pilot noticed the engine was only producing 2,000 rpm, versus the 2,200 rpm he typically noticed. The pilot was unable to climb normally and executed a forced landing, during which the airplane hit power lines, skipped across a road, and nosed over.
"We're trained to fly the airplane to the site of the crash," Shenk said. As the plane started going down, Shenk was able to maneuver it over traffic and under power lines before crashing west of 75th street in a ditch between two open fields. Shenk was the only person in the plane and walked away from the crash with only a few minor scratches on his wrists.
The Longmont Police Department, along with the Longmont Fire Department, responded to the scene to treat and release Shenk after he was evaluated. The National Transportation Safety Board (NTSB) and Federal Aviation Administration (FAA) are continuing to investigate the cause of the crash.
The pilot of the crashed plane talks on the phone along 75th Street. A small plane went down just west of Vance Brand Airport in Longmont today. The pilot was able to walk away.
LONGMONT, Colo. — A pilot suffered minor injuries after his single-engine plane crashed shortly after takeoff Saturday morning near Longmont.
The 1946 Aeronca Champ piloted by 75-year-old David Shenk of Longmont suddenly lost power around 10:51 a.m., the Boulder County Sheriff’s Office said.
Shenk maneuvered the plane between cars and power lines on N. 75th Street, coming to rest nose-down in a field.
Shenk was able to get out of the plane on his own. He was treated for his injuries at the scene and released.
The NTSB and FAA will investigate the crash. The plane will remain in the field until the investigation is complete.
Source: http://kwgn.com
A Longmont pilot crashed his single-engine airplane in a field west of N. 75th Street this morning, though he managed to escape the wreck with only minor injuries.
The pilot was the only person aboard the plane at the time of the 10:15 a.m. crash, according to a news release from the Boulder County Sheriff's Office. The cause of the crash is unknown.
David Shenk, 74, was taking off from Longmont's Vance Brand Airport, when the engine of his 1946 Aeronca Champ lost power. Unable to climb, Shenk was forced to navigate the aircraft through traffic on N. 75th Street, passing between nearby power lines before crashing in a field some 20 yards west of the roadway.
Sheriff's deputies, as well as Longmont Police and Fire, responded to the crash. Shenk had been able to exit the plane, and was waiting for emergency personnel when they arrived. He suffered only minor injuries to his lower arms, and was released after an evaluation, Boulder Sheriff's Cmdr. Mike Wagner said.
The plane, based out of Vance Brand, came to rest on its nose and was slightly inverted. The crash ended its first flight of the day. Shenk intended to fly locally, ending at Erie Municipal Airport.
The crash is being investigated by the National Transportation Safety Board and the Federal Aviation Administration. The plane will remain at the scene of the crash until the on-site investigation is complete.
Source: http://www.dailycamera.com
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