Friday, April 15, 2016

Grumman American AA-5A Cheetah, N9684U: Fatal accident occurred August 09, 2015 in Harrisburg, Saline County, Illinois

Dr. Erich Snyder

Tommy Snyder

Grumman American AA-5A Cheetah (N9684U)


POPE COUNTY -- First responders call a fatal plane crash in Pope County last year a tragic accident, as new details surface about what caused it. 

That plane crash in Burden Falls near Harrisburg on August 9, 2015 killed a father and son from Carterville.

"When I got to the scene, I looked straight up and you could tell where that plane just fell," said Pope County Sheriff Jerry Suits, who led the search for the plane wreckage.

According to Suits, hundreds of police and volunteers helped search for the crash site last August. They had hoped for a different ending.

"Every time I go by Burden falls now, I think about that plane. It was tough for us," Suits said.

Nine months after the crash killed Erich and Tommy Snyder of Carterville, Suits still keeps the voicemail from a fellow officer that first alerted him the discovery of the wreckage.

"It was devastating to this community and it was devastating to me," Suits said.

A new report from the National Transportation Safety Board shows as the Snyder family attempted to fly from Marion, Kentucky to Marion, Illinois they faced poor weather conditions making it impossible to see.

The pair crashed into the Shawnee National Forest, more than 20 miles from their destination.

"Visibility was only five miles with mist and there was also no moon," said Mike Robertson, a Southern Illinois University aviation expert.

He examined the accident report and believes human error caused the crash. The report shows no mechanical problems with the plane, but the pilot had just 30 hours of flight experience, something Robertson fears may not have included night practice.

"The biggest factor was that it was dark. He lost visual reference with the horizon which basically tells you where you are," Robertson said.

The devastating crash scene, which witnesses describe as crumpled metal spanning hundreds of yards, left an image many in Pope County will remember for years to come.

"We're coming up here now seven, eight, nine months and I'm hoping the family got some closure," Suits said.

The pilot's log book could not be recovered in this investigation, which makes it difficult to determine what previous flying experience he had, experts say. The Snyders did not file a flight plan with any airport.

According to Robertson, pilots aren't legally required to do that but he calls it an important safety measure that guarantees a search and rescue effort should the need arise.

Story and video:  http://www.wsiltv.com

Docket And Docket Items: http://dms.ntsb.gov 

Erich J. Snyder: http://registry.faa.gov/N9684U

FAA  Flight Standards District Office:  FAA Springfield FSDO-19

NTSB Identification: CEN15FA347
14 CFR Part 91: General Aviation
Accident occurred Sunday, August 09, 2015 in Harrisburg, IL
Aircraft: GRUMMAN AMERICAN AVN. CORP. AA 5A, registration: N9684U
Injuries: 2 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

HISTORY OF FLIGHT

On August 9, 2015, about 2050 central daylight time, a Grumman AA-5A airplane, N9684U, impacted terrain in the Shawnee National Forest near Harrisburg, Illinois. The student pilot and passenger were fatally injured. The airplane was substantially damaged. The airplane was registered to and operated by a private individual under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Dark night visual meteorological conditions prevailed for the route of flight, and no flight plan was filed. The flight originated from the Marion-Crittenden County Airport (5M9), Marion, Kentucky, about 2030, and was en route to the Williamson County Regional Airport (KMWA), Marion, Illinois.

The pilot was not on a flight plan and was not in radio contact with any air traffic control center. An unconfirmed message from the pilot to his spouse about 2045 reported that the pilot was going to return to the airport; presumably 5M9. The airplane was located on August 10 in a heavily wooded area of the Shawnee National Forest.

A search of radar facilities did not find any primary or secondary radar targets consistent with the accident airplane. The airplane's exact route of flight could not be determined.

PERSONNEL INFORMATION

The pilot, age 36, held a combined student pilot and second class medical certificate issued on May 21, 2015. At the time of his application for the medical certificate, the pilot reported logging 30 hours of total time with 20 hours accumulated in the preceding six months.

The pilot's log book was not recovered during the course of the investigation, and the pilot's total experience could not be determined. It could not be determined if the pilot had received recent flight instruction and if he possessed a current solo endorsement. The amount of experience he had flying at night could not be determined.

The passenger was not pilot rated and the student pilot was not authorized to fly with passengers.

AIRCRAFT INFORMATION

The accident airplane was a Grumman AA-5A, serial number AA5A-0050, manufactured in 1975. It was powered by a 150-horsepower, normally aspirated, Lycoming O-320-E2G engine which drove a metal, 2-bladed, fixed-pitch, McCauley 1C172/BTM7359 propeller. The airplane's logbooks were not recovered and the airplane's maintenance history was not established. A September 7, 2013 auction listing for the airplane on an internet page, reported the engine hours at 7,578 hours, which also appeared in an included interior photo of the airplane's instrument panel.

METEOROLOGICAL INFORMATION

A review of weather information revealed that at 1900 a low pressure system was over western Illinois with an associated frontal wave. A warm stationary front was in the immediate vicinity of the accident site which had the potential to form a partially cloudy sky. The closest weather reporting facility was the Harrisburg-Raleigh Airport (HSB), Harrisburg, Illinois, located about 15 nautical miles north of the accident site at an elevation of 398 feet mean sea level (msl). At 2035 the weather reporting facility at HSB reported wind from 070° at 3 knots, visibility 5 miles in mist, a clear sky, temperature 77° F, dew point 77° F, and a barometric pressure of 29.91 inches of mercury.

Data from the Geostationary Operational Environmental Satellite (GOES) 13 system found that at 2035, the accident site was located in an area ahead of a large mesoscale convective system (MCS). The National Oceanic and Atmospheric Administration (NOAA) National Severe Storms Laboratory defines a MCS as "a collection of thunderstorms that act as a system. An MCS can spread across an entire state and last more than 12 hours." Astronomical Conditions for the accident site found that the moon had set at 1648 and was below the horizon at the time of the accident.

There is no evidence of the pilot receiving a weather briefing prior to the flight.

WRECKAGE AND IMPACT INFORMATION

At the beginning of the debris path, several broken and downed trees tops were found with airplane wing parts suspended in the trees and on the ground. About 55 yards from the start of the tree strikes, generally aligned along a 320° magnetic heading, was an impact point that was about 2.5 feet deep. The main wreckage had come to rest partially outside of the impact point. The debris field continued another 25 yards through the trees. Impact signatures were consistent with the airplane impacting the ground at least 25° nose low.

Portions of the right wing were found near the tree strikes with left wing components found next when walking towards the impact crater. The engine and propeller were found at the bottom of the impact crater with the fuselage and empennage resting on top of the engine. Both wings were fragmented in multiple locations. When reconstructed, all flight controls were accounted for without any evidence of preimpact damage. The engine was removed from the fuselage and examined down to its crankshaft. No preimpact anomalies were detected with the engine. The propeller remained attached the engine at the propeller flange. One blade was curled rearward and displayed chordwise scratches, gouges, and leading edge polishing. The other blade remained straight with light leading edge polishing. No preimpact anomalies were detected with the airframe or engine.

A majority of the cockpit instrumentation was destroyed by impact force. The ignition switch was in the both position. The turn and slip indicator displayed a 45° right bank. The altimeter's Kollmans window displayed 29.92. The emergency location transmitter (ELT) was found separated from the airplane and the switch was found in the OFF position. Soil was deposited in the area surrounding the switch and its preimpact position could not be determined.

MEDICAL AND PATHOLOGICAL INFORMATION

Although requested, the Pope County Coroner's Office did not perform an autopsy on the pilot, as the office deemed it not necessary due to the high velocity nature of the airplane crash.

A few milliliters of blood were recovered by the Country Coroner's Office. The entire sample was sent to the Federal Aviation Administration (FAA) Civil Aerospace Medical Institute (CAMI) for toxicology. The sample was marked putrefied. Testing detected 29 mg/dL of ethanol.
     








NTSB Identification: CEN15FA347
14 CFR Part 91: General Aviation
Accident occurred Sunday, August 09, 2015 in Harrisburg, IL
Aircraft: GRUMMAN AMERICAN AVN. CORP. AA 5A, registration: N9684U
Injuries: 2 Fatal.

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 either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

On August 9, 2015, about 2050 central daylight time, a Grumman AA-5A airplane, N9684U, impacted terrain in the Shawnee National Forest near Harrisburg, Illinois. The student pilot and passenger were fatally injured. The airplane was substantially damaged. The airplane was registered to and operated by a private individual under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Dark night visual meteorological conditions prevailed for the route of flight, and no flight plan was filed. The flight originated from the Marion-Crittenden County Airport (5M9), Marion, Kentucky, about 2030, and was en route to the Williamson County Regional Airport (KMWA), Marion, Illinois.

The airplane was located on August 10 in a heavily wooded area of the Shawnee National Forest. At the beginning of the debris path, several broken and downed trees tops were found with airplane wing parts suspended in the trees and on the ground. About 55 yards from the start of the tree strikes was an impact point that was about 2.5 feet deep. Near the impact point was the main wreckage. The debris field was aligned with a 320° magnetic heading and continued another 25 yards.

The airplane was retained for further examination.

At 2055, an automated weather reporting facility located at KMWA, about 20 nautical miles northwest of the accident site reported a wind from 210° at 3 knots, visibility 10 miles, a broken ceiling at 8,000 feet, temperature 81° F, dew point 77° F, and barometric pressure of 29.92 inches of mercury. It listed a remark for lightning to the distant west and northwest of the station.

No comments: