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YAK – Nanchang

The following are reports on Nanchang/ YAK accidents [see also Hemple for other information]:

4. USA Sunday, September 16, 2012 in Brownsboro, AL

Wed, Oct 10, 2012

NTSB Prelim Released In YAK-52 Fly-In Accident

Had Been Performing Formation Aerobatics When It Went Down, Resulting In Two Fatal Injuries

The NTSB has released a preliminary report in an accident involving a YAK-52 airplane performing formation aerobatics during a fly-in at Moontown Airport in Brownsboro, AL. The accident resulted in the fatal injury of the pilot, 74-year-old George Myers who was also the owner of the airport, and Christian Schmidtt, a 17-year-old student pilot who was also on board.

NTSB Identification: ERA12FA565
14 CFR Part 91: General Aviation
Accident occurred Sunday, September 16, 2012 in Brownsboro, AL
Aircraft: YAKOVLEV YAK 52, registration: N2207X
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 September 16, 2012, about 1515 central daylight time, an experimental, Yakovlev Yak-52, N2207X, registered to Matrushka LLC and operated by an individual, sustained substantial damaged from ground impact at Moontown Airport (3M5), Brownsboro, Alabama. The pilot and the student pilot rated passenger were fatally injured. Visual meteorological conditions prevailed at the time and no flight plan was filed for the Title 14 Code of Federal Regulations, Part 91, personal flight. The flight originated from 3M5, about 1450.

The airport was having a fly in event that day. Several witnesses observed three Yak-52 airplanes flying from west to east in a trailing formation, each slightly lower than the one in front. When they were southeast of the airport, the lead airplane performed a barrel roll, followed by the second airplane in the formation. When the third airplane performed the barrel roll, as the airplane reached the wings level attitude, the nose of the airplane was in a high pitch angle. The airplane began to descend in that nose high attitude. Then the airplane’s nose dropped below the horizon and it was lost from sight behind the trees that separated the open field and the airport’s grass runway. A loud impact noise was heard and smoke was seen immediately rising behind the trees.

The pilot, age 74, held a Federal Aviation Administration private pilot certificate with rating for airplane single engine land and airplane instrument. He was issued a second-class medical certificate on February 29, 2012, with limitations. A review of the pilot’s flight logbooks shows he documented a total time of 6,150 flight hours.

The Yakovlev Yak-52 was manufactured in the Soviet Union in 1982 and was issued a Federal Aviation Administration experimental airworthiness certificate in the exhibition category in November of 1999. The two place, low wing, metal construction airplane was powered by a 360 horsepower, Vedeneyev, M14P, 9-cylinder radial engine, and equipped with a two-bladed counter-clockwise rotating, variable pitch, wood and fiberglass laminated propeller.

The airplane’s energy path at the accident site was on an estimated 90-degree heading. The airplane’s initial collision was with the ground at an elevation of 686 feet mean sea level, which made a three foot in diameter crater that was two feet deep. One of the two wooden propeller blades was embedded into the ground at that location. The engine, along with its cowling, separated from the airframe and came to rest about 50 feet along the energy path from the crater. The propeller hub assembly remained attached to the engine minus the propeller blades. A section of the left outboard wing was located about 90 feet along the energy path from the crater. The main wreckage came to rest about 150 feet from the crater on an estimated 290-degree heading. Remnants of both wing’s flight control surfaces, engine parts, nose gear, right main gear, and canopy debris were located along the crash energy path.

The main wreckage consisted of the fuselage, wings, and empennage with its flight control surfaces. From the engine firewall to the rear cockpit area sustained thermal damage from the post impact fire that ensued. Some instrument panel components and the wing’s cross spar beam were discernible among the melted metal. The right wing was intact with impact damage to the leading edge and thermal damage near the wing root area. The left wing was separated from the wing root area and bent back to the fuselage. The left main gear remained attached to the wing. The empennage areas sustained impact damage and the fabric covered flight control surfaces had thermal damage.

(YAK-52 image from file)

FMI: www.ntsb.gov

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3. New Zealand

Screwdriver may have caused Yak crash

 

Screwdriver may have caused Yak crash

A Yak-52 aircraft (file pic)

A Yak-52 aircraft (file pic)

A screwdriver found among the wreckage may have caused a Yak-52 aircraft to crash into a Feilding park, killing the two occupants, air crash investigators say.

Civil Aviation Authority (CAA) investigators on Thursday said they were following a line of inquiry that the loose screwdriver may have become jammed somewhere and made it impossible to fly the aircraft.

It was too early to conclude that was the cause of the crash on January 23, but the screwdriver find was of grave concern, the investigators said.

“The finding mirrors an accident involving a Yak-52 aircraft in the United Kingdom in 2003, in which two people were killed. In this accident, a stubby-type screwdriver became lodged in the tail of the aircraft affecting its controls,” they said.

Pilot Ralph Saxe, 51, of Palmerston North, and passenger Brett Ireland, 50, who had been living in Queensland, were killed when the Yak-52 crashed into the sports field at Timona Park.

Dr Saxe’s funeral was held on Thursday.

The Yak-52 was reported to be doing aerobatics before it crashed, and the CAA has contacted all New Zealand Yak-52 owners about the screwdriver find, and is strongly recommending a thorough visual inspection for any foreign objects before aerobatics.

The Yak-52 was a replica of the 1970s Russian two-seater training aircraft.

The investigation into the accident is continuing and it is hoped that a preliminary report will be published within three weeks.

NZN

Read more: http://www.3news.co.nz/Screwdriver-may-have-caused-Yak-crash/tabid/423/articleID/241623/Default.aspx#ixzz2XalmvnEj

 

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2. Britain – see report

The following comment bears comparison with the Hemple example:

Post-mortem examination

A specialist aviation pathologist who carried out post‑mortem examination of both pilots found that the
crash forces were outside the range of human tolerance and that both had suffered severe multiple injuries on
impact. Whilst neither exhibited classical control‑type injuries to their hands, the instructor had suffered
ankle fractures which might indicate his feet were on the rudder pedals at impact. Toxicology results were
negative other than for caffeine.

[ YAK – 52 Britain ]

 

Report name:
YAK-52, RA-3585K
Registration:
RA-3585K
Type:
YAK-52
Location:
Langford, near Maldon, Essex
Date of occurrence:
28 April 2011
Category:
General Aviation – Fixed Wing
Summary:
During a tailchase, the aircraft entered an inverted spin at approximately 1,800 ft agl, probably because of unintentional pro-spin positioning of the flying controls. Although the spin ceased after three turns, the aircraft impacted the surface of a lake during the ensuing dive. The investigation identified several factors relevant to the accident, including operation of the aircraft, the type of flight instruments fitted to it and the manner in which the activity was conducted.

 

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1.  June 8th 2013 1 Killed in Yak-52

A Soveit-era Yak-52 and Yak-54 aircraft. (Archive)

17:14 08/06/2013
Tags: Yak-52, Ukraine

Multimedia

KYIV, June 8 (RIA Novosti) – A Soveit-era Yak-52 aircraft crashed near Ukraine’s capital of Kyiv killing at least one and injuring another on Saturday, officials said.

The Yak-52 aircraft went down while performing a pilot training flight not far from Chaika airfield in suburban Kyiv. The pilot died at the scene, while a passenger was rushed to hospital in the capital, the emergencies situation officials said in a statement.

A probe was opened into the crash. The trainer aircraft didn’t catch fire while falling. It was not immediately clear what caused the accident.

© 2013  RIA Novosti