Wednesday, January 4, 2017

Mooney M20K 231, N1159G: Accident occurred January 04, 2017 near A.L. Mangham Jr. Regional Airport (KOCH), Nacogdoches County, Texas

Aviation Accident Final Report - National Transportation Safety Board: https://app.ntsb.gov/pdf

Investigation Docket - National Transportation Safety Board: https://dms.ntsb.gov/pubdms

Aviation Accident Data Summary - National Transportation Safety Board: https://app.ntsb.gov/pdf 

The National Transportation Safety Board did not travel to the scene of this accident.

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Houston, Texas

http://registry.faa.gov/N1159G


NTSB Identification: CEN17LA068
14 CFR Part 91: General Aviation
Accident occurred Wednesday, January 04, 2017 in Nacogdoches, TX
Probable Cause Approval Date: 06/14/2017
Aircraft: MOONEY AIRCRAFT CORP. M20, registration: N1159G
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 private pilot was conducting a cross-country personal flight. He reported that he entered the downwind pattern at his home airfield and prepared the airplane to land using the manufacturer's checklist, which included selecting the fullest fuel tank, setting flaps to 5°, and lowering the landing gear. While on an extended downwind leg, the pilot noticed that the airplane had descended to between 700 and 800 ft above ground level, so he added engine power to climb back to pattern altitude, but the engine stopped producing power. The pilot turned the airplane toward the runway, which he estimated was more than 1.5 miles away. He realized that he was not going to be able to glide the configured airplane to the runway, so he performed a forced landing to a field but landed short in a wooded area. 

Examination and testing of the engine did not reveal any anomalies that would have precluded normal operation. Maintenance had recently been conducted on the fuel selector’s union fitting. The mechanic who conducted the maintenance reported purging the lines of air and conducting a successful postmaintenance test flight before releasing the airplane to the pilot. The reason for the loss of engine power could not be determined.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
The loss of engine power for reasons that could not be determined because postaccident examination and testing of the engine did not reveal any anomalies that would have precluded normal operation.

On January 4, 2017, about 1545 central standard time, a Mooney M20K airplane, N1159G, conducted a forced landing near Nacogdoches, Texas. The private rated pilot sustained minor injuries and 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. Visual meteorological conditions prevailed for the flight, which operated without a flight plan. The flight departed the Kerrville Municipal Airport and was about to land at the A L Mangham Jr Regional Airport (OCH), Nacogdoches, Texas.

The airplane had recently undergone an annual inspection and the flight was the second flight since the inspection. The pilot reported that the preflight and flight was uneventful until he entered the pattern to land at OCH. The pilot prepared the airplane to land using the manufacturer's checklist, which included changing to the fullest fuel tank, which was the left fuel tank, setting flaps to 5° and lowering the landing gear. While on an extended downwind leg, the pilot noticed that his altitude dropped to 700 to 800 ft above ground level, so he added engine power to climb back to pattern altitude. The airplane's engine stopped producing power without any vibrations or sputtering. The pilot turned the airplane towards the runway and estimated the distance to be more than 1.5 miles from the end of the runway. He set up best glide but perceived that the airplane was descending too quickly to make the runway. The pilot performed a forced landing to a field but landed short in a wooded area.

The airplane was moved to a secure location and several engine runs were conducted. Testing included scenarios with the fuel lines not purged of air. Engine runs with the left fuel line not purged of air, the engine would stop producing power if the pilot did not intervene and either activate the boost pump or switch back to the right tank. Testing found that when purged of air, the engine operated normally. Examination of the airframe found no anomalies. Examination of the fuel selector found no anomalies and each switch position was easily discerned.

The mechanic, who has worked on Mooney airplanes for 48 years, provided a statement concerning the work performed on the airplane prior to the accident. During N1159G's annual inspection, a discrepancy found were numerous fuel stains throughout the belly panels. The source of the leak was determined to be the o-rings on fittings in the fuel selector valve. The mechanic was familiar with the fuel selector valve and suspected that the o-rings were deteriorated. To perform the required replacement, both fuel tanks were drained and the fuel selector valve was removed from the airplane. The fuel selector was not disassembled and the four unions were removed. The O-rings were replaced and the fittings were torqued. The selector valve was reinstalled and the fuel tanks were refilled with the fuel that had been previously removed and filtered. The fuel selector was moved from the off position to the left position and the fuel supply to the valve was purged of air thru the gascolator drain valve. The selector was then moved to the right position and the right fuel line to the selector was purged of air thru the gascolator drain valve. Inspection showed no leaks and after several days was re-examined and found not leaking. The annual inspection and repairs were completed. The mechanic, who is also a pilot, performed a post maintenance flight that included selecting both the left and right tanks during the preflight, taxi, and flight portions. He did not detect any leaks during the post flight inspection.

The pilot has owned N1159G for almost 25 years and has at least 941 hours in the airplane without a similar incident occurring.

NTSB Identification: CEN17LA068
14 CFR Part 91: General Aviation
Accident occurred Wednesday, January 04, 2017 in Nacogdoches, TX
Aircraft: MOONEY AIRCRAFT CORP. M20, registration: N1159G
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 January 4, 2017, about 1545 central standard time, a Mooney M20K airplane, N1159G, conducted a forced landing near Nacogdoches, Texas. The private rated pilot sustained minor injuries and 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. Visual meteorological conditions prevailed for the flight, which operated without a flight plan. The flight departed the Kerrville Municipal Airport and was about to land at the A L Mangham Jr Regional Airport (OCH), Nacogdoches, Texas.

According to preliminary information, the airplane had recently undergone an annual inspection and the flight was the first flight since the inspection. While in the pattern to land at OCH, the pilot switched fuel tanks and the engine stopped producing power. The pilot performed a forced landing; however, the airplane sustained substantial damage to the wings during the landing.


The airplane was retained for further examination.




Nacogdoches County, Texas --  An East Texas pilot was able to walk away from a Nacogdoches County crash site with no injuries.

According to officials, the plane went down around 4:00 p.m. Wednesday, near Terry Crawford Road. The crash site is located off Highway 7 near the A.L. Mangham Jr. Regional Airport.

The plane, identified as an Mooney M20K 231, is registered to Donald Keith Irby of Cushing.

Officials say Irby began to have engine failure before gliding into the field. He was not seriously injured in the crash.

According to the pilot, he had flown from Nacogdoches to Longview to get his yearly inspection. On the way back, Irby stated he had engine failure close the airport. The pilot said he was able to put the plane down safely in a field which had recently been clear cut. 

Irby said despite the scary incident, he will continue to fly, but he will need to replace his now totaled aircraft.

No other passengers were on board the plane.

The FAA is investigating the accident.


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









NACOGDOCHES COUNTY, TX (KTRE) -  A plane has crashed in the area of State Highway 7 in Nacogdoches County.

According to DPS spokeswoman Stephanie Davis, the crash occurred in a wooded area near Terry Crawford Road around 4 p.m.

Donald Keith Irby, 63, of Sugarland, said he had picked up his plane in Longview after having it inspected. He was on his way to the Nacogdoches County airport when his engine began cutting out and he knew he had to find a safe landing spot and landed it in a clearing of dead trees.

Irby, who owns a ranch in Cushing, said he has some pain to his legs but, other than that, is fine.

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

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