Wednesday, June 30, 2021

Mooney M20F Executive 21, N9613M: Accident occurred June 27, 2021 at Cabin Creek Landing Airport (97MT), Marion, Montana

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. 

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

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Helena, Montana

Location: Marion, MT 
Accident Number: WPR21LA249
Date & Time: June 27, 2021, 11:45 Local 
Registration: N9613M
Aircraft: Mooney M20F
Injuries: 1 Minor, 1 None
Flight Conducted Under: Part 91: General aviation - Personal

On June 27, 2021, about 1119 mountain daylight time, a Mooney M20F airplane, N9613M, was substantially damaged when it was involved in an accident near Marion, Montana. The pilot was not injured and the passenger received minor injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight.

The pilot reported that he computed a takeoff performance based on a 5,000 ft field elevation, 80° F ambient temperature, and a takeoff weight of 2,740 lbs. The actual weight of the airplane at the time of departure was about 2,510 lbs. According to the pilot, the performance figures indicated a required ground run of 1,560 ft and takeoff distance of 2,395 ft to clear a 50 ft obstacle. The pilot reported that his engine run-up was normal and that he did not observe any anomalies with the engine prior to takeoff. He set the brakes and increased the throttle to full power to perform a short field takeoff. The engine rpm was climbing past 2,650 rpm when he released the brakes and the airplane began the takeoff roll. Seconds into the roll he observed the manifold pressure above 23 inches of Hg and the engine rpm beyond 2,650 rpm. The pilot stated that the takeoff roll was uneventful to this point. He subsequently rotated just before passing midfield, about 1,700 ft down the runway at 75 mph, but seconds later he noticed that the airplane had not gained speed as he had expected.

The pilot retracted the landing gear about this time in an attempt to gain speed, but once the landing gear had retracted he immediately felt that the airplane was not on a proper trajectory to clear the advancing 130 ft hill at the end of the runway. With an obstacle to his right, he chose to bank left at which time he pushed the turbo control knob to the ON position, which closed the manual wastegate and engaged the turbo. At this time, he also advanced the mixture to the full rich position and verified the propeller lever was in the full forward position. He observed a slight improvement in the airplane’s performance, but it was not as he had experienced during previous flights. The pilot immediately leveled the wings and maintained the airplane’s altitude before the airplane impacted the trees and came to rest.

According to a witness who was located near the departure end of the runway at the time of the accident, he heard the accident airplane’s power advance, but didn’t observe the airplane until it was about midfield. Seconds later, and immediately after the airplane had passed midfield, he observed it transition into a high angle of attack as the nose landing gear lifted off the runway. The main landing gear lifted off the ground about one second later and all three landing gear were then retracted. The airplane maintained a slow airspeed and high angle of attack as it overflew the departure end of the runway at a low altitude and eventually disappeared from the witness’ view. He heard the airplane impact trees about 15 seconds later. The witness reported that he did not detect any changes in engine rpm during the takeoff attempt.

The density altitude at the time of the accident was about 6,400 ft. Preliminary computations of the airplane’s takeoff performance indicated that the airplane required 2,515 ft of takeoff distance to clear a 50 ft obstacle. Further, according to the flight manual supplement for the aftermarket turbocharger system,

“When taking off from high elevation airfields, the turbocharger may be utilized to obtain 28.5” MAP at 2,700 rpm for 3 minutes during the takeoff. After full throttle is reached, push turbocharger control toward “ON” until 28.5” MAP is attained.”

The airplane’s fuselage was substantially damaged.

Aircraft and Owner/Operator Information

Aircraft Make: Mooney 
Registration: N9613M
Model/Series: M20F 
Aircraft Category: Airplane
Amateur Built: No
Operator: On file
Operating Certificate(s) Held: None
Operator Designator Code:

Meteorological Information and Flight Plan

Conditions at Accident Site: VMC 
Condition of Light: Day
Observation Facility, Elevation: KGPI,2973 ft msl 
Observation Time: 11:55 Local
Distance from Accident Site: 21 Nautical Miles
Temperature/Dew Point: 29°C /14°C
Lowest Cloud Condition: Clear 
Wind Speed/Gusts, Direction: / ,
Lowest Ceiling: None 
Visibility: 10 miles
Altimeter Setting: 30.22 inches Hg 
Type of Flight Plan Filed: None
Departure Point: Marion, MT 
Destination: Kalispell, MT (S27)

Wreckage and Impact Information

Crew Injuries: 1 None 
Aircraft Damage: Substantial
Passenger Injuries: 1 Minor 
Aircraft Fire: None
Ground Injuries: 
Aircraft Explosion: None
Total Injuries: 1 Minor, 1 None 
Latitude, Longitude: 48.083111,-114.67182 

MISSOULA — Two people walked away from a plane crash that occurred during takeoff Sunday morning near Marion.

Flathead County Sheriff Brian Heino says law enforcement received news of a downed aircraft at the Cabin Creek Landing Airstrip at 11:21 a.m.

Sheriff Heino said the Mooney M 205 Aircraft hit a power line on takeoff and crash-landed into nearby trees.

He said the two people on board the aircraft walked away with minor injuries.

The Marion Fire Department responded on scene along with the Flathead County Sheriff’s Office.

Sheriff Heino said the plane is registered out of Oregon.

National Transportation Safety Board officials are investigating the crash.

No comments:

Post a Comment