The National Transportation Safety Board did not travel to the scene of this accident.
Additional Participating Entities:
Federal Aviation Administration / Flight Standards District Office; Scottsdale, Arizona
Aviat Aircraft Inc; Afton, Wyoming
Glasair III Investors LLC
Location: Carefree, AZ
Accident Number: WPR21LA135
Date & Time: February 18, 2021, 17:30 Local
Registration: N43LL
Aircraft: AVIAT AIRCRAFT INC A-1C-200
Injuries: 2 None
Flight Conducted Under: Part 91: General aviation - Personal
On February 18, 2021, about 1730 mountain standard time, an Aviat Aircraft Inc. A-1C-200, N43LL, sustained substantial damage when it was involved in an accident in Carefree, Arizona. The commercial pilot and passenger were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight.
The pilot stated that after an uneventful 2.9 hour cross country flight, he configured the airplane for approach to the destination airport. When the airplane was on the final approach to runway 24, he disengaged the autopilot by depressing the red disconnect button on the control stick and the nose of the airplane immediately yawed to the right. In an attempt to counteract the excessive yawing motion, the pilot applied left rudder and engaged the yaw damper on the automatic flight control system display. The pilot regained direction control and confirmed that the airplane responded normally when he applied left and right pedal applications.
The pilot further stated that he continued the approach and disengaged the yaw damper about 800-ft above ground level. With the airplane at a higher altitude than he intended, he fully extended the wing flaps and maneuvered into a cross-control slip configuration. He subsequently depressed the left rudder pedal to align the nose with the runway centerline, but despite his attempts, the left rudder input was ineffective.
The airplane touched down on the gravel surface on the left side of the runway and with the nose of the airplane to the right of the runway heading. The airplane veered to the right and crossed over the asphalt surface of runway 24. The airplane ground-looped and the left main landing gear collapsed followed by the left wing and aileron contacting the ground. The airplane came to rest in the safety area between the right side of runway 24 and the taxiway, with the nose of the airplane oriented 180° opposite the intended landing direction.
The pilot performed a post-accident inspection of the airplane. When examining the rudder system, he found that the bridal cable for the yaw servo had dislodged from the right pulley assembly on the servo tray. The cable was routed under the pulley’s laminated phenolic sheave and trapped between the servo tray and the attachment tray. Upon further examination, he noted that there was no cotter pin installed on the pulley assembly where it normally affixed between the upper pulley flange and the servo tray, designed to prohibit the cable from being able to travel out of the groove past the sheaves (see Figure 1).
Aircraft and Owner/Operator Information
Aircraft Make: AVIAT AIRCRAFT INC
Registration: N43LL
Model/Series: A-1C-200
Aircraft Category: Airplane
Amateur Built: No
Operator:
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: SDL,1510 ft msl
Observation Time: 11:53 Local
Distance from Accident Site: 12 Nautical Miles
Temperature/Dew Point: 7°C /-11°C
Lowest Cloud Condition: Clear
Wind Speed/Gusts, Direction: 4 knots / , 10°
Lowest Ceiling:
Visibility: 10 miles
Altimeter Setting: 3014 inches Hg
Type of Flight Plan Filed: None
Departure Point: Albuquerque, NM (AEG)
Destination: Carefree, AZ
Wreckage and Impact Information
Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: 1 None
Aircraft Fire: None
Ground Injuries:
Aircraft Explosion: None
Total Injuries: 2 None
Latitude, Longitude: 33.818095,-111.89792 (est)
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