- Date
- June 6, 2016, 12:00 local (19:00 UTC)
- Place
- Arlington, WA
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N539MTCessna 172
- Defining event
- Landing-landing roll: Landing gear collapse
- Weather
- Visual (VMC) · Day
- Status
- Completed · report May 15, 2017
- Report
- Approved by Office Director
- NTSB office
- General Aviation Accidents
- Parties
- FAA
- Case key
- 93333
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The failure of the airplane’s right steering rod end, which resulted in the pilot’s inability to maintain directional control.
Findings · 3
NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.
Sequence of events
The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.
Analysis
According to the pilot of the tricycle landing gear-equipped airplane, he made a normal landing, but the airplane began to veer left of the centerline during the landing roll. He corrected with right rudder and heard a "thump" as if something affixed to the airplane was being dragged, and the rudder steering became ineffective. He recalled that, with constant hard right rudder input, coupled with dynamic braking, he turned the airplane to the right, the nose landing gear collapsed, and the airplane skidded to a stop. The airplane sustained substantial damage to the firewall. Photographs provided by the Federal Aviation Administration inspector revealed that the right steering rod end had failed and that the bolts of the nose gear firewall mount were pulled from the firewall. The nose gear assembly had rotated more than 90° to the left and was found underneath the fuselage. The NTSB investigator-in-charge asked that the two additional airplanes in the operator's inventory be inspected. The operator found that the steering rod ends of the inspected airplanes were bent and showed signs of cracking between the threads. The steering bungees were visually inspected; however, they could not be thoroughly inspected without damaging the component.
Factual narrative
According to the pilot of the tri-cycle landing gear-equipped airplane, he made a normal landing, but the airplane began to veer left of the centerline during the landing roll. He corrected with right rudder and heard a "thump" as if something affixed to the airplane was being dragged and the rudder steering became ineffective. He recalled that with constant hard right rudder input, coupled with dynamic braking, he turned the airplane to the right, the nose landing gear collapsed, and the airplane skidded to a stop. The airplane sustained substantial damage to the firewall. The photographs provided by the Federal Aviation Administration (FAA) Inspector revealed that the right steering rod end had failed. Photographs also revealed that the bolts of the nose gear firewall mount were pulled from the firewall. The nose gear assembly had rotated more than 90° to the left and was found underneath the fuselage. The NTSB Investigator-in-charge asked that the two additional airplanes in the operator's inventory be inspected. The operator found that the steering rod ends of the inspected airplanes, were bent and showed signs of cracking between the threads. The steering bungees were visually inspected; however, they could not be thoroughly inspected without damaging the component.
Aircraft
- Registration
- N539MT
- Reported as
- Cessna 172 (D)
- Category
- Airplane
- Serial number
- 17249604
- Built
- 1962
- Airframe hours
- 4,741.4
- Engine
- Lycoming O-360-A4M, 180 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Mission Aviation Training Academy
- Registered owner
- Mission Aviation Training Academy
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · June 10, 2015
- Departed
- W33 · Friday Harbor, WA
- Destination
- AWO · Arlington, WA
- Airport
- AWO · Arlington Muni, runway 34, 5,332 × 100 ft, asphalt
- Equipment
- Electronic flight bag or handheld device, Stall warning system
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 54
- Injuries
- None
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, With waivers/limitations
- Last flight review
- June 24, 2015
- Seat
- Left
- Restraint
- 3-point
- Flight hours
- 283 total · 175 in this make and model · 214 as pilot in command · 17 in the last 90 days · 6 in the last 30 days · 3 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 330° at 10 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 75 °F, dew point 54 °F
- Altimeter
- 29.94 inHg
- Observed at
- KAWO
Docket · 3
The files NTSB released with the investigation on April 11, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.0 MB in all.