- Date
- July 30, 2011, 11:00 local (18:00 UTC)
- Place
- Mulino, OR
- Injuries
- 3 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N9741ACessna 170A
- Defining event
- Landing-landing roll: Loss of control on ground
- Weather
- Visual (VMC) · Day
- Status
- Completed · report October 17, 2011
- Report
- Approved by Office Director
- NTSB office
- Western Pacific Region
- Parties
- Federal Aviation Administration
- FAA report
- 20110730015829A
- Case key
- 81295
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 certified flight instructor's inadequate oversight of his student, and delayed recovery efforts following the student's loss of directional control during landing rollout.
Findings · 4
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
The certified flight instructor (CFI) reported that the purpose of the flight was, in part, to provide the private pilot with recurrent training in furtherance of obtaining a flight review. The student was not current. Following performance of basic airwork in the conventional gear airplane, the CFI asked the student to perform a wheel landing. The CFI said that the student’s landing was successfully performed, but during rollout he exhibited a directional control deficiency. The airplane veered right during rollout on the subsequent landing, and the student attempted to regain directional control. The CFI reported that, due to his lengthy personal relationship with the student, he delayed acquiring control of the airplane. By the time he took the controls, it was too late to avoid the impending ground loop. As the airplane came to a stop on the runway’s gravel shoulder, the left main landing gear separated from the gear box, and the left wing broke.
Factual narrative
The certified flight instructor (CFI) reported that the purpose of the flight was, in part, to provide the private pilot with recurrent training in furtherance of obtaining a flight review. The student was not current. Following performance of basic airwork in the conventional gear airplane, the CFI asked the student to perform a wheel landing. The CFI said that the student’s landing was successfully performed, but during rollout he exhibited a directional control deficiency. The airplane veered right during rollout on the subsequent landing, and the student attempted to regain directional control. The CFI reported that, due to his lengthy personal relationship with the student, he delayed acquiring control of the airplane. By the time he took the controls, it was too late to avoid the impending ground loop. As the airplane came to a stop on the runway’s gravel shoulder, the left main landing gear separated from the gear box, and the left wing broke.
Aircraft
- Registration
- N9741A
- Reported as
- Cessna 170A
- Category
- Airplane
- Serial number
- 19406
- Airframe hours
- 3,771
- Engine
- Cont Motor C145 SERIES, 145 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Operator
- James Greene
- Registered owner
- Michelle A. Helzer
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · July 11, 2011 · 2 hours before
- Departed
- 7S9 · Hubbard, OR
- Destination
- 4S9 · Mulino, OR
- Airport
- 4S9 · Mulino State, runway 32, 3,425 × 100 ft, asphalt
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 · 2
As NTSB recorded them. NTSB leaves out names.
- Role
- Flight instructor
- Age
- 58
- Injuries
- None
- Certificates
- Commercial, Flight instructor
- Airplane ratings
- Single-engine land, Single-engine sea
- Instrument ratings
- Airplane
- Medical
- Class 2, With waivers/limitations
- Last flight review
- March 17, 2011
- Seat
- Right
- Flight hours
- 2,758 total · 10 in this make and model · 2,694 as pilot in command · 58 in the last 90 days
- Role
- Pilot
- Injuries
- None
- Seat
- Left
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 340° at 5 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 64 °F
Docket · 1
The files NTSB released with the investigation on September 13, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 335 KB in all.
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.