- Date
- June 13, 2010, 19:30 local (Jun 14, 2010, 01:30 UTC)
- Place
- Blackfoot, ID
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N9357KCessna 188B
- Defining event
- Landing-landing roll: Loss of control on ground
- Weather
- Visual (VMC) · Day
- Status
- Completed · report October 21, 2010
- Report
- Approved by Office Director
- NTSB office
- Western Pacific Region
- Parties
- Federal Aviation Administration
- FAA report
- 20100613035709A
- Case key
- 76318
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
A loss of directional control during the landing roll as a result of a worn tail wheel locking mechanism.
Findings · 2
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 pilot stated that he was returning from an aerial application practice flight, in a tailwheel-equipped airplane, to practice wheel only touch-and-go takeoffs and landings. The first four landings were uneventful. During the fifth and final landing, the airplane touched down and bounced approximately one foot into the air. The airplane stabilized and the main wheels touched down for a second time. As the tail wheel touched down approximately two-thirds down the runway, it started to shimmy “violently” and the airplane veered to the left. The pilot corrected the airplane back to the right. The intensity of the shimmy increased and despite the pilot’s control inputs, the airplane exited the right side of the runway and ground looped. The airplane’s left wing was substantially damaged. Post-accident examination of the tail wheel assembly revealed wear on the locking mechanism. Additionally, “snake-like” skid marks were found on the runway that appeared to be the result of a tail wheel shimmy.
Factual narrative
The pilot stated he was returning from an aerial application practice flight, in a tail wheel-equipped airplane, to practice wheel only touch-and-go takeoffs and landings. The first four landings were uneventful. During the fifth and final landing, the airplane touched down and bounced approximately one foot into the air. The airplane stabilized and the main wheels touched down for a second time. As the tail wheel touched down approximately two-thirds down the runway, it started to shimmy “violently” and the airplane veered to the left. The pilot corrected the airplane back to the right. The intensity of the shimmy increased and despite the pilot’s control inputs, the airplane exited the right side of the runway and ground looped. The airplane’s left wing was substantially damaged. Post-accident examination of the tail wheel assembly revealed wear on the locking mechanism. Additionally, “snake-like” skid marks were found on the runway that appeared to be the result of a tail wheel shimmy.
Aircraft
- Registration
- N9357K
- Reported as
- Cessna 188B
- Category
- Airplane
- Serial number
- 18803937T
- Engine
- Continental IO-520, 300 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Vector Disease Control Inc
- Registered owner
- Vector Disease Control Inc
- Airworthiness certificate
- Special, Restricted (Special)
- Departed
- KU02 · Blackfoot, ID
- Destination
- KU02 · Blackfoot, ID
- Airport
- KU02 · McCarley Field Airport, runway 19, 4,314 × 75 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
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 49
- Injuries
- None
- Certificates
- Flight instructor, Commercial
- Airplane ratings
- Single-engine land, Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 2, With waivers/limitations
- Last flight review
- May 18, 2010
- Seat
- Center
- Flight hours
- 5,170 total · 1 in this make and model · 4,899 as pilot in command · 60 in the last 90 days · 35 in the last 30 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 170° at 4 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- 9,500 ft broken
- Temperature
- 64 °F, dew point 41 °F
- Altimeter
- 30.12 inHg
- Observed at
- PIH, 24 nm away
Docket · 1
The files NTSB released with the investigation on July 14, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 523 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.