- Date
- August 19, 2005, 19:00 local (Aug 20, 2005, 00:00 UTC)
- Place
- Boscobel, WI
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N425AHPiper PA-12
- Weather
- Visual (VMC) · Day
- Status
- Completed · report October 27, 2005
- Report
- Approved by Office Director
- Parties
- Milwaukee, WI, FSDO
- FAA report
- 20050819024229A
- Case key
- 62363
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 separation of the right main landing gear attachment bracket bolt during the landing and the pilot's aircraft control not possible with the collapsed gear.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The tailwheel airplane piloted by a certified flight instructor, sustained substantial damage on impact with terrain when the right main landing gear broke during the landing. The flight instructor stated, "After landing on the hard surface of runway 20, the airplane started a mild left turn towards the grass on the side of the runway. A bolt had broken on the right main gear attach bracket. The right gear folded under the airplane at about 15 mph. The gear broke and pushed the plane up in the air about 5 feet and then fell. The prop stuck in the ground. The wing bent outboard. No injuries."
Factual narrative
On August 19, 2005, about 1900 central daylight time, a Piper PA-12, N425AH, piloted by a certified flight instructor, sustained substantial damage on impact with terrain when the right main landing gear broke during a landing on runway 20 at the Boscobel Airport, near Boscobel, Wisconsin. The instructional flight was operating under 14 Code of Federal Regulations Part 91. Visual meteorological conditions prevailed at the time of the accident. No flight plan was on file. The pilot reported that he and his student were uninjured. The local flight was originating at the time of the accident.
The flight instructor's accident report stated:
I was giving dual instruction to a private pilot for the
purpose of a tailwheel endorsement. After landing on
the hard surface of runway 20, the airplane started a
mild left turn towards the grass on the side of the
runway. A bolt had broken on the right main gear attach
bracket. The right gear folded under the airplane at
about 15 mph. The gear broke and pushed the plane up in
the air about 5 feet and then fell. The prop stuck in
the ground. The wing bent outboard. No injuries.
Aircraft
- Registration
- N425AH
- Reported as
- Piper PA-12
- Category
- Airplane
- Serial number
- 12-817
- Airframe hours
- 1,775
- Engine
- Lycoming O-235-C1, 108 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Registered owner
- Ronald V. Huls
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · August 1, 2005 · 1 hours before
- Departed
- OVS · Boscobel, WI
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
- Flight instructor
- Age
- 72
- Injuries
- None
- Certificate
- Commercial
- Airplane ratings
- Multi-engine land, Single-engine sea, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 2, Without waivers/limitations
- Last flight review
- October 1, 2004
- Flight hours
- 19,300 total · 200 in this make and model
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 0° at 0 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 82 °F, dew point 70 °F
- Altimeter
- 29.86 inHg
- Observed at
- OVS
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.