# Accident 20170909017729A: Aviat Aircraft Inc A-1B, Prairie Du Chie, WI, September 9, 2017

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: September 9, 2017, 15:45 local time
- Place: Prairie Du Chie, WI
- Airport: Prairie Du Chien Municipal
- Damage: Minor damage
- Phase of flight: Cruise/Level Flight
- Operating rules: General operating rules (Part 91)
- Location: 43.0219° N, 91.1244° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=43.0219&lon=-91.1244&mi=10
- Aircraft: N299CA, registered now (https://openairdocs.org/aircraft/N299CA) (OpenAirDocs)
- Registry model: Aviat A-1B (registry code 2210406, https://openairdocs.org/model/aviat-a-1b) (OpenAirDocs)
- Registry engine: Lycoming O-360 series (registry code 41575, https://openairdocs.org/engine/lycoming-o-360-series) (OpenAirDocs)
- Reported make and model: AVIAT AIRCRAFT INC A-1B
- Reported engine: LYCOMING O-360 SERIES
- People aboard: 1
- Fatal injuries: 0
- Other injuries: 0
- NTSB investigation: [NTSB CEN17LA344](https://openairdocs.org/ntsb/CEN17LA344) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20170909017729A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ON 09/09/2017 PILOT DEPARTED KPDC AT APPROX 1 PM AND CONTINUED PHOTOGRAPHING IN IOWA.  STOPPED PHOTO OPS AT ABOUT 1530, CLIMED TO 3,500 MSL, LEVELED OFF, AND WAS HEADING FOR HOME.  ABOUT FIVE MINUTES LATER FELT SOME LIGHT BUFFETING AND AIRCRAFT STARTED TO ROLL LEFT.  PILOT IMMEDIATELY COUNTERED WITH RIGHT STICK BUT HAD LITTLE OR NO AILERON EFFECT.  PILOT WAS ABLE TO STOP THE ROLLING MOMENT AND RETURN TO LEVEL FLIGHT USING RIGHT RUDDER.  PILOT WAS ABLE TO KEEP LEVEL FLIGHT WITH FULL RIGHT AILERON AND STEER USING FULL RIGHT RUDDER INPUTS. PILOT LINED UP A STRAIGHT-IN APPROACH TO RUNWAY 11, WINDS WERE 090 AT 9 KTS.  PILOT WAS ABLE TO MAKE A NORMAL LANDING AND TAXI TO PARKING RAMP.  PILOT MOVED THE STICK TO TRY AND FIND THE PROBLEM AND THE LEFT OUTBOARD AILERON DROPPED TO THE GROUND.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB CEN17LA344](https://openairdocs.org/ntsb/CEN17LA344), Sep 9, 2017: Aviat A 1B (N299CA), Prairie du Chien, WI, substantial damage. Probable cause: The fatigue failure of the aileron hinge bracket tubing for reasons that could not be determined based on the available evidence.

## Other reports on N299CA (1)

Matched to the same aircraft by N-number and date.

- [Accident 20260817011229A](https://openairdocs.org/incident/20260817011229A), Aug 17, 2026: Aviat Aircraft Inc A-1B (N299CA), Pilot Grove, MN, Substantial damage. The Pilot and photographer flew approximately four hours then landed for a break. One hour into the second flight the left aileron detached at the outer…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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