CESSNA 340A
Waukesha, WI — February 25, 2017
Event Information
| Date | February 25, 2017 |
| Event Type | ACC |
| NTSB Number | CEN17CA114 |
| Event ID | 20170301X20646 |
| Location | Waukesha, WI |
| Country | USA |
| Coordinates | 43.04111, -88.23695 |
| Airport | Waukesha County Airport |
| Highest Injury | NONE |
Aircraft
| Make | CESSNA |
| Model | 340A |
| Category | AIR |
| FAR Part | 091 |
| Aircraft Damage | SUBS |
Conditions
| Light Condition | DUSK |
| Weather | IMC |
Injuries
| Fatal | 0 |
| Serious | 0 |
| Minor | 0 |
| None | 1 |
| Total Injured | 0 |
Event Location
Probable Cause
The pilot’s decision to fly in in conditions conducive to structural icing and her subsequent failure to maintain airplane control during the instrument approach.
Full Narrative
Prior to the positioning flight, the pilot monitored the weather and noticed the weather conditions were deteriorating near the time of the planned departure. The weather conditions included low visibility, freezing drizzle, and mist. In an effort to reduce the time in the deteriorating weather conditions, the pilot performed some before takeoff checks while the airplane was in the hangar. During the pilot's "haste" to preflight and takeoff, she inadvertently selected the wrong switch for windshield heat. While on the instrument approach to the runway in night conditions, the pilot had no forward visibility due to ice accumulation on the windshield. The pilot executed a missed approach and contacted an instructor pilot at the departure airport to confirm the location of the windshield heat switch. The pilot then activated the windshield heat switch and enough ice had melted for the pilot to conduct another approach. During the approach, the pilot increased the airspeed due to "carrying a lot of ice." On short final approach, the airplane descended below the glide path due to the ice accumulation. Subsequently, the airplane contacted the terrain short of the runway, and "skipped" onto the runway. The airplane came to rest upright and off the runway surface. Examination of the airplane revealed substantial damage to the left wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.
About This NTSB Record
This aviation event was investigated by the National Transportation Safety Board (NTSB). NTSB investigates all U.S. civil aviation accidents to determine probable cause and issue safety recommendations to prevent future accidents.