# NTSB CHI07CA304: Beech C23, N9793L, Carrollton, OH, September 22, 2007 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Data collection · Final report - Date: September 22, 2007, 08:45 local (12:45 UTC) - Place: Carrollton, OH - Coordinates: 40.561943, -81.077499 - Nearby events: https://openairdocs.org/map.md?lat=40.5619&lon=-81.0775&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 2 minor - Status: Completed, report December 20, 2007 - Report: Approved by Office Director - Parties: Federal Aviation Administration - Cleaveland FSDO - NTSB case key (mKey): 67078 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI07CA304 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/67078/pdf - Page: https://openairdocs.org/ntsb/CHI07CA304 ## Probable cause The partial loss of engine power during approach due to carburetor ice and the uneven terrain encountered during the forced landing which caused the airplane to nose over. Weather conducive to carburetor icing was a contributing factor. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(partial) - nonmechanical, approach - vfr pattern - final approach - fuel system,carburetor - ice (cause) - weather condition - carburetor icing conditions (contributing factor) - Forced landing, emergency descent/landing - Nose over, emergency descent/landing - terrain condition - rough/uneven (cause) ## Analysis The airplane nosed over during a forced landing following the partial loss of engine power in the traffic pattern. The pilot reported that while on downwind he reduced engine power to initiate a descent. While on base leg the airplane descended below glide path. The engine did not respond to multiple throttle inputs and continued to operate at 1,500 rpm regardless of throttle position. The airplane was too low to make the airport and a forced landing was made to a cornfield. The airplane nosed over during landing. Twelve gallons of fuel were drained from the airplane after the accident. The fuel selector was positioned on the left tank, the mixture control was mid-travel, and the carburetor heat was "off." The throttle, mixture, and carburetor heat controls functioned properly. A post accident inspection did not reveal any anomalies consistent with a loss of engine power. The temperature and dew point in the vicinity of the accident site were 20 degrees and 17 degrees Celsius, respectively. Data indicated the possibility of moderate carburetor icing at cruise power and serious icing at descent power under those conditions. ## Factual narrative The airplane nosed over during a forced landing following the partial loss of engine power in the traffic pattern. The pilot reported that while on downwind he reduced engine power to initiate a descent. While on base leg the airplane descended below glide path. The engine did not respond to multiple throttle inputs and continued to operate at 1,500 rpm regardless of throttle position. The airplane was too low to make the airport and a forced landing was made to a cornfield. The airplane nosed over during landing. Twelve gallons of fuel were drained from the airplane after the accident. The fuel selector was positioned on the left tank, the mixture control was mid-travel, and the carburetor heat was "off." The throttle, mixture, and carburetor heat controls functioned properly. A post accident inspection did not reveal any anomalies consistent with a loss of engine power. The temperature and dew point in the vicinity of the accident site were 20 degrees and 17 degrees Celsius, respectively. Data indicated the possibility of moderate carburetor icing at cruise power and serious icing at descent power under those conditions. ## Aircraft - Registration: [N9793L](https://openairdocs.org/deregistered/N9793L-2009-01-12), registration cancelled 2009-01-12, S/N M-1398, built 1972 (OpenAirDocs) - Reported make and model: Beech C23 - Registry model: [Beech C23](https://openairdocs.org/model/beech-c23) (registry code 1151242) (OpenAirDocs) - Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: M-1398 - Airframe hours: 4755.3 - Engines: Lycoming O-360-A4G 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, October 1, 2006 - Departed: 1G8, Toronto, OH - Destination: TSO, Carrollton, OH - Airport: TSO, Carroll County - Tolson Arpt., runway 25, 4,300 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 70; injuries: minor; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review August 1, 2007; seat: left; flight hours: 721 total, 696 in this make and model, 696 as pilot in command, 4 in the last 90 days, 1 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 68 °F, dew point 63 °F - Altimeter: 30.06 inHg - Observed at: PHD, 16 nm away 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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.