# NTSB CHI07FA140: Cessna 172N, N6614D, Sharonville, OH, May 11, 2007 - Type: NTSB accident investigation - Classification: Accident · Fatal · Field investigation · Final report - Date: May 11, 2007, 15:02 local (19:02 UTC) - Place: Sharonville, OH - Coordinates: 39.299446, -84.375556 - Nearby events: https://openairdocs.org/map.md?lat=39.2994&lon=-84.3756&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 3 fatal - Status: Completed, report April 30, 2008 - Report: Approved by Office Director - Parties: Hawker Beechcraft Corporation, Cessna Aircraft Company, Federal Aviation Administration - NTSB case key (mKey): 65812 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI07FA140 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/65812/pdf - Page: https://openairdocs.org/ntsb/CHI07FA140 ## Probable cause (aircraft 2) The inadequate visual lookout of the pilots in both airplanes and their not maintaining clearance from each others airplane during climb. ## Probable cause (aircraft 1) The inadequate visual lookout of the pilots in both airplanes, and their failure to maintain clearance from each other's airplane. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Midair collision, climb - visual lookout - inadequate, pilots of both aircraft (cause) - clearance - not maintained, pilots of both aircraft (cause) - In flight collision with terrain/water, descent - uncontrolled - terrain condition - ground - Midair collision, approach - vfr pattern - final approach - visual lookout - inadequate, pilots of both aircraft (cause) - clearance - not maintained, pilots of both aircraft (cause) - In flight collision with terrain/water, descent - uncontrolled ## Analysis (aircraft 2) The radar screen depictions of the flights showed an airplane departing from the airport about 1452. A pilot representing N1835L requested flight following. The flight following was not available due to controller workload. The radar showed that the airplane was performing maneuvers north of the airport between 2,600 and 2,900 feet above mean sea level. The radar showed that airplane descending and returning to the airport. The radar showed another airplane departing from the airport to the north about 1500. The second airplane was climbing. The radar data showed that about 1502, the airplanes' radar returns came together. A witness stated, "I looked out my window right in front of my desk after [a co-worker] said 'Oh My God.' I then saw the two planes within about 1/2 mile apart and heading in a direction towards each other but not directly head on. When the planes were very close, ... both rolled inside towards each other and that is when the wings clipped each other. No pre-impact anomalies were detected during the examination of either airplane. The sky condition was clear. Both airplanes were communicating on the airport's Unicom frequency. 14 CFR Part 91.113 stated that the pilots in both airplanes are responsible to see and avoid each other. ## Analysis (aircraft 1) Two airplanes, a high-wing Cessna, and a low-wing Beech, collided in midair, about two miles north of a non-tower controlled general aviation airport. Both airplanes had departed the same airport about 8 minutes apart. Radar data from a nearby air traffic control approach facility disclosed that the first to depart was the Beech, and the pilot requested VFR flight following from air traffic control. Due to workload, the air traffic control specialist declined to provide the service. Radar derived information indicated that the Beech was maneuvering north of the airport at altitudes between 2,600 and 2,900 feet msl, and then began a descent and a return to the airport. The Cessna began his departure and climb as the Beech approached the airport. A witness related that he saw both airplanes approaching each other, about ½ mile apart, on an apparent collision course, but not directly head-on. He watched as both airplanes closed their relative distance, and saw both airplanes roll towards each other, clipping each other's wing. Both airplanes immediately descended to impact. Postaccident inspection disclosed no preaccident mechanical issues with either airplane. The sky was clear, and both pilot's had been communicating on the local airport Unicom (voluntary traffic advisory) frequency. Federal aviation regulations state that each pilot has the responsibility to see and avoid each other. ## Factual narrative (aircraft 2) HISTORY OF FLIGHT On May 11, 2007, approximately 1502 eastern daylight time, a Cessna 172N high-wing airplane, N6614D, operated by Flying Neutrons Inc., and a Beech V35B low-wing airplane, N1835L, operated by a private pilot, collided in flight over Sharonville, Ohio, approximately two miles north of the Cincinnati-Blue Ash Airport (ISZ), near Blue Ash, Ohio. The Cessna was destroyed following an uncontrolled descent and impact with a tree and terrain near the intersection of Sovereign Drive and Squire Hill Court. The Beech was destroyed following an uncontrolled descent and impact with East Kemper Road, about one-quarter mile west of its intersection with Honeywell Drive. The certified flight instructor (CFI) and dual student aboard the Cessna sustained fatal injuries. The private pilot aboard the Beech sustained fatal injuries. The Cessna was operating under 14 CFR Part 91 on a local instructional flight, and a flight plan was not filed. The Beech was operating under 14 CFR Part 91 on a local personal flight, and a flight plan was not filed. Visual meteorological conditions prevailed in the area at the time of the accident. The Beech departed ISZ about 1452 and was returning to ISZ. The Cessna departed ISZ about 1500. The radar screen depictions of the flights were reviewed at the approach control facility for the Cincinnati/Northern Kentucky International Airport, near Covington, Kentucky. Federal Aviation Administration (FAA) radar data showed an airplane departing from ISZ about 1452. A pilot representing N1835L requested flight following. The flight following was not available due to controller workload. The radar showed that the airplane was performing maneuvers north of ISZ between 2,600 and 2,900 feet above mean sea level. The radar showed that airplane descending and returning to ISZ. The radar showed another airplane departing ISZ to the north about 1500. The second airplane was climbing. The radar data showed that about 1502, the airplanes' radar returns came together. A witness in an office building, about one-half mile from the impact, saw both airplanes in flight. An interview with the witness, in part, stated: I looked out my window right in front of my desk after [a co-worker] said 'Oh My God.' I then saw the two planes within about 1/2 mile apart and heading in a direction towards each other but not directly head on. When the planes were very close, ... both rolled inside towards each other and that is when the wings clipped each other. PERSONNEL INFORMATION N6614D The CFI was an airline transport pilot with a multi-engine land rating and commercial pilot privileges with single engine land airplanes. He held a CFI certificate with airplane single engine and instrument airplane ratings. He held a FAA Second Class medical certificate with a limitation for corrective lenses, dated September 12, 2006. On the application for that medical, he indicated that he had accumulated 4,191 hours of total flight time and 100 hours in the six months prior to the application. That medical certificate indicated that his near, intermediate, and distant vision was corrected to 20/20. His pilot logbook indicated that he had logged a total of 4,241 flight hours of which 2,158.6 hours were logged as a flight instructor. An endorsement showed that he completed a flight review on April 11, 2006. The dual student was a private pilot with a single engine land rating. He held a FAA Third Class medical certificate, dated July 1, 2004. That medical certificate indicated that his near and distant vision with both eyes was 20/30. The pilot passed his Private Pilot checkride on June 30, 2005. The pilot's logbook indicated that the pilot had a total of 118.9 hours of total flight time and 60.2 hours of total pilot in command time. N1835L The pilot was a private pilot with a single engine land and instrument ratings. He held a FAA Third Class medical certificate with a limitation for corrective lenses, dated September 22, 2004. On the application for that medical, he indicated that he had accumulated 1,100 hours of total flight time and 20 hours in the six months prior to the application. That medical certificate indicated that his distant vision with both eyes was 20/30 and his near vision with both eyes was corrected to 20/20. AIRCRAFT INFORMATION N6614D The 1979 Cessna 172N, serial number 17272901, was an externally braced high-wing, propeller-driven, fixed landing gear, semi-monocoque design, four-seat airplane. The airplane was powered by a direct drive, horizontally opposed, carbureted, normally aspirated, air-cooled, four-cylinder Lycoming O-360-A4M engine, serial number RL-27815-36A, rated at 160 horsepower at 2,400 rpm, and was driving a fixed-pitch, Sensenich 76EM8514-0-60, with serial number 36980K. According to the airframe logbook, the airplane's most recent annual inspection was completed on June 23, 2006, with an airframe total time of 7,240 hours. The airplane's most recent 100-hour inspection was completed on March 19, 2007, with an airframe total time of 7,502 hours. N1835L The 1978 Beech V35B, Bonanza, serial number D-10097, was a low wing, all-metal, single-engine, V-tailed, four-place monoplane, which had retractable tricycle landing gear. The airplane was equipped with a fuel-injected, air-cooled, six-cylinder, horizontally-opposed, Continental IO-550-B engine, serial number 281581-R, which was rated at 285 horsepower, and a Hartzell 3-bladed, all-metal, constant-speed propeller. According to the airplane's maintenance records, the last recorded annual inspection was dated April 20, 2007, with an airframe total time of 3,089 hours. Major repair and alteration records showed that the engine installation on the aircraft was approved October 19, 1990, in accordance with supplemental type certificate SA2200SW. METEOROLOGICAL INFORMATION At 1453, the recorded weather at the Cincinnati Municipal Airport-Lunken Field, near Cincinnati, Ohio, was: Wind 300 degrees at 9 knots; visibility 10 statute miles; sky condition clear; temperature 30 degrees C; dew point 11 degrees C; altimeter 29.94 inches of mercury. COMMUNICATIONS The transmissions on the Unicom frequency were recorded and posted on an internet web site. An excerpt from those transmissions follows: Parties Making Transmissions Abbreviations Pilot representing Cessna 152, N6389B N6389B Pilot representing Gieleghem RV-8, N800PB N800PB Pilot representing Cessna N30F N30F Pilot representing Beech V35B, N1835L N1835L Pilot representing Cessna 172N, N6614D N6614D Pilot representing Piper PA-32-260, N3874W N3874W Unknown party making transmission Unknown N1835L ah Blue Ash traffic bonanza one eight three five lima is five miles north of the field we'll be entering left downwind runway six full stop N6614D Blue Ash traffic Cessna six six one four delta has just departed runway six and now departing on heading three two zero climbing through uh two thousand one hundred we'll be looking for the bonanza on the (unintelligible) N30F Middletown uh traffic this is Cessna three zero fox turning base for runway zero five N1835L Blue Ash traffic bonanza three five lima four miles to the field at three thousand feet we'll be entering left downwind runway six N6389B Dayton Wright Brothers Cessna six three eight nine bravo downwind runway two Dayton Wright Brothers Unknown (unintelligible communication/sounds) Unknown (unintelligible) N3874W Cherokee three eight seven four whisky four to the south inbound for landing uh what runway you preferring today? N800PB Middletown traffic eight hundred papa bravo downwind for runway nine in the grass full stop N3874W Blue Ash traffic Cherokee three eight seven four whisky be crossing midfield under a right for a full stop AIRPORT INFORMATION The airport elevation at ISZ was 856 feet MSL. ISZ was ## Factual narrative (aircraft 1) HISTORY OF FLIGHT On May 11, 2007, approximately 1502 eastern daylight time, a Cessna 172N high-wing airplane, N6614D, operated by Flying Neutrons Inc., and a Beech V35B low-wing airplane, N1835L, operated by a private pilot, collided in flight over Sharonville, Ohio, approximately two miles north of the Cincinnati-Blue Ash Airport (ISZ), near Blue Ash, Ohio. The Cessna was destroyed following an uncontrolled descent and impact with a tree and terrain near the intersection of Sovereign Drive and Squire Hill Court. The Beech was destroyed following an uncontrolled descent and impact with East Kemper Road, about one-quarter mile west of its intersection with Honeywell Drive. The certified flight instructor (CFI) and dual student aboard the Cessna sustained fatal injuries. The private pilot aboard the Beech sustained fatal injuries. The Cessna was operating under 14 CFR Part 91 on a local instructional flight, and a flight plan was not filed. The Beech was operating under 14 CFR Part 91 on a local personal flight, and a flight plan was not filed. Visual meteorological conditions prevailed in the area at the time of the accident. The Beech departed ISZ about 1452 and was returning to ISZ. The Cessna departed ISZ about 1500. The radar screen depictions of the flights were reviewed at the approach control facility for the Cincinnati/Northern Kentucky International Airport, near Covington, Kentucky. Federal Aviation Administration (FAA) radar data showed an airplane departing from ISZ about 1452. A pilot representing N1835L requested flight following. The flight following was not available due to controller workload. The radar showed that the airplane was performing maneuvers north of ISZ between 2,600 and 2,900 feet above mean sea level. The radar showed that airplane descending and returning to ISZ. The radar showed another airplane departing ISZ to the north about 1500. The second airplane was climbing. The radar data showed that about 1502, the airplanes' radar returns came together. A witness in an office building, about one-half mile from the impact, saw both airplanes in flight. An interview with the witness, in part, stated: I looked out my window right in front of my desk after [a co-worker] said 'Oh My God.' I then saw the two planes within about 1/2 mile apart and heading in a direction towards each other but not directly head on. When the planes were very close, ... both rolled inside towards each other and that is when the wings clipped each other. PERSONNEL INFORMATION N6614D The CFI was an airline transport pilot with a multi-engine land rating and commercial pilot privileges with single engine land airplanes. He held a CFI certificate with airplane single engine and instrument airplane ratings. He held a FAA Second Class medical certificate with a limitation for corrective lenses, dated September 12, 2006. On the application for that medical, he indicated that he had accumulated 4,191 hours of total flight time and 100 hours in the six months prior to the application. That medical certificate indicated that his near, intermediate, and distant vision was corrected to 20/20. His pilot logbook indicated that he had logged a total of 4,241 flight hours of which 2,158.6 hours were logged as a flight instructor. An endorsement showed that he completed a flight review on April 11, 2006. The dual student was a private pilot with a single engine land rating. He held a FAA Third Class medical certificate, dated July 1, 2004. That medical certificate indicated that his near and distant vision with both eyes was 20/30. The pilot passed his Private Pilot checkride on June 30, 2005. The pilot's logbook indicated that the pilot had a total of 118.9 hours of total flight time and 60.2 hours of total pilot in command time. N1835L The pilot was a private pilot with a single engine land and instrument ratings. He held a FAA Third Class medical certificate with a limitation for corrective lenses, dated September 22, 2004. On the application for that medical, he indicated that he had accumulated 1,100 hours of total flight time and 20 hours in the six months prior to the application. That medical certificate indicated that his distant vision with both eyes was 20/30 and his near vision with both eyes was corrected to 20/20. AIRCRAFT INFORMATION N6614D The 1979 Cessna 172N, serial number 17272901, was an externally braced high-wing, propeller-driven, fixed landing gear, semi-monocoque design, four-seat airplane. The airplane was powered by a direct drive, horizontally opposed, carbureted, normally aspirated, air-cooled, four-cylinder Lycoming O-360-A4M engine, serial number RL-27815-36A, rated at 160 horsepower at 2,400 rpm, and was driving a fixed-pitch, Sensenich 76EM8514-0-60, with serial number 36980K. According to the airframe logbook, the airplane's most recent annual inspection was completed on June 23, 2006, with an airframe total time of 7,240 hours. The airplane's most recent 100-hour inspection was completed on March 19, 2007, with an airframe total time of 7,502 hours. N1835L The 1978 Beech V35B, Bonanza, serial number D-10097, was a low wing, all-metal, single-engine, V-tailed, four-place monoplane, which had retractable tricycle landing gear. The airplane was equipped with a fuel-injected, air-cooled, six-cylinder, horizontally-opposed, Continental IO-550-B engine, serial number 281581-R, which was rated at 285 horsepower, and a Hartzell 3-bladed, all-metal, constant-speed propeller. According to the airplane's maintenance records, the last recorded annual inspection was dated April 20, 2007, with an airframe total time of 3,089 hours. Major repair and alteration records showed that the engine installation on the aircraft was approved October 19, 1990, in accordance with supplemental type certificate SA2200SW. METEOROLOGICAL INFORMATION At 1453, the recorded weather at the Cincinnati Municipal Airport-Lunken Field, near Cincinnati, Ohio, was: Wind 300 degrees at 9 knots; visibility 10 statute miles; sky condition clear; temperature 30 degrees C; dew point 11 degrees C; altimeter 29.94 inches of mercury. COMMUNICATIONS The transmissions on the Unicom frequency were recorded and posted on an internet web site. An excerpt from those transmissions follows: Parties Making Transmissions Abbreviations Pilot representing Cessna 152, N6389B N6389B Pilot representing Gieleghem RV-8, N800PB N800PB Pilot representing Cessna N30F N30F Pilot representing Beech V35B, N1835L N1835L Pilot representing Cessna 172N, N6614D N6614D Pilot representing Piper PA-32-260, N3874W N3874W Unknown party making transmission Unknown N1835L ah Blue Ash traffic bonanza one eight three five lima is five miles north of the field we'll be entering left downwind runway six full stop N6614D Blue Ash traffic Cessna six six one four delta has just departed runway six and now departing on heading three two zero climbing through uh two thousand one hundred we'll be looking for the bonanza on the (unintelligible) N30F Middletown uh traffic this is Cessna three zero fox turning base for runway zero five N1835L Blue Ash traffic bonanza three five lima four miles to the field at three thousand feet we'll be entering left downwind runway six N6389B Dayton Wright Brothers Cessna six three eight nine bravo downwind runway two Dayton Wright Brothers Unknown (unintelligible communication/sounds) Unknown (unintelligible) N3874W Cherokee three eight seven four whisky four to the south inbound for landing uh what runway you preferring today? N800PB Middletown traffic eight hundred papa bravo downwind for runway nine in the grass full stop N3874W Blue Ash traffic Cherokee three eight seven four whisky be crossing midfield under a right for a full stop AIRPORT INFORMATION The airport elevation at ISZ was 856 feet MSL. ISZ was ## Aircraft 1 - Registration: [N6614D](https://openairdocs.org/deregistered/N6614D-2007-10-23), registration cancelled 2007-10-23, S/N 17272901, built 1979 (OpenAirDocs) - Reported make and model: Cessna 172N - Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (registry code 2072434) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 17272901 - Airframe hours: 7502 - Engines: Lycoming O-360-A4M 180 horsepower reciprocating - Damage: Destroyed - Flight: Instructional, Part 91 - Registered owner: Flying Neutrons Inc - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, March 1, 2007 - Departed: ISZ, Blue Ash, OH - Airport: ISZ, Cincinnati-Blue Ash Airport ## Aircraft 2 - Registration: [N1835L](https://openairdocs.org/deregistered/N1835L-2012-08-13), registration cancelled 2012-08-13, S/N D-10097, built 1978 (OpenAirDocs) - Reported make and model: Beech V35B - Registry model: [Beech V35B](https://openairdocs.org/model/beech-v35b) (registry code 1151548) (OpenAirDocs) - Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: D-10097 - Airframe hours: 3089 - Engines: Continental IO-550-B 285 horsepower reciprocating - Damage: Destroyed - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, April 1, 2007 - Departed: ISZ, Blue Ash, OH - Airport: ISZ, Cincinnati-Blue Ash Airport ## Flight crew As NTSB recorded them. NTSB leaves out names. - Flight instructor, aircraft N6614D; age 65; injuries: fatal; flight instructor, airline transport, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review April 1, 2006; seat: right; toxicology performed; flight hours: 4,241 total - Student pilot, aircraft N6614D; age 31; injuries: fatal; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; last flight review June 1, 2005; seat: left; toxicology performed; flight hours: 119 total, 60 as pilot in command - Pilot, aircraft N1835L; age 64; injuries: fatal; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, with waivers/limitations; seat: left; toxicology performed; flight hours: 1,100 total ## Weather - Conditions: Visual (VMC), Day - Wind: 300° at 9 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 86 °F, dew point 52 °F - Altimeter: 29.94 inHg - Observed at: LUK, 9 nm away ## FAA reports on this event (2) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20070511022591A](https://openairdocs.org/incident/20070511022591A), May 11, 2007: Cessna 172N, Sharonville, OH, Destroyed, 2 fatal. (-23) On-scene investigation revealed that the Cessna 172N (N6614D) and Beech V35B (N1835L) struck one another while flying in the vicinity of blue ash airport… - [Accident 20070511832489A](https://openairdocs.org/incident/20070511832489A), May 11, 2007: Beech V35B, Cincinnati, OH, Destroyed, 1 fatal. (-23) On-scene investigation revealed that the Beech V35B (1835L) and Cessna 172N (N6614D) struck one another while flying in the vicinity of Blue ash airport… 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.