# NTSB BFO91LA056: Cessna 206, N734LN, Frederick, MD, June 23, 1991 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: June 23, 1991, 12:30 local (16:30 UTC) - Place: Frederick, MD - Coordinates: 39.420524, -77.409584 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=39.4205&lon=-77.4096&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report December 14, 1992 - Report: Approved by Office Director - NTSB case key (mKey): 11683 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=BFO91LA056 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/11683/pdf - Page: https://openairdocs.org/ntsb/BFO91LA056 ## Probable cause (aircraft 2) THE PILOT OF THE OTHER AIRCRAFT FAILED TO MAINTAIN ADEQUATE CLEARANCE WITH A PARKED AIRCRAFT. ## Probable cause (aircraft 1) THE PILOT MISJUDGED AND FAILED TO MAINTAIN ADEQUATE CLEARANCE WITH A PARKED AIRCRAFT. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water collision with object, taxi - to takeoff - object - aircraft parked/standing - clearance - not maintained, pilot in command (cause) - On ground/water collision with object, standing - engine(s) operating - clearance - not maintained, pilot of other aircraft (cause) ## Analysis (aircraft 2) THE CESSNA 206 PILOT WAS ATTEMPTING TO PASS IN FRONT OF THE CESSNA 310 THAT WAS PARKED OFF THE SIDE OF THE TAXIWAY. THE CESSNA 310 WAS PARKED PERPENDICULAR TO THE TAXIWAY AND THE ENGINES WERE OPERATING. THE FRONT OF THE CESSNA 310 WAS PARTIALLY OVER THE TAXIWAY. THE CESSNA 206 RIGHT WING STRUCK THE LEFT PROPELLER, SEVERING A SECTION OF THE WING. ## Analysis (aircraft 1) THE CESSNA 206 PILOT WAS ATTEMPTING TO PASS IN FRONT OF THE CESSNA 310 THAT WAS PARKED OFF THE SIDE OF THE TAXIWAY. THE CESSNA 310 WAS PARKED PERPENDICULAR TO THE TAXIWAY AND THE ENGINES WERE OPERATING. THE FRONT OF THE CESSNA 310 WAS PARTIALLY OVER THE TAXIWAY. THE CESSNA 206 RIGHT WING STRUCK THE LEFT PROPELLER, SEVERING A SECTION OF THE WING. ## Aircraft 1 - Registration: N734LN (not matched to a registry record) - Reported make and model: CESSNA 206 - Category: Airplane - Serial number: V20604849 - Engines: CONTINENTAL IO-520-A 300 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: John D. O'Leary - Registered owner: John D. O'Leary - Airworthiness certificate: Standard, Normal - Last inspection: Annual, August 1, 1990, 0 hours before - Departed: FDK, FREDERICK, MD - Destination: N92, MIDDLETOWN, DE - Flight plan: IFR - Airport: FDK, Frederick Muni, runway 5, 5,200 × 100 ft, asphalt ## Aircraft 2 - Registration: N8631G (not matched to a registry record) - Reported make and model: CESSNA 310R - Category: Airplane - Serial number: 2074245 - Engines: CONTINENTAL IO-520M 285 horsepower reciprocating - Damage: Minor damage - Flight: Personal, Part 91 - Operator: Ignatius Sargent - Registered owner: Ignatius Sargent - Airworthiness certificate: Standard, Normal - Last inspection: Annual, August 20, 1991, 80 hours before - Destination: DCA, WASHINGTON, DC - Flight plan: IFR - Airport: FDK, Frederick Muni, runway 5, 5,200 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot, aircraft N734LN; age 63; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 795 total, 548 in this make and model, 569 as pilot in command, 11 in the last 90 days, 7 in the last 30 days, 6 in the last 24 hours - Pilot, aircraft N8631G; age 77; commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 13,000 total, 5,180 in this make and model, 13,000 as pilot in command, 48 in the last 90 days, 30 in the last 30 days, 5 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 150° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: 1,500 ft overcast - Temperature: 59 °F, dew point 55 °F - Altimeter: 30.00 inHg ## 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 19910623023791A](https://openairdocs.org/incident/19910623023791A), Jun 23, 1991: Cessna U206G, Frederick, MD, Substantial damage. During taxi for takeoff right wing collided with idling prop of 310 N8631G that was holding near taxiway. - [Accident 19910623023792A](https://openairdocs.org/incident/19910623023792A), Jun 23, 1991: Cessna 310R, Frederick, MD, Minor damage. While holding near taxiway not completly clear. Left prop hit by wing of 206 N734LN that was taxiing for takeoff. 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.