# NTSB SEA92LA193: Cessna 172N, N737TK, Snohomish, WA, August 31, 1992 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: August 31, 1992, 16:00 local (23:00 UTC) - Place: Snohomish, WA - Coordinates: 47.940849, -121.999374 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=47.9408&lon=-121.9994&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report September 14, 1993 - Report: Approved by Office Director - NTSB case key (mKey): 42890 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA92LA193 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/42890/pdf - Page: https://openairdocs.org/ntsb/SEA92LA193 ## Probable cause (aircraft 2) INADEQUATE VISUAL LOOKOUT BY THE OTHER PILOT. ## Probable cause (aircraft 1) THE PILOT IN COMMAND'S FAILURE TO MAINTAIN ADEQUATE VISUAL LOOKOUT. FACTORS CONTRIBUTING TO THE ACCIDENT WERE THE PILOT IN COMMAND'S POOR VFR PROCEDURES AND HIS INADEQUATE MONITORING OF THE UNICOM FREQUENCY. ## 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 moving on ground - vfr procedures - poor, pilot in command (contributing factor) - monitoring - inadequate, pilot in command (contributing factor) - visual lookout - not maintained, pilot in command (cause) - On ground/water collision with object, landing - roll - object - aircraft moving on ground - visual lookout - not maintained, pilot of other aircraft (cause) - remedial action - not possible, pilot in command ## Analysis (aircraft 2) THE PILOT OF THE STARDUSTER RADIOED HIS ENTRY INTO THE LANDING PATTERN AS WELL AS THE BASE TURN AND FINAL ON THE AIRPORT UNICOM FREQUENCY. AFTER REPORTEDLY CLEARING THE RUNWAY VISUALLY HE TOUCHED DOWN AND DURING THE ROLLOUT OBSERVED THE CESSNA TAXIING ACROSS THE RUNWAY DURING WHICH TIME THE TWO AIRCRAFT COLLIDED. ## Analysis (aircraft 1) THE PILOT OF THE CESSNA TAXIED HIS AIRCRAFT THROUGH THE INTERSECTION OF THE TURF RUNWAY (RWY 31) AT THE UNCONTROLLED AIRPORT DURING WHICH HE COLLIDED WITH THE STARDUSTER WHICH WAS ROLLING OUT FOLLOWING LANDING. THE PILOT OF THE CESSNA REPORTED THAT HE HAD OBSERVED THE TURF RUNWAY CROSSING CAUTIONARY SIGN AND ADMITTED TO THE INTERVIEWING FAA INSPECTOR THAT HE HAD NOT CLEARED THE INTERSECTION FOR ANY POSSIBLE LANDING TRAFFIC PRIOR TO ENTERING. ALTHOUGH THE PILOT OF THE CESSNA INDICATED THAT THE AIRCRAFT RADIO WAS OPERATING ON THE LOCAL UNICOM FREQUENCY, HE REPORTED THAT HE NEVER HEARD ANY TRANSMISSION FROM THE STARDUSTER. A FLIGHT INSTRUCTOR AND STUDENT REPORTED HEARING THE PILOT OF THE STARDUSTER ANNOUNCE HIS ENTRY INTO THE PATTERN, AS WELL AS A CALL TO BASE TURN AND FINAL. THE STARDUSTER PILOT REPORTED NEVER SEEING THE CESSNA UNTIL IMMEDIATELY BEFORE THE COLLISION. ## Aircraft 1 - Registration: [N737TK](https://openairdocs.org/deregistered/N737TK-2018-01-26), registration cancelled 2018-01-26, S/N 17269661, built 1977 (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: 17269661 - Engines: LYCOMING O-320-H2AD 160 horsepower reciprocating - Damage: Destroyed - Flight: Personal, Part 91 - Operator: Wings Aloft - Registered owner: Lee, Stephen W. - Airworthiness certificate: Standard, Normal - Last inspection: Unknown, January 2, 2000 - Departed: S43 - Destination: BFI, SEATTLE, WA - Airport: S43, Harvey Field ## Aircraft 2 - Registration: [N548CL](https://openairdocs.org/aircraft/N548CL), registered now, S/N 548, built 1977 (OpenAirDocs) - Reported make and model: LAMB/STARDUSTER SA300 - Registry model: [Lamb STARDUSTER II](https://openairdocs.org/model/lamb-starduster-ii) (registry code 8660355) (OpenAirDocs) - Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 548 - Engines: LYCOMING O-360 180 horsepower reciprocating - Damage: Destroyed - Flight: Personal, Part 91 - Operator: Rosenfield, John W. - Registered owner: Rosenfield, John W. - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, July 25, 1992 - Departed: S88, ARLINGTON, WA - Airport: S43, Harvey Field, runway 31, 2,400 × 75 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot, aircraft N737TK; age 56; private; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 2,238 total - Pilot, aircraft N548CL; age 68; private; airplane ratings: single-engine land, single-engine sea; medical: class 2, valid medical--w/ waivers/lim; seat: rear; flight hours: 1,100 total, 10 in this make and model, 980 as pilot in command ## Weather - Conditions: Visual (VMC), Day - Wind: 330° at 8 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 77 °F, dew point 55 °F - Altimeter: 29.00 inHg - Observed at: PAE, 7 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 19920831034921A](https://openairdocs.org/incident/19920831034921A), Aug 31, 1992: Cessna 172N, Snohomish, WA, Substantial damage. Taxied across grass runway and collided wing to wing with landing N548CL. Failed to give right of way or use radio. - [Accident 19920831034922A](https://openairdocs.org/incident/19920831034922A), Aug 31, 1992: Amtrso STARDUSTR300, Snohomish, WA, Substantial damage. Landing on grass runway was struck wing to wing by N737TK that was crossing runway on taxiway and failed to yield. 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.