# NTSB SEA86FA092: Cessna 172P, N99034, Seattle, WA, April 5, 1986 - Type: NTSB accident investigation - Classification: Accident · Fatal · Field investigation · Final report - Date: April 5, 1986, 14:30 local (22:30 UTC) - Place: Seattle, WA - Coordinates: 47.740989, -122.199104 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=47.7410&lon=-122.1991&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 4 fatal - Status: Completed - Report: Approved by Office Director - NTSB case key (mKey): 40276 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA86FA092 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40276/pdf - Page: https://openairdocs.org/ntsb/SEA86FA092 ## Analysis (aircraft 2) N99034 DEPARTED KENMORE AIR HARBOR ON A SHORT LOCAL SOLO FLIGHT. WITNESSES REPORTED OBSERVING THE AIRCRAFT TAKEOFF AND INITIATE A CLIMB TO THE SOUTH. N65783 WAS RETURNING FROM A RECURRENCY CHECK FLIGHT AND WAS APPROACHING FROM A SOUTHERLY DIRECTION IN A CLIMB HAVING JUST COMPLETED A TOUCH AND GO LANDING. BOTH AIRCRAFT WERE APPROXIMATELY 200 FEET MSL AT THE TIME OF THE COLLISION. THE RIGHT WING FROM N99034 SEPARATED IN AN AFTWARDS FASHION UPON IMPACT WITH THE RIGHT FLOAT OF N65783. A 49 INCH SECTION OF OUTBOARD RIGHT WING FROM N65783 SEPARATED DURING ITS PENETRATION INTO THE COCKPIT OF N99034. NUMEROUS BOATS WERE OBSERVED ON THE LAKE SURFACE AND CLEAR SUNNY METEOROLOGICAL CONDITIONS PREVAILED. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Midair collision, takeoff - initial climb - visual lookout - inadequate, pilot in command (cause) - diverted attention, pilot in command (contributing factor) - visual lookout - inadequate, pilot of other aircraft (cause) - clearance - not maintained, pilot in command (cause) - clearance - not maintained, pilot of other aircraft (cause) - In flight collision with terrain/water, descent - uncontrolled - Midair collision, takeoff - initial climb - visual lookout - inadequate, pilot in command (cause) - diverted attention, pilot in command (contributing factor) - visual lookout - inadequate, pilot of other aircraft (cause) - clearance - not maintained, pilot in command (cause) - clearance - not maintained, pilot of other aircraft (cause) - In flight collision with terrain/water, descent - uncontrolled ## Aircraft 1 - Registration: [N99034](https://openairdocs.org/deregistered/N99034-1989-04-12), registration cancelled 1989-04-12, S/N 17276394 (OpenAirDocs) - Reported make and model: CESSNA 172P - Registry model: [Cessna 172P](https://openairdocs.org/model/cessna-172p) (registry code 2072436) (OpenAirDocs) - Category: Airplane - Serial number: 17276394 - Airframe hours: 554 - Engines: LYCOMING O-320-D2J 160 horsepower reciprocating - Damage: Destroyed - Flight: Personal, Part 91 - Operator: Kenmore Air Harbor - Airworthiness certificate: Standard, Normal - Last inspection: Annual, March 4, 1986, 66 hours before - Departed: S60, SEATTLE, WA - Flight plan: Company VFR - Airport: S60, Kenmore Air Harbor ## Aircraft 2 - Registration: [N65783](https://openairdocs.org/deregistered/N65783-1988-08-15), registration cancelled 1988-08-15, S/N 17275883 (OpenAirDocs) - Reported make and model: CESSNA 172P - Registry model: [Cessna 172P](https://openairdocs.org/model/cessna-172p) (registry code 2072436) (OpenAirDocs) - Category: Airplane - Serial number: 17275883 - Airframe hours: 1734 - Engines: LYCOMING O-320-D2J 160 horsepower reciprocating - Damage: Destroyed - Flight: Instructional, Part 91 - Operator: Kenmore Air Harbor - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, March 31, 1986, 15 hours before - Departed: S60, SEATTLE, WA - Flight plan: Company VFR - Airport: S60, Kenmore Air Harbor ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot, aircraft N99034; age 19; private; airplane ratings: single-engine sea, single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 98 total, 25 in this make and model, 48 as pilot in command, 7 in the last 90 days - Pilot, aircraft N65783; flight instructor, commercial; airplane ratings: single-engine sea, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: right; toxicology performed; flight hours: 1,590 total, 804 in this make and model, 1,430 as pilot in command ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 8 knots - Visibility: 40 statute miles - Lowest ceiling: none - Temperature: 55 °F, dew point 36 °F - Altimeter: 30.00 inHg - Observed at: PAE, 10 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 19860405039261A](https://openairdocs.org/incident/19860405039261A), Apr 5, 1986: Cessna 172P, Seattle, WA, Destroyed. Light west winds, takeoff legs that crossed, major factors in collision with N65783, climbing out from runway 18. - [Accident 19860405039262A](https://openairdocs.org/incident/19860405039262A), Apr 5, 1986: Cessna 172P, Seattle, WA, Destroyed, 1 fatal. Took off on water runway 18. On climb out, collided with N99034, climbing out from water runway 34. 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.