# NTSB ANC88FA063: Cessna 206, N4882U, Dillingham, AK, May 25, 1988 - Type: NTSB accident investigation - Classification: Accident · Fatal · Field investigation · Final report - Date: May 24, 1988, 19:46 local (May 25, 1988, 03:46 UTC) - Place: Dillingham, AK - Coordinates: 58.819953, -157.860946 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=58.8200&lon=-157.8609&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 4 fatal - Status: Completed, report July 21, 1989 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 4955 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC88FA063 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4955/pdf - Page: https://openairdocs.org/ntsb/ANC88FA063 ## 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) - visual lookout - inadequate, pilot of other aircraft (cause) - in-flight planning/decision - poor, pilot of other aircraft (contributing factor) - In flight collision with terrain/water, descent - uncontrolled - Midair collision, cruise - visual lookout - inadequate, pilot in command (cause) - visual lookout - inadequate, pilot of other aircraft (cause) - in-flight planning/decision - poor, pilot in command (contributing factor) - In flight collision with terrain/water, descent - uncontrolled ## Analysis (aircraft 2) A CESSNA 206 AIRPLANE AND AN AEROSPATIALE AS350D HELICOPTER COLLIDED IN MIDAIR ONE-HALF MILE SOUTH OF THE DILLINGHAM AIRPORT, DILLINGHAM, AK. BOTH AIRCRAFT HAD BEEN COMMUNICATING WITH THE DILLINGHAM FLIGHT SERVICE STATION AND HAD RECEIVED THE APPROPRIATE FLIGHT ADVISORIES. THE CESSNA WAS PRACTICING LANDINGS, AND HAD JUST DEPARTED RUNWAY 19 WHEN IT WAS STRUCK FROM THE LEFT SIDE AT AN ALTITUDE OF APPROXIMATELY 400' AGL. THE HELICOPTER WAS ON A 14 CFR PART 135 CARGO ONLY FLIGHT, AND WAS IN LEVEL CRUISE OR A SLIGHT CLIMB AT THE TIME OF THE ACCIDENT. WITNESSES RELATED THAT NEITHER AIRCRAFT TOOK EVASIVE ACTION PRIOR TO IMPACT. THE HELICOPTER'S MAIN ROTOR HUB AND TAIL BOOM SEPARATED PRIOR TO GROUND IMPACT, AND THE CESSNA'S TAIL SECTION SEPARATED AND RIGHT WING FOLDED PRIOR TO GROUND IMPACT. TAIL ROTOR BLADE STRIKES WERE VISIBLE ON THE BOTTOM AND RIGHT SIDE OF THE CESSNA, AND MAIN ROTOR BLADE STRIKES WERE VISIBLE ON THE RIGHT SIDE OF THE FUSELAGE. ## Analysis (aircraft 1) A CESSNA 206 AIRPLANE AND AN AEROSPATIALE AS350D HELICOPTER COLLIDED IN MIDAIR ONE-HALF MILE SOUTH OF THE DILLINGHAM AIRPORT, DILLINGHAM AK. BOTH AIRCRAFT HAD BEEN COMMUNICATING WITH THE DILLINGHAM FLIGHT SERVICE STATION AND HAD RECEIVED THE APPROPRIATE FLIGHT ADVISORIES. THE CESSNA WAS PRACTICING LANDINGS, AND HAD JUST DEPARTED RUNWAY 19 WHEN IT WAS STRUCK FROM THE LEFT SIDE AT AN ALTITUDE OF APPROXIMATELY 400' AGL. THE HELICOPTER WAS ON A 14 CFR PART 135 CARGO ONLY FLIGHT, AND WAS IN LEVEL CRUISE OR A SLIGHT CLIMB AT THE TIME OF THE ACCIDENT. WITNESSES RELATED THAT NEITHER AIRCRAFT TOOK EVASIVE ACTION PRIOR TO IMPACT. THE HELICOPTER'S MAIN ROTOR HUB AND TAIL BOOM SEPARATED PRIOR TO GROUND IMPACT, AND THE CESSNA'S TAIL SECTION SEPARATED AND RIGHT WING FOLDED PRIOR TO GROUND IMPACT. TAIL ROTOR BLADE STRIKES WERE VISIBLE ON THE BOTTOM AND RIGHT SIDE OF THE CESSNA, AND MAIN ROTOR BLADE STRIKES WERE VISIBLE ON THE RIGHT SIDE OF THE FUSELAGE. ## Aircraft 1 - Registration: [N4882U](https://openairdocs.org/deregistered/N4882U-1989-01-05), registration cancelled 1989-01-05, S/N U20605140 (OpenAirDocs) - Reported make and model: CESSNA 206 - Registry model: [Cessna U206G](https://openairdocs.org/model/cessna-u206g) (registry code 2073356) (OpenAirDocs) - Category: Airplane - Serial number: U20605140 - Airframe hours: 4259 - Engines: CONTINENTAL IO-520F 300 horsepower reciprocating - Damage: Destroyed - Flight: Other work use, Part 91 - Operator: Starflite, Inc., doing business as Manokotak Air - Registered owner: Starflite, Inc. - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, May 5, 1988, 75 hours before - Departed: DLG, DILLINGHAM, AK - Destination: DLG - Airport: runway 19, 6,400 × 150 ft, asphalt ## Aircraft 2 - Registration: [N353EH](https://openairdocs.org/deregistered/N353EH-1991-03-28), registration cancelled 1991-03-28, S/N 1338 (OpenAirDocs) - Reported make and model: AEROSPATIALE AS350D - Registry model: [S N I A S AS350D ASTAR](https://openairdocs.org/model/s-n-i-a-s-as350d-astar) (registry code 8680803) (OpenAirDocs) - Category: Helicopter - Serial number: 1338 - Airframe hours: 3250 - Engines: LYCOMING LTS101600A3 531 horsepower turbo shaft - Damage: Destroyed - Fire: On-Ground - Flight: Part 135 - Registered owner: Era Helicopters, Inc. - Airworthiness certificate: Standard, Normal - Last inspection: Unknown, May 19, 1988, 5 hours before - Departed: DLG, DILLINGHAM, AK - Destination: HAGEMEISTER IS, AK ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot, aircraft N4882U; age 23; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 1,000 total, 30 in this make and model, 30 in the last 90 days, 30 in the last 30 days, 3 in the last 24 hours - Pilot, aircraft N353EH; age 45; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: helicopter, airplane; medical: class 2, unknown; seat: right; toxicology performed; flight hours: 15,287 total, 337 in this make and model, 248 in the last 90 days, 90 in the last 30 days, 4 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 150° at 8 knots - Visibility: 25 statute miles - Lowest ceiling: 6,000 ft broken - Temperature: 52 °F, dew point 39 °F - Altimeter: 29.00 inHg - Observed at: DLG ## 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 19880524015852A](https://openairdocs.org/incident/19880524015852A), May 24, 1988: Cessna U206G, Dillingham, AK, Destroyed, 1 fatal. Was struck in left side by N353EH while downwind for landing. Both fell to ground. No evasive action by pilots. - [Accident 19880524015851A](https://openairdocs.org/incident/19880524015851A), May 24, 1988: Snias AS350D, Dillingham, AK, Destroyed, 1 fatal. Flew into the side of N488WU that was on downwind in traffic pattern. Both fell to ground. No evasive action noted. 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.