# NTSB ANC21LA066: Cessna U206F, N9608G, Igiugig, AK, August 2, 2021 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Class 4 · Limited · Final report - Date: August 1, 2021, 16:45 local (Aug 2, 2021, 00:45 UTC) - Place: Igiugig, AK - Coordinates: 59.12105, -155.4005 - Nearby events: https://openairdocs.org/map.md?lat=59.1210&lon=-155.4005&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff: Runway excursion](https://openairdocs.org/ntsb-events/300) - Highest injury: Minor injuries - Injuries: 3 minor, 1 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Alaska Regional Office - Parties: FAA - NTSB case key (mKey): 103604 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC21LA066 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/103604/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=103604 - Page: https://openairdocs.org/ntsb/ANC21LA066 ## Probable cause The pilot’s improper decision to continue a takeoff attempt when it became evident that the airplane would not become airborne before reaching the departure end shoreline. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Cessna U206F, 8 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=2073333), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Takeoff: Runway excursion](https://openairdocs.org/ntsb-events/300) (defining event); cases with it: [Cessna U206F, 1 case](https://openairdocs.org/ntsb-events/300/sequence.md?model=2073333), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) ## Analysis The pilot was attempting a takeoff in a float-equipped airplane. He estimated the gross weight of the airplane to be about 300 lbs. under the maximum gross weight limitation. He stated that after seeing the shoreline get “uncomfortably closer,” he wondered why the airplane was not getting airborne. The airplane subsequently impacted the shore, nosed over, and came to rest inverted on the beach. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The FAA publication Seaplane, Skiplane, and Float/Ski Equipped Helicopter Operations Handbook (FAA-H-8083-23) states that for seaplanes, as weight increases, the floats sink deeper into the water, creating a significant amount of water drag force during initial acceleration that results in a longer takeoff run. ## Aircraft - Registration: [N9608G](https://openairdocs.org/aircraft/N9608G), registered now, S/N U20601808, built 1972 (OpenAirDocs) - Reported make and model: CESSNA U206F (NO SERIES) - Registry model: [Cessna U206F](https://openairdocs.org/model/cessna-u206f) (registry code 2073333) (OpenAirDocs) - Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: U20601808 - Year built: 1972 - Airframe hours: 13668.2 - Engines: CONT MOTOR IO 520 SERIES 285 horsepower reciprocating - Damage: Substantial damage - Flight: Other work use, Part 135 - Operator: Branch River Air Service Inc, doing business as Branch River Air - Registered owner: River Front Akn LLC - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, July 17, 2021, 66.1 hours before - Destination: PAKN, KING SALMON, AK - Equipment: Stall warning system, ADS-B, Electronic flight bag or handheld device, Handheld GPS ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 44; injuries: none; airline transport; airplane ratings: single-engine sea, multi-engine sea, single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review June 5, 2021; seat: left; restraint: 3-point; flight hours: 1,935 total, 250 in this make and model, 1,839 as pilot in command, 249 in the last 90 days, 128 in the last 30 days, 6.8 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 30° at 11 knots - Temperature: 63 °F, dew point 57 °F - Observed at: PAIG, 20 nm away - METAR: PAIG 020056Z AUTO 03011KT FEW050 SCT065 17/14 RMK AO2 SLPNO T01720139 PWINO $ ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20210801006769A](https://openairdocs.org/incident/20210801006769A), Aug 1, 2021: Cessna U206F, Igiugig, AK, Destroyed. [privacy data omitted], N9608G, C206, flipped over during takeoff from lake. 4 POB/1 serious, 3 unk, unknown damage, occ'd 7/31/2021 approx 1645AKDT. W-roc/dt… ## Other investigations on N9608G (1) 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. - [NTSB ANC96IA077](https://openairdocs.org/ntsb/ANC96IA077), Jun 1, 1996: Cessna 206 (N9608G), Kodiak, AK, incident, minor damage. Probable cause: The pilot's selection of unsuitable terrain for landing. Factors in the accident were: soft terrain, the use of an oversize nose wheel tire, and the FAA's inadequate field approval process for tundra… ## Docket (3 files) The files NTSB released with the investigation on November 12, 2021, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=103604. 3.8 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 3.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12577536&FileExtension=pdf&FileName=6120_Redacted-Rel.pdf - Record of conversation_PIC (item 2, PDF, 1 page, 207 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12577775&FileExtension=pdf&FileName=Record%20of%20Conversation%20-%20PIC-Rel.pdf - Photos (item 3, PDF, 1 page, 173 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=12577765&FileExtension=pdf&FileName=Photo%20Array-Rel.pdf 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.