# NTSB GAA16CA455: Cessna U206, N8076Z, Sleetmute, AK, August 17, 2016 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: August 17, 2016, 11:30 local (19:30 UTC) - Place: Sleetmute, AK - Coordinates: 61.705276, -157.150283 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=61.7053&lon=-157.1503&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Hard landing](https://openairdocs.org/ntsb-events/092) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report December 5, 2016 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 93912 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA16CA455 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/93912/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=93912 - Page: https://openairdocs.org/ntsb/GAA16CA455 ## Probable cause The pilot's exceedance of the critical angle of attack during the landing flare, which resulted in an aerodynamic stall and a hard landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Cessna U206A, 3 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2073316), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Performance/control parameters: angle of attack](https://openairdocs.org/ntsb-findings/01062042): Aircraft › Aircraft oper/perf/capability · Capability exceeded (probable cause); cases with it: [Cessna U206A, 1 case](https://openairdocs.org/ntsb-findings/01062042/cases.md?model=2073316), [All aircraft, 990 cases](https://openairdocs.org/ntsb-findings/01062042/cases.md) - [Terrain](https://openairdocs.org/ntsb-findings/03021000): Environmental issues › Physical environment · Contributed to outcome; cases with it: [Cessna U206A, 1 case](https://openairdocs.org/ntsb-findings/03021000/cases.md?model=2073316), [All aircraft, 267 cases](https://openairdocs.org/ntsb-findings/03021000/cases.md) - [Runway/land/takeoff/taxi surface](https://openairdocs.org/ntsb-findings/03023000): Environmental issues › Physical environment · Contributed to outcome; cases with it: [Cessna U206A, 1 case](https://openairdocs.org/ntsb-findings/03023000/cases.md?model=2073316), [All aircraft, 253 cases](https://openairdocs.org/ntsb-findings/03023000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-flare/touchdown: Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241); cases with it: [Cessna U206A, 1 case](https://openairdocs.org/ntsb-events/241/sequence.md?model=2073316), [All aircraft, 1,529 cases](https://openairdocs.org/ntsb-events/241/sequence.md) - [Landing-flare/touchdown: Hard landing](https://openairdocs.org/ntsb-events/092) (defining event); cases with it: [Cessna U206A, 1 case](https://openairdocs.org/ntsb-events/092/sequence.md?model=2073316), [All aircraft, 2,102 cases](https://openairdocs.org/ntsb-events/092/sequence.md) ## Analysis The pilot reported that during the landing flare at an unpublished dirt airstrip, he entered a "low level [aerodynamic] stall." He further reported that due to the aerodynamic stall, and a "small rise" on the runway, the airplane touched down hard. During the landing roll, the pilot reported that the fuel "belly tank" installed under the fuselage separated from the airplane and the fuselage sustained substantial damaged. The pilot did not report any mechanical malfunction or failure with the airplane that would have precluded normal operation. ## Factual narrative The pilot reported that during the landing flare at an unpublished dirt airstrip, he entered a "low level [aerodynamic] stall." He further reported that due to the aerodynamic stall, and a "small rise" on the runway, the airplane touched down hard. During the landing roll, the pilot reported that the fuel "belly tank" installed under the fuselage separated from the airplane and the fuselage sustained substantial damaged. The pilot did not report any mechanical malfunction or failure with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N8076Z](https://openairdocs.org/aircraft/N8076Z), registered now, S/N U206-0476, built 1965 (OpenAirDocs) - Reported make and model: CESSNA U206 (A) - Registry model: [Cessna U206A](https://openairdocs.org/model/cessna-u206a) (registry code 2073316) (OpenAirDocs) - Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: U206-0476 - Year built: 1965 - Engines: Continental IO-520-F 300 hp reciprocating - Damage: Substantial damage - Flight: Business, Part 91 - Airworthiness certificate: Special, Restricted (Special); Standard, Normal - Last inspection: Annual, April 12, 2016 - Departed: SLQ, SLEETMUTE, AK - Destination: NONE, Sleetmute, AK - Flight plan: Company VFR - Airport: NONE, Alaska Adventures Airstrip, runway NONE, 2,200 × 100 ft, dirt - Equipment: Electronic flight bag or handheld device, Handheld GPS, Stall warning system ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 67; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review January 20, 2015; seat: left; restraint: 3-point; flight hours: 6,831 total, 6,295 in this make and model, 6,790 as pilot in command, 150 in the last 90 days, 50 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 240° at 3 knots - Visibility: 5 statute miles - Lowest ceiling: none - Temperature: 63 °F, dew point 54 °F - Altimeter: 30.20 inHg - Observed at: PASL ## 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 20160817014529A](https://openairdocs.org/incident/20160817014529A), Aug 17, 2016: Cessna U206A, Sleetmute, AK, Substantial damage. While performing a landing at a remote grass airstrip, the aircraft experienced a hard landing that ripped the external belly fuel tank from aircraft and… ## Other investigations on N8076Z (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 ANC93LA038](https://openairdocs.org/ntsb/ANC93LA038), Feb 28, 1993: Cessna U206A (N8076Z), Willow, AK, substantial damage. Probable cause: THE ABRUPT AIRCRAFT HANDLING BY THE PILOT IN COMMAND. FACTORS WERE THE COLLAPSE OF THE NOSE GEAR AND THE SOFT, SNOW COVERED TERRAIN. ## Docket (2 files) The files NTSB released with the investigation on October 6, 2016, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=93912. 1.0 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 824 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40445122&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Accident Photo (Courtesy of FAA) (item 2, .PDF, 1 photo, 179 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40445123&FileExtension=.PDF&FileName=Accident%20Photo%20(Courtesy%20of%20FAA)-Master.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.