# NTSB GAA16CA519: Beech G35, N168B, Kooskia, ID, September 16, 2016 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: September 16, 2016, 14:00 local (21:00 UTC) - Place: Kooskia, ID - Coordinates: 45.989444, -114.841392 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=45.9894&lon=-114.8414&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Landing gear not configured](https://openairdocs.org/ntsb-events/095) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report April 10, 2017 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 94110 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA16CA519 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/94110/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=94110 - Page: https://openairdocs.org/ntsb/GAA16CA519 ## Probable cause The pilot’s failure to extend the landing gear during landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Use of equip/info: use of equip/system](https://openairdocs.org/ntsb-findings/02063015): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Beech G35, 3 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md?model=1151516), [All aircraft, 1,391 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md) - [Action: forgotten action/omission](https://openairdocs.org/ntsb-findings/02041035): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Beech G35, 3 cases](https://openairdocs.org/ntsb-findings/02041035/cases.md?model=1151516), [All aircraft, 440 cases](https://openairdocs.org/ntsb-findings/02041035/cases.md) - [Landing gear system: gear extension and retract sys](https://openairdocs.org/ntsb-findings/01023230): Aircraft › Aircraft systems · Not used/operated (probable cause); cases with it: [Beech G35, 2 cases](https://openairdocs.org/ntsb-findings/01023230/cases.md?model=1151516), [All aircraft, 416 cases](https://openairdocs.org/ntsb-findings/01023230/cases.md) - [Use of equip/info: use of checklist](https://openairdocs.org/ntsb-findings/02063030): Personnel issues › Task performance · Pilot; cases with it: [Beech G35, 2 cases](https://openairdocs.org/ntsb-findings/02063030/cases.md?model=1151516), [All aircraft, 336 cases](https://openairdocs.org/ntsb-findings/02063030/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Landing gear not configured](https://openairdocs.org/ntsb-events/095) (defining event); cases with it: [Beech G35, 4 cases](https://openairdocs.org/ntsb-events/095/sequence.md?model=1151516), [All aircraft, 584 cases](https://openairdocs.org/ntsb-events/095/sequence.md) - [Landing-landing roll: Abnormal runway contact](https://openairdocs.org/ntsb-events/090); cases with it: [Beech G35, 3 cases](https://openairdocs.org/ntsb-events/090/sequence.md?model=1151516), [All aircraft, 1,506 cases](https://openairdocs.org/ntsb-events/090/sequence.md) - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230); cases with it: [Beech G35, 2 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=1151516), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) ## Analysis According to the pilot of the retractable landing gear airplane, his normal approach to the backcountry grass airstrip was to follow the terrain until established on a "5-10 second" final approach. The pilot recalled that there was a 5-knot tailwind at the airstrip during the approach. On final, he increased the flaps, the airspeed was 70 knots, and the airplane touched down on the approach end of the runway. He reported that he did not extend the retractable landing gear and that, following the touchdown, the airplane slid about 1,000 ft down the runway. The airplane sustained substantial damage to the fuselage longerons and the firewall. The pilot reported that there were no mechanical failures or anomalies with the airframe or engine that would have prevented normal operation. ## Factual narrative According to the pilot in the retractable landing gear airplane, his normal approach to the backcountry grass airstrip was to follow the terrain until established on a "5-10 second" final approach. The pilot recalled that there was a five-knot tailwind at the airstrip during the approach. On final, he increased the flaps, the airspeed was 70 knots, and the airplane touched down on the approach end of the runway. However, he reported that he did not extend the retractable landing gear and following the touch down, the airplane slid about 1,000 feet down the runway. The airplane sustained substantial damage to the fuselage longerons and the firewall. The pilot reported that there were no mechanical failures or anomalies with the airframe or engine, that would have prevented normal operation. ## Aircraft - Registration: [N168B](https://openairdocs.org/deregistered/N168B-2019-01-14), registration cancelled 2019-01-14, S/N D-4453, built 1956 (OpenAirDocs) - Reported make and model: BEECH G35 (NO SERIES) - Registry model: [Beech G35](https://openairdocs.org/model/beech-g35) (registry code 1151516) (OpenAirDocs) - Registry engine: [Continental E225 series](https://openairdocs.org/engine/continental-e225-series) (registry code 17015, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: D-4453 - Year built: 1956 - Engines: Continental IO-550-B 300 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, June 24, 2016 - Departed: 1U1, Moose Creek, ID - Destination: 2U5, Kooskia, ID - Airport: 2U5, Shearer /Usfs/, runway 18, 2,000 × 15 ft, grass/turf - Equipment: Stall warning system, Auto-pilot, Electronic flight bag or handheld device, Handheld GPS ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 71; injuries: none; flight instructor, commercial; airplane ratings: single-engine land, single-engine sea; instrument ratings: airplane; medical: class 3, waiver time limited special; last flight review February 21, 2015; seat: left; restraint: 3-point; flight hours: 7,997.5 total, 4,546.8 in this make and model, 7,714.5 as pilot in command, 69.6 in the last 90 days, 20.8 in the last 30 days, 6.5 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 180° at 3 knots - Temperature: 82 °F, dew point 43 °F - Altimeter: 30.00 inHg - Observed at: KP69, 33 nm away ## 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 20160916018719A](https://openairdocs.org/incident/20160916018719A), Sep 16, 2016: Beech G35, Substantial damage. Departed Shearer and landed at moose creek (1U1) for voluntary forest service maintenance. On return flight later in the day, failed to extend the landing gear… ## Other investigations on N168B (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 SEA02LA043](https://openairdocs.org/ntsb/SEA02LA043), Feb 26, 2002: Beech G35 (N168B), Anacortes, WA, substantial damage. Probable cause: The pilot's inadvertent failure to lower the landing gear prior to touchdown. ## Docket (2 files) The files NTSB released with the investigation on March 23, 2017, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=94110. 2.4 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 2.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40450188&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Photo (Courtesy of FAA) (item 2, .PDF, 1 photo, 268 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40450189&FileExtension=.PDF&FileName=Photo%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.