# NTSB ANC12CA041: Dehavilland DHC-2 MK. I(L20A), N323KT, Talkeetna, AK, May 22, 2012 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: May 22, 2012, 14:12 local (22:12 UTC) - Place: Talkeetna, AK - Coordinates: 69.22013, -146.790176 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=69.2201&lon=-146.7902&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 5 uninjured - Status: Completed, report October 9, 2012 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - Parties: Federal Aviation Administration - NTSB case key (mKey): 83733 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC12CA041 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/83733/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=83733 - Page: https://openairdocs.org/ntsb/ANC12CA041 ## Probable cause The pilot inadvertently landed with the parking brake set. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Action: forgotten action/omission](https://openairdocs.org/ntsb-findings/02041035): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Dehavilland DHC-2 MK. I(L20A), 1 case](https://openairdocs.org/ntsb-findings/02041035/cases.md?model=2808002), [All aircraft, 440 cases](https://openairdocs.org/ntsb-findings/02041035/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Dehavilland DHC-2 MK. I(L20A), 8 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2808002), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Landing gear system: brake](https://openairdocs.org/ntsb-findings/01023242): Aircraft › Aircraft systems · Unintentional use/operation (probable cause); cases with it: [Dehavilland DHC-2 MK. I(L20A), 2 cases](https://openairdocs.org/ntsb-findings/01023242/cases.md?model=2808002), [All aircraft, 297 cases](https://openairdocs.org/ntsb-findings/01023242/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: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Dehavilland DHC-2 MK. I(L20A), 6 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2808002), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Dehavilland DHC-2 MK. I(L20A), 4 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=2808002), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The pilot landed at a base camp on a glacier. To prevent the airplane from sliding, he raised the wheel skis and set the parking brake. Upon departure, he lowered the skis but forgot to release the parking brake. Upon touchdown on a hard surfaced runway, the airplane came to an abrupt stop and nosed down, then settled back on the tailwheel. The horizontal stabilizer sustained substantial damage. The pilot indicated there were no preaccident mechanical anomalies with the airplane. He said the accident could have been prevented if he had ensured that the parking brake was not set on the glacier, which would have prevented an abrupt stop when he later landed on wheels. ## Factual narrative The pilot landed at a base camp on a glacier. To prevent the airplane from sliding, he raised the wheel skis and set the parking brake. He lowered the skis and departed the glacier, forgetting to release the parking brake. Upon touchdown on a hard surfaced runway, the airplane came to an abrupt stop and nosed down, then settled back on the tailwheel. The horizontal stabilizer sustained substantial damage. The pilot indicated there were no preaccident mechanical anomalies with the airplane. ## Aircraft - Registration: [N323KT](https://openairdocs.org/deregistered/N323KT-2019-03-18), registration cancelled 2019-03-18, S/N 1022, built 1957 (OpenAirDocs) - Reported make and model: DEHAVILLAND DHC-2 MK. I(L20A) - Registry model: [Dehavilland DHC-2 MK. I(L20A)](https://openairdocs.org/model/dehavilland-dhc-2-mk-i-l20a) (registry code 2808002) (OpenAirDocs) - Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 1022 - Airframe hours: 12824 - Engines: P&W R-985 SERIES 450 horsepower reciprocating - Damage: Substantial damage - Flight: Part 135 - Operator: Rust Properties LLC, doing business as K2 Aviation - Registered owner: Rust Properties LLC - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, April 4, 2012, 7 hours before - Departed: KahiltnaGlacier, AK - Destination: PATK, Talkeetna, AK - Flight plan: VFR - Airport: PATK, Talkeetna, runway 36, 3,500 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 60; injuries: none; commercial; airplane ratings: single-engine sea, single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review June 10, 2011; seat: left; flight hours: 6,631 total, 944 in this make and model, 6,591 as pilot in command, 35 in the last 90 days, 35 in the last 30 days, 7 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 340° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 63 °F, dew point 32 °F - Altimeter: 29.54 inHg - Observed at: PATK ## Other investigations on N323KT (3) 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 ANC18FA063](https://openairdocs.org/ntsb/ANC18FA063), Aug 5, 2018: De Havilland DHC-2 (N323KT), Talkeetna, AK, substantial damage, 5 fatal. Probable cause: Impact with terrain for reasons that could not be determined because the airplane was not recovered due to the inaccessible nature of the accident site. - [NTSB ANC08CA066](https://openairdocs.org/ntsb/ANC08CA066), May 11, 2008: de Havilland DHC-2 (N323KT), Talkeetna, AK, substantial damage. Probable cause: The pilot's inadvertent activation of the main landing gear brakes during the recovery from a bounced landing. - [NTSB ANC08CA034](https://openairdocs.org/ntsb/ANC08CA034), Feb 5, 2008: de Havilland DHC-2 (N323KT), McGrath, AK, substantial damage. Probable cause: The pilot's failure to maintain directional control of the airplane during an aborted takeoff. ## Docket (1 files) The files NTSB released with the investigation on July 27, 2012, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=83733. 5.7 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 5.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40372804&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.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.