# NTSB ANC01LA010: Beech BE-A36, N1820L, Nondalton, AK, October 12, 2000 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: October 12, 2000, 13:45 local (21:45 UTC) - Place: Nondalton, AK - Coordinates: 59.959991, -154.870315 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=59.9600&lon=-154.8703&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report November 6, 2001 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 51016 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC01LA010 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/51016/pdf - Page: https://openairdocs.org/ntsb/ANC01LA010 ## Probable cause The pilot's inadvertent retraction of the landing gear during the landing roll. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Gear retraction on ground, landing - roll - gear retraction - inadvertent activation, pilot in command (cause) ## Analysis The airline transport certificated pilot was positioning the airplane to begin an on-demand charter flight. During the landing roll at the destination airport, the landing gear collapsed. The director of operations stated that the pilot intended to raise the flaps, but inadvertently raised the landing gear handle. The airplane received damage to the propeller, landing gear doors, the lower portion of the nose cowling, and the right wingtip. Additionally, the left and right butt ribs, positioned inboard and longitudinally along the landing gear wheel wells, were buckled. The right butt rib had a vertical tear in the metal structure. The director of operations said that when he landed to inspect the airplane, he noted that the landing gear handle was in the 'UP' position. ## Factual narrative On October 12, 2000, about 1345 Alaska daylight time, a Beech BE-A36 airplane, N1820L, sustained substantial damage during the landing roll at the Nondalton Airport, Nondalton, Alaska. The airplane was being operated as a visual flight rules (VFR) positioning flight under Title 14, CFR Part 91, when the accident occurred. The airplane was operated by Lake Clark Air Inc., Port Alsworth, Alaska. The airline transport certificated pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed. VFR company flight following procedures were in effect. The flight originated at Port Aslworth at 1335. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on October 12, 2000, the director of operations for the operator reported the pilot was positioning the airplane to begin an on-demand charter flight. The pilot landed on runway 20 at Nondalton, and during the landing roll, the landing gear collapsed. The director of operations stated that the pilot intended to raise the flaps, but inadvertently raised the landing gear handle. The airplane received damage to the propeller, landing gear doors, the lower portion of the nose cowling, and the right wingtip. Additionally, the left and right butt ribs, positioned inboard and longitudinally along the landing gear wheel wells, were buckled. The right butt rib had a vertical tear in the metal structure. The director of operations said that when he landed at Nondalton to inspect the airplane, he noted that the landing gear handle was in the "UP" position. ## Aircraft - Registration: [N1820L](https://openairdocs.org/aircraft/N1820L), registered now, S/N E-843, built 1976 (OpenAirDocs) - Reported make and model: Beech BE-A36 - Registry model: [Beech A36](https://openairdocs.org/model/beech-a36) (registry code 1151604) (OpenAirDocs) - Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: E-843 - Airframe hours: 11549 - Engines: Continental IO-520-BA 285 horsepower reciprocating - Damage: Substantial damage - Flight: Positioning, Part 91 - Operator: Lake Clark Air Inc. - Registered owner: Glen R. Alsworth - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, October 6, 2000, 9 hours before - Departed: PORT ALSWORTH, AK - Destination: 5NN - Flight plan: Company VFR - Airport: 5NN, Nondalton, runway 20, 3,400 × 75 ft, gravel ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 42; commercial, airline transport; airplane ratings: multi-engine land, single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 7,550 total, 800 in this make and model, 7,400 as pilot in command, 500 in the last 90 days, 150 in the last 30 days, 5 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 180° at 5 knots - Visibility: 30 statute miles - Lowest ceiling: none - Temperature: 34 °F - Altimeter: 29.00 inHg ## 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 20001012041739A](https://openairdocs.org/incident/20001012041739A), Oct 12, 2000: Beech A36, Nondalton, AK, Substantial damage. (-23) On October 12, 2000, at about 1345 local time, a wheel equipped retractable gear, BE-36-A36 airplane, N1820L, sustained substantial damage during landing… ## Other investigations on N1820L (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 ANC21LA027](https://openairdocs.org/ntsb/ANC21LA027), Mar 20, 2021: Beech A36 (N1820L), Port Alsworth, AK, substantial damage. Probable cause: The pilot's misidentification of the airport’s active runway, which resulted in an off runway landing and a collision with a snow berm. Contributing to the accident was the runway’s lack of… - [NTSB ANC13CA038](https://openairdocs.org/ntsb/ANC13CA038), Apr 15, 2013: Beech A36 (N1820L), Port Alsworth, AK, substantial damage. Probable cause: The failure of the left main landing gear retraction brace assembly, resulting in the collapse of the left main landing gear. - [NTSB ANC98LA159](https://openairdocs.org/ntsb/ANC98LA159), Sep 26, 1998: Beech A36 (N1820L), New Stuyahok, AK, substantial damage. Probable cause: The pilot's failure to extend the landing gear prior to landing. Factors associated with this accident were the pilot's interference with his normal habit pattern, turbulence, and the crosswind… 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.