# NTSB ANC01LA081: Lockheed L-382G, N401LC, Lake Minchumina, AK, July 2, 2001 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: July 2, 2001, 08:50 local (16:50 UTC) - Place: Lake Minchumina, AK - Coordinates: 61.860149, -157.990371 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=61.8601&lon=-157.9904&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report June 3, 2002 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - Parties: Federal Aviation Administration - NTSB case key (mKey): 52632 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC01LA081 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/52632/pdf - Page: https://openairdocs.org/ntsb/ANC01LA081 ## Probable cause The flight crew's improper recovery from a bounced landing. Factors associated with the accident were the selection of an unsuitable landing area, and a rough/uneven landing surface. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Dragged wing,rotor,pod,float or tail/skid, landing - flare/touchdown - unsuitable terrain or takeoff/landing/taxi area - selected, flightcrew (contributing factor) - terrain condition - rough/uneven (contributing factor) - recovery from bounced landing - improper, flightcrew (cause) ## Analysis The crew of the arriving cargo flight flew over the airport to inspect the runway conditions, and subsequently elected to use runway 20, a 4,200 feet long, 90 feet wide, gravel runway. The crew noted that the runway surface had a number of frost-heaves that had developed during the past winter. During the initial landing touchdown, the airplane "skipped" as the main wheels touched on the crest of one of the frost-heaves. The airplane became airborne, floated slightly, touched again about 750 feet beyond the approach end of the runway. During the second landing flare, the main landing gear wheels touched on the downhill side of a second frost-heave, which allowed the tail of the airplane to contact the gravel runway. The captain characterized the second touchdown as within acceptable limits, but with a slightly nose high attitude. A postflight inspection by the crew discovered a 4 feet by 2 feet puncture on the belly of the airplane, just forward of the main cargo door. ## Factual narrative On July 2, 2001, about 0850 Alaska daylight time, a Lockheed L-382G airplane, N401LC, sustained substantial damage during landing at the Lake Minchumina Airport, Lake Minchumina, Alaska. The airplane was being operated as an instrument (IFR) cross-country cargo flight under Title 14 CFR Part 121, when the accident occurred. The airplane was registered to, and operated by Lynden Air Cargo LLC. The crew of the airplane, consisting of the captain, first officer, flight engineer, and a load master, were not injured. Visual meteorological conditions prevailed, and an IFR flight plan was filed. The flight originated at the Ted Stevens International Airport, Anchorage, Alaska, about 0800. During a telephone conversation with the National Transportation Safety Board investigator-in-charge on July 2, the director of operations for the operator reported the airport has a gravel runway that is oriented on a 020/200 degree heading. He added that the captain flew over the airport to inspect the runway conditions, and subsequently elected to use runway 20. He said that the runway is 4,200 feet long, 90 feet wide, and that the gravel runway had a number of frost-heaves that have developed during the past winter. The director of operations said that the captain was making an approach to runway 20, and on initial touchdown the airplane "skipped" as the main wheels touched down on the crest of one of the frost-heaves. He said that the airplane became airborne, floated slightly, and then touched down about 750 feet beyond the approach end of the runway. During the second landing flare, the main landing gear wheels touched on the downhill side of a second frost-heave, which allowed the tail of the airplane to contact the gravel runway. The captain characterized the second touchdown as within acceptable limits, but with a slightly nose high attitude. After touchdown, the captain lowered the nose of the airplane, brought the engines into reverse, and completed the landing. After landing rollout, the airplane was taxied to parking. A postflight inspection by the crew discovered a 4 feet by 2 feet puncture on the belly of the airplane, just forward of the main cargo door. ## Aircraft - Registration: [N401LC](https://openairdocs.org/aircraft/N401LC), registered now, S/N 4606, built 1975 (OpenAirDocs) - Reported make and model: Lockheed L-382G - Registry model: [Lockheed 382G-44K-30](https://openairdocs.org/model/lockheed-382g-44k-30) (registry code 526414Z) (OpenAirDocs) - Registry engine: [Allison 501-D22A](https://openairdocs.org/engine/allison-501-d22a) (registry code 03006, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: 4606 - Airframe hours: 31652.8 - Engines: Allison 501-D22A 4368 horsepower turbo prop - Damage: Substantial damage - Flight: Part 121 - Registered owner: Lynden Air Cargo LLC - Airworthiness certificate: Standard, Normal - Last inspection: Continuous airworthiness, April 10, 2001, 285.7 hours before - Departed: ANC, Anchorage, AK - Destination: MHM, Lake Minchumina, AK - Flight plan: IFR - Airport: MHM, Minchumina, runway 20, 4,200 × 90 ft, gravel ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 37; injuries: none; airline transport; airplane ratings: single-engine sea, single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; last flight review January 31, 2001; seat: left; flight hours: 15,000 total, 2,200 in this make and model, 11,000 as pilot in command, 200 in the last 90 days, 70 in the last 30 days, 7 in the last 24 hours - Co-pilot; injuries: none - Flight engineer; injuries: none - Other flight crew; injuries: none ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 55 °F, dew point 46 °F - Altimeter: 30.14 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 20010702017079A](https://openairdocs.org/incident/20010702017079A), Jul 2, 2001: Lkheed 382G, Minchumina, AK, No damage. (-23) Captain was landing on a 4,200 feet long, 90 feet wide, gravel runway. The runway had a number of frost-heaves that had developed during the past winter.… ## Other investigations on N401LC (2) 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 DCA16LA096](https://openairdocs.org/ntsb/DCA16LA096), Feb 12, 2016: Lockheed 382G (N401LC), Iliamna, AK, substantial damage. Probable cause: The fatigue failure of the forward pressure bulkhead canted web that originated from stress corrosion cracking areas. Contributing to the failure were inspection procedures and intervals inadequate… - [NTSB ANC07LA067](https://openairdocs.org/ntsb/ANC07LA067), Jul 19, 2007: Lockheed 382G-44K-30 (N401LC), McGrath, AK, substantial damage. Probable cause: The pilot's excessive rotation of the airplane during takeoff, which resulted in dragging the tail on the runway and substantial damage. 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.