# NTSB SEA06LA003: Beech B-60, N924GF, Arlington, WA, October 1, 2005 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: October 1, 2005, 12:30 local (19:30 UTC) - Place: Arlington, WA - Coordinates: 48.160831, -122.158889 - Nearby events: https://openairdocs.org/map.md?lat=48.1608&lon=-122.1589&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report May 30, 2006 - Report: Approved by Office Director - Parties: FAA FSDO - NTSB case key (mKey): 62604 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA06LA003 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/62604/pdf - Page: https://openairdocs.org/ntsb/SEA06LA003 ## Probable cause Main landing gear collapse during the landing rollout for undetermined reasons. ## Analysis In a written statement the pilot reported that he lowered the landing gear before entering the downwind to runway 34. He reported that after the landing, during the rollout, the landing gear "collapsed and the airplane slid to a stop." A witness reported that the airplane's left wing "dropped" during landing and he heard what was described as the airplane's engines power up, followed by a rapid deceleration of the airplane's engines. The witness reported that as the engines decelerated, the airplane settled to the ground eventually coming to rest on its belly. Examination of the airplane's main landing gear system showed that the main landing gear assembly was whole and intact. The forward and aft attach fittings (both left and right) were undamaged and no deformation to the immediate area of the attach points was noted. The outboard landing gear doors were intact and remained attached at their respective mounting points. Nominal damage was noted to the outboard gear door assemblies. The inboard landing gear doors remained attached to the wing assembly; however, both sustained extensive damage. Erosion type damage, to include longitudinal striations, was noted to both doors. Extensive damage was noted to the distal ends of both inboard doors. The outboard section of the left inboard gear door was bent, approximately 45 degrees, in the direction of the gear hinge. The outboard section of the right inboard gear door was curled inboard, opposite the direction of the hinge. The airplane's retractable courtesy step, which actuates simultaneously with the landing gear, was observed in the down and locked position. No damage was noted to the courtesy step assembly. The operator reported that with the exception of a leaking landing gear strut (left) there were no mechanical malfunctions or failures with the airplane prior to the accident. ## Factual narrative On October 1, 2005, at 1230 Pacific daylight time, a twin engine Beech B-60 (Duke), N924GF, sustained substantial damage following a landing gear collapse during the landing rollout at Arlington Municipal Airport, Arlington, Washington. The airplane, which is registered to Precision Approach Management, LLC, was being operated as a visual flight rules (VFR) cross-country flight under the provisions of Title 14, CFR Part 91, when the accident occurred. The airline transport pilot, the sole occupant of the airplane, was not injured. Visual meteorological conditions prevailed for the cross-country flight that originated at Bellingham, Washington, approximately 30 minutes prior to the accident. In a written statement dated October 11, the pilot reported that he lowered the landing gear before entering the downwind to runway 34. He reported that after the landing, during the rollout, that the landing gear "collapsed and the airplane slid to a stop." A witness reported that the airplane's left wing "dropped" during landing and he heard what was described as the airplane's engines power up, followed by a rapid deceleration of the airplane's engines. The witness reported that as the engines decelerated, the airplane settled to the ground eventually coming to rest on its belly. Airport maintenance personnel reported that the airplane come to rest approximately 3,400 feet beyond the threshold of runway 34, adjacent to the alpha three taxiway. Propeller slashes were observed on the runway surface in three separate locations. The first grouping of slash marks was noted approximately 1,280 feet beyond the landing threshold of runway 34. The second grouping of slash marks (approximately 246 feet in length) was noted approximately 1,720 feet beyond the landing threshold. The third set of slash marks was noted approximately 843 feet south of the wreckage and continued to the point where the airplane came to rest. On February 7, 2006, the NTSB IIC examined the airplane's main landing gear system at the operator's hangar facility in Arlington, Washington. The main landing gear assembly was whole and intact. The forward and aft attach fittings (both left and right) were undamaged and no deformation to the immediate area of the attach points was noted. The outboard landing gear doors were intact and remained attached at their respective mounting points. Nominal damage was noted to the outboard gear door assemblies. The inboard landing gear doors remained attached to the wing assembly, however, both sustained extensive damage. Erosion type damage, to include longitudinal striations, was noted to both doors. Extensive damage was noted to the distal ends of both inboard doors. The outboard section of the left inboard gear door was bent, approximately 45 degrees, in the direction of the gear hinge. The outboard section of the right inboard gear door was curled inboard, opposite the direction of the hinge. The airplane's retractable courtesy step, which actuates simultaneously with the landing gear, was observed in the down and locked position. No damage was noted to the courtesy step assembly. Further examination of the landing gear system revealed bending type deformation to the right side landing gear retraction rod and inboard landing gear door retraction rod. No damage was noted to the left side retraction rods. The operator reported that with the exception of a leaking landing gear strut (left) there were no mechanical malfunctions or failures with the airplane prior to the accident. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Gear collapsed, landing - landing gear,main gear - collapsed (cause) ## Aircraft - Registration: [N924GF](https://openairdocs.org/deregistered/N924GF-2017-03-21), registration cancelled 2017-03-21, S/N P-435, built 1977 (OpenAirDocs) - Reported make and model: Beech B-60 - Registry model: [Beech B-60](https://openairdocs.org/model/beech-b-60) (registry code 1153605) (OpenAirDocs) - Registry engine: [Lycoming TI0-541 series](https://openairdocs.org/engine/lycoming-ti0-541-series) (registry code 41536, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 435 - Airframe hours: 1935 - Engines: Lycoming TSIO-541 380 horsepower reciprocating; Lycoming TSIO-541 380 horsepower reciprocating - Damage: Substantial damage - Flight: Part 91 - Registered owner: Precision Approach Management LLC - Airworthiness certificate: Standard, Normal - Last inspection: Annual, April 1, 2005, 18 hours before - Departed: BLI, BELLINGHAM, WA - Destination: AWO, Arlington, WA - Airport: AWO, Arlington Muni, runway 34, 5,333 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 71; injuries: none; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review August 1, 2005; seat: left; flight hours: 10,340 total, 15 in this make and model, 8,420 as pilot in command, 12 in the last 90 days, 7 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none ## 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 20051001023549A](https://openairdocs.org/incident/20051001023549A), Oct 1, 2005: Beech B60, Arlington, WA, Substantial damage. (-23) On October 1, 2005 at 1210PM a twin engine Beech B-60, duke, N924GF, sustained substantial damage following a gear up landing on runway 34 at Arlington… 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.