# NTSB ATL00LA010: Cessna 310Q, N310GC, Jacksonville, FL, November 10, 1999 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: November 10, 1999, 17:30 local (22:30 UTC) - Place: Jacksonville, FL - Coordinates: 30.359985, -81.510902 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=30.3600&lon=-81.5109&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report November 30, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 47739 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL00LA010 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/47739/pdf - Page: https://openairdocs.org/ntsb/ATL00LA010 ## Probable cause The failure of the left main landing gear down locking mechanism for undetermined reasons. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Gear collapsed, taxi - landing gear,gear locking mechanism - failure (cause) - reason for occurrence undetermined (cause) ## Analysis The pilot had completed a local personal flight and was on taxiway 'C,' and was returning to the parking ramp, when without warning the left main landing gear collapsed. Examination of the airplane and the landing gear assembly showed that the left main landing gear down-lock end fitting assembly and the retention bolt had broken. The landing gear examination of the locking linkage failed to establish installation specification prior to the accident. A visual examination of the failed bolt assembly also failed to disclose pre-existing cracking in the bolt structure. A review of the maintenance logbooks revealed that recent maintenance had been performed on the landing gear assembly 18 hours before the accident. ## Factual narrative On November 10, 1999, at 1730 eastern standard time, a Cessna 310Q, N310GC, collided with the taxiway after the landing gear down-lock bolt failed at Craig Field in Jacksonville, Florida. The personal flight was operated by the pilot under the provisions of Title 14 CFR Part 91 with no flight plan filed. Visual weather conditions prevailed at the time of the accident. The airplane sustained substantial damage, and the private pilot was not injured. The flight departed Jacksonville, Florida, at 1635. The pilot had completed a local personal flight and was on taxiway "C," returning to the parking ramp, when without warning the left main landing gear collapsed. Examination of the airplane and the landing gear assembly showed that the left main landing gear down-lock end fitting assembly and the retention bolt had broken. The landing gear examination of the locking linkage failed to establish installation specification prior to the accident. A visual examination of the failed bolt assembly also failed to disclose pre-existing cracking in the bolt structure. A review of the maintenance logbooks revealed that recent maintenance had been performed on the landing gear assembly 18 hours before the accident. ## Aircraft - Registration: [N310GC](https://openairdocs.org/aircraft/N310GC), registered now, S/N 310Q0838, built 1973 (OpenAirDocs) - Reported make and model: Cessna 310Q - Registry model: [Cessna T310Q](https://openairdocs.org/model/cessna-t310q) (registry code 2074244) (OpenAirDocs) - Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 310Q-838 - Airframe hours: 4100 - Engines: Continental TIO-520-MB 310 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Robert J. Kleinhans - Airworthiness certificate: Standard, Normal - Last inspection: Annual, August 31, 1999, 10 hours before - Departed: CRG - Airport: CRG, Craig Airport, runway 5, 4,000 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 50; airline transport, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 4,500 total, 200 in this make and model, 75 in the last 90 days ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 66 °F, dew point 61 °F - Altimeter: 30.00 inHg - Observed at: CRG ## 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 19991110043339A](https://openairdocs.org/incident/19991110043339A), Nov 10, 1999: Cessna T310Q, Jacksonville, FL, Substantial damage. (.4)The pilot had completed a local personal flight and was on taxiway 'c,' and was returning to the parking ramp, when without warning the left main landing… 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.