# NTSB MIA98LA168: Gulfstream American 690C, N840V, Jacksonville, FL, May 26, 1998 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 25, 1998, 20:12 local (May 26, 1998, 00:12 UTC) - Place: Jacksonville, FL - Location: 30.4940° N, 81.6878° W: Placed by OpenAirDocs at JACKSONVILLE INTL (JAX), within about a mile (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=30.4940&lon=-81.6878&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report June 21, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 38525 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA98LA168 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/38525/pdf - Page: https://openairdocs.org/ntsb/MIA98LA168 ## Probable cause the left main landing gear failed to extend due to a jammed link assembly. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, approach - landing gear,gear locking mechanism - jammed - landing gear - locked (cause) - gear extension - not possible, pilot in command (cause) - In flight collision with terrain/water, landing - flare/touchdown - terrain condition - runway ## Analysis The flight was on the downwind leg for landing at St. Simons Island when the pilot noticed a gear warning. The pilot elected to divert to Jacksonville. The airplane landed gear up, and came to a stop on an unfoamed runway. An examination of the airplane's landing gear revealed that the left main landing gear failed to extend because the link assembly had jammed against the gear-down lock. It was reported by the FAA that the airplane had just undergone a 5-year landing gear inspection, 22 hours before the accident. ## Factual narrative On May 25, 1998, about 2012 eastern daylight time, a Gulfstream Commander 690C, N840V, registered to KV Oil and Gas Inc., crashed on landing at the Jacksonville International Airport, Jacksonville, Florida. Visual meteorological conditions prevailed and an IFR flight plan was filed. The commercial pilot and three passengers reported no injuries. The airplane sustained substantial damage. The flight originated from Stewart, Florida, at 1630. The flight was on the downwind leg for landing at St. Simons Island, Georgia, when the pilot noticed a gear warning that only two gears were down, and that the left main landing gear was still retracted. The pilot elected to divert to Jacksonville, and attempt a gear-up landing. Before diverting, he elected to climb to 7,000 feet to burn fuel, and talk to maintenance personnel at Jacksonville. The pilot cancelled his IFR clearance and flew VFR to Jacksonville. The airplane landed on its belly, and came to a stop on an unfoamed runway. Examination of the airplane's landing gear revealed that the left main landing gear failed to extend because the link assembly had jammed against the gear-down lock. It was reported by the FAA that the airplane had just undergone a 5-year landing gear inspection, 22 hours before the accident. ## Aircraft - Registration: [N840V](https://openairdocs.org/deregistered/N840V-2018-02-20), registration cancelled 2018-02-20, S/N 11727, built 1982 (OpenAirDocs) - Reported make and model: Gulfstream American 690C - Registry model: [Gulfstream AM Corp Comm Div 690C](https://openairdocs.org/model/gulfstream-am-corp-comm-div-690c) (registry code 3970404) (OpenAirDocs) - Registry engine: [AiResearch TPE331 series](https://openairdocs.org/engine/airesearch-tpe331-series) (registry code 01514, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: 11727 - Engines: Garrett TPE-331-5-254 718 horsepower turbo prop - Damage: Substantial damage - Flight: Business, Part 91 - Registered owner: Kv Oil & Gas Inc. - Airworthiness certificate: Standard, Normal - Departed: SUA, STUART, FL - Destination: SSI, ST SIMONS IS., GA - Flight plan: IFR - Airport: JAX, Jacksonville Int., runway 25, 10,000 × 150 ft, concrete ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 56; commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: helicopter, airplane; medical: class 2, unknown; seat: left; flight hours: 12,500 total, 621 in this make and model, 12,000 as pilot in command, 60 in the last 90 days, 30 in the last 30 days, 6 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 88 °F, dew point 70 °F - Altimeter: 29.00 inHg - Observed at: JAX ## 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 19980525015619A](https://openairdocs.org/incident/19980525015619A), May 25, 1998: Gulstm 690C, Jacksonville, FL, Substantial damage. On may 25, 1998, about 2012 eastern daylight time, a Gulfstream commander 690C, N840V, registered to kv oil and gas inc., crashed on landing at the… ## Other investigations on N840V (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 ERA14FA112](https://openairdocs.org/ntsb/ERA14FA112), Feb 3, 2014: Gulfstream AM Corp Comm Div 690 (N840V), Bellevue, TN, destroyed, 4 fatal. Probable cause: The pilot's failure to maintain airspeed with one engine inoperative, which resulted in a loss of control while on approach. Contributing to the accident were airframe ice accumulation due to… - [NTSB IAD99LA045](https://openairdocs.org/ntsb/IAD99LA045), May 24, 1999: Gulfstream American 690C (N840V), Hot Springs, VA, substantial damage. Probable cause: A hard landing due to the pilot's inadequate compensation for the wind conditions. 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.