# NTSB SEA06IA019: Gulfstream Aerospace G-5, N225GV, Hillsboro, OR, November 21, 2005 - Type: NTSB incident investigation - Classification: Incident · No injuries · Incident investigation · Final report - Date: November 21, 2005, 06:00 local (14:00 UTC) - Place: Hillsboro, OR - Coordinates: 45.540279, -122.949722 - Nearby events: https://openairdocs.org/map.md?lat=45.5403&lon=-122.9497&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 7 uninjured - Status: Completed, report March 28, 2006 - Report: Approved by Office Director - Parties: FAA FSDO - NTSB case key (mKey): 62857 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA06IA019 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/62857/pdf - Page: https://openairdocs.org/ntsb/SEA06IA019 ## Probable cause The failure of the right main landing gear (MLG) door uplock linkage actuator due to corrosion, which resulted in jamming of the right MLG during the initial takeoff climb. ## Analysis The pilot said that as they raised the landing gear on takeoff, and the right main landing gear (MLG) door did not retract. He said that the checklist instructed him to cycle the landing gear; when he cycled the landing gear, the right MLG became jammed in the half down position. The pilot performed a low fly-by, and maintenance personnel on the ground photographed the bottom of the airplane. Gulfstream Aerospace engineers reviewed the photograph and advised the pilot in how to extend the landing gear. The pilot was then able to extend the landing gear. Six hours and ten minutes after takeoff, the airplane landed successfully. Post-incident examination of the right MLG revealed a black/rubber skid mark on the inside of the MLG door; the skid mark terminated at a row of 27 bolts which hold a gap seal in place. The outboard tire of the right MLG truck exhibited seven evenly spaced gouges which matched the spacing of the gap seal bolts. The MLG door uplock linkage bungee/actuator's (P/N 1159L50903-1) exterior exhibited advanced exfoliating corrosion. ## Factual narrative On November 21, 2005, at approximately 0600 Pacific standard time, a Gulfstream Aerospace, G-5, N225GV, was not damaged following a right main landing gear door sequencing failure near Portland-Hillsboro Airport (KHIO), Hillsboro, Oregon. The airline transport pilot, the airline transport co-pilot, the cabin attendant, and four passengers were not injured. Nike Inc. was operating the flight under Title 14 CFR Part 91. Visual meteorological conditions prevailed for the cross-country business flight which was originating at the time of the event. An IFR flight plan had been activated with a destination of Toronto, Canada. The pilot said that as they raised the landing gear on takeoff, the right main landing gear (MLG) door did not retract. He said that the checklist instructed him to cycle the landing gear; when he cycled the landing gear, the right MLG became jammed in the half down position. The pilot performed a low fly-by, and maintenance personnel on the ground photographed the bottom of the airplane. Gulfstream Aerospace engineers reviewed the photograph and advised the pilot in how to extend the landing gear. The pilot was then able to extend the landing gear. Six hours and ten minutes after takeoff, the airplane landed successfully. Post-incident examination of the right MLG revealed a black/rubber skid mark on the inside of the MLG door; the skid mark terminated at a row of 27 bolts which hold a gap seal in place. The outboard tire of the right MLG truck exhibited seven evenly spaced gouges which matched the spacing of the gap seal bolts. The MLG door uplock linkage bungee/actuator's (P/N 1159L50903-1) exterior exhibited advanced exfoliating corrosion. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, takeoff - initial climb - landing gear,main gear - jammed (cause) - hydraulic system,actuator - corroded (cause) ## Aircraft - Registration: N225GV (not matched to a registry record) - Reported make and model: Gulfstream Aerospace G-5 - Category: Airplane - Serial number: 672 - Airframe hours: 2271 - Engines: Rolls-Royce BR710 14750 lbs thrust turbo fan; Rolls-Royce BR710 14750 lbs thrust turbo fan - Damage: Minor damage - Flight: Business, Part 91 - Registered owner: Nike Inc. - Airworthiness certificate: Standard, Transport - Last inspection: November 1, 2005 - Departed: HIO, Hillsboro, OR - Destination: CYYZ, Toronto - Flight plan: IFR - Airport: HIO, Portland-Hillsboro Airport, runway 030, 6,600 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 51; injuries: none; airline transport, flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, with waivers/limitations; last flight review September 1, 2005; seat: left; flight hours: 5,000 total, 500 in this make and model, 4,800 as pilot in command, 100 in the last 90 days, 40 in the last 30 days, 6 in the last 24 hours - Co-pilot; age 41; injuries: none; airline transport, commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review August 1, 2005; seat: right; flight hours: 9,500 total, 350 in this make and model, 8,400 as pilot in command, 120 in the last 90 days, 60 in the last 30 days, 6 in the last 24 hours ## Weather - Conditions: Visual (VMC), Night/bright - Wind: 310° at 3 knots - Visibility: 8 statute miles - Lowest ceiling: none - Temperature: 27 °F, dew point 27 °F - Altimeter: 30.31 inHg - Observed at: HIO ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Incident 20051121027829I](https://openairdocs.org/incident/20051121027829I), Nov 21, 2005: Gulstm GV, Portland, OR. (-23) On or about 11/21/2005 at approximately 0600 PST Gulfstream ga-v-v; s/n: 672; r/n: N225GV, belonging to nike, inc. (nike) of beaverton, Oregon departed… 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.