# NTSB ATL01LA030: Learjet 25B, N48WA, Ft. Pierce, FL, February 4, 2001 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: February 4, 2001, 13:24 local (17:24 UTC) - Place: Ft. Pierce, FL - Coordinates: 27.500732, -80.359657 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=27.5007&lon=-80.3597&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report November 23, 2001 - Report: Approved by Office Director - Parties: ORLANDO FSDO - NTSB case key (mKey): 51447 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL01LA030 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/51447/pdf - Page: https://openairdocs.org/ntsb/ATL01LA030 ## Probable cause The mechanic's failure to properly install and secure the left main landing gear aft trunnion pin in accordance with procedures. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Main gear collapsed, landing - roll - improper use of procedure, company maintenance personnel (cause) - landing gear,main gear attachment - loose part/bolt/nut/clamp/etc (cause) - maintenance,installation - improper, company maintenance personnel (cause) - Loss of control - on ground/water, landing - roll ## Analysis During take off the pilot experienced a landing gear retraction problem. Shortly after touch down, the left main landing gear broke away from the airframe. Directional control of the airplane was lost, and the airplane skidded off to the left side of the runway. Examination of the aircraft maintenance records revealed that the landing gear assembly had been removed and reinstalled during a recent maintenance procedure. Further examination revealed that the left main landing gear trunnion pin was improperly installed and secured in accordance with the Learjet maintenance manual. ## Factual narrative On February 4, 2001, at 1324 eastern standard time, a Learjet 25B, N48WA, skidded off the runway at St. Lucie County International Airport, in Fort Pierce, Florida. The aero medical flight was operated by Able American Jets under the provisions of Title 14 CFR part 91, with a flight plan filed. Visual weather conditions prevailed at the time of the accident. The Learjet received substantial damage, and the pilot and crew were not injured. The flight originated from Ft. Pierce, Florida, at 1200. According to pilot, after taking off, he experienced a landing gear retraction problem. Unable to resolve this problem, the crew then decided to return to St. Lucie County International Airport for an emergency landing. Shortly after touch down, the left main landing gear broke away from the airframe. The pilot reported that he lost directional control, and the aircraft then skidded off to the left side of the runway. Examination of the aircraft maintenance records revealed that the landing gear assembly had been removed and reinstalled during a recent maintenance procedure. Further examination revealed that the left main landing gear trunnion pin was improperly installed and not in accordance with the Learjet maintenance manual instructions. ## Aircraft - Registration: [N48WA](https://openairdocs.org/deregistered/N48WA-2018-01-04), registration cancelled 2018-01-04, S/N 136, built 1973 (OpenAirDocs) - Reported make and model: Learjet 25B - Registry model: [Gates Lear Jet 25B](https://openairdocs.org/model/gates-lear-jet-25b) (registry code 5170511) (OpenAirDocs) - Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs) - Category: Airplane - Serial number: 25-136 - Airframe hours: 10810 - Engines: GE CJ610-6 2950 lbs thrust turbo jet - Damage: Substantial damage - Flight: Public aircraft, Part 91 - Registered owner: Able American Jets - Airworthiness certificate: Standard, Normal - Last inspection: AAIP, January 19, 2001, 31 hours before - Departed: FPR, FT. PIERCE, FL - Destination: FPR, FT. PIERCE, FL - Flight plan: IFR - Airport: FPR, Ft. Pierce International, runway 27, 6,492 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 32; injuries: none; commercial; medical: class 1, valid medical--w/ waivers/lim; last flight review December 31, 2000; seat: left; flight hours: 4,500 total, 1,500 in this make and model, 3,800 as pilot in command, 140 in the last 90 days, 45 in the last 30 days, 6 in the last 24 hours - Co-pilot; age 33; injuries: none; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; last flight review January 1, 2001; seat: right; flight hours: 1,560 total, 150 in this make and model, 1,100 as pilot in command, 170 in the last 90 days, 70 in the last 30 days, 7 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 5 knots - Visibility: 10 statute miles - Lowest ceiling: 4,000 ft broken - Temperature: 68 °F, dew point 63 °F - Altimeter: 30.05 inHg - Observed at: FPR ## 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 20010204005509A](https://openairdocs.org/incident/20010204005509A), Feb 4, 2001: Lear 25B, Fort Pierce, FL, Substantial damage. (-23)See attached inspector's statement (.4) on February 4, 2001, at 1324 EST, a Learjet 25B, N48WA, skidded off the runway at st. Lucie county international… 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.