# NTSB CHI99LA097: Cessna 182E, N3177Y, East Troy, WI, February 21, 1999 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: February 21, 1999, 11:00 local (17:00 UTC) - Place: East Troy, WI - Coordinates: 42.779037, -88.389831 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=42.7790&lon=-88.3898&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 5 uninjured - Status: Completed, report May 8, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 45803 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI99LA097 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/45803/pdf - Page: https://openairdocs.org/ntsb/CHI99LA097 ## Probable cause the collapse of the right main landing gear from a preexisting fatigue crack. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Gear collapsed, taxi - to takeoff - landing gear,main gear - collapsed (cause) - landing gear,main gear - corroded (contributing factor) - landing gear,main gear - fatigue (contributing factor) ## Analysis The pilot stated that after four parachutists had boarded the airplane, he began to taxi away from the gate. The pilot stated that the airplane traveled about 25 yards on the upward sloping grass terrain when the right main landing gear collapsed. Examination of the landing gear revealed a break approximately 10 inches from the inboard end of the landing gear leg at a point where it is clamped to the fuselage structure. Further examination of the airplane revealed no other anomalies. Examination of the landing gear by the Materials Laboratory Division of the National Transportation Safety Board indicated that the break stemmed from preexisting fatigue regions located on the lower forward surface of the landing gear leg. This area of the gear also contained evidence of fretting damage in areas where there had been a loss of paint. ## Factual narrative On February 21, 1999, at 1100 central standard time (cst), a Cessna 182E, N3177Y, piloted by a commercial pilot, sustained substantial damage during taxi at East Troy Municipal Airport, in East Troy, Wisconsin, after a collapse of the right main landing gear. Visual meteorological conditions prevailed at the time of the accident. The commercial 14 CFR Part 91 flight was not operating on a flight plan. The pilot reported no injuries to himself or the four passengers. The flight was originating at the time of the accident. The pilot stated that after four parachutists had boarded the airplane, he began to taxi away from the gate. The pilot stated that the airplane traveled about 25 yards on the upward sloping grass terrain when the right main landing gear collapsed. Post accident investigation showed substantial damage to the right wing and horizontal stabilizer. Examination of the landing gear revealed a break approximately 10 inches from the inboard end of the landing gear leg at a point where it is clamped to the fuselage structure. Further examination of the airplane revealed no other anomalies. Examination of the landing gear by the Materials Laboratory Division of the National Transportation Safety Board indicated that the break stemmed from preexisting fatigue regions located on the lower forward surface of the landing gear leg. This area of the gear also contained evidence of fretting damage in areas where there had been a loss of paint. ## Aircraft - Registration: [N3177Y](https://openairdocs.org/aircraft/N3177Y), registered now, S/N 18254177, built 1962 (OpenAirDocs) - Reported make and model: Cessna 182E - Registry model: [Cessna 182E](https://openairdocs.org/model/cessna-182e) (registry code 2072712) (OpenAirDocs) - Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 18254177 - Airframe hours: 7210 - Engines: Continental O470L16F 230 horsepower reciprocating - Damage: Substantial damage - Flight: Business, Part 91 - Registered owner: Skynights Sport Parachute Club - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, August 22, 1998, 99 hours before - Departed: 57C - Airport: 57C, East Troy Municipal Arpt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 58; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 1,100 total, 1,100 as pilot in command, 5 in the last 90 days, 1 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 20° at 12 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 28 °F, dew point 16 °F - Altimeter: 30.00 inHg - Observed at: MKE, 27 nm away ## 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 19990221001699A](https://openairdocs.org/incident/19990221001699A), Feb 21, 1999: Cessna 182E, East Troy, WI, Substantial damage. Acft was taxiing to the rwy for departure when the main landing gear collapsed.(.19) on February 21, 1999, at 1100 central standard time (CST), a Cessna 182E,… 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.