# NTSB CHI98LA196: Cessna 172K, N758FY, Omaha, NE, June 10, 1998 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: June 9, 1998, 21:10 local (Jun 10, 1998, 02:10 UTC) - Place: Omaha, NE - Location: 41.3540° N, 96.0192° W: Placed by OpenAirDocs from NTSB’s distance and direction from North Omaha Airport (3NO), within about a mile (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=41.3540&lon=-96.0192&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report February 15, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 10911 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI98LA196 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/10911/pdf - Page: https://openairdocs.org/ntsb/CHI98LA196 ## Probable cause The aircraft modification not being in compliance with the Supplemental Type Certificate. A factor to the accident was the fracture of the landing gear axle during landing. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Gear collapsed, landing - roll - maintenance,modification - not complied with, other maintenance personnel (cause) - landing gear,axle - fractured (contributing factor) ## Analysis The pilot stated that he made a normal approach to the runway, had a normal touchdown, and the aircraft bounced once during the landing rollout. Approximately 15 to 20 yards into the landing rollout the left axle broke, causing the left gear leg to penetrate into the turf runway. The left wing contacted the ground, aircraft nosed over, and then came to a stop in an inverted position. Pilot stated that he shut down all of the aircraft systems and evacuated the passengers from the aircraft. Post accident investigation showed no indications of a hard landing or significant side-loading applied to the landing gear. The aircraft had been converted into a conventional gear type aircraft under a Supplemental Type Certificate (STC) in June of 1995. Subsequent investigation done by an inspector with the Federal Aviation Administration (FAA) showed that the STC requires that there is an installation of wheel spindles inside the axle assemblies to provide reinforcement. On site investigation, completed by the FAA, indicated that the above noted spindle assemblies were not present at the time of the accident. ## Factual narrative On June 9, 1998, at 2110 central daylight time, a Cessna 172K, N758FY, sustained substantial damage when the left main gear collapsed during landing rollout on runway 35 (2180' x 40', turf, wet) at the North Omaha Airport, near Omaha, Nebraska. The private pilot and two passengers reported no injuries. The 14 Part 91 personal flight was operating in visual meteorological conditions at the time of the accident. There was no flight plan on file. The flight departed from Anita Municipal-Burke Memorial Field, near Anita, Iowa, at 2020. According to the pilot's written statement, the pilot stated that he made a normal approach to the runway, had a normal touchdown, and the aircraft bounced once during the landing rollout. Approximately 15 to 20 yards into the landing rollout the left axle broke, causing the left gear leg to penetrate into the turf runway. The left wing contacted the ground, aircraft nosed over, and then came to a stop in an inverted position. Pilot stated that he shut down all of the aircraft systems and evacuated the passengers from the aircraft. Post accident investigation showed no indications of a hard landing or significant side-loading applied to the landing gear. The aircraft had been converted into a conventional gear type aircraft under a Supplemental Type Certificate (STC) in June of 1995. Subsequent investigation done by an inspector with the Federal Aviation Administration (FAA) showed that the STC requires that there is an installation of wheel spindles inside the axle assemblies to provide reinforcement. On site investigation, completed by the FAA, indicated that the above noted spindle assemblies were not present at the time of the accident. ## Aircraft - Registration: [N758FY](https://openairdocs.org/deregistered/N758FY-2007-08-24), registration cancelled 2007-08-24, S/N R1723072, built 1978 (OpenAirDocs) - Reported make and model: Cessna 172K - Registry model: [Cessna R172K](https://openairdocs.org/model/cessna-r172k) (registry code 2072431) (OpenAirDocs) - Registry engine: [Continental IO-360 series](https://openairdocs.org/engine/continental-io-360-series) (registry code 17025, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: R1723072 - Airframe hours: 1229 - Engines: Continental IO-360-K 210 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Brian J. Bogard - Airworthiness certificate: Standard, Normal - Last inspection: Annual, September 20, 1997, 44 hours before - Departed: Y43, ANITA, IA - Destination: 3NO - Airport: 3NO, North Omaha Airport, runway 35, 2,480 × 60 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 38; private; airplane ratings: single-engine sea, single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 296 total, 195 in this make and model, 274 as pilot in command, 16 in the last 90 days, 14 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Night/bright - Wind: 110° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 59 °F, dew point 57 °F - Altimeter: 29.00 inHg - Observed at: OMA, 10 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 19980609024769A](https://openairdocs.org/incident/19980609024769A), Jun 9, 1998: Cessna R172K, Omaha, NE, Substantial damage. Left main gear collapsed on touchdown. (.4)the pilot stated that he made a normal approach to the runway, had a normal touchdown, and the aircraft bounced once… 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.