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THE TOWNSHIP'S ONE DOCUMENTED AVIATION EVENT
On Sunday, 22 May 1988, a Cessna 172, registration N5848A, departed a grass strip at North Liberty and did not climb out. The National Transportation Safety Board's record (number CHI88LA115, narrative as republished from the NTSB database) states the flight, conducted under Part 91: the pilot was unable to maintain a sufficient rate of climb and airspeed during climbout, pushed the nose forward to regain airspeed, and the aircraft struck the ground nose-down, collided with the field perpendicular to the furrows, broke the nosewheel off, and flipped over. The accident report's data names the aircraft's owner of record as Gary C. Peterson of North Liberty — the same name the FAA record carries as owner of Peterson Ultralight Flightpark (36IN) — and gives the location as "Private Strip Airport, North Liberty." The identification of the accident strip with the Peterson strip therefore stands at strong-directory strength (owner name, private strip, town), one step below an explicit facility identifier in the narrative, and prints at that strength. The narrative reached does not state injuries; the injury and damage fields stand unreached (gap G-W3A-5), and no fatality is claimed or denied here. The accident's place in the leg is double: it is the township's only primary-record aviation event, and it proves a grass strip in use at North Liberty by May 1988, two years before 36IN's activation date of record — consistent with a private strip formalised in 1990.
A second row exists in a tertiary list and prints as a lead, never as an accident. Conflict C111: PlaneCrashMap's Indiana list carries "N737VP | 1991-04-03 | Cessna C172N | North Liberty, IN." Three targeted searches on that registration, date and town returned no NTSB report, no NTSB-derived summary, and no press item; the verified NTSB-derived index carries the 1988 North Liberty accident and no 1991 one was reached. The row may be a nearest-city coding of a record the reached surfaces did not return, or an error; either way it is unverified, and the settler is a direct NTSB CAROL location query this section's tools could not execute (G-W3A-5). No other North Liberty or Liberty Township accident surfaced in any search run.
Principal sources: NTSB accident narrative CHI88LA115 as republished (accidents.app; aircraftone.com) — first-hand narrative text; PlaneCrashMap Indiana list (tertiary, snippet).