# NTSB CHI99LA274: North American AT-6G, N98FP, Harlan, IA, August 1, 1999 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: August 1, 1999, 15:00 local (20:00 UTC) - Place: Harlan, IA - Coordinates: 41.6492, -95.320617 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=41.6492&lon=-95.3206&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report October 13, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 46911 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI99LA274 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/46911/pdf - Page: https://openairdocs.org/ntsb/CHI99LA274 ## Probable cause the failure of the pilot to maintain directional control of the aircraft during landing. Factors to the accident were the crosswind, the failure of the pilot to maintain compensation for the crosswind condition on approach, and the inadvertent ground loop encountered by the pilot. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, landing - roll - weather condition - crosswind (contributing factor) - compensation for wind conditions - not maintained, pilot in command (contributing factor) - directional control - not maintained, pilot in command (cause) - ground loop/swerve - inadvertent, pilot in command (contributing factor) - On ground/water encounter with terrain/water, landing - roll - terrain condition - ditch (contributing factor) ## Analysis On landing, the aircraft departed the left side of the runway 33 and struck a small ditch embankment. The aircraft came to rest approximately 100 yards west of the runway. A weather report showed winds from 30-degrees magnetic at 8 knots gusting to 14 knots. The pilot stated that he was landing in a crosswind. The pilot stated that the crosswind correction used on the approach was not '...well stabilized, and [a] go around was contemplated, but [the airplane] touched down and ground looped.' A post accident examination of the airplane revealed no preexisting anomalies. ## Factual narrative On August 1, 1999, at 1500 central daylight time, a North American AT-6G, N98FP, piloted by a commercial pilot, sustained substantial damage during landing, on Runway 33 (4,100 feet by 75 feet, dry/asphalt), at the Harlan Municipal Airport, Harlan, Iowa. The flight was conducted under the provisions of 14 CFR Part 91 and was not on a flight plan. The pilot reported no injuries to himself or to his one passenger. The flight had originated from the Wittman Regional Airport, Oshkosh, Wisconsin, about 1200. In a written statement, the pilot stated that he was landing in a crosswind. The pilot stated that the crosswind correction used on the approach was not "...well stabilized, and [a] go around was contemplated, but [the airplane] touched down and ground looped." The aircraft departed the left side of the runway and struck a small ditch embankment. The aircraft came to rest approximately 100 yards west of the runway. A weather report for a reporting station located at the Aububon County Airport, Audubon, Iowa, which is 20 nautical miles and 70-degrees magnetic from the accident site, was reporting winds from 30-degrees magnetic at 8 knots gusting to 14 knots. A post accident examination of the airplane revealed no preexisting anomalies. ## Aircraft - Registration: [N98FP](https://openairdocs.org/aircraft/N98FP), registered now, S/N 7695, built 1944 (OpenAirDocs) - Reported make and model: North American AT-6G - Registry model: [North American AT-6G](https://openairdocs.org/model/north-american-at-6g) (registry code 6400434) (OpenAirDocs) - Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 7695 - Airframe hours: 4197 - Engines: P&W 1340-AN 600 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: William M Reed - Airworthiness certificate: Standard, Normal - Last inspection: Annual, July 1, 1999, 21 hours before - Departed: OSH, OSHKOSH, WI - Destination: HNR - Airport: HNR, Harlan Municipal Airport, runway 33, 4,100 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 64; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 603 total, 422 in this make and model, 513 as pilot in command, 31 in the last 90 days, 23 in the last 30 days, 3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 30° at 8 knots, gusting 14 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 77 °F, dew point 64 °F - Altimeter: 30.00 inHg - Observed at: ADU, 20 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 19990801040359A](https://openairdocs.org/incident/19990801040359A), Aug 1, 1999: Namer AT6G, Harlan, IA, No damage. (-23) Pilot stated that while landing at Harlan, Iowa, runway 33 he made a poor approach and lost control of the aircraft. The aircraft departed the left side… 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.