# NTSB IAD99LA055: Aeronca 11BC, N3756E, Millbrook, NY, July 17, 1999 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: July 17, 1999, 10:30 local (14:30 UTC) - Place: Millbrook, NY - Coordinates: 41.670352, -73.730278 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=41.6704&lon=-73.7303&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report November 2, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 47723 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD99LA055 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/47723/pdf - Page: https://openairdocs.org/ntsb/IAD99LA055 ## Probable cause was the pilot's inadequate compensation for winds and his failure to maintain directional control. ## 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 - tailwind - compensation for wind conditions - inadequate, pilot in command (cause) - directional control - not maintained, pilot in command (cause) - On ground/water collision with object, landing - roll ## Analysis The pilot reported the airplane encountered a 'right quartering tailwind' during rollout after landing. He said that braking action was lost in the grass after the airplane departed the right side of the runway. The airplane continued into a gully and struck a rock. ## Factual narrative On July 17, 1999, at 1030 eastern daylight time, an Aeronca 11BC, N3756E, was substantially damaged during the landing roll at the Sky Acres Airport (44N), Millbrook, New York. The certificated private pilot and passenger were not injured. Visual meteorological conditions prevailed for the personal flight that originated at Oxford, Connecticut (OXC), at 1000. No flight plan was filed for the flight conducted under 14 CFR Part 91. In a telephone interview, the pilot stated the purpose of the flight was to fly to Sky Acres with his grandson. He said they departed Oxford on runway 36, and was surprised to learn that traffic was landing on runway 17, at 44N. The pilot said he called for a traffic advisory to confirm the runway in use before entering the traffic pattern for runway 17. The pilot said: "I landed about the numbers and I was rolling out. I slowed to about 30 miles per hour and was about to add power to taxi when I got the push. It was a right quartering tailwind. I was way, way, down the runway before I got the push. I got pushed off the right side of the runway and down into a 25-foot gully. There was about 15 feet of grass before reaching the gully. I hit the brakes hard, but I lost braking action on the grass. I rolled down into the gully and struck the rock nobody wants to find." The pilot said he had 488 hours of flight experience, of which 99 hours were in make and model. He said he had recently restored the airplane and that it had no mechanical deficiencies. Winds reported at Poughkeepsie, New York, 8 miles southwest of Sky Acres were from 200 degrees at 8 knots. ## Aircraft - Registration: [N3756E](https://openairdocs.org/aircraft/N3756E), registered now, S/N 11AC-S-3, built 1947 (OpenAirDocs) - Reported make and model: Aeronca 11BC - Registry model: [Aeronca 11AC](https://openairdocs.org/model/aeronca-11ac) (registry code 0191102) (OpenAirDocs) - Registry engine: [Continental A&C65 series](https://openairdocs.org/engine/continental-a-c65-series) (registry code 17003, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 11AC-S-3 - Airframe hours: 2419 - Engines: Lycoming O-235C 100 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: George F. Hollenweger - Airworthiness certificate: Standard, Normal - Last inspection: Annual, October 30, 1998, 91 hours before - Departed: OXC, OXFORD, CT - Destination: 44N - Airport: 44N, Sky Acres Airport, runway 17, 3,879 × 20 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 66; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 478 total, 99 in this make and model, 389 as pilot in command, 31 in the last 90 days, 9 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 200° at 8 knots - Visibility: 6 statute miles - Lowest ceiling: none - Temperature: 91 °F, dew point 66 °F - Altimeter: 30.00 inHg - Observed at: POU, 8 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 19990717044629A](https://openairdocs.org/incident/19990717044629A), Jul 17, 1999: Bbavia 11AC, Millbrook, NY, No damage. (-23) This was a private pleasure flight on a VMC day in a tail wheel equipped aircraft. The pilot did not file a flight plan. The aircraft departed oxford,… 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.