# NTSB LAX00LA046: Aeronca 11AC, N3933E, Sedona, AZ, November 29, 1999 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: November 28, 1999, 19:31 local (Nov 29, 1999, 02:31 UTC) - Place: Sedona, AZ - Coordinates: 34.939819, -111.940994 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=34.9398&lon=-111.9410&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report May 16, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 47856 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX00LA046 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/47856/pdf - Page: https://openairdocs.org/ntsb/LAX00LA046 ## Probable cause The pilot's inadequate compensation for the crosswind conditions and subsequent failure to maintain directional control of the airplane. ## 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 - compensation for wind conditions - inadequate, pilot in command (cause) - directional control - not maintained, pilot in command (cause) - ground loop/swerve - not corrected, pilot in command (cause) - On ground/water collision with object, landing - object - vasi light/system ## Analysis The pilot said he was making a normal approach to runway 3 after he received ASOS weather information from the airport, which stated that the winds were from 070 degrees at 5 knots. He said the approach was normal and the landing was smooth. Immediately after touchdown, a gust of wind caused the airplane to begin to ground loop. The airplane rotated 90 degrees to the left, departed the runway, and struck an electrical box with the right wing. The pilot stated there were no mechanical malfunctions or failures with the airplane. ## Factual narrative On November 28, 1999, at 0830 hours mountain standard time, an Aeronca 11AC, N3933E, veered off the runway and collided with an electrical box while landing at the Sedona, Arizona, airport. The airplane, owned and operated by Chief Aerospace LLC, sustained substantial damage. The private pilot, the sole occupant, was not injured. The flight was being operated under 14 CFR Part 91 as a personal flight when the accident occurred. The airplane was not on a flight plan, but visual meteorological conditions prevailed at the time of the accident. The flight originated at Deer Valley airport at 0815, and was destined for the Sedona airport. The pilot said he made a normal approach to runway 03 after receiving the AWOS (automatic recorded weather information) that said the winds were from 070 degrees at 5 knots. He reported that his final approach proceeded smoothly and he touched down in a three-point attitude. He said that just after touchdown, a gust of wind caused the airplane to begin to ground loop. The airplane rotated 90 degrees to the left, departed the runway, and struck an electrical box with the right wing strut. The pilot reported there were no mechanical malfunctions or failures with the airplane. ## Aircraft - Registration: [N3933E](https://openairdocs.org/aircraft/N3933E), registered now, S/N 11BC-15, built 1947 (OpenAirDocs) - Reported make and model: Aeronca 11AC - 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: 11BC-15 - Airframe hours: 2831 - Engines: Continental C-85-8F 85 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Chief Aerospace LLC - Airworthiness certificate: Standard, Normal - Last inspection: Annual, April 10, 1999, 127 hours before - Departed: DVT, DEER VALLEY, AZ - Airport: KSEZ, Sedona, runway 3, 5,132 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 41; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 255 total, 43 in this make and model, 216 as pilot in command, 26 in the last 90 days, 10 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 70° at 5 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 45 °F, dew point 7 °F - Altimeter: 30.00 inHg - Observed at: SEZ, 1 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 19991128036599A](https://openairdocs.org/incident/19991128036599A), Nov 28, 1999: Bbavia 11AC, Sedona, AZ, Substantial damage. (.19) On November 28, 1999 at 0830 hours mountain standard time, an Aeronca 11AC, N3933E, collided with an electrical box after it ground looped near Sedona,… 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.