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ASN Wikibase Occurrence # 73518
Last updated: 21 July 2020
This record is based on the official accident investigation report. It has been locked for editing.

Date:20-MAR-2010
Time:11:45
Type:Silhouette image of generic RV6 model; specific model in this crash may look slightly different
Van's RV-6
Owner/operator:Private
Registration: N788LL
C/n / msn: 002
Fatalities:Fatalities: 2 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Williston, FL -   United States of America
Phase: En route
Nature:Private
Departure airport:Ocala, FL (OCF)
Destination airport:Williston, FL (X60)
Investigating agency: NTSB
Narrative:
The airplanes were both on approach to the destination airport, operating under visual conditions, when they collided about 3 nautical miles southeast of the destination airport. The wreckage of both airplanes came to rest within 100 yards of one another. The Piper was flying on a course to the right of the RV-6ís departure airport. Around the same time, the RV-6 departed, and both airplanes' flight paths nearly paralleled one another as they continued on course to the destination airport. During the next 7 minutes, the Piper made a gradual descent from 5,200 feet mean sea level (msl) to 1,700 feet msl at a ground speed of about 132 knots. The Piper continued on the same heading until about 2 miles before impact, where it made a gradual left turn. The RV-6 (altitudes unknown) continued on the same flight path until about 4 miles before impact, where it began a slow right turn.
The last portion of recorded radar data of the RV-6 and the Piper showed the airplanes were converging on respective true courses of about 328 and 294 degrees. Based upon this radar data, the expected collision angle was calculated to be about 34 degrees. The collision angle between the airplanes was physically determined by measuring the mass intrusion signature of the RV-6's propeller blade into the left wing of the Piper. This signature corresponds to a collision angle of about 44 degrees. Based on this measurement and radar derived ground speeds, the RV-6's convergence angle was calculated to be about 66 degrees right and the Piperís was 70 degrees left.
Probable Cause: The pilots of both airplanes did not maintain an adequate visual lookout to see and avoid each other.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20100320X60644&key=1


Revision history:

Date/timeContributorUpdates
20-Mar-2010 21:34 slowkid Added
21-Mar-2010 01:34 RobertMB Updated [Time, Aircraft type, Operator, Departure airport]
21-Dec-2016 19:25 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
19-Mar-2017 07:11 junior sjc Updated [Location, Departure airport, Damage, Narrative]
26-Nov-2017 15:56 ASN Update Bot Updated [Aircraft type, Operator, Total fatalities, Total occupants, Other fatalities, Departure airport, Destination airport, Source, Damage, Narrative]