Casualties unknown

1998-08-16: Cessna 170 (N2574V) — Boulder, CO

Boulder, CO, US

On August 16, 1998, a Cessna 170 (registration N2574V) was involved in an aviation accident near Boulder, CO. Investigators recorded the probable cause as: The pilot's intentional ground loop and his inadequate compensation for the wind condition. A contributng factor was crosswinds. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

A pilot landing on runway 26 executed a ground loop after difficulty maintaining alignment, opting to avoid the lake at the west end of the runway.

Incident Details

As the pilot approached the airport for a full stop landing, he overheard another pilot who was landing on runway 8 report a tail wind during the landing sequence. The pilot then noticed that the windsock on the east end of the runway was standing straight out, indicating a wind direction that appeared to be approximately 180 degrees.

Landing Maneuver

The pilot landed on runway 26 but reported difficulty keeping the airplane aligned with the centerline. He stated, "I didn't feel at the time I stood any chance of gaining airspeed to execute a climb." Instead of attempting a go-around or risking entry into the lake on the west end of the runway, he performed a ground loop.

Weather Observations

One witness reported that immediately after the accident, the wind was coming from the northeast. The nearest weather reporting station, located 9 nautical miles southeast of the airport, recorded winds at 1549 as 180 degrees at 13 knots. At 1655, the winds were 150 degrees at 11 knots, gusting to 20 knots.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X10853. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.