Casualties unknown

1989-02-14: Mbb BK-117 A-1 (N7025L) — U. S. Jet — Tyler, TX

Tyler, TX, US

On February 14, 1989, a Mbb BK-117 A-1 (registration N7025L) operated by U. S. Jet was involved in an aviation accident near Tyler, TX. Investigators recorded the probable cause as: THE PILOT'S FAILURE TO EXECUTE THE PUBLISHED INADVERTENT IMC PROCEDURES WHEN HE ENCOUNTERED ADVERSE WEATHER CONDITIONS. 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

An EMS helicopter struck 70-foot power lines on a night non-emergency mission. Weather was IMC with low ceilings, rain, and thunderstorms. The pilot, aware of conditions, did not follow the hospital's IMC procedures.

Accident Overview

An aircraft executing a night non-emergency EMS mission crashed after contacting 70-foot tall high tension power lines.

Weather Conditions

Witnesses reported that the weather was instrument meteorological conditions (IMC) with low overcast ceilings, visibility ranging from 1/4 to 1 mile, rain and fog, and thunderstorms throughout the area. The rain varied from drizzle to very heavy at times.

Pilot Information

The pilot received three briefings from the Automated Flight Service Station (AFSS) and was fully aware of the weather conditions. He had the authority to refuse the mission if, in his judgment, the weather was questionable or unacceptable.

Operational Procedures

The hospital had written procedures for inadvertent flight into IMC, which the pilot did not follow. Records fail to indicate that the pilot had reviewed these procedures, nor do they indicate that the pilot had received any instrument flight rules (IFR) training during his one month of employment.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X27720. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.