Hughes 269B N9427F

Summary

On 26 September 1986 at about 15:30 local time, a Hughes 269B registered N9427F, operated by Dagnon Aviation, was involved in an accident near Baldwin, Wisconsin, United States. 2 people were on board and nobody was injured. The aircraft was substantially damaged. No probable cause statement is available for this record.

Date

26 September 1986 at 15:30

Classification

Accident

Location

Baldwin, Wisconsin, United States

Coordinates

44.9604, -92.3694

Aircraft

Hughes 269B

Registration

N9427F

Category

Helicopter

Engines

1

Operator

Dagnon Aviation

Operating rule

Part 91: General Aviation

Purpose of flight

Business

Phase of flight

Not recorded

Route

Minneapolis → Chippewa Falls

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

CHI86LA236

Nobody was injured.

The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.

Nothing about the cause is stated here that is not in the source record.

Read the full NTSB narrative

AFTER PICKING UP HIS PASSENGER AT WILLIAMS PIPELINE, MINNEAPOLIS, MINNESOTA, THE PLT FLEW EASTWARD ALONG INTERSTATE 90 ENROUTE TO A PIPELINE NEAR WAUSAU, WISCONSIN. WHILE FLYING AT APPROXIMATELLY 400 FEET, THE PLT AND PASSENGER STATED THAT THE ENGINE STARTED TO MAKE A GRINDING OR KNOCKING NOISE AND THAT THERE WAS AN ALMOST INSTANTANEOUS LOSS OF POWER. THE PLT THEN DROPPED THE COLLECTIVE AND TURNED APPROXIMATELY 40 DEGREES TO THE SANDY, UPWARD SLOPING GROUND. THE NOSE OF THE AIRCRAFT REMAINED LOW AND THE TAILBOOM RAISED. THE MAIN ROTOR BLADES THEN STRUCK THE TAILBOOM. WRECKAGE EXAMINATION REVEALED THAT THE NUMBER FOUR PISTON ROD PROTRUDED THROUGH THE ENGINE CASE, WHICH WAS CRACKED FROM THE HOLE TO THE NUMBER FOUR CYLINDER BASE.

Quoted verbatim from the NTSB record.