Hiller UH-12E N28875

Summary

On 28 May 1987 at about 23:30 local time, a Hiller UH-12E registered N28875, operated by Olympic Air, Inc., was involved in an accident near Shelton, Washington, United States. One person was on board and one died. The aircraft was destroyed. No probable cause statement is available for this record.

Date

28 May 1987 at 23:30

Classification

Accident

Location

Shelton, Washington, United States

Coordinates

47.2303, -123.1994

Aircraft

Hiller UH-12E

Registration

N28875

Category

Helicopter

Engines

1

Operator

Olympic Air, Inc.

Operating rule

Part 91: General Aviation

Purpose of flight

Positioning

Phase of flight

Not recorded

Route

Silverdale → Shelton

Aircraft damage

Destroyed

Weather

VMC

Light

Day

NTSB number

SEA87FA106

1 person died.

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

THE PILOT WAS PROPERLY CERTIFICATED FOR THE FLIGHT; HOWEVER, DUE TO OPERATOR INSURANCE RESTRICTIONS, ALL PRIOR COMMERCIAL FLIGHTS HAD REQUIRED THE OWNER/OPERATOR TO ACCOMPANY THIS PILOT, THEREFORE THIS WAS THE PILOT'S FIRST COMMERCIAL FLIGHT AS SOLE PILOT. RETURNING TO BASE AFTER A ROUND-TRIP PASSENGER FLIGHT, HAVING DISEMBARKED PASSENGERS, THE AIRCRAFT WAS OBSERVED PROCEEDING AT HIGH FORWARD SPEED IN STRONG BUT INTERMITTENT WIND CONDITIONS. ALSO, PASSENGERS REMARKED ABOUT TURBULENCE ALONG THIS SAME ROUTE OF FLIGHT EARLIER. INVESTIGATION REVEALED THE MAIN ROTOR SEPARATED IN FLIGHT DUE TO MAST BUMPING, A PHENOMENON ASSOCIATED WITH TEETERING ROTOR SYSTEMS, INDUCED BY EXCEEDING THE NORMAL FLIGHT ENVELOPE FOR THE AIRCRAFT.

Quoted verbatim from the NTSB record.