Bell 206B N59549

Summary

On 8 January 1985 at about 17:15 local time, a Bell 206B registered N59549 was involved in an accident near Trimmer, California, United States. One person was on board and one had minor injuries. The aircraft was substantially damaged. No probable cause statement is available for this record.

Date

8 January 1985 at 17:15

Classification

Accident

Location

Trimmer, California, United States

Coordinates

Not recorded

Aircraft

Bell 206B

Registration

N59549

Category

Helicopter

Engines

1

Operator

Not recorded

Operating rule

Part 91: General Aviation

Purpose of flight

Positioning

Phase of flight

Not recorded

Route

Fresno → Lake Wishon

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

LAX85FA101

1 person had minor injuries.

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 PLT STATED THE HELICOPTER LOST PWR DURING CRUISE WHEN HE ATTEMPTED TO ADD PWR TO CLIMB. HE STATED THAT N2 DECREASED ALONG WITH THE ACTIVATION OF VISUAL AND AUDIO ENGINE OUT WARNINGS. AN AUTOROTATION WAS PERFORMED TO A ROAD, HOWEVER, THE HELICOPTER SLID OFF THE ROAD AND DOWN A 50 DEG SLOPE IN THE TERRAIN BEFORE COMING TO REST. POST ACCIDENT TESTS REVEALED THE FUEL GOVERNOR, P/N 104100A12-A8, HAD AN EXCESSIVE LEAKAGE RATE AT THE BYPASS VALVUE AND THE DECELERATION AND SLOPE TESTS WERE OUT OF LIMITS. WHEN RETESTED, THE GOVERNOR WAS FOUND CAPABLE OF NORMAL OPERATION.

Quoted verbatim from the NTSB record.