Bell 47G-3B-1 N48217

Summary

On 28 April 1982 at about 17:00 local time, a Bell 47G-3B-1 registered N48217, operated by Intermountain Survey, was involved in an accident near Vermal, Utah, United States. 3 people were on board and 3 were seriously injured. The aircraft was substantially damaged. No probable cause statement is available for this record.

Date

28 April 1982 at 17:00

Classification

Accident

Location

Vermal, Utah, United States

Nearest airport

Vermal (SLC)

Coordinates

Not recorded

Aircraft

Bell 47G-3B-1

Registration

N48217

Category

Helicopter

Engines

1

Operator

Intermountain Survey

Operating rule

Part 137: Agricultural

Purpose of flight

Unknown

Phase of flight

Not recorded

Route

Vermal → Vermal

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

DEN82FTM11

3 people were seriously 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

THE PILOT STATED THAT HE EXPERIENCED A PARTIAL LOSS OF ENGINE POWER DURING LANDING AT AN ELEVATION OF ABOUT 5280 FT MSL. THE TEMPERATURE WAS ABOUT 50 DEGREES FAHRENHEIT. HE APPLIED FULL THROTTLE, BUT THE RPM DECAYED AND THE PLANE CRASH LANDED. A PARTIAL ENGINE TEARDOWN REVEALED THAT THE GROUNDING WIRE ON THE RIGHT MAGNETO WAS DISCONNECTED. ON THIS MAGNETO, A BENDIX S-200, THE DISCONNECTED WIRE WOULD CAUSE THE MAGNETO TO GROUND OUT AND CEASE FUNCTIONING. WITH ONE MAGNETO GROUNDED, THERE WOULD BE A LOSS OF ABOUT 200 RPM.

Quoted verbatim from the NTSB record.