Grumman G-164A N6589

Summary

On 15 July 1984 at about 17:00 local time, a Grumman G-164A registered N6589 was involved in an accident near Richey, Montana, United States. One person was on board and nobody was injured. The aircraft was destroyed. No probable cause statement is available for this record.

Date

15 July 1984 at 17:00

Classification

Accident

Location

Richey, Montana, United States

Coordinates

47.7107, -105.0294

Aircraft

Grumman G-164A

Registration

N6589

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 137: Agricultural

Purpose of flight

Aerial Application

Phase of flight

Not recorded

Route

Richey → Unknown

Aircraft damage

Destroyed

Weather

VMC

Light

Day

NTSB number

DEN84LA224

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

THE PLT HAD FINISHED SPRAYING & WAS PROCEEDING TO THE GLENDIVE ARPT. HE SAID THAT ENG OR PROP BEGAN A SUDDEN SEVERE VIBRATION WHICH REQUIRED THE ENG TO BE SHUT DOWN. AN EMEGENCY LANDING WAS MADE. THE PLT STATED THAT THE LEFT WING IMPACTED A HILL WHICH SPUN THE ACFT TO THE LEFT. SUBSEQUENTLY, THE RIGHT MAIN GEAR, TAILWHEEL & THE UPPER & LOWER RIGHT WINGS FAILED. A POST IMPACT FIRE DESTROYED THE ACFT. AN EXAM REVEALED THAT THE OUTER 13 INCHES OF 1 PROP BLADE, P/N 6101A-13, HAD FAILED. ALSO, THE ENG MOUNTING & SEVERAL MOUNTS WERE FOUND BROKEN. RECORDS INDICATED THE HAMILTON STANDARD (PROP HUB 2-D-30-237) HAD BEEN OVERHAULED & TWISTED BLADES HAD BEEN STRAIGHTENED IN 1977. TOTAL TIME ON THE PROP SINCE OVERHAUL WAS 1168 HRS.

Quoted verbatim from the NTSB record.