Grumman G-164A N9822

Summary

On 18 May 1984 at about 12:40 local time, a Grumman G-164A registered N9822 was involved in an accident near Wiggins, Colorado, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. No probable cause statement is available for this record.

Date

18 May 1984 at 12:40

Classification

Accident

Location

Wiggins, Colorado, United States

Coordinates

40.2305, -104.0707

Aircraft

Grumman G-164A

Registration

N9822

Category

Airplane

Engines

1

Operator

Not recorded

Operating rule

Part 137: Agricultural

Purpose of flight

Aerial Application

Phase of flight

Not recorded

Route

Greeley → Unknown

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

DEN84LA153

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

WHILE EN ROUTE TO A FIELD FOR AERIAL APPLICATION, AN OIL MIST APPEARED ON THE WINDSHIELD OF THE ACFT. SHORTLY AFTER THAT, THE ENG PROGRESSIVELY LOST POWER & THE PLT MADE A FORCED LANDING IN A PASTURE. DURING THE LANDING ROLL, THE ACFT HIT A HOLE IN THE GROUND & NOSED OVER. AN EXAM OF THE ENG REVEALED THAT THE EXHAUST ROCKER BOX ON THE #1 CYLINDER HAD CRACKED & SEPARATED WHERE THE OIL LINES WERE ATTACHED. THERE WERE 2 PRATT & WHITNEY SERVICE BULLETINS CONCERNING R-1340-AN1 CYLINDERS THAT WERE NOT COMPLIED WITH. SB-1720 RECOMMENDED AN INSPECTION OF THE CYLINDER HEADS DURING OVERHAUL. SB-1743 CALLED FOR REPLACEMENT OF ALL CYLINDERS WITH IMPROVED CYLINDERS HAVING A 5/8 INCH REENFORCEMENT WEB ON THE EXHAUST ROCKER BOX. THE OLD CYLINDERS HAD 1/2 INCH WEB. THE ACFT HAD FLOWN 360 HRS SINCE THE LAST MAJOR OVERHAUL.

Quoted verbatim from the NTSB record.