Grumman G164 N6894Q

Summary

On 12 March 2016 at about 01:25 local time, a Grumman G164 registered N6894Q was involved in an accident near Juliaetta, Idaho, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

12 March 2016 at 01:25

Classification

Accident

Location

Juliaetta, Idaho, United States

Coordinates

46.5794, -116.8111

Aircraft

Grumman G164

Registration

N6894Q

Category

Airplane

Year built

1977

Engines

1

Operator

Not recorded

Operating rule

Part 137: Agricultural

Purpose of flight

Aerial Application

Phase of flight

Not recorded

Route

Juliaetta → Juliaetta

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

WPR16LA082

Nobody was injured.

A partial loss of engine power due to a crack in the No. 2 cylinder. 

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The commercial pilot was conducting an agricultural application flight. The pilot reported that, while maneuvering the airplane about 300 ft above ground level, the engine experienced a partial loss of power. Unable to maintain altitude, the pilot conducted an emergency landing to a field, during which the airplane landed hard and nosed over, coming to rest inverted. Postaccident examination of the engine revealed that the No. 2 cylinder head exhibited a circumferential crack of its barrel between the cooling fins. The Federal Aviation Administration had previously issued an airworthiness directive (AD) to address cylinder head cracking on the accident model engine. The AD required periodic visual inspections for cracks in the cylinder heads at specified intervals of time in service (every 100 hours for the accident airplane). According to the engine maintenance logbooks, the AD was last complied with about 35 hours before the accident. The previous inspections to this were sporadic, indicating that neither maintenance personnel nor the owner(s) were regularly complying with the AD.

Quoted verbatim from the NTSB record.