Grumman-Schweizer G-164B N6645Q

Summary

On 11 July 2006 at about 19:00 local time, a Grumman-Schweizer G-164B registered N6645Q, operated by TRI State Aero, was involved in an accident near Frederick, Maryland, 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

11 July 2006 at 19:00

Classification

Accident

Location

Frederick, Maryland, United States

Nearest airport

Frederick Municipal Airport (KFDK)

Coordinates

39.4175, -77.3742

Aircraft

Grumman-Schweizer G-164B

Registration

N6645Q

Category

Airplane

Engines

1

Operator

TRI State Aero

Operating rule

Part 91: General Aviation

Purpose of flight

Aerial Application

Phase of flight

Not recorded

Route

Fallston → Martinsburg

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

NYC06LA178

Nobody was injured.

A failure of the masterod, due to a hydraulic lock on a previous flight, which resulted in a total loss of engine power.

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

Read the full NTSB narrative

During cruise flight, the pilot of a Grumman-Schweizer G-164B airplane noted that the engine began to run rough, and shake violently. He also noted smoke coming from the exhaust. The engine subsequently lost power, and the pilot performed an emergency landing to a cornfield. During the landing, the airplane came to rest inverted, resulting in substantial damage. A post-accident examination of the engine revealed a fractured masterod. Deformation and damage to the masterod was consistent with being exposed to a hydraulic lock prior to the accident flight.

Quoted verbatim from the NTSB record.