SEA84LA133

NTSB accident investigation · Grumman G-164B-450 · Pullman, WA · June 14, 1984

Accident · Minor injuriesLimited investigationFinal report
Date
June 14, 1984, 15:55 local (22:55 UTC)
Place
Pullman, WA
Injuries
1 minor
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N6798QGrumman G-164B-450
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19840614026519A
Case key
39936

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine powerManeuvering - aerial application
Reason for occurrence undeterminedCause
Forced landingDescent - emergency
In flight collision with terrain/waterManeuvering - turn to landing area (emergency)
Terrain condition - risingFactor
Clearance - misjudgedPilot in commandCause
Diverted attentionPilot in command

Analysis

After making a swath run, the acft entered a steep turn with an airspeed of about 75 mph. According to two witnesses, the eng lost power & then the acft crashed. The plt was unable to remember what had happened from the time he entered the turn until he walked away from the crash. An exam of the accident site revealed that the acft had impacted near the ridge of upward sloping terrain, left wing 1st, then cartwheeled. An inspection of the eng was performed, but no reason for the power loss was found.

Aircraft

Registration
N6798Q
Reported as
Grumman G-164B-450
Category
Airplane
Serial number
310-B
Airframe hours
3,350
Engine
P&W R-1340-AN1, 600 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Aerial application · Part 137
Registered owner
Dennis Flying Service
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · February 4, 1984
Departed
NONE · Pullman, WA
Destination
NONE
Airport
None

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
57
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea, Multi-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
21,000 total · 2,800 in this make and model · 21,000 as pilot in command · 400 in the last 90 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
30 statute miles
Lowest ceiling
None
Temperature
75 °F, dew point 64 °F
Altimeter
30.00 inHg
Observed at
PUW, 6 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N6798Q · 1

Matched to the same aircraft by N-number and date.