MKC82DA085

NTSB accident investigation · Grumman G-164A · Tekamah, NE · May 20, 1982

Accident · No injuriesFinal report
Date
May 20, 1982, 06:20 local (11:20 UTC)
Place
Tekamah, NE
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N7689Grumman G-164A
Weather
Visual (VMC) · Day
Status
Completed · report May 20, 1983
Report
Approved by Office Director
FAA report
19820520017549A
Case key
72800

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

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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 power(partial) - mech failure/malfManeuvering - aerial application
Engine assembly,camshaft - failure,totalCause
Engine assembly,valve,intake - movement restrictedCause
Engine assembly,valve,intake - openCause
Forced landingLanding
Nose overLanding - roll
Terrain condition - open fieldFactor
Terrain condition - softFactor

Analysis

On the third spray run the pilot stated that the aircraft engine had a loss of power. He attempted to fly back to the airport but was forced to make an emergency landing in an open field. During the landing roll the aircraft nosed over in the soft mud. Engine teardown revealed a camshaft roller, p/n 59-99, failed causing a valve to stick in the open position.

Aircraft

Registration
N7689
Reported as
Grumman G-164A
Category
Airplane
Serial number
921
Engine
P&W R-985-AN1, 450 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Har-Mor Ag Air, Inc.
Registered owner
Har-Mor Ag Air, Inc.
Departed
Tekamah, NE
Destination
Tekamah, NE
Airport
Tekamah, runway 14, 2,900 × 0 ft, concrete

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
42
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Flight hours
4,000 total · 55 in this make and model · 50 in the last 90 days · 50 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
135° at 3 knots
Visibility
3 statute miles
Lowest ceiling
3,000 ft broken
Temperature
154 °F

FAA reports on this event · 1

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