ATL93LA132

NTSB accident investigation · Grumman G-164A · Atmore, AL · July 23, 1993

Accident · No injuriesLimited investigationFinal report
Date
July 23, 1993, 10:00 local (15:00 UTC)
Place
Atmore, AL
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N4824Grumman G-164A
Weather
Visual (VMC) · Day
Status
Completed · report July 25, 1994
Report
Approved by Office Director
FAA report
19930723025479A
Case key
3243

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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Probable cause

The total failure of the engine supercharger, which resulted in engine stoppage. A factor was the rough terrain at the forced landing site.

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(total) - mech failure/malfClimb - to cruise
Eng assembly,blower/impeller/integral supercharger - failure,totalCause
Forced landingDescent - emergency
Nose overLanding - roll
Terrain condition - rough/unevenFactor

Analysis

The ag pilot reported that the engine lost power about 1 mile past the departure airstrip. The aircraft cleared some trees and power lines, and was force landed in a corn field. The aircraft nosed over on the rough terrain. An examination of the engine revealed that the supercharger assembly had failed.

Factual narrative

On July 23, 1993, at about 1000 central daylight time, a Grumman G-164A, N4824, nosed over during landing following a reported engine power loss near Atmore, Alabama. The commercial pilot was not injured. The aircraft was substantially damaged. The aircraft was operated under 14 CFR Part 137 by Wallace Flying Service, Inc., of Atmore. Visual meteorological conditions prevailed at the time, and no flight plan was filed for the local, aerial application flight. The flight was originating at the time of the accident.

The pilot reported the following: He took off on runway 27 and turned toward the west-southwest. At about one mile from the airstrip, and over a wooded area, the engine lost power. He force landed the airplane in a corn field after clearing power lines. After touchdown, the aircraft nosed over on the rough terrain.

The aircraft was recovered to the operator's facility following the accident. A partial disassembly of the engine revealed that the supercharger assembly had failed.

Aircraft

Registration
N4824
Reported as
Grumman G-164A
Category
Airplane
Serial number
1101
Airframe hours
6,539
Engine
P&W R-1340-AN-1, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Wallace Flying Service, Inc.
Registered owner
Wallace Flying Service, Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · March 6, 1993 · 95 hours before

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
51
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
9,500 total · 495 in this make and model · 9,400 as pilot in command · 95 in the last 90 days · 40 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
340° at 11 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
86 °F, dew point 75 °F
Altimeter
30.00 inHg
Observed at
MOB, 42 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 N4824 · 1

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