ATL94LA115

NTSB accident investigation · Cessna 172 · Flowery Branch, GA · June 7, 1994

Accident · No injuriesLimited investigationFinal report
Date
June 7, 1994, 15:10 local (19:10 UTC)
Place
Flowery Branch, GA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N3882LCessna 172
Weather
Visual (VMC) · Day
Status
Completed · report January 25, 1995
Report
Approved by Office Director
FAA report
19940607014129A
Case key
3397

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

On this page

Probable cause

The maintenance personnel's failure to properly secure the throttle linkage assembly that resulted in a reduction in engine power.

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.

Airframe/component/system failure/malfunctionManeuvering
Throttle/power lever,linkage - disconnectedCause
Maintenance,installation - improperOther maintenance personnelCause
Forced landingDescent - emergency
Nose overLanding - roll

Analysis

While cruising at 2300 feet, the pilot experienced a drop in engine RPM. The pilot reported that engine RPM dropped from 2500 to 1500; attempts by the pilot to restore full power failed. The pilot selected a nearby field for the forced landing. According to the pilot, he used the magneto switch to control the 1500 RPM available for the approach and forced landing. An examination of the engine assembly revealed that the throttle linkage at the carburetor was disconnected. According to the operator, the carburetor was overhauled and installed on the engine two flight hours before this accident. The throttle linkage is normally secured to the carburetor with a bolt, a nut,and a safety cotter pin; these items were not recovered for examination.

Factual narrative

On June 7, 1994, at 1510 eastern daylight time, a Cessna 172, N3882L, collided with the ground and nosed over after the pilot experienced throttle control problems near Flowery Branch, Georgia. The personal flight operated under 14 CFR Part 91 with no flight plan filed. Visual weather conditions prevailed at the time of the accident. The airplane was substantially damaged, and the pilot and passenger were not injured. The flight departed Cumming, Georgia, at 1445 hours.

According to the pilot, he and the passenger were sightseeing in the local flying area when the throttle failed to respond to inputs from the pilot. He further stated that engine rpm dropped to 1500 and he used the magneto switch to control engine power for the emergency landing.

An examination of the engine assembly revealed that the throttle control linkage was completely disconnected from the carburetor. According to the pilot, the carburetor had been overhauled and installed on the engine two hours before this flight.

Aircraft

Registration
N3882L
Reported as
Cessna 172
Category
Airplane
Serial number
17254051
Airframe hours
4,024
Engine
Continental O-300-D, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Mathis, Claudy J.
Registered owner
Pianowski, Steve
Airworthiness certificate
Standard, Normal
Last inspection
Annual · August 24, 1993 · 12 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
71
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left

Weather

Conditions
Visual (VMC) · Day
Wind
230° at 6 knots
Visibility
15 statute miles
Lowest ceiling
5,500 ft broken
Temperature
82 °F, dew point 68 °F
Altimeter
29.00 inHg
Observed at
PDK, 30 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 N3882L · 1

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