MIA07CA033

NTSB accident investigation · Ryan Aeronautical ST3KR · Lake Butler, FL · January 6, 2007

Accident · Minor injuriesData collectionFinal report
Date
January 6, 2007, 12:00 local (17:00 UTC)
Place
Lake Butler, FL
Injuries
2 minor
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N56434Ryan Aeronautical ST3KR
Weather
Visual (VMC) · Day
Status
Completed · report March 26, 2007
Report
Approved by Office Director
FAA report
20070106000919A
Case key
65151

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

a partial loss of engine power due to a disconnected throttle control push-rod, which resulted in a forced landing and collision with trees and the ground.

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/malfCruise
Throttle/power lever,push/pull rod - disconnectedCause
Forced landingEmergency descent/landing
In flight collision with objectDescent - emergency
Object - tree(s)
In flight collision with terrain/waterDescent - emergency
Terrain condition - ground

Analysis

The pilot stated that the engine quit without warning and he had to make an emergency landing. He checked the fuel valve, the carburetor heat, and pumped the throttle but nothing seemed to help. During the landing, he was not sure if he clipped a tree during the approach and was slow to flare out, which they hit the ground hard causing him and the passenger to hit the instrument panel during the stop. The pilot recalled that the propeller was still turning during the impact. The pilot did not have any ideas why it quit. The pilot had been giving several rides prior to the accident flight with no problems. The inspection of the wreckage revealed that a short rod that connects the throttle control to the carburetor was lying disconnected inside the cowling. There were no marks on the rod, the bolt or the bracket that would indicate it was broken during impact. Once this rod is loosened, it would allow the engine to go to idle power.

Factual narrative

On January 6, 2007, about 1200 eastern standard time, a Ryan Aeronautical ST3KR, N56434, registered to and operated by an individual, impacted with a tree during a forced landing following a loss of engine power near Lake Butler, Florida, while on a Title 14 CFR Part 91 personal flight. Visual meteorological conditions prevailed at the time and no flight plan was filed. The airline transport-rated pilot and passenger received minor injuries; the airplane incurred substantial damage. The flight originated from the Flying Tiger Field Airport, Worthington, Florida, earlier that day, about 1150.

The pilot stated to the FAA inspector that the engine quit without warning and he had to make an emergency landing. He checked the fuel valve, the carburetor heat, and pumped the throttle but nothing seemed to help. During the landing, he was not sure if he clipped a tree during the approach and was slow to flare out, which they hit the ground hard causing him and the passenger to hit the instrument panel during the stop. The pilot recalls that the propeller was still turning during the impact. The pilot did not have any ideas why it quit. The pilot had been giving several rides prior to the accident flight with no problems.

The FAA inspector that conducted the post accident examination of the airplane wreckage stated, during the examination, a short rod that connects the throttle control to the carburetor was discovered lying unattached inside the cowling. It appears that this rod had come loose prior to impact. There were no marks on the rod, the bolt or the bracket that would indicate it was broken during impact. Once this rod is loosen, it would allow the engine to go to idle power.

Aircraft

Registration
N56434
Reported as
Ryan Aeronautical ST3KR
Category
Airplane
Serial number
1560
Engine
Kinner R-56, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
John B. Gordon
Registered owner
John B. Gordon
Airworthiness certificate
Standard, Normal
Departed
FL54 · Worthington, FL
Destination
KLCQ · Lake City, FL

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
74
Injuries
Minor
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 3
Flight hours
18,616 total · 33 in this make and model · 16 in the last 90 days · 12 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
240° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
79 °F, dew point 68 °F
Altimeter
30.10 inHg
Observed at
GNV

FAA reports on this event · 1

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