MIA03LA123

NTSB accident investigation · Zenith 601HDS · Immokalee, FL · June 14, 2003

Accident · Minor injuriesLimited investigationFinal report
Date
June 14, 2003, 13:20 local (17:20 UTC)
Place
Immokalee, FL
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N601GZenith 601HDS
Weather
Visual (VMC) · Day
Status
Completed · report April 28, 2004
Report
Approved by Office Director
Parties
FAA FSDO
FAA report
20030614012159A
Case key
57365

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

Excessive rotor distributor shaft clearance that resulted in damage to the distributor rotor, a loss of ignition, the engine ceasing to operate. This resulted in a forced landing to unsuitable terrain and the airplane nosing over.

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/malfDescent - normal
Ignition system,distributor - loose part/bolt/nut/clamp/etcCause
Ignition system,distributor - separation
Ignition system - failureFactor
Forced landingDescent - emergency
Nose overLanding - roll
Terrain condition - muddy
Terrain condition - none suitable

Analysis

The pilot/owner stated that he is the builder of the airplane, and was in cruise flight, at an altitude of 2,900 feet, operating on the flywheel-triggered ignition system, collecting performance data. He said he began a descent, and at 2,600 feet, about 5.6 miles from his destination, the engine suddenly ceased operating. He said he switched to the distributor ignition, observed normal fuel pressure and verified that there was adequate fuel in the header tank. He said he then communicated his emergency to air traffic control, and again attempted to restart the engine using the starter with both ignitions, but was unable to get the engine to start. He then made an approach to land in a field and during the landing rollout, the airplane flipped over due to the soft muddy soil, incurring substantial damage to the aircraft. The pilot/owner stated that after the accident he examined the airplane to determine the reason the engine had ceased to operate, and he found that the distributor rotor had failed due to excessive shaft clearance. He said that the excessive clearance had allowed the rotor to wobble in its rotation, and contact the pins within the cap, which had resulted in the metal contact at the top, separating from the plastic base.

Factual narrative

On June 14, 2003, about 1320 eastern daylight time, a Zenith 601HDS amateur-built airplane, N601G, registered to and operated by a private individual, as a Title 14 CFR Part 91 personal flight, had the engine cease operating while in flight in Immokalee, Florida. Visual meteorological conditions prevailed and no flight plan was filed. The private-rated pilot received minor injuries and the airplane incurred substantial damage. The flight originated in Naples, Florida, the same day about 1300.

The pilot/owner stated that he is the builder of the airplane, and was in cruise flight, at an altitude of 2,900 feet, operating on the flywheel-triggered ignition system, collecting performance data. He said he began a descent, and at 2,600 feet, about 5.6 miles from his destination, the engine suddenly ceased operating. He said he switched to the distributor ignition, observed normal fuel pressure and verified that there was adequate fuel in the header tank. He said he then communicated his emergency to air traffic control, and again attempted to restart the engine using the starter with both ignitions, but was unable to get the engine to start. He then made an approach to land in a field and during the landing rollout, the airplane flipped over due to the soft muddy soil, incurring substantial damage to the aircraft.

The pilot/owner stated that after the accident he examined the airplane to determine the reason the engine had ceased to operate, and he found that the distributor rotor had failed due to excessive shaft clearance. He said that the excessive clearance had allowed the rotor to wobble in its rotation, and contact the pins within the cap, which had resulted in the metal contact at the top, separating from the plastic base.

Aircraft

Registration
N601G
Reported as
Zenith 601HDS
Category
Airplane, amateur-built
Serial number
6-3340
Airframe hours
175
Engine
Subaru EA81, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
George R. Fetzer
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · June 8, 2003 · 3 hours before
Departed
APF · Naples, FL
Destination
IMM · Immokalee, FL
Airport
APF · Immokalee

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
53
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
September 27, 2002
Seat
Left
Flight hours
288 total · 178 in this make and model · 239 as pilot in command · 22 in the last 90 days · 9 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
230° at 11 knots
Visibility
10 statute miles
Lowest ceiling
6,000 ft broken
Temperature
88 °F, dew point 75 °F
Altimeter
29.97 inHg
Observed at
APF

FAA reports on this event · 1

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