CHI07CA105

NTSB accident investigation · Pavliga Hatz CB-1 · Buffalo, MN · April 15, 2007

Accident · No injuriesData collectionFinal report
Date
April 15, 2007, 18:40 local (23:40 UTC)
Place
Buffalo, MN
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N899PPavliga Hatz CB-1
Weather
Visual (VMC) · Day
Status
Completed · report June 27, 2007
Report
Approved by Office Director
Parties
Federal Aviation Administration, Minneapolis FSDO
FAA report
20070415826499A
Case key
65748

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 loss of engine power due to the carburetor fuel flow valve becoming stuck in the closed position, which resulted in fuel starvation.

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 powerApproach - vfr pattern - downwind
Fuel system,carburetor - flow restrictedCause
Fluid,fuel - starvationCause
Forced landingEmergency descent/landing
In flight collision with terrain/waterEmergency descent/landing
Terrain condition - ditch

Analysis

The airplane impacted terrain during a forced landing following a total loss of engine power. The pilot reported that during the preflight inspection he visually inspected the fuel tank and no fuel contamination was detected from a gascolator fuel sample. The pilot performed three landings, but while on the downwind leg for the fourth landing "the engine abruptly stopped." Best glide speed was established and the airplane was maneuvered toward the runway for landing. The pilot reported that he "confirmed that carb heat was off and mixture full, rocked the wings and switched mags off and then on, in an attempt to restart the engine." The airplane "just cleared" the perimeter fence and touched down short of the runway in a ditch. The right main gear subsequently separated and the airplane rolled inverted. An on-scene inspection of the airplane indicated that there was sufficient fuel available in the fuel tank and a gascolator fuel sample was free of water and particulate contamination. Examination of the carburetor revealed that the carburetor fuel flow valve would stick in the closed position.

Factual narrative

The airplane impacted terrain during a forced landing following a total loss of engine power. The pilot reported that during the preflight inspection he visually inspected the fuel tank and no fuel contamination was detected from a gascolator fuel sample. The pilot performed three landings, but while on the downwind leg for the fourth landing "the engine abruptly stopped." Best glide speed was established and the airplane was maneuvered toward the runway for landing. The pilot reported that he "confirmed that carb heat was off and mixture full, rocked the wings and switched mags off and then on, in an attempt to restart the engine." The airplane "just cleared" the perimeter fence and touched down short of the runway in a ditch. The right main gear subsequently separated and the airplane rolled inverted. An on-scene inspection of the airplane indicated that there was sufficient fuel available in the fuel tank and a gascolator fuel sample was free of water and particulate contamination. Examination of the carburetor revealed that the carburetor fuel flow valve would stick in the closed position.

Aircraft

Registration
N899P
Reported as
Pavliga Hatz CB-1
Category
Airplane, amateur-built
Serial number
313
Airframe hours
668
Engine
Lycoming O-235-C1, 115 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · November 1, 2006
Departed
CFE · Buffalo, MN
Destination
CFE
Airport
CFE · Buffalo Municipal Airport, runway 35, 2,600 × 60 ft, asphalt

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
52
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land, Single-engine sea
Medical
Class 3, With waivers/limitations
Last flight review
February 1, 2007
Seat
Rear
Flight hours
716 total · 140 in this make and model · 660 as pilot in command · 18 in the last 90 days · 8 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 41 °F
Altimeter
29.98 inHg
Observed at
CFE

FAA reports on this event · 1

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