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20000328012509A

Accident · Substantial damage
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FAA accident report · Univar A2AALON · Hernando, FL · March 28, 2000

FAA Aviation Safety Information Portal

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Date
March 28, 2000 · 12:43 local
Place
Hernando, FL
Airport
Twelve Oaks Airport
Phase of flight
To Init Climb(1st Pwr Reduct)
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N67HS
NTSB investigation
NTSBATL00LA039
Reported as
Univar A2AALON
Reported engine
Continental C9016F
Fatal injuries
0
Pilot’s flight hours
1,498 total850 in this make and model52 in the last 90 days

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-23) On March 28, 2000, at 0930 local time, alon-415-A2A, N67HS, registered toprivacy data omitted,developed engine problems and collided with trees after takeoff from Twelve Oaks, a private airport, Hernando, FL. While on a pleasure flight. Viaual meteorological conditions prevailed at this time. The a/c was substantially damaged and the pilot was seriously injured. (.4)according to the pilot, just after rotation the engine lost power and subsequently impacted trees between two homes. Examination of the engine found normal operational signatures throughout. Examination of the carburetor found that the carburetor accelerator pump did not operate when the throttle was opened. The carburetor was disassembled and the accelerator lower check valve was found contaminated with rusty debris. The acceleration leather plunger was found hard and red in color, similar to the rusty residue. The leather plunger did not fit tightly in the acceleration well. The carburetor bowl exhibited rusty residue in the lower portion. The float level was not measured, but visually appeared normal. Additionally, weather conditions were favorable for the formation of carburetor ice at the time of the acci dent.

As the FAA filed it

(-23) ON MARCH 28, 2000, AT 0930 LOCAL TIME, ALON-415-A2A, N67HS, REGISTERED TO^PRIVACY DATA^,DEVELOPED ENGINE PROBLEMS AND COLLIDED WITH TREES AFTER TAKEOFF FROM TWELVE OAKS, A PRIVATE AIRPORT, HERNANDO, FL. WHILE ON A PLEASURE FLIGHT. VIAUAL METEOROLOGICAL CONDITIONS PREVAILED AT THIS TIME. THE A/C WAS SUBSTANTIALLY DAMAGED AND THE PILOT WAS SERIOUSLY INJURED. (.4)ACCORDING TO THE PILOT, JUST AFTER ROTATION THE ENGINE LOST POWER AND SUBSEQUENTLY IMPACTED TREES BETWEEN TWO HOMES. EXAMINATION OF THE ENGINE FOUND NORMAL OPERATIONAL SIGNATURES THROUGHOUT. EXAMINATION OF THE CARBURETOR FOUND THAT THE CARBURETOR ACCELERATOR PUMP DID NOT OPERATE WHEN THE THROTTLE WAS OPENED. THE CARBURETOR WAS DISASSEMBLED AND THE ACCELERATOR LOWER CHECK VALVE WAS FOUND CONTAMINATED WITH RUSTY DEBRIS. THE ACCELERATION LEATHER PLUNGER WAS FOUND HARD AND RED IN COLOR, SIMILAR TO THE RUSTY RESIDUE. THE LEATHER PLUNGER DID NOT FIT TIGHTLY IN THE ACCELERATION WELL. THE CARBURETOR BOWL EXHIBITED RUSTY RESIDUE IN THE LOWER PORTION. THE FLOAT LEVEL WAS NOT MEASURED, BUT VISUALLY APPEARED NORMAL. ADDITIONALLY, WEATHER CONDITIONS WERE FAVORABLE FOR THE FORMATION OF CARBURETOR ICE AT THE TIME OF THE ACCI DENT.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB ATL00LA039Accident · Serious injuriesLimited investigationFinal reportHernando, FLLoss of power due to carburetor contamination. Factors, were the trees, and the weather conditions were conducive to carburetor icing.Mar 28, 2000 · Substantial damage