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19971019031469A

Accident · Substantial damage
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FAA accident report · Cessna 150M · Miami, FL · October 19, 1997

FAA Aviation Safety Information Portal

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Date
October 19, 1997 · 10:30 local
Place
Miami, FL
Phase of flight
Fcd/Prec Ldg From Cruise
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N7814U
NTSB investigation
NTSBATL98LA003
Reported as
Cessna 150M
Reported engine
Continental O200A
People aboard
1
Fatal injuries
0
Pilot’s flight hours
190 total180 in this make and model
N7814URegistration cancelled Jan 22, 2001 · Cessna 150MS/N 15077847Airframe modelCessna 150M

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.

Engine began to run rough siezed. Right wing struck palmtree on golf course(.4)about 10 minutes into the flight, at a cruise altitude of 1000 feet, the pilot experienced a loss of engine power. He radioed a 'mayday' call and selected a nearby golf course for an emergency landing. The airplane collided with a palm tree during the emergency landing roll. Examination of the engine assembly revealed that number one cylinder lower spark plug was partially separated from the cylinder. During the subsequent engine teardown, the number one exhaust valve head was recovered from inside the cylinder. The examination also of the exhaust valve stem and the and the valve stem keepers showed excessive wear. The valve stem keepers had also separated from their normally installed positions. A review of the aircraft maintenance logs disclosed that the engine had undergone several major engine repairs, involving the valve assemblies, within the last ten years. An engine top overhaul was completed 370 hours before this accident. The engine had accumulated a total of 5,603 hours.

As the FAA filed it

ENGINE BEGAN TO RUN ROUGH SIEZED. RIGHT WING STRUCK PALMTREE ON GOLF COURSE(.4)ABOUT 10 MINUTES INTO THE FLIGHT, AT A CRUISE ALTITUDE OF 1000 FEET, THE PILOT EXPERIENCED A LOSS OF ENGINE POWER. HE RADIOED A 'MAYDAY' CALL AND SELECTED A NEARBY GOLF COURSE FOR AN EMERGENCY LANDING. THE AIRPLANE COLLIDED WITH A PALM TREE DURING THE EMERGENCY LANDING ROLL. EXAMINATION OF THE ENGINE ASSEMBLY REVEALED THAT NUMBER ONE CYLINDER LOWER SPARK PLUG WAS PARTIALLY SEPARATED FROM THE CYLINDER. DURING THE SUBSEQUENT ENGINE TEARDOWN, THE NUMBER ONE EXHAUST VALVE HEAD WAS RECOVERED FROM INSIDE THE CYLINDER. THE EXAMINATION ALSO OF THE EXHAUST VALVE STEM AND THE AND THE VALVE STEM KEEPERS SHOWED EXCESSIVE WEAR. THE VALVE STEM KEEPERS HAD ALSO SEPARATED FROM THEIR NORMALLY INSTALLED POSITIONS. A REVIEW OF THE AIRCRAFT MAINTENANCE LOGS DISCLOSED THAT THE ENGINE HAD UNDERGONE SEVERAL MAJOR ENGINE REPAIRS, INVOLVING THE VALVE ASSEMBLIES, WITHIN THE LAST TEN YEARS. AN ENGINE TOP OVERHAUL WAS COMPLETED 370 HOURS BEFORE THIS ACCIDENT. THE ENGINE HAD ACCUMULATED A TOTAL OF 5,603 HOURS.

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 ATL98LA003Accident · Minor injuriesLimited investigationFinal reportMiami, FLexcessive wear to the number one valve stem and valve stem keepers that resulted in the separation of the valve assembly.Oct 19, 1997 · Substantial damage

Other reports on N7814U · 1

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

Incident 19901017054859IFcd/Prec Ldg From Cruise · Cordele, GAEngine seized. Landed safely. NR2 cylinder swallowed intake and exhaust valves.Oct 17, 1990