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19980425013299A

Accident · Substantial damage
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FAA accident report · Cessna 172N · Parker, CO · April 25, 1998

FAA Aviation Safety Information Portal

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Date
April 25, 1998 · 13:30 local
Place
Parker, CO
Phase of flight
Forced Landing
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N6356D
NTSB investigation
NTSBFTW98LA198
Reported as
Cessna 172N
Reported engine
Lycoming O320H2AD
People aboard
2
Fatal injuries
0
Pilot’s flight hours
7,300 total5,000 in this make and model79 in the last 90 days
N6356DRegistration cancelled Aug 3, 2012 · Cessna 172NS/N 17272742 · Built 1979Airframe modelCessna 172NEngine modelLycoming 0-320 seriesReciprocating

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 lost power on dual flight. Landed in muddy field. Nosed over. (.4)the instructor pilot (CFI) said that after completing a local instructional flight, he and his student entered an extended right base for runway 35R, about 5 miles southeast of the airport. He 'suddenly heard the engine lose a major portion of power.' While performing an emergency check of the instruments, the instructor noted that the engine power had dropped to 1,800 RPM. Realizing they would be unable to glide to the airport due to the loss of engine power, the CFI executed an emergency landing on a field near a golf course. The ground was muddy due to an accumulation of rain and snow from the previous night. After the airplane traveled a short distance, the nose wheel struck a rut, and the airplane nosed over. Examination of the aircraft engine revealed that the #1 (right front) cylinder intake pushrod was bent. After removing the valve cover, a stud that anchored the #1 exhaust valve rocker arm was found to be fractured, and the #1 exhaust valve was in the closed position. There was no damage to the valve lifters or camshaft. (-23)during instructional flight engine began to loose power. When instructor realized that he could not make it back to airport he landed in field. The field was extremely muddy and the nose wheel dug into mud and aircraft flipped over.

As the FAA filed it

ENGINE LOST POWER ON DUAL FLIGHT. LANDED IN MUDDY FIELD. NOSED OVER. (.4)THE INSTRUCTOR PILOT (CFI) SAID THAT AFTER COMPLETING A LOCAL INSTRUCTIONAL FLIGHT, HE AND HIS STUDENT ENTERED AN EXTENDED RIGHT BASE FOR RUNWAY 35R, ABOUT 5 MILES SOUTHEAST OF THE AIRPORT. HE 'SUDDENLY HEARD THE ENGINE LOSE A MAJOR PORTION OF POWER.' WHILE PERFORMING AN EMERGENCY CHECK OF THE INSTRUMENTS, THE INSTRUCTOR NOTED THAT THE ENGINE POWER HAD DROPPED TO 1,800 RPM. REALIZING THEY WOULD BE UNABLE TO GLIDE TO THE AIRPORT DUE TO THE LOSS OF ENGINE POWER, THE CFI EXECUTED AN EMERGENCY LANDING ON A FIELD NEAR A GOLF COURSE. THE GROUND WAS MUDDY DUE TO AN ACCUMULATION OF RAIN AND SNOW FROM THE PREVIOUS NIGHT. AFTER THE AIRPLANE TRAVELED A SHORT DISTANCE, THE NOSE WHEEL STRUCK A RUT, AND THE AIRPLANE NOSED OVER. EXAMINATION OF THE AIRCRAFT ENGINE REVEALED THAT THE #1 (RIGHT FRONT) CYLINDER INTAKE PUSHROD WAS BENT. AFTER REMOVING THE VALVE COVER, A STUD THAT ANCHORED THE #1 EXHAUST VALVE ROCKER ARM WAS FOUND TO BE FRACTURED, AND THE #1 EXHAUST VALVE WAS IN THE CLOSED POSITION. THERE WAS NO DAMAGE TO THE VALVE LIFTERS OR CAMSHAFT. (-23)DURING INSTRUCTIONAL FLIGHT ENGINE BEGAN TO LOOSE POWER. WHEN INSTRUCTOR REALIZED THAT HE COULD NOT MAKE IT BACK TO AIRPORT HE LANDED IN FIELD. THE FIELD WAS EXTREMELY MUDDY AND THE NOSE WHEEL DUG INTO MUD AND AIRCRAFT FLIPPED OVER.

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 FTW98LA198Accident · No injuriesLimited investigationFinal reportParker, COa fractured #1 exhaust valve rocker arm stud, which subsequently resulted in loss of engine power and a forced landing. The lack of suitable terrain in the forced landing area was a related factor.Apr 25, 1998 · Substantial damage

Other reports on N6356D · 2

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

Accident 19900427013029ARoll-Out (Fixed Wing) · Denver, COWind gusty on final due approaching front then reversed and blew over aircraft on landing roll after slowing down.Apr 27, 1990 · Substantial damageAccident 19881206053069ALevel Off Touchdown · Denver, COStudent bounced, added power and nosed up. Took off power, hit runway, and veered into parked aircraft.Dec 6, 1988 · Substantial damage