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20140702017849A

Accident · Substantial damage
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FAA accident report · Piper PA-28-140 · Granbury, TX · July 2, 2014

FAA Aviation Safety Information Portal

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Date
July 2, 2014 · 08:40 local
Place
Granbury, TX
Phase of flight
Takeoff: Climb Out
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N9898W
NTSB investigation
NTSBCEN14LA334
Reported as
Piper PA-28-140
Reported engine
Lycoming 0-320 series
People aboard
2
Fatal injuries
0
Other injuries
0
Pilot’s certificates
Airline transport, flight instructor
Pilot’s flight hours
10,341 total250 in this make and model111 in the last 90 days
N9898WRegistration cancelled Apr 6, 2018 · Piper PA-28-140S/N 28-23418 · Built 1967Airframe modelPiper PA-28-140Engine 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.

N9898W departed rwy 14 Granbury regional airport (kgdj). On climb out at approximately 500 feet AGL the aircraft began to lose engine power. Student on the controls transfered control to instructor. Instructor attempted to return to the airport, but didn't have enough engine power to continue. N9898W landed in small clearing adjacent to highway approximately 1 NM east of Granbury regional. Pilot interviews were consistent with the aircraft having the engine lose power after takeoff. Aircraft was recovered to aircraft salvage of dallas. Waiting for NTSB to determine date of engine run and tear down analysis.

October 1, 2014: the engine run was conducted at aircraft salvage of dallas. The engine only produced a maximum of 1600 RPM at full throttle. A compression check was accomplished with the number 3 engine cylinder having zero compression. All other cylinders produced good compression. The cylinder head was removed, inspected and pictures taken.

The Lycoming engine had approximately 2040 hours on it smoh. The number 3 engine cylinder exhaust valve was broken and the head of the valve was located in the exhaust muffler. The number 3 engine exhaust valve rotator cap had evidence that it had stopped rotating the valve, due to carbon build-up, which would lead to a hot spot on the valve causing valve failure.

As the FAA filed it

N9898W DEPARTED RWY 14 GRANBURY REGIONAL AIRPORT (KGDJ). ON CLIMB OUT AT APPROXIMATELY 500 FEET AGL THE AIRCRAFT BEGAN TO LOSE ENGINE POWER. STUDENT ON THE CONTROLS TRANSFERED CONTROL TO INSTRUCTOR. INSTRUCTOR ATTEMPTED TO RETURN TO THE AIRPORT, BUT DIDN'T HAVE ENOUGH ENGINE POWER TO CONTINUE. N9898W LANDED IN SMALL CLEARING ADJACENT TO HIGHWAY APPROXIMATELY 1 NM EAST OF GRANBURY REGIONAL. PILOT INTERVIEWS WERE CONSISTENT WITH THE AIRCRAFT HAVING THE ENGINE LOSE POWER AFTER TAKEOFF. AIRCRAFT WAS RECOVERED TO AIRCRAFT SALVAGE OF DALLAS. WAITING FOR NTSB TO DETERMINE DATE OF ENGINE RUN AND TEAR DOWN ANALYSIS.

OCTOBER 1, 2014: THE ENGINE RUN WAS CONDUCTED AT AIRCRAFT SALVAGE OF DALLAS. THE ENGINE ONLY PRODUCED A MAXIMUM OF 1600 RPM AT FULL THROTTLE. A COMPRESSION CHECK WAS ACCOMPLISHED WITH THE NUMBER 3 ENGINE CYLINDER HAVING ZERO COMPRESSION. ALL OTHER CYLINDERS PRODUCED GOOD COMPRESSION. THE CYLINDER HEAD WAS REMOVED, INSPECTED AND PICTURES TAKEN.

THE LYCOMING ENGINE HAD APPROXIMATELY 2040 HOURS ON IT SMOH. THE NUMBER 3 ENGINE CYLINDER EXHAUST VALVE WAS BROKEN AND THE HEAD OF THE VALVE WAS LOCATED IN THE EXHAUST MUFFLER. THE NUMBER 3 ENGINE EXHAUST VALVE ROTATOR CAP HAD EVIDENCE THAT IT HAD STOPPED ROTATING THE VALVE, DUE TO CARBON BUILD-UP, WHICH WOULD LEAD TO A HOT SPOT ON THE VALVE CAUSING VALVE FAILURE.

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 CEN14LA334Accident · No injuriesLimited investigationFinal reportGranbury, TXThe partial loss of engine power due to the failure of the exhaust valve.Jul 2, 2014 · Substantial damage

Other reports on N9898W · 1

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

Accident 19761124035829AFinal Approach · Fayette, MOInstructor overshot on wet sod runway while demostrating soft field landing.Nov 24, 1976 · Substantial damage