20160312002059I

Incident · No damage

FAA incident report · Cessna 150M · Poplar Grove, IL · March 12, 2016

Date: March 12, 2016 · 11:17 local
Place: Poplar Grove, IL
Phase of flight: Climb
Operating rules: General operating rules (Part 91)
Damage: No damage
Aircraft: N63507
Reported as: Cessna 150M
Reported engine: Continental 0-200 series
People aboard: 2
Fatal injuries: 0
Other injuries: 0
Pilot’s certificate: Airline transport
Pilot’s flight hours: 32,000 total300 in this make and model55 in the last 90 days

N63507Registered now · Cessna 150MS/N 15077356 · Built 1975 Airframe modelCessna 150M Engine modelContinental 0-200 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.

N63507 departed casa de aero park airport (68IS) hampshire, IL on a dual instruction flight. About three miles east of Poplar Grove airport (C77) Poplar Grove, IL the pilots heard a loud thump which resulted in a drop of RPM. They turned the aircraft towards the nearest airport. The aircraft continued to make the thumping sound every 2-4 seconds and the rpm's continued to drop. The pilots put the aircraft down in a winter wheat field without incident. No injuries, no damage to the aircraft. The wings were removed and the aircraft was trailered to Poplar Grove airport (C77). Inspecting the engine for cause of loss of power, cylinder number two, the three rocker shaft retaining bosses were broken and the intake and exhaust rockers were no longer opening the valves.

As the FAA filed it

N63507 DEPARTED CASA DE AERO PARK AIRPORT (68IS) HAMPSHIRE, IL ON A DUAL INSTRUCTION FLIGHT. ABOUT THREE MILES EAST OF POPLAR GROVE AIRPORT (C77) POPLAR GROVE, IL THE PILOTS HEARD A LOUD THUMP WHICH RESULTED IN A DROP OF RPM. THEY TURNED THE AIRCRAFT TOWARDS THE NEAREST AIRPORT. THE AIRCRAFT CONTINUED TO MAKE THE THUMPING SOUND EVERY 2-4 SECONDS AND THE RPM'S CONTINUED TO DROP. THE PILOTS PUT THE AIRCRAFT DOWN IN A WINTER WHEAT FIELD WITHOUT INCIDENT. NO INJURIES, NO DAMAGE TO THE AIRCRAFT. THE WINGS WERE REMOVED AND THE AIRCRAFT WAS TRAILERED TO POPLAR GROVE AIRPORT (C77). INSPECTING THE ENGINE FOR CAUSE OF LOSS OF POWER, CYLINDER NUMBER TWO, THE THREE ROCKER SHAFT RETAINING BOSSES WERE BROKEN AND THE INTAKE AND EXHAUST ROCKERS WERE NO LONGER OPENING THE VALVES.