# Incident 20160312002059I: Cessna 150M, Poplar Grove, IL, March 12, 2016

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: March 12, 2016, 11:17 local time
- Place: Poplar Grove, IL
- Damage: No damage
- Phase of flight: Climb
- Operating rules: General operating rules (Part 91)
- Location: 42.3491° N, 88.8418° W: Placed by OpenAirDocs: center of Poplar Grove, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.3491&lon=-88.8418&mi=10
- Aircraft: N63507, registered now (https://openairdocs.org/aircraft/N63507) (OpenAirDocs)
- Registry model: Cessna 150M (registry code 2071830, https://openairdocs.org/model/cessna-150m) (OpenAirDocs)
- Registry engine: Continental 0-200 series (registry code 17020, https://openairdocs.org/engine/continental-0-200-series) (OpenAirDocs)
- Reported make and model: CESSNA 150M
- Reported engine: CONT MOTOR 0-200 SERIES
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Airline transport
- Pilot flight hours: 32,000 total, 300 in this make and model, 55 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20160312002059I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

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.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft 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. For accidents, the NTSB's own investigation is the fuller record.

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