# Incident 19990528025789I: Piper PA28180, Tinley Park, IL, May 28, 1999

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: May 28, 1999, 23:15 local time
- Place: Tinley Park, IL
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 41.5668° N, 87.8026° W: Placed by OpenAirDocs: center of Tinley Park, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.5668&lon=-87.8026&mi=10
- Aircraft: N32506, registered now (https://openairdocs.org/aircraft/N32506) (OpenAirDocs)
- Registry model: Piper PA-28-180 (registry code 7102808, https://openairdocs.org/model/piper-pa-28-180) (OpenAirDocs)
- Registry engine: Lycoming O&VO-360 series (registry code 41514, https://openairdocs.org/engine/lycoming-o-vo-360-series) (OpenAirDocs)
- Reported make and model: PIPER PA28180
- Reported engine: LYC O360A4A
- People aboard: 1
- Fatal injuries: 0
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19990528025789I

## Narrative

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

(-23) THE PRELIMINARY INVESTIGATION CENTERED AROUND THE PILOT'S STATEMENT THAT HE HEARD A LOUD KNOCKING SOUND ELIMINATING FROM THE ENGINE COMPARTMENT. SHORTLY AFTER, THE ENGINE BEGAN TO EXPERIENCE SEVERE VIBRATION AND LOSS OF POWER.  RPM DROPPED TO 1100, OIL AND FUEL PRESSURE REMAINED NORMAL.  BUT, THE AIRCRAFT CONTINUED TO LOSE POWER AND ALTITUDE, FORCING THE PILOT TO SELECT AN EMERGENCY LANDING SITE.  THE INSPECTION OF THE ENGINE DISCLOSED NUMBER THREE EXHAUST STACK MOUNTING FLANGE AND SEVERAL OF THE CYLINDER STUDS BROKEN.  THE CARBURATOR AIR FILTER BOX WAS BLOWN OPEN AT THE SEAMS, IT APPEARS TO BE FROM ENGINE BACKFIRE.  ALL OF THE CYLINDER HAD NORMAL COMPRESSION AND THE ENGINE OIL SHOWED OBVIOUS SIGNS OF METALLIC PARTICLES.  RUB MARKS WERE NOTICED ON THE RIGHT LOWER ENGINE RUBBER MOUNT (LORD MOUNT) FROM HITTING THE GLANGE OF THE ENGINE'S STEEL MOUNTS.  IN ADDITION, THE MAGNETO'S IGNITION TIMING WERE NOTED AT 25 DEGREES B.T.D.C AND THE FUEL TANKS WERE 3/4 FULL.  THE PRELIMINARY INVESTIGATION POINTS TO A STUCK CYLINDER EXHAUST VALVE.

## Other reports on N32506 (1)

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

- [Accident 19780915041909A](https://openairdocs.org/incident/19780915041909A), Sep 15, 1978: Piper PA28180 (N32506), Milwaukee, WI, Substantial damage

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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