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A cessna 150 with a lycoming 0320 engine had the wrong type piston rings installed causing extensive engine damage due to vendor part mislabeling.
| Attributes | |
| ACN | 400043 |
| Time | |
| Date | 199804 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : instructional |
| Make Model Name | Cessna 150 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | other personnel |
| Qualification | other other : other |
| ASRS Report | 400043 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
This author installed cerminil rings to fit cerminil cylinder assemblies. After 2 hours piston rings removed metal from cylinder walls and contaminated engine. Discussed this problem with supplier and he is looking into vendor problem, with possible mis-identification of part number. This mis-identification caused incorrect ring material against cylinder wall. Callback conversation with reporter revealed the following information: the reporter stated that what was labeled as cerminil piston rings were installed in cerminil cylinders and after two hours of running the engine exhibited metal transfer from the cylinder walls. The reporter said extensive damage was done to the engine and had to be torn down completely and the case split. The reporter stated the vendor of the piston rings suspects the rings were mislabeled and is conducting an investigation.
Original NASA ASRS Text
Title: A CESSNA 150 WITH A LYCOMING 0320 ENGINE HAD THE WRONG TYPE PISTON RINGS INSTALLED CAUSING EXTENSIVE ENGINE DAMAGE DUE TO VENDOR PART MISLABELING.
Narrative: THIS AUTHOR INSTALLED CERMINIL RINGS TO FIT CERMINIL CYLINDER ASSEMBLIES. AFTER 2 HRS PISTON RINGS REMOVED METAL FROM CYLINDER WALLS AND CONTAMINATED ENGINE. DISCUSSED THIS PROBLEM WITH SUPPLIER AND HE IS LOOKING INTO VENDOR PROBLEM, WITH POSSIBLE MIS-IDENTIFICATION OF PART NUMBER. THIS MIS-IDENTIFICATION CAUSED INCORRECT RING MATERIAL AGAINST CYLINDER WALL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT WHAT WAS LABELED AS CERMINIL PISTON RINGS WERE INSTALLED IN CERMINIL CYLINDERS AND AFTER TWO HOURS OF RUNNING THE ENGINE EXHIBITED METAL TRANSFER FROM THE CYLINDER WALLS. THE RPTR SAID EXTENSIVE DAMAGE WAS DONE TO THE ENGINE AND HAD TO BE TORN DOWN COMPLETELY AND THE CASE SPLIT. THE RPTR STATED THE VENDOR OF THE PISTON RINGS SUSPECTS THE RINGS WERE MISLABELED AND IS CONDUCTING AN INVESTIGATION.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.