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Small transport aircraft operating as air taxi in cruise in micronesia had right engine failure due to #4 cylinder head separation from barrel.
| Attributes | |
| ACN | 395597 |
| Time | |
| Date | 199802 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : yap |
| State Reference | FO |
| Altitude | agl bound lower : 5500 agl bound upper : 5500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air taxi |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 135 |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : instrument pilot : cfi |
| Experience | flight time last 90 days : 180 flight time total : 16500 flight time type : 7500 |
| ASRS Report | 395597 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency none taken : unable |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Shortly after leveling off, the failure occurred in the right engine, resulting in rough running. A precautionary shutdown of the engine was performed. The remaining flight was uneventful and a safe landing was made. Investigation revealed that the cylinder head on #4 cylinder had separated from the barrel completely. The cylinder remained in place. Engine oil was not contaminated. Airworthiness directive 78-08-07 applies to this condition. I suggest inspection for blow by before each flight instead of the 100 hour interval as per airworthiness directive. Note: the engine was installed 69 hours ago. It had undergone a complete overhaul.
Original NASA ASRS Text
Title: SMT ACFT OPERATING AS AIR TAXI IN CRUISE IN MICRONESIA HAD R ENG FAILURE DUE TO #4 CYLINDER HEAD SEPARATION FROM BARREL.
Narrative: SHORTLY AFTER LEVELING OFF, THE FAILURE OCCURRED IN THE R ENG, RESULTING IN ROUGH RUNNING. A PRECAUTIONARY SHUTDOWN OF THE ENG WAS PERFORMED. THE REMAINING FLT WAS UNEVENTFUL AND A SAFE LNDG WAS MADE. INVESTIGATION REVEALED THAT THE CYLINDER HEAD ON #4 CYLINDER HAD SEPARATED FROM THE BARREL COMPLETELY. THE CYLINDER REMAINED IN PLACE. ENG OIL WAS NOT CONTAMINATED. AIRWORTHINESS DIRECTIVE 78-08-07 APPLIES TO THIS CONDITION. I SUGGEST INSPECTION FOR BLOW BY BEFORE EACH FLT INSTEAD OF THE 100 HR INTERVAL AS PER AIRWORTHINESS DIRECTIVE. NOTE: THE ENG WAS INSTALLED 69 HRS AGO. IT HAD UNDERGONE A COMPLETE OVERHAUL.
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.