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1 engine of an small aircraft MEL aircraft was feathered after takeoff due to losing oil pressure caused by the oil drain plug falling out.
| Attributes | |
| ACN | 238658 |
| Time | |
| Date | 199304 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mwc |
| State Reference | WI |
| Altitude | agl bound lower : 700 agl bound upper : 700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : mwc tower : abq |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 2 Eng, Retractable Gear |
| Flight Phase | climbout : intermediate altitude climbout : initial |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 238658 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
During an annual inspection in which the owners were assisting in the work, the oil drain plug was left unsaftied. I did not service engine with oil, nor did I replace the drain plug. Another mechanic svced the oil, he and the owners then cowled up the engine. The aircraft flew 7.5 hours since the inspection and then the oil plug fell out at timmerman airport. Engine lost power and was feathered but landed without incident. The engine has been substantially damaged and will need overhaul before flight. I feel the cause of this incident was that the owners failed to properly install the plug. The other mechanic should have checked the plug when servicing the oil and I should have doublechked both of them before signing off the engine.
Original NASA ASRS Text
Title: 1 ENG OF AN SMA MEL ACFT WAS FEATHERED AFTER TKOF DUE TO LOSING OIL PRESSURE CAUSED BY THE OIL DRAIN PLUG FALLING OUT.
Narrative: DURING AN ANNUAL INSPECTION IN WHICH THE OWNERS WERE ASSISTING IN THE WORK, THE OIL DRAIN PLUG WAS LEFT UNSAFTIED. I DID NOT SVC ENG WITH OIL, NOR DID I REPLACE THE DRAIN PLUG. ANOTHER MECH SVCED THE OIL, HE AND THE OWNERS THEN COWLED UP THE ENG. THE ACFT FLEW 7.5 HRS SINCE THE INSPECTION AND THEN THE OIL PLUG FELL OUT AT TIMMERMAN ARPT. ENG LOST PWR AND WAS FEATHERED BUT LANDED WITHOUT INCIDENT. THE ENG HAS BEEN SUBSTANTIALLY DAMAGED AND WILL NEED OVERHAUL BEFORE FLT. I FEEL THE CAUSE OF THIS INCIDENT WAS THAT THE OWNERS FAILED TO PROPERLY INSTALL THE PLUG. THE OTHER MECH SHOULD HAVE CHKED THE PLUG WHEN SVCING THE OIL AND I SHOULD HAVE DOUBLECHKED BOTH OF THEM BEFORE SIGNING OFF THE ENG.
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.