Narrative:

With 2 souls on board as passenger, pilot, cfii in right seat, owner/pilot in left seat, on IFR flight ZZZ to mcallen, tx (ZZZ to mfe). (Cfii PIC.) aircraft lost oil in #1 engine (front), apparently due to break in oil hose feeding front propeller. This was third flight of the day for this aircraft. After each flight, oil levels had been checked in front engine. 3 persons at ZZZ checked front engine oil level before this flight -- line man at FBO, and both pilots. All had verified 7 quarts level (standard amount, 10 quarts being maximum). No oil pressure anomalies had been seen until incident occurred. Crp approach offered rockport as alternate (8 mi), but we chose crp because it was manned, had approach lighting, and emergency services available (22 mi). Landed without incident, but fire truck on taxiway thought smoke coming out of airplane, so exited aircraft to await all clear. Supplemental information from acn 514628: at approximately XA50 on jun/xa/01, while flying on an IFR flight plan to mcallen, tx and about 30 mi from crp, the engine (front) began to run rough. The pilot shut down the engine and feathered the propeller. We flew on the rear engine to crp and landed without incident. A loss of oil pressure was observed at the time of roughness of the engine. ATC was most helpful in providing advice and assistance. Supplemental information from acn 514627: engine stoppage due to loss of oil pressure, aircraft not available at this time for detailed inspection. Rptedly oil line from accumulator to propeller failed, perhaps due to hose abrasion between engine mount and cowling.

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Original NASA ASRS Text

Title: C336 HAD AN ENG FAILURE DUE TO OIL STARVATION FROM A LEAKING OIL LINE TO THE PROP GOVERNOR.

Narrative: WITH 2 SOULS ON BOARD AS PAX, PLT, CFII IN R SEAT, OWNER/PLT IN L SEAT, ON IFR FLT ZZZ TO MCALLEN, TX (ZZZ TO MFE). (CFII PIC.) ACFT LOST OIL IN #1 ENG (FRONT), APPARENTLY DUE TO BREAK IN OIL HOSE FEEDING FRONT PROP. THIS WAS THIRD FLT OF THE DAY FOR THIS ACFT. AFTER EACH FLT, OIL LEVELS HAD BEEN CHKED IN FRONT ENG. 3 PERSONS AT ZZZ CHKED FRONT ENG OIL LEVEL BEFORE THIS FLT -- LINE MAN AT FBO, AND BOTH PLTS. ALL HAD VERIFIED 7 QUARTS LEVEL (STANDARD AMOUNT, 10 QUARTS BEING MAX). NO OIL PRESSURE ANOMALIES HAD BEEN SEEN UNTIL INCIDENT OCCURRED. CRP APCH OFFERED ROCKPORT AS ALTERNATE (8 MI), BUT WE CHOSE CRP BECAUSE IT WAS MANNED, HAD APCH LIGHTING, AND EMER SVCS AVAILABLE (22 MI). LANDED WITHOUT INCIDENT, BUT FIRE TRUCK ON TXWY THOUGHT SMOKE COMING OUT OF AIRPLANE, SO EXITED ACFT TO AWAIT ALL CLR. SUPPLEMENTAL INFO FROM ACN 514628: AT APPROX XA50 ON JUN/XA/01, WHILE FLYING ON AN IFR FLT PLAN TO MCALLEN, TX AND ABOUT 30 MI FROM CRP, THE ENG (FRONT) BEGAN TO RUN ROUGH. THE PLT SHUT DOWN THE ENG AND FEATHERED THE PROP. WE FLEW ON THE REAR ENG TO CRP AND LANDED WITHOUT INCIDENT. A LOSS OF OIL PRESSURE WAS OBSERVED AT THE TIME OF ROUGHNESS OF THE ENG. ATC WAS MOST HELPFUL IN PROVIDING ADVICE AND ASSISTANCE. SUPPLEMENTAL INFO FROM ACN 514627: ENG STOPPAGE DUE TO LOSS OF OIL PRESSURE, ACFT NOT AVAILABLE AT THIS TIME FOR DETAILED INSPECTION. RPTEDLY OIL LINE FROM ACCUMULATOR TO PROP FAILED, PERHAPS DUE TO HOSE ABRASION BTWN ENG MOUNT AND COWLING.

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.