What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
During climb out from lns the crew noticed an odor then saw oil pressure falling. Crew declared an emergency and turned back to lns. While on left base the propeller rotation stopped. Aircraft landed safely at lns. Upon further inspection by maintenance, an elbow fitting attach point was found to be broken on the oil pressure tube, this allowed it to shift forward and expose the o-ring seal at the oil pressure tube causing a rapid loss of engine oil. The root cause of the part failure is unknown at this time. The operator has contacted the manufacturer about the part failure. The aircraft landed safely at Lancaster Airport (lns).
As the FAA filed it
DURING CLIMB OUT FROM LNS THE CREW NOTICED AN ODOR THEN SAW OIL PRESSURE FALLING. CREW DECLARED AN EMERGENCY AND TURNED BACK TO LNS. WHILE ON LEFT BASE THE PROPELLER ROTATION STOPPED. AIRCRAFT LANDED SAFELY AT LNS. UPON FURTHER INSPECTION BY MAINTENANCE, AN ELBOW FITTING ATTACH POINT WAS FOUND TO BE BROKEN ON THE OIL PRESSURE TUBE, THIS ALLOWED IT TO SHIFT FORWARD AND EXPOSE THE O-RING SEAL AT THE OIL PRESSURE TUBE CAUSING A RAPID LOSS OF ENGINE OIL. THE ROOT CAUSE OF THE PART FAILURE IS UNKNOWN AT THIS TIME. THE OPERATOR HAS CONTACTED THE MANUFACTURER ABOUT THE PART FAILURE. THE AIRCRAFT LANDED SAFELY AT LANCASTER AIRPORT (LNS).