What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Experienced gradual loss of oil pressure in flight. Declared emergency and made precautionary landing on the beach. Discovered that rear bearing scavenge line was blocked. Engine was replaced and aircraft returned to service. This engine incorporates factory modifications to the rear bearing lubrication system that is supposed to make it unnecessary to perform periodic cleaning and inspection of rear bearing for coking. This is the second occurrence for this operator of oil system blockage as a result of coking of the rear bearing on the modified engines. This operator has decided to return to 1000 hour intervals for cleaning of rear bearing as required for unmodified engines. A service difficulty report has been submitted detailing the problems associated with the rear bearing coking of modified engines.
As the FAA filed it
(-23) EXPERIENCED GRADUAL LOSS OF OIL PRESSURE IN FLIGHT. DECLARED EMERGENCY AND MADE PRECAUTIONARY LANDING ON THE BEACH. DISCOVERED THAT REAR BEARING SCAVENGE LINE WAS BLOCKED. ENGINE WAS REPLACED AND AIRCRAFT RETURNED TO SERVICE. THIS ENGINE INCORPORATES FACTORY MODIFICATIONS TO THE REAR BEARING LUBRICATION SYSTEM THAT IS SUPPOSED TO MAKE IT UNNECESSARY TO PERFORM PERIODIC CLEANING AND INSPECTION OF REAR BEARING FOR COKING. THIS IS THE SECOND OCCURRENCE FOR THIS OPERATOR OF OIL SYSTEM BLOCKAGE AS A RESULT OF COKING OF THE REAR BEARING ON THE MODIFIED ENGINES. THIS OPERATOR HAS DECIDED TO RETURN TO 1000 HOUR INTERVALS FOR CLEANING OF REAR BEARING AS REQUIRED FOR UNMODIFIED ENGINES. A SERVICE DIFFICULTY REPORT HAS BEEN SUBMITTED DETAILING THE PROBLEMS ASSOCIATED WITH THE REAR BEARING COKING OF MODIFIED ENGINES.