What was found
PERFORMED SOAP SAMBLE DUE TO FILTER BYPASSED. SAMPLE CAME BACK NORMAL. PERFORMED ANOTHER SOAP SAMPLE 50 HOURS LATER AND FILTER FAILED DELTA P-CHECK. RESULTS CAME BACK (INSPECT THIS ENGINE IMMEDIATELY). INSTALLED LOANER ENGINE. ORIGINAL ENGINE HAD NR1, NR3, NR4 AND NR5 CARBON SEALS REPLACED. REINSTALLED ORIGINAL ENGINE AFTER REPAIR. 25 HOUR SOAP SAMPLE RESULTS ARE NORMAL. PROBABLE CAUSE IS PREMATURE WEAR/FAILURE OF CARBON SEALS. RECOMMEND IMPROVING CARBON SEAL MATERIAL AND QUALITY. (K)