What was found
PDIS 857 05-50 9138 13NOV19 SEA OPEN U LOGPAGES:3182688 FLEW INTO A VERY THIN, RAGGED VOLCANIC ASH CLOUD @ FL340 AT APPROX 2350Z NOTICED A SMALL, BUT STEADY EGT CLIMB AT A FIXED N1. EGT MAXED OUT AT 710 DEGREES BEFORE MAEUVERING OUT OF CLOUD. EVERYTHING RETURNED TO NORMAL SHORTLY THERE AFTER. NO ALERTS WERE NOTED. COMPLIED WITH PHASE IA GENERAL VISUAL INSPECTION IAW AMM 05-51-31-2 AND AMM 71-00-00-6. NO DEFECTS NOTED. A/C OK FOR SERVICE. FACT 13NOV19 06:24 SEA MAINT MANUAL UPDATE.