As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE VIRBRATION 1.0 TO 1.1 GREATER THAN 1 MINUTE WHEN OPERATING AT MAX CONT THRUST. PERFORMED FAN TRIM BALANCE ON NR 1 ENGINE IAW ALASKA B737NG AMM 71 00 00 750 803 FOO. CHANGED NR 8 TO PO7 NR 18 TO PO7 NR 21 TO PO8 AND 28 TO PO8 USING NR T8484F. PERFORMED VIBRATION SURVEY OF NR 1 ENG IAW ALASKA 737NG AMM 71 00 00 700 814 FOO AND FOUND TO BE WITHIN LIMITS.