As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS - CAPT HSI FLICKERED ON AFTER ENG START. SELECTION OF ALT EFI RESULTED IN NO CHANGE, FLICKERING STOPPED AFTER APPROX 1 MINUTE. REPLACED CAPT EHSI OPS CK OK IAW MM 34-22-04. PERFORMED MCDP TEST 30 TEST PASSED. ACFT REMAINS IN LAND 3 LMP STATUS.