What was found
AIRCRAFT RETURN TO PLATFORM DURING ENGINES STARTING, THEY DID NOT STABILIZE IN LOW RPM AND THEY WERE SHUT DOWN. DURING REVISION NO ERROR EICAS MESSAGES WERE DETECTED AND PNEUMATIC PRESSURE OF APU WAS CORRECT. BOTH ENGINES WERE STARTED IAW MM, ALL TESTS CORRECT. DURING OVERNIGHT SERVICE, BOTH ENGINES WERE STARTED WITH IGNITION SYSTEMS 1 AND 2 IAW MM 71-00-00, ALL CORRECT.