As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM AS A CONSEQUENCE OF DURING RIGHT ENGINE STARTED, THE A AND B IGNITION SYSTEM DID NOT HAVE ROTATION IN N1 AND N2 AND HYDRAULIC PRESSURE DID NOT INCREASE. DURING REVISION, THE RIGHT ENGINE WAS STARTED WITH NEGATIVES RESULTS, STARTER VALVE LIGHT TURNED ON AND OSCILLATION OF PNEUMATIC PRESSURE WITHOUT ROTATION. THE ENGINE AIR TURBINE STARTER WAS REPLACED IAW MM 80-10-01, TESTED CORRECT.