As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER EXT START OF NBR 2 A CROSSBLEED START WAS ATTEMPTED BOTH APU VALVE AND RT ENG VALVE EXTINGUISHED UNTIL LEFT ENG WENT TO START THEN BOTH VALVES CLOSED AND HAD ZERO PRESSURE(<P>TRANSFER TO DMI 145350 PER MEL 80-00-02-01 CAT "C".</P><P>17APR21 - LP 1444115 - ITEM M11 - AFW - PERFORMED ENGINE STARTING OPERATIONAL TEST IAW AMM 80-11-00 OPS CHECK GOOD. THIS CLEARS MDDR# 145350.</P>)