As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU DOES NOT INCREASE PNEUMATIC PRESSURE ON ENGINE START.(<P>TRANSFERRED APU PNEUMATIC FUNCTION TO DMI 126477 PER B767 DDG 49-11-01-01, CAT "C" DUE 10APR2020.</P><P>REF LOG PAGE 1232005 ITEM M4: REMOVED AND REPLACED SURGE CONTROL VALVE IAW AMM 49-53-01. OPS TEST NORMAL, ALL INDICATIONS NORMAL. PERFORMED DRY MOTOR OF ENGINE 1 IAW AMM 71-00-00, DUCT PRESSURE @ 37 PSI. THIS ACTION CLEARS DMI 126477. </P>)