As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU PNEUMATIC FUNCTION INOP( DUCT PRESS TOO LOW)(<P>TRANSFERRED TO MDDR 132716 AS PER MEL 49-11-01-01 CAT C.<BR /></P><P><BR DATA-MCE-BOGUS="1" /></P><P>REMOVED AND REPLACED APU ECU THEN OPERATED CHECK OK PER AMM 49-61-05/401. CLEARED MDDR 132716. NOTIFIED MCC. REACTIVATED CMM PROCEDURE</P>)