What was found
APU TRU INOP (APU TRU DEACTIVATED) TRANSF TO MDDR NR 134359 CAT "D" PER DDG 24-32-01B DUE 11 JAN 21. PLACARD INSTALLED, MX ACTION COMPLIED WITH DP 1315Z). R & R APU TRU, AS PER AMM 24-32-00. PERFORMED OPERATIONAL CHECK OF APU TRU START, PER AMM 24-32-04 AND FOUND OK. THIS CLEARS DMI NR 134359, PLACARDS REMOVED, MCC ADVICED T, ZH AT 2040Z.