What was found
APU RELIABILITY COLD START UNSUCCESSFUL AFTER 3 ATTEMPTS ST -52C FL370. APU INOP.(<P>TRANSFERRED TO MDDR # 147412 IAW MEL 49-11-01A, CAT C, DUE DATE 02JUN21. EH 1526Z.</P><P>ONT MX, 23MAY, LP 1476796, ITEM M4: REMOVED AND REPLACED DE-OIL SOLENOID VALVE IAW AMM 49-27-08. PREF. FIM 49-11 FT 958 APU OPERATES NORMALLY, HOWEVER APU BITE PROCEDURE PRODUCES A FAULT CODE "34" AT THE BOX. </P><P>ITEM M5: PERFORMED FIM TASK 49-11 FT 958 & RECEIVED FAULT CODE 34 ON ECU UNIT. PERFORMED INSPECTION OF STARTER IAW AMM 49-41-01, FOUND POSITIVE ELECTRICAL CABLE LOOSE. RE-SECURED IAW AMM 49-41-01. APU OPS CHECK PER AMM 49-11-00 CHECKED GOOD. NO DEFECTS NOTED. THIS CLEARS MDDR 147412. PLACARD REMOVED. MCC NOTIFIED. CD 0156Z</P>)