What was found
DURING RIGHT ENGINE START, DUCT PRESSURE OSCILLATED BETWEEN 16 TO 18 PSI. N2 MAX MOTORING WAS 18.3%. TRANSFERRED TO MDDR 117406 IAW MEL 49-11-01-01, CAT "C". LP 1116286 - M3: PERFORMED THE PUSH AND PULL TEST ON IGV IAW AMM 49-52-02 (TEST GOOD), PERFORMED CHIP DETECTED INSPECTION IAW AMM 49-27-04. (NO METAL FOUND) LP 1116293 M1: REOPENED MDDR 117406 PER MEL 49-11-01-01. LP 1210811 - M2: TROUBLESHOOT APU BLEED DUCT. PRESSURE HOLD 30+ WITHOUT ADP. WHEN ADP BUTTON ON AUTO, WILL DROP DOWN TO 16. TESTED THE VOLTAGE D488 ON MODULATING PINS 2 AND 3. BOTH SHOW 28V. ADP MODULATING VALVE NEEDS REPLACEMENT. IAW FIM 29-11 FLT TREE 839. DMI REMAINS OPEN. LP 1210813 - M5: DEFERRED ADP AUTO FUNCTION. APU BLEED OPS CHECKS NORMAL IAW AMM 49-11-00. THIS CLEARS MDDR #117406. MCC NOTIFIED AND PLACARD REMOVED.