What was found
ON TAKE-OFF ROLL ELEC 2 HYDRAULIC LOW PRESSURE LIGHT ILLUMINATED. GROUNDED - YES. FOUND C/B C881 (F3) IN P92 PANEL OUT. INSPECTED HYD PUMP D02664 + NO DEFECTS FOUND RESET C/B REF B737-9 AMM 20-60-01. C/B POPPED WIEN "A" SYS ELEC 2 SWITCH TURNED ON. C/B DOES NOT POP WITH CONNECTOR D02664 DISCONNECTED. REMOVED AND REPLACED "A" SYSTEM EMDP REF AMM 29-11-21. FUNCTIONAL TEST FAILED C/B C881 (F3) IN P92 PANEL OUT. REF B737-9 SSM 24-51-21, FOUND 20VAC AT T1 OF R317 RELAY. 115VAC AT T2+T3. FOUND OPEN BETWEEN T1 OF R643 RELAY AND T3 OF R317. STARTED REMOVING P92 PANEL REF AMM 24-21-21 UP TO STEP 2(G)(1)(A). COMPLETED REMOVAL OF P92 REF AMM 24-21-21. INSTALLED P92 PANEL, EXCEPT FOR CONN'S ON OB FWD SIDE OF PANEL, REF AMM 24-21-21. INSTALLATION TESTS REQ'D. COMPLETED INSTALL AND OP-CHECKS OF P92 PANEL REF AMM 24-21-21. ALL TESTS NOW NORMAL. HYDRAULICS CHECK GOOD REF AMM 29-11-00.