What was found
JUST AFTER T/O AIR SYS 2 OFF WITH FLICKERING MANIFOLD FAIL LIGHT. POWER BACK FOR DESCENT AND FLICKERING MANIFOLD LIGHT WENT AWAY. ACN RELEASED FOR SERVICE PER MEL/CDL: 36-23-01-02 NR 2 MANIFOLD FAIL DETECTION LOOP INOP. DO NOT PRESSURIZE PNEUMATIC SYS NR 2 EXCEPT FOR ENG START. T/S IAW FIM FAULT CODE 36-23-09. AT MFDC CONNECTOR PIN -E- TO GRD SHOWS 128 OHMS. FOUND LOOPS D1-28B AND D1-28 CONN HAD LOOSE INSULATOR CAUSING SHORT. REPOSITIONED INSULATOR, STRAIGHTEN PIN. SYSTEM RESISTANCE OPEN ON PINS E, F AND -X- OF MFDC CONN AIU 2 RTS PASSED IAW MM 31-43-02. REMOVED AND REPLACED LOOP D1-28B PER MD10 AMM 36-23-02-4. TEST OF NR 2 ENG PNEU SYSTEM MM 36-00-03-5. TEST CHECKED GOOD.