What was found
AUTOPILOT DISENGAGE BUTTON WILL NOT SILENCE AURAL A/P DISENGAGE TONE FROM EITHER YOKE. GROUNDED - YES. VERIFIED FAULT, FOUND C/B OPEN AT P18-1 WARN LIGHT (BAT) (D1). ACCOMP INSP OF C/B OPEN [18-1 GVI NO DEFECTS NOTED, CLOSED P18-1 & CLOSED C/B (D1). ACCOMP LAND VERIFY TEST, TEST PASS DFCS BITE GRP 49 ALL TEST PASS C/B STAYED CLOSED. REF B737-9 AMM 22-11-00-700-801, AMM 20-60-01-860-801 & B737-9 WDM 22-14-11-3.