What was found
WHEN LEVELING AT 31,000 FT JAMMED STAB AMBER WARNING ON MFDU. PERFORMED AFCAS TEST IAW AMM 22-11-00, NO FAULTS FOUND. OPERATIONAL CHECK OF FLIGHT CONTROL SERVO VALVES STICKING CIRCUIT IAW AMM 27-00-00 AND OPERATIONAL TEST OF STABILIZER JAM SWITCH IAW AMM 27-43-00, NO FAULTS FOUND. CLEANED AND REINSTALLED JAM SWITCH CANNON PLUG, ALL OPS CHECKS GOOD.