What was found
AUTOPILOT (C) FAILED AT FL380. UNABLE TO RE-ENGAGE THE C OR R AUTOPILOT FROM FL 370 AND THE HALFWAY POINT OF THE FLIGHT UNTIL LANDING. HAND FLEW THE REMAINDER OF THE FLIGHT AT 280. RVSM RESTRICTED(<P><SPAN>PERFORMED TEST 40 AND FOUND NO INFO CENTER C-CH DETENT R IN PER FIM 22 05 FT 847 REMOVED AND REPLACED CENTER FCC. PERFORMED TEST 40, OPS CHECK GOOD AND CENTER AND RIGHT FCC TEST OPS CHECK GOOD, REF AMM 22-11-01. A/C OK TO CONTINUE</SPAN></P>)