What was found
PDIS 664 22-10 4554 10MAR22 IND FACT U AFTER TAKEOFF, NOTICED CAPTAINS PFD SHOWED RED ZIPPER LIMIT AT 270 KTS AS IF THE GEAR WAS DOWN. BOTH GEAR INDICATOR SYSTEMS SHOWED ALL GEAR UP AND DOORS CLOSED. AT 10,000 FEET WE SWITCHED CAPT SIDE TO ADC 2 AND FD 2 AND AIRCRAFT ON AUTOPILOT WOULD NOT ACCELERATE PAST 270 KTS. TURNED OFF AUTOTHROTTLES AND ACCELERATED TO 290 KTS, NO WARNING CHIMES PRESENT. SWITCHING LANDING GEAR POS DET FROM #1 TO #2 HAD NO EFFECT ON THE SPEED CONTROL OR CAPT PFD. WITH AUTOTHROTTLES ON, AIRCRAFT WOULD DECELERATE TO BELOW 270 KTS. GOC DIRECTED DIVERT TO KIND. REF ITEM 2210/4562 FOR INSTALLING NEW 128GB FOR POSSIBLE INTERMITTENT GEAR EXTENSION SIGNAL LIMITING AC SPEEDS REF MM 34-13-00-0, ADC1 AND FAC1 PROVIDE AC SPEED DATA AND ADVISORY FOR CAPT PFD. REF ITEM 2210/4560, ITEM 2210/4561 FOR INSTALLING NEW ADC1 AND FAC1. REF MM 22-40-00-5, MM 34-10-00-02, PERFORMED AFS/LAND TEST. NO FAULTS NOTED. AC HIGHEST LEVEL LLM. AC REMAINS RVSM CAPABLE.