What was found
MODE CONTROL PANEL "APP" SWITCH LIGHT DID NOT ILLUMINATE GREEN WHEN SELECTED. BOTH CAPTAIN'S AND F.O.'S FLIGHT DIRECTORS SHOWED NORMAL LOC AND GS GUIDANCE, AND BOTH FMA'S SHOWED "LOC" AND "GS" ANNUNCIATIONS. GROUNDED - YES. RESET SYSTEM, RAN LRU REPLACEMENT TEST FOR MCP - (BITE TEST GROUP #32). DFCS MODE CONTROL - ADJUSTMENET TEST AMM 22-11-34/501 AND LAND VERIFY TEST - BITE TEST GROUP #49 - DIGITAL FLIGHT CONTROL SYSTEM - AMM 22-1-00/201, OPS CHECK GOOD. AIRCRAFT IS AUTOLAND AND HGS CAT III QUALIFIED. ETOPS SYSTEM WORKED ON, GROUND FUNCTIONAL CHECKS GOOD IAW MAINTENANCE MANUAL REFERENCES STATED ABOVE.