What was found
WOW OUTBOARD CAUTION MESSAGE ON TAKEOFF, PERFORMED QRH, MESSAGE PERSISTED. FLIGHT 5552 - FILED CLOSED INTERROGATED PSEU AND HAVE FOLLOWING CODES SET FOR CURRENT LEG: S36, S38, S25, S40, S26, S41, S27, S46, DI13, S47, DI16, DI17, S48, S04, S12 (ALL INVALID FAR). APPEARS AIRCRAFT THINKS IT'S STILL WEIGHT ON WHEELS. NO PSEU CODES FOR ANY GEAR SENSORS AND PILOT REPORTS COULD NOT MOVE LANDING GEAR SELECTOR HANDLE TO RETRACT POSITION. REMAINED GEAR DOWN FOR LANDING. INSPECTED ALL GEAR AND FOUND R/H MLG O/B WOW SENSOR HAD TARGET STILL INSTALLED BUT NONE IN I/B WOW SENSOR, INSPECTED L/H MLG AND FOUND O/B AND I/B WOW SENSORS HAD TARGETS INSTALLED. REMOVED THE TARGETS FROM BOTH MLG. INSPECTED NLG AND FOUND NO TARGETS INSTALLED. NO CAUTION MSG'S POSTED. PSEU SELF TEST OPS CHECKS GOOD. SEE AML 426685 FOR LANDING GEAR OPS CHECKS.