What was found
LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF INSP A/C FOUND ALTERNATE GEAR EXTENSION COVER HAS DEBRI OBSTRUCTING COVER FROM CLOSING. REMOVED SOME BUT NEEDS FURTHER CLEANING. REMOVED REMAINING DEBRIS FROM MANUAL EXTENSION COVER HINGE AND LATCHES, VERIFIED DOOR CLOSES ND ENGAGES DOOR POSITION SWITCH. REQUIRES GEAR SWING TO CONFIRM FIX PERFORMED LANDING GEAR EXTENSION AMD RETRACTION TEST REF AMM 32-32-00-710-801. OPS CK GOOD.