What was found
RETURNED, EMER DECLARED, LANDING UNEVENTFUL & ACFT WAS OVERWEIGHT. NLG WOULD NOT RETRACT AFTER TAKEOFF. FOUND NLG STRUT FLAT. INSPECTION OF NLG FOUND THE SHRADER VLV SEAL CUT. PERFORMED NLG STRUT REPACK IAW AMM 32-21-02. PERFORMED GEAR SWING. SYS CHECKED NORMAL.