As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF CREW REPORTED AIR/GROUND FAIL WARNING. REPLACED GEAR HANDLE PN 7455501 SN 0589. REPLACED LGEU PN 355022002 SN 5270. ALSO, CLEANED AND SERVICED ALL LG STRUTS PERFORMED FUNCTIONAL TEST OF EXTENSION AND RETRACTION IAW AMM 32-30-00. CHECKED ALL 5 WOW PROX SWITCHES AND GAP CHECK IAW 32-63-05. AIRCRAFT RETURNED TO SERVICE.