As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FT # 159, BOS-PHL. RETURNED TO FIELD. EMERGENCY DECLARED. ON CLIMB-OUT AFTER LANDING GEAR RETRACTION LG WOW SYS FAIL. RAN QRH. MESSAGE CLEARED AFTER LANDING GEAR EXTENDED. STEERING WORKED NORMALY ON TAXI IN; SERVICED NOSE STRUT PER AMM 12-12-09.