As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - FLT 1608 - ENR OUTE SFO-ORD, AFTER TAKEOFF LANDING GEAR WOULD NOT RETRACT. RETURNED SFO AND LANDED WITHOUT INCIDENT. REPLACED MANUAL SYSTEM ACCESS DOOR SWITCH AND ACTUATOR. ACCOMPLISHED GEAR SWING. GROUND CHECKED NORMAL OPERATION. (M)