As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH INTO DTW THE CREW EXPERIENCED AN ABNORMAL GEAR INDICATION AND HYD CAUTION LIGHT. FLAPS FAILED TO EXTEND BEYOND 15 DEG THE CREW DECLARED AN EMERGENCY AND DID AN EMERGENCY EXTENSION OF THE GEAR. THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAIN ACC PSI LOW ON APPROACH. HYD CAUTION PERFORMED QRH. PULLED EMERGENCY LDG HANDLE. NORMAL GEAR INDICATION AND NORMAL FLAPS UPON LANDING. CND HYD CAUTION LT. REMOVED AND REPLACED LEFT GEAR SEPARATION BOLTS IAW JOB CARD 323109.