As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSING THROUGH 17000FT THE FWD ACCESS DOOR EICAS APPEARED ALONG WITH THE ACCESS DOOR OVERHEAD LIGHT. THE AIRCRAFT BEGAN TO DEPRESSURIZATION SIMULTANEOUSLY. WE RAN THE QRH PROCEDURE AND LANDED UNEVENTFULLY. AMM: 52-48-01-4. ADJUSTED FWD ACCESS DOOR LATCH PIN IAW AMM 52-48-01-4, FWD ACCESS DOOR OPS CHECK GOOD. SEE WRI 21-30/2788 FOR FOR FURTHER INFO.