As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CA SEAT BELT BUCKLE WILL NOT RELEASE. REMOVED ROTARY PART OF SEAT BELT FROM CAPT SEAT AND SWITCHED ROTARY PART OF SEAT BELT WITH THE SECOND OBSV ROTARY SEAT BELT PART & DEFERRED SECOND OBSV SEAT PN 1101550-03. TRANSFER TO DMI 257490 PER MEL 25-11-02-02. R & R 2ND OBSERVERS SEAT BELT BUCKLE IAW CMM 25-11-04. OPS CHK GOOD. THIS CLEARS DMI 257490, PLACARDS REMOVED.