What was found
INSPECTION TYPE:N/A** ATB** NO EMERG DECLARED** A/C LANDED WITHOUT INCIDENT**AFTER TAKEOFF GOT IMEADIATELY AN MAIN CARGO DOOR EICAS WAS INTERMITENTLY REHEADED TO KOAK. PERFORMED PSEU BITE PROCEDURE, SWITCH S890 SHOWS FAR. DEF'D MN CARGO DOOR INDICATION IAW MEL 52-71-1-2 C/W DMP VERIFIED MCD CLOSED LATCHED & LOCKED PLACARD INST'D.FOUND S890 MCD SENSOR OUT OF ADJUSTMENT, C/W ADJ PER AMM 52-71-09-822-037. C/W T ALERT 198767, COMPLETED INSP OF LOCKS & LATCHES, NO FAULTS FOUND, OPS CK SYS, PLACARD RMVD.