As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 5643 ON TAKEOFF "L AFT ENT DOOR" EICAS MSG CAME ON FOR A FEW SECONDS AND THEN EXTINGUISHED SEVERAL TIMES. CORRECTIVE ACTION: PSEU BITE SHOWS NO FAULTS AND TARGET POSITION INDICATES NORMAL. CLEANED AND INSPECTED PROX SWITCH AT DOOR 4L. ADJUSTED PROX SWITCH PLUNGER OUT SLIGHTLY TO ELIMINATE NUISANCE INDICATION. (5365382)