As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
100233376 - ">SMOKE CREW REST" ENGINE-INDICATING AND CREW-ALERTING SYSTEM ON TAKEOFF. PERFORMED ADJUSTMENT/TEST CREW REST SMOKE DETECTION SYSTEM. OPERATIONAL CHECK GOOD. NO FAULTS OR MESSAGES NOTED. IN REFERENCE WITH B747-400 KA AMM 26-14-50.