What was found
ALL FIRE TONES AND LIGHTS ANNUNCIATED FOR 10 SEC THEN APU FIRE WITH TONE STAYED ON FOLLOWED BY SMOKE FROM APU PANEL, PULLED APU FIRE HANDEL & DISCHARGED BOTH BOTTLES. APU NOT RUNNING. DECLARED EMERGENCY INTO HKG. FIRE ALERT REMAINS. REMOVED APU FIRE CONTROL PANEL, FOUND SMOKE ODOR FROM PANEL PER MM 49-04-01 & ALSO UNLATCHED ALL SURROUNDING PANELS FOR VISUAL INSPECTION WITH ELECTRICAL POWER ON, NO SIGN OF BURNING FOUND. APU FIRE DET RESISTANCE CHECKED PER SSM 26-12-0, BOTH LOOPS WITHIN LIMITS. APU FIRE CONTROL PANEL FROM ANOTHER ACFT CHECKED OK, R&R APU FIRE CONTROL PANEL PER MM 49-04-01, AFTER REPLACEMENT APU FIRE HANDLE RED LIGHT STAY ON, R&R APU FDCU PER MM 26-12-04 PASSED & LIGHT CHECKED NORMAL. R&R BOTH NR 1 & 2 APU/ENG 2 BOTTLE CONTAINER PER MM 26-21-01-4 & TESTED OK PER MM 26-21-01-5. INSPECTED APU COMP ALL NORMAL. RAN APU & 3 ENG PER JRH. ALL IND NORMAL.