What was found
FLIGHT CREW REPORTED DURING CRUISE CREW GOT AFT CARGO FIRE WARNING LIGHT, PERFORMED QRH PROCEDURES LIGHT REMAINED ON. PERFORMED CARGO SMOKE DETECTION OPS TEST IAW AMM 26-16-00 -710-801. OPS AND COCKPIT INDICATION NORMAL. PERFORMED TEST WITH AFT CARGO CEU. ALL LAMPS ILLUMINATE & COCKPIT IND NORMAL. PERFORMED WIRING CHECK IAW WDM 26-16-22, PAGE 3, SHEET 1. AFT CARGO CEU TO EACH SMOKE DETECTOR (1A/ 2A/ 3A/ 1B/ 2B/ 3B) COCKPIT P8 -75 TO AFT CARGO CEU.CONTINUTY CHECK & INSULATION CHECK RUSE ULT OK (NO FLUX WITH WIRE SHAKE) RESULT ATTACH WDM SHEET REMOVED AFT CEU IAW AMM 26-16-02-000-801. CARGO ELECTRPNIC UNIT INSTALLED.INST TEST PASSED. REF AMM 26-16-02-400-801, R &R CEU & WIRING CK COMPLETED.