As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARGO SMOKE TEST WON'T START. // CARGO TEST SWITCH CHECK OK. SWAPPED VIA #1 AND #2 CONDITION SAME, REINSTALLED VIA'S IN ORIGINAL POSITIONS. VIA #1 AND #2 R.T.S. PASS. RED TRIANGLE SHOWS FOR ACFT DETECTOR. REMOVED AND REPLACED AFT CARGO CHANNEL FORE SMOKE DETECTOR SENSOR PER AMM 26-13-01. PERFORMED OPERATIONAL TESTS FOR FIRE DETECTION. OPS CHECK GOOD. OK FOR SERVICE.