What was found
MAIN CABN DOOR EICAS LIGHT ILLUMINATION AT FL380 WITH CARGO DOOR OVERHEAD LIGHT ON AS WELL, DIFFERENTIAL PRESS STEADY 8.1PSI, CABIN ALT APPROX 6500. LIGHT WENT OUT ON DESCENT INTO DIVERT FIELD FL190. AMM 52-71-09-2 WORKED IN CONJUNCTION WITH TSI 52-70/2271. S892 FAULTED IN PSEU BITE HISTORY. REMOVED AND REPLACED S892 SENSOR REF. AMM 52-71-09-2. CONFIRMED GAP OK AND INDUCTANCE TO BE CORRECT AT 5.8MH. DOOR CLOSES, LATCHES, AND LOCKS CORRECTLY IAW AMM 52-32 00-2.