As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3507 AFTER BLOCK IN AND DOORS DISARMED ALL DOORS HAD FLASHING CABIN PRESS LIGHTS. CORRECTIVE ACTION: PERFORMED ASPSU RESIDUAL PRESS IND LT TEST, PASS PER A350 AMM 52-71-29 AND VISUAL COND CHK, DIFF PRESS SW AT AVIO BAY NORMAL. ITEM OK FOR SVC.