What was found
DURING TRANSIT CHECK, THE MSG IN EICAS & STATUS OF THE OPENING THE EMER SYS OF THE 2R, 3R, 4L & 4R DOORS SENSORS. PERFORMED FIM 52-11 TASK 801 PROCEDURE, DETECTING THE MSGS 52-10940, 52-10939, 52-10930, 52-10938 & 52-10936. THE EPAS PRESS BOTTLE PRESS STATUS CHECK WAS PERFORMED IAW DMC B787A -52-11-21-00A-720A-A, CONFIRMING THE FAILURE, DOORS SENSORS WERE DEFERRED IAW MEL 52-11-01 CAT B. APPROVED TO PERFORM A FERRY FLIGHT. THE ACFT WAS SENT TO THE HANGAR & EPAS PRESS BOTTLES WERE REPLACED IAW AMM DMC B787-A-52-11-22-00A-520A-A & DMC B787-A-52-11-22-00A-720A-A. THE EMER POWER ASSIST MODULES WERE REPLACED IAW AMM DMC B787-A-52-11-21-00A-720A-A & DMC B787-A-52-11-21-00A-520A-A, TESTED CORRECT.