What was found
(CAN) THE FLIGHT CREW RECEIVED AN EICAS FLAP FAILURE MESSAGE AT F380, PRIOR TO DESCENT WITH FLAPS INDICATING AMBER AND SHOWING ZERO. AS A PRECAUTION, THE FLIGHT CREW DECLARED AN EMERGENCY WITH ATC FOR PRIORITY HANDLING. THE LANDING WAS OTHERWISE ROUTINE AND THERE WAS NIL ADVERSE PASSENGER REACTION. LT NR 3 FLAP SKEW SENSOR REPLACED REF AMM 27-53-06. NR 1 SF ACE REPLACED REF AMM 27-53-02. NR 4 FLAP SKEW SENSOR REPLACED, NEW SENSOR FAILED ON INSTALL, SN 3519, REMOVED. ORIGINAL SKEW SENSOR RE-INSTALLED IN POSITION 4 SN ON 1519 REF AMM 27-53-06. NR 1 SF ACE PN: 1700064F, SN: 0102, POS: RT.