What was found
IN FLIGHT AT FL400 WE HAD AN FCE 1 FAILURE. REMOVED FCE PN: 462900-1017 SN: 0550 FROM FCE 1 POSITION AND REPLACED WITH FCE ORIGINALLY IN THE FCE 2 POSITION MENTIONED ABOVE DUE TO FCE 1 FAILURE IN FLIGHT AND UNABLE TO DUPLICATE ON THE GROUND FOR CUSTOMER CONVENIENCE. RIGGING AND OPS CHECK GOOD. WORK DONE IAW EMB 505 MM 27-50-00 2 REMOVED FCE PN: 462900-1017 SN: 0402 FROM FCE 2 POSITION AND REPLACED WITH FCE ORIGINALLY IN THE FCE 1 POSITION MENTIONED ABOVE DUE TO FCE 1 FAILURE IN FLIGHT AND UNABLE TO DUPLICATE ON THE GROUND FOR CUSTOMER CONVENIENCE. RIGGING AND OPS CHECK GOOD. WORK DONE IAW EMB 505 MM 27-50-00