What was found
FLAP FAIL CAS CAUTION MESSAGE IN CRUISE FLIGHT. FLAPS FAILED AT ZERO. QRH COMPLIED WITH. BRAKE TEMPS INDICATE 4,4,5,6, COMPLIED WITH RESET PROCEDURE IAW SUPP 98-018B, STEPS 1.3 AND 1.4. FLAP SYSTEM RESET, OK. REMOVED AND REPLACED LT BPSU, OPS CHECK GOOD IAW AMM 27-51-00. (K)