As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: LEFT BRAKE PEDAL VERY SOFT TO ALMOST NO FEEL. MAINTENANCE REPLACED VALVE BRAKE DUAL DISTRIBUTION PER AMM 32-43-14. (AALA202302138912), REPLACED BRAKE DUAL SHUTTLE VALVE (AALA202302139859), REPLACED YELLOW BRAKE RETURN CHECK VALVE 3024GM PER AMM 29-00-00-910-003A (AALA202302138010) AND REPLACED LEFT BRAKE MASTER CYLINDER PER AMM 32-43-12-400-001A. (AALA202302135657). A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED.