As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOSS OF BRAKING ON TAXI OUT. CORRECTIVE ACTION: R&R BRAKE VALVE WITH SERVICEABLE BRAKE VALVE PN ON HP1408100-4 SN ON 1695A PN OFF HP1408100-4 SN OFF 1127A. ALSO PERFORMED BLEEDING OF THE BRAKES/HYD SYSTEM IAW SAAB AMM 32-42-00-02 BRAKE VALVE REF AMM 32-42-10-04-1 R&R #2 AND #3 WHEEL SPEED TRANSDUCER #2 PN ON 140-041 #2 SN ON 1256 #3PN OFF 140-041 SN OFF 2187 IAQW SAAB 340 AMM 32-43-05-04