TM 9-2320-364-20-22-17602. PARKING BRAKES ON AXLE NO. 3 DO NOT RELEASE (CONT).Parking brakes on Axles No. 4and No. 5 operate correctly.One set of brakes on Axle No.3 fail to release.Air lines and fittings OK.Relay spring valve No. 1 not leaking.Relay spring valve No. 1 OK.Air chambers OK.Brakes OK.KNOWN INFOPOSSIBLE PROBLEMSTEST OPTIONSREASON FOR QUESTIONVerify repair.YESNOFault not corrected.Notify DSMaintenance.7.Do parking brakes on AxleNo. 3 release?If parking brakes on Axle No. 3release, fault has beencorrected.Fault corrected.