What was found
AFTER PUSHBACK WITH ENG1 RUNNING AND PARKING BRAKE ON. ALL BRAKE PRESS LOST AND ACCUM LOST TROUBLESHOT REF TSM 32-44-00-810-808-A TO STEP 4A (3)(A). NEED TO R&R ALTN BRK DISTR DUAL VALVE REF AMM 32-43-14-000-001-A REMOVED VALVE REF AMM 32-43-14-000-001-A COMPLETED THRU STEP TO R&R ALTN BRK DISTR DUAL VALVE REF AMM 32-43-14-000-001-A 4 A (9)(C). FINISHED REMOVAL AND INSTALLED VALVE PER AMM 32-43-14-400-001-AT COMPLETED INSTALLATION OF THE DUAL VALVE ALT BRAKE UP THROUGH ST HRU STEP4(E)1 EP 4 E (2).