DT513: UndershootDT513 reported Undershoot. LDC shows brake blending. Time, Station of Fault & Distance to stopping point: 1) 1842hrs, 2.703m, ALJ1.2) 1855hrs, 2.111m, TNM1. 3) 1902hrs, 2.843m, TAM1. ~~~~~ 3513 reported Undershoot. LDC shows brake blending. Time, Station of Fault & Distance to stopping point: 1) 1842hrs, 2.703m, ALJ1. 2) 1855hrs, 2.111m, TNM1. 3) 1902hrs, 2.843m, TAM1.  513/514 ER D/L & no brake fault found on all cars. No unusual brake pressure (BCP) observed during time of report. Checked/found no air leak on ACU. Dump v/v operation check - OK. Wheel diameter check/found #1513 & #2513 with wrong inputs. Amended #1513 (from 793mm to 850mm) & #2513 (from 789mm to 850mm).  Au TK 44648