3550: To replace faulty TIMS HLD card. ( ~~~~~ 3550: To replace faulty TIMS HLD card. (Cannibalise from 513)  3550 HLD PCB replaced. Security/function check - OK. 3550 HLD PCB S/N : OLD : CU12030PZ NEW : CZ23393PB  Sarma/Anand 44057