TC reported rear cab 3507 seat was faulty. TC feedback unable to lock seating position height. ~~~~~ 3507 TC reported seat was faulty. Unable to lock seating TC feedback unable to lock seating position height.    CE: 3507 cab seat unable to lock the height, suspect locking device faulty  3507 Cab seat replaced. Tested operation - OK. Sarma/Sugu/Anand/Kamar 45055