Sir, 3 saal mein maatra doosra fault hai, wo bhi brake jam ka. Pata kariye ki aur trains mein ye kitni dafa hota hai.. Phir Train 18 set se compare kariye. WAP 7 100 se upar baar fail ho chuke hain, so, they are technically deficient? Its a machine. Wear & Tear is inevitable with any machine. What matters is the frequency of that. & Train 18 has proved itself. 3 yrs & just 2 faults.
& CRO is not a technical fault. It will happen till our tracks are fenced. Doesn't matter whether train is running at 110, or 130 or 160.