Section 29(2) in The Delhi Metro Airport Express Line, General Rules, 2010
(2)(i)If traction power is lost on any car, the train need not be withdrawn from service, if power is lost on more than one car and the reduction in speed causes delay to following trains, the passengers shall be detrained at the station and the train worked empty, otherwise, the train may remain in passenger service until it can be replaced by a serviceable train;(ii)in the event of a mechanical defect in the traction motor or drive which causes the wheels to lock, the train shall be stopped immediately and shall not be moved until clearance has been given by a Rolling Sock Supervisor;(iii)if a Train operator finds that the train cannot be driven or braked from the leading end cab, passengers shall be detrained as per the provisions referred in clauses (iv) and (v) of this sub-rule;(iv)such an occurrence may usually happen at a station and a terminal in which case the passengers shall be discharged at the station itself and to dispatch the train to the depot, the station controller shall board the train and act as look out in the leading cab while the train operator drives from the rear cab in Cut out mode Information on signals and cleared routes shall be passed by cab to cab telephone and train speed restricted to a maximum of ten kilometer per hour;(v)In the unlikely event that the defect causes a train to stop between stations, the traffic controller shall arrange another train operator or if necessary a Station Controller competent to drive the train to reach the failed train and drive the train from rear cab in Cut out mode with leading cab train operator acting as look out and the information on signals and cleared routes shall be passed by cab to cab telephone or radio and train speed restricted to a maximum of ten kilometer per hour.
