§ 299.415 Doors. ( a ) Each powered, exterior side door in a vestibule that is partitioned from the passenger compartment of a trainset shall have a manual override device that is— ( 1 ) Capable of releasing the door to permit it to be opened without power.
( 2 ) Located such that— ( i ) Interior access is provided adjacent to each manual door release mechanism; and,
( ii ) Exterior access is provided on each side of each car.
( 3 ) Designed and maintained so that a person may access and operate the override device readily without requiring the use of a tool or other implement.
( 4 ) The railroad may protect a manual override device used to open a powered, exterior door with a cover or a screen.
( 5 ) When a manual override device is activated, door panel friction, including seals and hangers, shall allow the doors to be opened or closed manually with as low a force as practicable.
( 6 ) The emergency release mechanism shall require manual reset.
( b ) Each passenger car shall have a minimum of one exterior side door per side. Each such door shall provide a minimum clear opening with dimensions of 813 mm (32 inches) horizontally by 1,850 mm (72.8 inches) vertically.
( c ) Door exits shall be marked, and instructions provided for their use, as specified in § 299.423.
( d ) All doors intended for access by emergency responders shall be marked, and instructions provided for their use, as specified in § 299.423.
( e ) Vestibule doors and other interior doors intended for passage through a passenger car. ( 1 ) *General.* Except for a door providing access to a control compartment each powered vestibule door and any other powered interior door intended for passage through a passenger car shall have a manual override device that conforms with the requirements of paragraphs (e)(2) and (3) of this section.
( 2 ) *Manual override devices.* Each manual override device shall be: ( i ) Capable of releasing the door to permit it to be opened without power;
( ii ) Located adjacent to the door it controls; and
( iii ) Designed and maintained so that a person may readily access and operate the override device from each side of the door without the use of a tool or other implement.
( 3 ) *Marking and instructions.* Each manual override device and each retention mechanism shall be marked, and instructions provided for their use, as specified in § 299.423.
( f ) The status of each powered, exterior side door in a passenger car shall be displayed to the driver in the operating cab. Door interlock sensors shall be provided to detect trainset motion and shall be nominally set to operate at 5 km/h.
( g ) All powered exterior side passenger doors shall— ( 1 ) Be equipped with the service-proven door safety system utilized by the N700 or an alternate door safety system designed subject to a Failure Modes, Effects, Criticality Analysis (FMECA);
( 2 ) Be designed with an obstruction detection system capable of detecting a rigid flat bar, 6.4 mm (1 ⁄ 4 inches) wide and 76 mm (3 inches) high and a rigid rod, 9.5 mm (3 ⁄ 8 inches) in diameter;
( 3 ) Incorporate an obstruction detection system sufficient to detect large obstructions;
( 4 ) Be designed so that activation of a door by-pass feature does not affect the operation of the obstruction detection system on all the other doors on the trainset;
( 5 ) Have the door control station located in a secured area that is only accessible to crewmembers or maintenance personnel;
( 6 ) Be designed such that the door open or closed circuit is not affected by the throttle position; and
( 7 ) Use discrete, dedicated trainlines for door-open and door-close commands, door-closed summary circuit, and no motion, if trainlined.
( h ) All powered exterior side door systems in a trainset shall— ( 1 ) Be designed with a door summary circuit. The door summary circuit shall be connected or interlocked to prohibit the trainset from developing tractive power if an exterior side door in a passenger car, other than a door under the direct physical control of a crewmember for his or her exclusive use, is not closed;
( 2 ) Be connected to side door status indicators located on the exterior of each unit of the trainset;
( 3 ) Be connected to a door summary status indicator that is readily viewable to the driver from his or her normal position in the operating cab;
( 4 ) If equipped with a trainset-wide door by-pass device, be designed so that the trainset-wide door by-pass functions only when activated from the operating cab of the trainset;
( 5 ) Be equipped with a lock (cut-out/lock-out) mechanism installed at each door panel to secure a door in the closed and locked position. When the lock mechanism is utilized to secure the door in the closed position, a door-closed indication shall be provided to the door summary circuit; and
( 6 ) Be designed such that a crew key or other secure device be required to lock-out an exterior side door to prevent unauthorized use.
( i ) ( 1 ) *Visual inspections and functional tests.* The inspection and functional tests required for the door safety system, including the trainset-wide door by-pass verification, shall be conducted in accordance with the railroad's trainset inspection, testing, and maintenance program in accordance with § 299.445, and operating rules under subpart E.
( 2 ) *Face-to-face relief.* Crewmembers taking control of a trainset do not need to perform a visual inspection or a functional test of the door by-pass devices in cases of face-to-face relief of another trainset crew and notification by that crew as to the functioning of the door by-pass devices.
( j ) The railroad shall maintain a record of each door by-pass activation and each unintended opening of a powered exterior side door, including any repair(s) made, in the defect tracking system as required by § 299.445(h).