Airport Operations

Runway safety area length Runway Set back ARRESTOR BED Side steps htdiw yawnuR Typical Plan View An EMASMAX bed is typically the full width of the runway and the arrestor bed is set-back from the end of the runway. Typical Profile View Debris deflector over concrete beam Arrestor bed Lead in ramp Side steps Base surface The front of an EMASMAX bed includes a lead-in ramp to transition the aircraft into the material. Typical Section View Arrestor bed Stepped sides provide arff access and passenger egress Base surface • Beyond the runway width, the sides of an EMASMAX bed are stepped to provide emergency vehicle access and passenger egress. • The length of the EMAS bed is dependent upon the space available in the existing RSA and the design aircraft for the EMAS. • As stated in FAA Advisory Circular 150/5220-22A, Engineered Materials Arresting Systems (EMAS) for Aircraft Overruns, the EMAS is designed to arrest aircraft exiting the runway at speeds between 40 and 70 knots. 70 knots is the preferred EMAS design runway exit speed but in limited spaces, the EMAS may have design runway exit speeds as low as 40 knots. Figure 14-56. Diagram of an EMASMAX system. Pilot Considerations to commencing the approach. Following the guidance below Although engaging an EMAS should not be a desired ensures that the aircraft engages the EMAS according to the outcome for the end of a flight, pilots need to know what design entry parameters. EMAS is, how to identify it on the airfield diagram and on the airfield, as well as knowing what to do should they During the takeoff or landing phase, if a pilot determines that find themselves approaching an installation in an overrun the aircraft will exit the runway end and enter the EMAS, the situation. [Figure 14-59 and Figure 14-60] Pilots also need following guidance should be adhered to: to know that an EMAS may not stop lightweight general 1. Continue deceleration - Regardless of aircraft speed aviation aircraft that are not heavy enough to sink into the upon exiting the runway, continue to follow Rejected/ crushable concrete. The time to discuss whether or not a Aborted Takeoff procedures, or if landing, Maximum runway has an EMAS at the end is during the pre-departure Braking procedures outlined in the Flight Manual. briefing prior to takeoff or during the approach briefing prior 14-37