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FACILITY REQUIREMENTS 3.5.4.2Taxiway Holding Bay and Bypass Configurations EUG accommodates a widely varying fleet mix of aircraft, from large jet airliners to small single engine training aircraft. The current holding bays and bypass taxiway in place today at the Airport are designed to accommodate this fleet mix. This subsection details the findings of the analysis conducted on these pavement features. Runway 16L-34R is primarily used by general aviation aircraft, and includes taxiway holding bay’s on both runway ends. The current holding bays are designed to the former standard outlined in the now outdated AC 150/5300-13 Airport Design, shown in the left graphic of Figure 3-7. The new AC has revised the configuration of holding bays to a design that ensures large aircraft will maintain wingtip separation. The new configuration, shown in the right graphic of Figure 3-7, is primarily intended for airports accommodating primarily large jet aircraft, and is not an efficient design for airports serving small general aviation aircraft. Smaller, more maneuverable aircraft, have better visibility out of the cockpit than large airliners, and pilots of small aircraft are typically accustomed to maneuvering in confined spaces that lack separation standards. Thus, pilots of small aircraft don’t require separated areas to maintain wingtip separation. However, they do require an area off of the taxiway where they can safely run-up their aircraft engines to conduct safety checks prior to takeoff. The existing holding bays for Runway 16L-34R are preferred for this purpose as they offer greater flexibility with less overall cost, maintenance, and complexity than the new design. For this reason, no change to those pavement features are recommended within the planning period. FIGURE 3-7 HOLDING BAY CONFIGURATION Former FAA Guidance (Recommended for EUG) New FAA Guidance Source: FAA Advisory Circular 150/5300-13A Change 1, Airport Design Runway 16R-34L, the Airport’s primary commercial service runway, includes a holding bay and a bypass taxiway (Taxiway A2) on the Runway 16R end. On Runway 34L, Taxiway A8 acts as a non-standard bypass taxiway, but will have been removed by the time this document is published. The bypass taxiway for Runway 16R is used by small piston aircraft for engine run-ups in the same manner as described for Runway 16L-34R. It is also used by commercial aircraft for deicing operations. Deicing operations that use Type II deice fluid have very short holdover times, and as such, must be conducted immediately adjacent to the runway threshold. EUGENE AIRPORT MASTER PLAN 3-24