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(b) Under an extremely unlikely combination of unusual circumstances, the building could theoretically represent an obstacle to flight. The plane would have to maintain a significantly less than normal rate of climb (about 1/3 of normal); a very strong crosswind would be required (about 24 knots); and the pilot would have to be distracted or inattentive. Crosswinds that strong would only exist outside the normal operating parameters for the least powerful aircraft, and have the potential for occurring, on average, less than 8 hours per year. Even if these conditions existed, the pilot should be able to see the building and avoid it. Pilot inattention and distraction is not a normal situation, particularly on landing or takeoff. Therefore, this remote possibility is not a significant impact. (c) The pilot of a twin engine aircraft attempting to return to the airport with one engine out would probably use the escape opportunities provided by the extended clear zone and 50-foot height limitation corridors already in existence and designed for just such a purpose. The use of the escape corridor would not require a pilot to make a tight mm between buildings and the airport. 3.10.11 Potential Effect: The aircraft traffic mix at San Carlos Airport often results in high speed, high performance aimrat~ being mixed with lower performance aircraft. As a result, air traffic controllers must sometimes turn the slower aircraft early to allow the higher performance aircraft to depart. On occasion, high performance aircraft may overtake low performance aircraft on final approach to Runway 30; this requires the high performance aircraft to "go around" and overfly the landing aircraft. In doing so, the aircraft on go-around may mm early to reenter the downwind leg of the traffic pattern. This would place low-flying aircraft in the vicinity of the Project. Any other air traffic control conflict that results in a go- around or an early right turn could also be affected by the height oftbe buildings. Findings: The GID hereby makes finding (I). Facts in Support of Findings: (a) For Runway 30 departures, the slower aircraft would be turned prior to reaching the diamond-shaped waterway; in this case, the aircraft required to mm early could directly overfly the Project site. Even the lowest performing aircraft in the San Carlos fleet has a normal rate of climb that would result in the aircraft overflying the 10-story building at an altitude of approximately 600 feet MSL, or about 450 feet above the top of the building. (b) When a high-performance aircraft is required to "go around," the aircraft on go-around may mm early to re-enter the pattern. This could place it in the vicinity of the Project. The pilot either would follow air traffic control -28- GIDEIRFD.DOC 7/23/96 5:44 PM