Dash 8-100
Air Traffic Control Fully Certified
Other / Unknown
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Procedure
Approaches to parallel runways were in use; Runway's 33L/33R. Runway 33R is a short runway; only 2;500 FT long; used primarily for (small) aircraft only. In this situation a DH8 (large) was landing on 33R and the H25A was landing on 33L (small). The DH8 had to slow to his final approach speed early in the approach in order to successfully land on the small runway and compression was excessive. Plus; it was unusual to have a large aircraft landing on Runway 33R and wake turbulence was overlooked. The parallel runways are considered same runway for wake turbulence and the H25A was less than 4 miles when the DH8 landed on 33R. Do not allow large aircraft to land on 33R. They have to go so slow to successfully land that it does not make the operation any more efficient than if they had gone to 33L.
A90 Controller described a probable loss of wake separation when a 'large' aircraft was permitted to land on Runway 33R; the reporter suggested that 'large' aircraft be prohibited from using Runway 33R.