The scope of this task order involves expanding the previously obtained aeroacoustic database for the 30P30N high-lift configuration to include: 1. Assessment of an improved implementation of a solid slat gap filler that overcomes the adverse side effect of the implementation used during the previous measurements (Ref. 5), by fully closing or sealing the gap under installed and wind-on conditions. 2. Evaluate the effectiveness of a porous gap filler. 3. Acquire time accurate measurements of unsteady flow via Particle Image Velocimetry (PIV) applied to the slat cove region, and, if possible, one or more out of the main wing cove, flap suction surface, and top of the main wing leading edge (where the gap filler will attach to the main wing). Tasks 1 and 2 above will include at a minimum, steady and unsteady surface pressure measurements at selected locations over the model surface, along with the PIV data, and phased microphone array measurements for the 30P30N model mounted in a Kevlar wall configuration. We will deliver the processed data as well as selected parts of the raw data along with a test report that documents the measurements and the associated errors/uncertainties.