At 21:15:19, Klotz contacted the tower controllers and informed that Flight 52 was "established two two left." One minute later, the captain asked if he should lower the landing gear, but the first officer replied, "No I think it's too early now." At 21:17:30, JFK tower asked Flight 52 to increase their airspeed by ten knots to . At 21:18:11, the flight was three miles from the outer marker. Twenty-one seconds later, the first officer remarked "glideslope alive." At 21:19:09, the captain requested the landing gear be deployed. Almost a minute later, the JFK tower cleared the flight to land on runway 22L. The captain asked the first officer to confirm that the flight was cleared to land. At 21:20:28, the first officer began informing the captain that the aircraft was below the glideslope. At 21:22:07, Flight 52 descended to . The aircraft began descending beyond the angle of the glideslope, then began climbing above it, followed by a steeper descent. At 21:22:57, the first officer commented, "This is the wind shear." The first officer warned the captain about the sink rate and noted an altitude of at 21:23:10. As he warned the captain, the ground proximity warning system (GPWS) began eleven "whoop whoop pull up" audible warnings. At 21:23:13, the captain called for lights, followed by questions as to where the runway was a few seconds later. The GPWS began four "glideslope" audible warnings a few seconds later, alerting the flight crew that the aircraft was below the glideslope. In response to the captain's inquiries, the first officer replied that he did not see the runway. At 21:23:23, the flight began climbing again, having come within of crashing two miles short of the runway. The landing gear was raised and the first officer announced that the flight was executing a missed approach.