sentences:  An example of this that the captain failed to lower the landing gear immediately after lowering the flaps to 25 degrees, because he "wanted to avoid placing a simultaneous demand on the hydraulic system while the flaps were in transit".Similarly, the first officer never made the required 1,000-ft callout, because he never got to 1,000 ft mentally, because of his "inner time clock" which was based on a normal descent rate.In addition, each person chose not to ask for or offer additional assistance or warnings, including recommended announcements and acknowledgments.