1.   FAA officials also faced questions about whether the agency was adequately staffed to certify foreign aircraft and whether it was keeping up with advancements in technology.

2.   On Tuesday Venezuelan carriers began to suspend most flights to the U.S. until their aircraft are certified.

3.   Those and other discussions may lead, in months or even years, to new standards that manufacturers must meet before the aviation agency certifies their aircraft.

4.   Venezuelan carriers have subsequently suspended most flights to the U.S. until their aircraft are certified.

5.   And Boeing still must certify the aircraft for use with General Electric and Rolls-Royce engines.

6.   The Federal Aviation Administration has suspended authority delegated to Boeing to certify aircraft, but the effect was unclear.