WASHINGTON, April 2 (Reuters) - The Federal Aviation

Administration said on Wednesday it may slow flight arrivals at

Reagan Washington National Airport after a January 29 collision

between a helicopter and an American Airlines ( AAL ) regional

jet that killed 67 people.

The FAA also said it is increasing operational supervisor

staffing from six to eight and was reviewing air traffic control

staffing figures at Reagan.

The FAA is also reviewing the airport's "arrival rate of

aircraft per hour, which is disproportionately concentrated

within the last 30 minutes of each hour."