The Latest on a National Transportation Safety Board hearing and documents released on an investigation into a fatal engine failure on a Southwest flight (all times local):

3:50 p.m.

An investigative hearing into a broken fan blade that led to a fatal engine failure on a Southwest flight has concluded.

The majority of the National Transportation Safety Board hearing Wednesday was highly technical with testimony from representatives of the company that makes the blade and other industry officials.

PHILADELPHIA (AP) — The Latest on a plane making an emergency landing in Philadelphia (all times local):

10:05 p.m.

Southwest Airlines says it's speeding up inspections of engines like the one that failed and sent debris smashing into a plane window, leading to the death of a passenger.

Southwest said Tuesday it expects to finish inspections of the CFM56 engines over the next 30 days. It says it's making the move out of caution.