The head of the National Transportation Safety Board says the Federal Aviation Administration needs to up the urgency on the potential for jammed flight controls on some Boeing 737s.

The National Transportation Safety Board issued urgent safety recommendations to Boeing over a steering defect related to its 737 planes, adding its growing list of woes.

The NTSB criticized the FAA for a desultory response to the risk from faulty 737 rudders and Boeing for not fully informing airlines in advance about them.

The head of the NTSB blasted the FAA, saying the agency is not taking seriously enough the potential for jammed flight controls on some Boeing 737s.