Federal officials will let Southwest Airlines keep flying planes that missed a required inspection of a backup rudder system.
The Federal Aviation Administration says the inspections have to be done in the next five days, however.
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Southwest grounded 128 planes — about one-fifth of its fleet — on Tuesday after discovering the missed inspections.
A Southwest spokeswoman says the airline canceled about 80 flights Tuesday and expects to cancel up to 19 more on Wednesday while some inspections are done.