Delta will announce sometime today whether or not it will ground more of its planes to perform additional inspections, reports CNN. Yesterday, while American Airlines was grounding 200 of its planes for safety inspections, Delta also canceled an unnamed number of flights. Both airlines' renewed focus on safety inspections comes after reports that Southwest Airlines was caught flying planes that hadn't met inspection guidelines.

Delta (DAL, Fortune 500) is inspecting the wiring of 117 MD-88 and 16 MD-90 aircraft. The airline says the checks are voluntary and are expected to be completed by week's end. American Airlines, meanwhile, is examining wiring secured to the MD-80 aircraft.