Video: Feds Probe Jetliner Hole Incident

The baggage handler was employed by Menzies Aviation, a company that Alaska Airlines hired to provide ramp services at Sea-Tac Airport after it laid off nearly 500 workers in May to cut costs. The worker has been suspended.

Alaska Airlines spokeswoman Caroline Boren said Menzies Aviation is retraining workers to make sure they report any damage to planes.

Menzies issued a statement Wednesday, saying the company is "deeply concerned about the unfortunate incident that occurred on Monday."

"We are conducting our own internal investigation and fully cooperating with the NTSB in its investigation," the statement said.

In Monday's incident, the baggage handler didn't report scraping a plane with loading equipment, apparently leading to the hole forming in the fuselage after takeoff.

When the plane reached an altitude of 26,000 about 20 minutes into the flight, passengers heard a loud noise and felt their ears pop as the cabin lost air pressure. Oxygen masks dropped from the ceiling. None of the 140 passengers or five crew members on Flight 536 was hurt.