Here’s why the Air Force is investigating the KC-10

A U.S Air Force KC-10 Extender with the 76th Air Refueling Squadron, 514th Air Mobility Wing, moves in to be refueled by a KC-10 crewed by Reserve Citizen Airmen with the 78th Air Refueling Squadron, 514th Air Mobility Wing, over the Atlantic Ocean, Feb. 14, 2018. The 514th is an Air Force Reserve Command unit located at Joint Base McGuire-Dix-Lakehurst, N.J. (U.S. Air Force photo by Master Sgt. Mark C. Olsen)

A KC-10 refueling tanker flight crew aborted takeoff at Joint Base McGuire-Dix-Lakehurst in New Jersey last month, and the Air Force is investigating why its slide-rafts failed to deploy.

There was smoke in the flight deck, which caused the crew to evacuate from the tanker on May 20, but two slide-rafts failed to inflate properly, Col. Chris Karns, Air Mobility Command spokesman, told Air Force Times in an email Monday.

This caused the crew to evacuate via a fire department truck ladder, Karns said.

The Air Force tested slide-raft deployments on other KC-10s to see if the failure was an isolated incident or something that required additional assessment. Four failed deployments occurred — two during the May 20 incident, one at Travis Air Force Base in California and a fourth on a McGuire KC-10 in depot, Karns said.

A stand-down isn’t required, however, because crews are trained on secondary egress techniques involving ropes. KC-10s have three escape ropes for such emergencies.

Air Mobility Command is working with engineers to assess the situation and find a solution, Karns said.

AMC is using preliminary risk assessment data to standardize operational procedures until a fix is delivered. This won’t disrupt the KC-10′s main mission of aerial refueling, Karns said.

However, Space-A travel has been reduced for flights on the KC-10 at Joint Base McGuire-Dix-Lakehurst and Travis Air Force Base.