One of the first brand new chinooks had a thermometer dropped inside it ( we used to use them for taking the OAT at altitude in setting up the engines….. ) it was down for a week or so for it all to be removed, thankfully the corrosion proofing stopped any problems with contact, but we had the whole floor out after decontaminating that.

We also suffered corrosion on some of the new Chinooks as they were delivered during the winter months……. turned out the crews ferrying them to the docks from the factory would take a car in the back, these in winter had frozen snow with road salt in it on the undersides, this would melt in flight and and then sit in the cabin on the voyage to the UK quietly festering, once the floor came up on the first big inspection the problem was found.