Christine,
Didn't say who your husband is, but contact our Seawolf Veterans Service Director, Bill Pressey. He was also a Seawolf Helicopter Pilot and will tell you he IS eligible. He will give you all the info you need. His number is (541) 915-5517.
There is also a page here on our website with info at:
http://www.seawolf.org/va/va.aspIncluding a letter regarding back pain in the Naval Rotary Wing Community:
http://seawolf.org/va/backpain.pdfDan