The FAA directive covers this: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/8a1a8dc3135b60dd86257af60004cf4a/$FILE/2013-02-51_Emergency.pdf ht

The FAA directive covers this: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/8a1a8dc3135b60dd86257af60004cf4a/$FILE/2013-02-51_Emergency.pdf http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/... Look on page 2 for what's expected to be done and how it'll be approved.