Revisions for the ANAC approved SR20 Pilot's Operating Handbook PN 21399-002 with vacuum avionics. Revisions are delivered as loose-leaf pages ready to be inserted into existing POH binders. **NOTE** Revisions only include pages applicable to the requested revision. If multiple revisions are required, each required revision must be ordered. If attempting to update from an ""original issue"" POH to a ""Reissue X"" POH, a brand new POH must be ordered and the existing POH will be unable to be updated. Note: This item is drop-shipped to you directly from our vendor.