In general terms, prior to the change from the CAA to the FAA, the documents now known as the TCDS were called Aircraft Specifications. And some still are titled as such even though they are listed in the TCDS database. These particular documents are also formatted with an “A” prefix like A-691.
Very interesting Wrench1, I did not make that distinction, thanks! I have used these TCDS's for decades for STC approval projects, and had wondered a little about the format change in document numbers. And then to confuse me more, the Transport Canada and EASA TCDS numbers do presently follow the "A-###" format (Cessna 206H is Transport Canada TCDS number A-212.
Where the original installers erred was not making the necessary physical changes (ie., stall warning, fuel, etc.) to the -88 structure to make it compliant to a -99 wing structure assy
Yeah, the big miss was that the leading edge skins for the 182Q and 185F where the stall horn is installed are different, as the square hole is in a different position on the leading edge radius. This was a matter of: a) using the wrong parts, and b), not thinking to actually confirm all of the differences. On a 185, the [functioning] stall warning system is TCDS basic required equipment, so the fact that is was not installed correctly, and thus did not work at all, was a definite error.