FAA TCDS 3A19: Cessna 150, A150, 152 and A152

What TCDS 3A19 establishes

For the Cessna 150 guide, this source supports the distinction between ordinary production ranges and explicitly listed special serials. A model designation from the type certificate is a certification identity; it is not a statement that every aircraft with that designation has identical equipment today.

Special serials take precedence over interval matching

Serial 15064970 is assigned to A150M despite its position inside the numeric 150G sequence. A1500433 is excluded from A150L and assigned to A152. The guide therefore shows exclusions alongside the ranges and retains the out-of-family A152 assignment as an exception. Omitting that exception would create a false 150-family result.

The special serials 617, 628, 644 and 649 have model identities in the serial guide, but no established model years. A short serial is not an invitation to manufacture a normal production-year assignment. Owners and buyers should carry that uncertainty into aircraft-record research.

Using certification identity in maintenance research

A correct model and serial identify the starting applicability group for manuals, engines, propellers and airworthiness-directive research. They do not demonstrate AD compliance, an installed modification or the current weight-and-balance configuration. Mechanics still need the controlling document and aircraft-specific evidence for the task being considered.

For an aircraft with an alteration history, compare the type-certificate identity with the approval and installation records for the changed equipment. A certificate can describe the original approved model while an STC and the aircraft records explain a later installation. Preserve both contexts when asking about a replacement propeller, an engine conversion or the correct operating supplement.

Certificate editions and Cessna 152 installations

Use the revision stated in the type certificate being consulted and read the relevant model section and notes together. An older maintenance entry may cite an earlier edition. That can explain the reference used at the time, but present applicability requires the controlling approval and any subsequent changes. A matching document number alone does not settle which model conditions apply.

The same aircraft certificate reference is used in the Cessna 152 engine and installation relationships. Read the L2C aircraft rating and N2C effectivity with their own model and serial conditions. A common certificate number does not authorize transferring one model’s engine, weight or operating limits to another.