What it approves
Convert Lycoming aircraft engine Model O-540-B2B5 or O-540-B2C5 rated at 235 hp at 2575 rpm to a O-540-B2B5-C-AlD5 or O-540-B2C5-C-A1D5 rated at 250 hp at 2575 rpm maximum
What the certificate says
From the PDF’s text layer, without the form’s printed wording. Layout and order may differ; the PDF is the record.
This certificate is a scan without a text layerOpen the PDF to read it.
ADs that name this STC · 0
An AD can apply because an STC is installed, or mention one in its text.
No AD in this release names this STC