What it approves
Installation of observer station in rear seat-baggage compartment area, searchlight and dual speakers in bottom of aft fuselage, windows in baggage compartment area (baggage was removed), and a muffler. (172M NORMAL CATEGORY LANDPLANE ONLY)
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