From FAA DRS. DRS record last changed December 5, 2025.
What it approves
Installation of S-TEC System 55 Two Axis Automatic Flight Guidance System, model ST-558, with Optional Automatic Electric Trim System. Eligible when modified per STC SA1525WE (Robertson STOL).
ADs that name this STC · 0
An AD can apply because an STC is installed, or mention one in its text.