From FAA DRS. DRS record last changed December 5, 2025.
What it approves
Lycoming VO-540-B1B3 engine, transmission, Bell 47-620-600-25(or -23 modified to -25 by Bell Helicopter Co.) oil cooler, Bell47-671-036-1, and associated changes. (Eligible on skiplane version of Bell 47G-2A only.)
ADs that name this STC · 0
An AD can apply because an STC is installed, or mention one in its text.