Maintenance and Modifications
Polymer Flap Roller Bearing for King Airs Gets Transport Canada Nod
Grease-free bearing lasts longer and reduces wear and tear on flap tracks
King Air flap rollers

Marsh Brothers Aviation's grease-free flap roller bearing for 200- and 300-series Beechcraft King Airs has received Transport Canada supplemental type certificate (STC) approval. An FAA STC is pending; in the meantime, U.S. operators of these turboprop twins can have the new-design flap rollers installed under field approvals.

This marks the first polymer bearing solution Marsh Brothers Aviation has developed for civil aircraft and solves a maintenance issue caused by abnormal wear. In fact, an airworthiness directive for these King Airs requires repetitive inspections every 3,000 flight hours for bearing wear and aluminum track damage.