On May 2, 7:40*am, Greg Arnold wrote:
The local towplane operation has a Pawnee that back in 1996 had an STC
from STC Inc. (SA01154AT) modification to the wing attach cluster.
Apparently it still requires a wings off inspection every two years.
The owner of the operation has heard that there may be an inexpensive
permanent fix that eliminates the biennial inspection. *Perhaps a gusset
plate welded onto the cluster. Is anyone familiar with that procedure?

Our wing attach cluster STC repair came from Schweizer and requires
annual inspections, but only the wing removal and dye check ever 6
years. It's not that hard to remove Pawnee wings if you have a hanger
and an engine hoist.

You can research STCs on FAA.gov.