Flap Seal Repair – Revision 2, dated , February 2023, to Gulfstream Service Bulletin dated January 01, 2022, titled Wings – Flaps – Fairing Seal Repair

There has been a revision to SB 150-57-197 and 200-57-426 that addresses the left and right wing flap fairing debonding and corrosion discovered at lower skin of Rib3 and Rib11. This SB provides instructions to remove the flap fairings, inspect for and remove corrosion if present, repair wingskin if necessary and reseal fillet seal between left and right wings structure and fairing to prevent debonding and moisture intrusion.

The Gulfstream Specialists at West Star Aviation have accomplished this SB on G150 and G200s and discovered that most aircraft have been found with corrosion requiring repair.

 The pricing remains the same for the evaluation, but can provide a note that gives you an estimated cost of repair should corrosion be found:

Depending on the amount of corrosion (if found), and possible engineering disposition and repairs, it is highly recommended to perform this service bulletin during an extended maintenance visit.

If skin corrosion or fairing delamination is found upon each fairing removal, additional charges for NDT, Paint Blends and Gulfstream Engineering will be required.  Charges will be billed on a T&M basis.