EASA AD ISR-I-57-2021-12-3R1
Wings - Flaps - Fairing Seal Repair
Airworthiness Directive AD ISR I-57-2021-12-3R1 issued by the State of Israel Civil Aviation Authority addresses the GALP model G150 aircraft, serial numbers 201 through 326. This directive mandates inspection and repair of wing flap fairing seals to prevent flap fairing debonding, moisture intrusion, and corrosion of the wing lower skin at rib 3 and rib 11. The repair must be performed according to Gulfstream Service Bulletin No. 150-57-197 or later approved revisions.