Airworthiness Directive · Amendment 39-19136 · Wings
Gulfstream Aerospace Corporation Airplanes
This AD applies to Gulfstream Aerospace Corporation Model G-1159A (GIII), serial number (S/N) 460; Model G-IV, S/Ns 1129, 1151, 1167, 1175, 1214, and 1380; and Model GIV-X (G450), S/Ns 4118 and 4227 airplanes.
We are adopting a new airworthiness directive (AD) for certain Gulfstream Aerospace Corporation Models G-1159A (GIII), G-IV, and GIV-X airplanes. This AD was prompted by a report that certain flap tracks were manufactured with the upper flange thickness less than design minimum. This AD requires replacing any defective flap track. We are issuing this AD to address the unsafe condition on these products.
Within the next 6 months after January 25, 2018 (the effective date of this AD), replace the flap track C on the left side, part number (P/N) 1159WM20052-105, and/or the flap track C on the right side, P/N 1159WM20052-106, with an airworthy part. Accomplish the replacements following Gulfstream III Customer Bulletin Number 187, Gulfstream G450 Customer Bulletin Number 195, or Gulfstream IV Customer Bulletin Number 240, all dated June 28, 2017, as applicable.
Although Gulfstream III Customer Bulletin Number 187, Gulfstream G450 Customer Bulletin Number 195, and Gulfstream IV Customer Bulletin Number 240, all dated June 28, 2017, specify to submit certain information to the manufacturer, this AD does not require that action.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
