Airworthiness directives › 2017-26-05
AD 2017-26-05 Airworthiness Directives; Gulfstream Aerospace Corporation Airplanes
Applicability*9
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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
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.
Unsafe condition
This AD was prompted by a report that certain flap tracks were manufactured with the upper flange thickness less than design minimum. We are issuing this AD to prevent deformation or failure of a flap track that could cause flap actuator failure, “B track” roller overload, flap twisting/failure, or asymmetrical flap track failure. This failure could result in an unrecoverable roll.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1