Airworthiness Directive · Amendment 39-12262 · General Electric Company CT58 Series and Former Military T58 Series Turboshaft Engines
General Electric Company CT58 Series and Former Military T58 Series Turboshaft Engines
This airworthiness directive (AD) is applicable to General Electric Company (GE) CT58-140-1, -140-2, and former military T58- GE-5, -8F, -10, -100, and -402 turboshaft engines, with fuel flow divider assemblies part numbers (P/N's) 4050T82G02, or 5040T77G02 having temperature control assemblies with serial numbers (SN's) with the first two digits of 95, 96, 97, 98, or 99 installed. These engines are installed on, but not limited to Agusta S.p.A. AS-6N, Boeing Vertol 107-11, Sikorsky S-61 Series and S-62 Series, and the following surplus military helicopters that have been certified in accordance with sections 21.25 or 21.27 of the Federal Aviation Regulations (14 CFR 21.25 or 21.27): Carson S-61L, Firefly UH-1F, Glacier CH-3E, Quentin HH52A, Robinson Air Crane CH-3C, CH-3E, HH- 3C, and HH-3E, Sikorsky S-61A, S-61D, S-61E, S-61V, and S-61V-1, and Siller Helicopters CH-3A, and SH-3A.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain General Electric Company (GE) CT58 series and former military T58 series turboshaft engines. This action requires the removal from service of certain fuel flow divider assemblies, and replacement with serviceable parts. This amendment is prompted by reports of large volumes of fuel leakage from end caps on fuel flow divider assemblies. The actions specified in this AD are intended to prevent fuel flow divider assembly fuel leakage, which could cause an engine fire, leading to an in-flight engine shutdown and forced landing.
