Airworthiness Directive · Amendment 39-9345 · Pratt and Whitney Model JT8D-9A Turbofan Engines
Pratt and Whitney Model JT8D-9A Turbofan Engines
Pratt and Whitney (PW) Model JT8D-9A turbofan engines identified by the following Serial Numbers: 656953, 656981, 657299, 657308, 657607, 657608, 657612, 666862, 666868, 666906, 666912, 666915, 666948, 666955, 666957, 666967, 666973, 666987, 667136, 667137, 667143, 667154, and 667165. These engines are installed on but not limited to Boeing 727 and 737 series, and McDonnell Douglas DC-9 series aircraft. Note: This airworthiness directive (AD) applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must use the authority provided in paragraph (d) to request approval from the Federal Aviation Administration (FAA). This approval may address either no action, if the current configuration eliminates the unsafe condition, or different actions necessary to address the unsafe condition described in this AD. Such a request should include an assessment of the effect of the changed configuration on the unsafe condition addressed by this AD. In no case does the presence of any modification, alteration, or repair remove any engine from the applicability of this AD.
This document publishes in theFederal Register an amendment adopting Airworthiness Directive (AD) T95-15-51 that was sent previously to all known U.S. owners and operators of Pratt and Whitney (PW) Model JT8D-9A engines by individual telegrams. This AD requires inspection, and replacement, if necessary, of suspect 7th through 12th stage HPC disks. This amendment is prompted by a report of an uncontained engine failure during takeoff. The actions specified by this AD are intended to prevent an uncontained HPC disk failure and damage to the aircraft.
