Business · 13/07/2011Updated: 10/17/2026 · 1 min read

Pratt & Whitney Corp. Proposes New Airworthiness Directive for JT9D-7R4H1 Turbofan Engines

Pratt & Whitney Corp. is proposing a new airworthiness directive to address safety concerns related to high-pressure compressor shafts in their JT9D-7R4H1 turbofan engines, following reports of cracks in five such shafts.

Original source language: Federal Register — Transportation DepartmentOpen original release →

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