Airworthiness Directives; General Electric Company Turbofan Engines
airworthiness · Rule · Final rule. · Published 2020-12-16 · Effective 2021-01-21 · 85 FR 81378
Document
Document number
2020-27628
Federal Register citation
85 FR 81378
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
General Electric Company Turbofan
Publication date
2020-12-16
Effective date
2021-01-21
FAA docket
Docket No. FAA-2020-0592
Abstract
The FAA is adopting a new airworthiness directive (AD) for all General Electric Company (GE) GEnx-1B64/P2, GEnx-1B67/P2, GEnx-1B70/75/ P2, GEnx-1B70/P2, GEnx-1B70C/P2, GEnx-1B74/75/P2, GEnx-1B76/P2, GEnx- 1B76A/P2, and GEnx-2B67/P model turbofan engines with a certain high- pressure turbine (HPT) rotor stage 2 disk installed. This AD was prompted by a report of the potential for undetected subsurface anomalies formed during the manufacturing process that could result in uncontained failure of the HPT rotor stage 2 disk. This AD requires an immersion ultrasonic inspection (USI) of the HPT rotor stage 2 disk and, depending on the results of the inspection, replacement of the HPT rotor stage 2 disk with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.