Airworthiness Directives; CFM International S.A. Turbofan Engines
airworthiness · Rule · Final rule. · Published 2013-12-30 · Effective 2014-02-03 · 78 FR 79295
Document
Document number
2013-30862
Federal Register citation
78 FR 79295
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
CFM International S.A. Turbofan
Publication date
2013-12-30
Effective date
2014-02-03
FAA docket
Docket No. FAA-2013-0407
Abstract
We are adopting a new airworthiness directive (AD) for all CFM International (CFM) S.A. CFM56-3 and CFM56-7B series turbofan engines with certain accessory gearboxes (AGBs) not equipped with a handcranking pad "oil dynamic seal" assembly. This AD was prompted by 42 events of total loss of engine oil from CFM56 series turbofan engines while in flight. This AD requires an independent inspection to verify re-installation of the handcranking pad cover after removal of the pad cover for maintenance until installation of a handcranking pad oil dynamic seal assembly. We are issuing this AD to prevent loss of engine oil while in flight, which could result in engine failure, loss of thrust control, and damage to the airplane.