Airworthiness Directives; CFM International, S. A. Turbofan Engines
airworthiness · Rule · Final rule. · Published 2013-07-30 · Effective 2013-09-03 · 78 FR 45842
Document
Document number
2013-17296
Federal Register citation
78 FR 45842
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2013-07-30
Effective date
2013-09-03
FAA docket
Docket No. FAA-2012-1114
Abstract
We are adopting a new airworthiness directive (AD) for certain CFM International, S. A. (CFM) model CFM56-5 and CFM56-5B series turbofan engines. This AD was prompted by corrosion of the delta-P valve in the hydro-mechanical unit (HMU) fuel control caused by exposure to type TS-1 fuel. This AD requires cleaning, inspection, and repair of affected HMUs. We are issuing this AD to prevent seizure of the HMU, leading to failure of one or more engines and damage to the airplane.