Summary
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.
Directive Details
AD Number
FAA-2012-1114
Document Number
2013-17296
Type
Rule
Publication Date
July 30, 2013
Effective Date
September 3, 2013
Affected Manufacturer
CFM International, S. A. Turbofan
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2012-1114
Topics
Official Documents
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