Summary
The FAA is adopting a new airworthiness directive (AD) for all Pratt & Whitney Canada Corp. (P&WC) PT6B-37A model turboshaft engines with engine serial number PCE-PU0289 and earlier. This AD was prompted by a report of contamination from galvanic corrosion between the fuel control unit (FCU) aluminum body and the steel union fitting causing the loss of engine control, resulting in an engine over-speed condition and subsequent in-flight shutdown (IFSD). This AD requires replacing the FCU with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.
Directive Details
AD Number
FAA-2020-0471
Document Number
2020-19299
Type
Rule
Publication Date
September 2, 2020
Effective Date
October 7, 2020
Affected Manufacturer
Pratt & Whitney Canada Corp. Turboshaft
Criticality
routine
Emergency
No
Docket ID
Docket No. FAA-2020-0471
Topics
Official Documents
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