Summary
The FAA is adopting a new airworthiness directive (AD) for General Electric Company (GE) GE90-110B1, GE90-113B, and GE90-115B series turbofan engines with stage 6 low-pressure turbine (LPT) blades, part number (P/N) 1765M37P03 or P/N 1765M37P04, installed. This AD requires initial and repetitive inspections for shroud interlock wear of the stage 6 LPT blades. This AD also requires replacing those blades with stage 6 LPT blades eligible for installation at the next engine shop visit as terminating action to the repetitive blade inspections. This AD results from eight reports of GE90-115B stage 6 LPT single-blade separation events. We are issuing this AD to prevent failure of stage 6 LPT blades, which could result in uncontained engine failure and damage to the airplane.
Directive Details
AD Number
FAA-2009-0143
Document Number
E9-29428
Type
Rule
Publication Date
December 14, 2009
Effective Date
January 19, 2010
Affected Manufacturer
General Electric Company GE90-110B1, GE90-113B, and GE90-115B Series Turbofan
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2009-0143
Topics
Official Documents
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