News

Clashing damage found to increase over time in at least some compressors

Clashing, the term used to describe the contact between rotating blades and stationary vanes that has occurred in some compressors for GE frame engines, generally does not stop after the blade profile has been changed by impact wear. Recent inspections conducted by Advanced Turbine Support LLC confirm the following: ...

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7EA state-of-the-engine report for 2014 focuses on compressor clashing, blade tip distress

A timely opening presentation by an engaging speaker is critical to the success of most meetings, at least based on the editors’ experience. If the audience connects well with the first presenter, adrenaline flows and the day’s discussion likely will be robust and the give-and-take at breaks and lunch productive. ...

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Clashing damage found to increase over time in at least some compressors

Clashing, the term used to describe the contact between rotating blades and stationary vanes that has occurred in some compressors for GE frame engines, generally does not stop after the blade profile has been changed by impact wear. Recent inspections conducted by Advanced Turbine Support LLC confirm the following: ...

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GE engineers closer to mitigation strategies for clashing, other 7EA S1 issues

Attendees benefit most from user group conferences involving robust participation by owner/operators, OEMs, and third-party services providers because it provides them perspective on various aspects of a particular issue. ...

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TILs 1884, 1854, and 1562 important to achieving high availability with your 7EAs

The 2013 Conference of the 7EA Users Group, conducted at the Hyatt Regency Monterey (Calif) Hotel and Spa, October 22-24, exceeded expectations in terms of participation, venue, and content—at least according to an informal poll by the editors. ...

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7EA S1 liberations occur on units with no history of clashing

7EA owner/operators have been conditioned to look for clashing damage in compressor stages 1 and 2 during inspections. Numerous presentations at the 7EA Users Group and CTOTF meetings by plant personnel, the OEM, Rod Shidler and Mike Hoogsteden of Advanced Turbine Support LLC, and others have kept the fleet on alert. ...

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Field update suggest conducting TIL 1907 inspections as soon as practicable

Cracks in the R0 dovetails of rotor forward shafts on 7FAs and 7FBs are said to be possible in about three-quarters of the gas turbines in the combined fleet, according to knowledgeable industry sources. ...

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