Xiaojun Xu

Document ID: FAA-2010-0217-0002
Document Type: Public Submission
Agency: Federal Aviation Administration
Received Date: April 09 2010, at 12:00 AM Eastern Daylight Time
Date Posted: April 9 2010, at 12:00 AM Eastern Standard Time
Comment Start Date: March 25 2010, at 12:00 AM Eastern Standard Time
Comment Due Date: May 24 2010, at 11:59 PM Eastern Standard Time
Tracking Number: 80ad3a65
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This is comment on Rule

Airworthiness Directives: Pratt and Whitney (PW) PW4000 Series Turbofan Engines

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There were several HPC drums scrap during the FPI due to the cracks found at the location which pointed in the proposed AD .It will definitely increase the maintenance cost for the subject engines ,and decrease the life to the LLP.As we know,the price of the HPC drum is over $500,000.So as an airlines,we request P&W to provide a compensation or enconomic support to the scrap parts.