KLM

Document ID: FAA-2006-25738-0016
Document Type: Public Submission
Agency: Federal Aviation Administration
Received Date: December 30 2011, at 12:00 AM Eastern Standard Time
Date Posted: December 30 2011, at 12:00 AM Eastern Standard Time
Comment Start Date: November 14 2011, at 12:00 AM Eastern Standard Time
Comment Due Date: January 13 2012, at 11:59 PM Eastern Standard Time
Tracking Number: 80f8b548
View Document:

This is comment on Proposed Rule

Airworthiness Directives: General Electric Co. CF6 80C2B Series Turbofan Engines

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Regarding table 2 under par (g) (3). In this table ECU PN’s are mentioned which already have the 8.2.R software installed but don’t contain the high risk hardware combination of: 73-0334 (Front Panel Assy conversion) 73-0349 (New Pressure Subsystem) These PN’s are 1471M63P42, 1519M89P32, 1820M33P15, 2121M25P02, 2121M26P02, 2121M29P02. With these PN’s you reduce the engine flame out events due to inclement weather (8.2.R software effect) and still avoid IFSD’s caused by ECU CPU faults since the PN’s don’t contain the high risk hardware combination. Therefore why is a restriction imposed of 60 months or 4500 engine flight cycles after the effective date for these particular PN’s? KLM recommendation Remove this restriction for these particular PN’s.