Airworthiness directives › 2009-08-07
AD 2009-08-07 Airworthiness Directives; Honeywell International Inc. ALF502L-2 and ALF502L-2C Turbofan Engines
Applicability*9
This AD applies to Honeywell International Inc. ALF502L-2 and ALF502L-2C turbofan engines with high pressure compressor (HPC) first stage discs, part numbers (P/Ns) 2-101-331-03, 2-101-331-04, and 2-101-331-10, installed. These engines are installed on, but not limited to, Bombardier CL-600-1A11 airplanes.
Compliance
You are responsible for having the actions required by this AD performed at the next shop visit, but not later than 2,500 cycles-in-service after the effective date of this AD, unless the actions have already been done. Visual Inspection (f) For discs with 5,000 or more cycles-since-new on the effective date of this AD, perform a dimensional inspection of the HPC first stage disc to determine if excessive disc balance material was removed. See the following Figure 1 for limits. BILLING CODE 4910-13-P ER13AP09.012 ER13AP09.013 (g) Replace the disc if excessive disc balance material was removed. See limits in Figure 1 of this AD. (h) If the removed balance material condition is acceptable, perform a magnetic particle inspection of the disc rim and slots for cracks using a 3 to 7 power magnification glass. The Engine Overhaul Manual, 72-34-11, Inspection/Check, contains information on the magnetic particle inspection procedure. Contact Honeywell International Inc., 111 S. 34th Street, Phoenix, AZ 85034-2802, U.S.A.; telephone (800) 601-3099, Web site http://portal.honeywell.com/wps/portal/aero, for a copy of this service information. (i) Replace the disc if you find any cracks. Alternative Methods of
Unsafe condition
This AD results from reports of discs found with excessive material removed from the balancing locations of the disc. We are issuing this AD to prevent the discs from fracturing before reaching the currently published life limit. A disc fracture could result in an uncontained failure of the disc and damage to the airplane.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1