Aircraft
Certification Service Washington, DC U.S. Department of Transportation Federal Aviation Administration
NE-09-31 R1
July 9, 2009
This is information only. Recommendations
aren’t mandatory.
Introduction
This Revised Special Airworthiness Information Bulletin (SAIB) corrects
the serial number and alerts you, owners and operators of Hawker
Beechcraft Corporation Model 60, 60A and 60B (Duke), equipped with a
Lycoming TIO-541-E1C4 engine, of a potential discrepancy with a rebuilt
Kelly Aerospace Energy Systems (KAES) T1879 model turbocharger, part
number, 407540-9003; serial number, JAR00401. All other information
remains the same. This rebuilt turbocharger was shipped from KAES to
Aviall (a distributor) on December 19, 2006. At this time, the
airworthiness concern is not an unsafe condition that would warrant an
airworthiness directive (AD) action under Title 14 of the Code of
Federal Aviation Regulations (14 CFR) part 39.
Background
Incoming inspections of new KAES turbocharger backplates by a
distributor revealed a production run of backplates that were machined
without an oil galley, adjacent to a thrust bearing. All affected
backplates which were individually distributed have been located and
all but one turbocharger assembled with an affected backplate has been
located. While the FAA is unaware of any safety related issues with the
turbocharger in question, functional and durability issues with the
assembly might exist. These issues include, but are not limited to, the
inability to achieve rated critical altitude or engine performance,
inability to achieve reliable and repeatable manifold pressure
settings, sluggish and or unstable turbocharger operation, and the
inability to meet expected component life.
Recommendations
We recommend that owners and operators of Hawker Beechcraft Corporation
Model 60, 60A and 60B (Duke), equipped with a Lycoming TIO-541-E1C4
engine determine if turbocharger, part number, 407540-9003; serial
number, JAR00401, is installed. If the subject turbocharger is
installed, we recommend that the turbocharger be replaced as soon as
possible with a serviceable assembly.
For Further Information Contact
Gary Wechsler, Aerospace Engineer, FAA, Atlanta Aircraft Certification
Office, One Crown Center, 1895 Phoenix Boulevard, Suite 450, Atlanta,
GA 30349; telephone (770) 703-6086; fax (770) 703-6055; e-mail:
gary.wechsler@faa.gov.
For Related Service Information Contact
Kelly Aerospace Energy Systems, LLC; 2900 Selma Hwy, Montgomery, AL 36108; telephone (877) 359-5355 or (334) 386-5400.