Tue, Mar 17, 2009
Additional 300 Cylinders Added To MSB Revision
Teledyne Continental Motors has
issued its first revision to a Mandatory Service Bulletin issued
last month, calling for replacement of certain cylinders. The
updated MSB adds 300 additional cylinders, manufactured since
August 2006... 15 months longer than the original timeline.
As ANN reported, on February 12 TCM issued a
voluntary recall on certain piston cylinders produced and shipped
since November 2007, after owners reported cylinder head cracking
found during regular maintenance inspections. That MSB affected
cylinders on certain 470, 520 and 550 series engine models; the
expanded MSB covers the same engine modes, but now indicates
problems may have appeared on cylinders older than in the original
Per the MSB, "TCM has determined that the EQ3 cylinder head
casting tool used in the manufacturing process created an area of
reduced thickness that may result in a crack after prolonged
operation. This crack manifests itself in the area between the
upper sparkplug bore and the fuel injector/primer nozzle bore.
"The cracked cylinders returned to date have occurred on engines
from high use fleet operations with occurrence times ranging from
approximately 430 to 1,300 total hours. Replacement cylinders
conforming to proven production history will be provided."
There have been no reported accidents or incidents stemming from
the manufacturing defect.
The company hopes to avoid issuance of an Airworthiness Bulletin
on the problem, stating it believes all suspect cylinders can be
replaced within the next year, on TCM's dime.
Also: Eclipse Improvements, AEA Urges NextGen GA Fund Adoption, FAA OKs External Cams, GA Accident Rate Declines The FAA has granted an STC to Cool City Avionics for the installati>[...]
Also: Chris Heintz, Lear 70/75 Certs, Beluga Birthday, Leap Frogs 9/11 Jump Cancelled, Lawyers Sue NTSB The Commercial Spaceflight Federation congratulates NASA and the winners of >[...]
Avidyne's Long-Awaited IFD540 Finally Gets A Chance To Show Its R9 Roots If you are looking for the bells and whistles of modern avionics you missed an opportunity if you were not >[...]
ASTM International ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of i>[...]
Basic empty weight includes the standard empty weight plus optional and special equipment that has been installed.>[...]