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| 520112-3 Helicoil |
Lycoming and Continental spark plug helicoils use a serrated teeth to lock the helicoil in place. Spark plugs come in "short reach" and "long reach". Shown here is the short reach plug with a Continental part number helicoil.
Following a Major Defect Report investigation involving two in-flight incidents of blown spark plugs from the same cylinder position on the same aircraft, there is clear evidence a large number of approved workshops are not aware of the correct procedure for replacing spark-plug-helicoil-inserts. Read more...
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