INNER CASING VACUUM SYSTEM FOR A GAS TURBINE ENGINE CASING

摘要

A method of drilling one or more holes, substantially in situ, in a turbomachine casing includes locating piping including at least one vacuum head within the turbomachine casing in proximity to a hole to be drilled; drilling at least one hole in the casing such that drill chips or shavings caused by the drilling are collected in the vacuum head; and applying a vacuum through the piping to the at least one vacuum head to thereby remove the drill chips or shavings collected in the vacuum head to a location outside the turbomachine casing.