| 摘要 |
<p>Method comprising providing a signal tube (40) extending generally from an engine component (42) disposed on a hot side of a firewall (44) in a gas turbine engine (30) to at least one engine control mechanism (46) disposed on a cool side of the firewall. A fuse (54) in the signal tube is operable responsive to a breach (70) in the signal tube (40) to change from a first condition to a second condition to prevent an over-temperature situation on the cool side of the firewall (44). The engine control mechanism operates the engine according to a first operating logic utilizing a pressure signal related to a static pressure of a fluid in the signal tube. Loss of the pressure signal causes the engine control mechanism to change to a second operating logic which does not utilize the pressure signal.</p> |
