| 摘要 |
Apparatus comprising a signal tube (40) extending from an engine component (42) on a hot side of a firewall (44) in a gas turbine engine (30) to an engine control mechanism (46) disposed on a cool side of the firewall. The apparatus includes a fuse (54) in the portion (50) of the signal tube extending through the hot side. The fuse (54) is operative 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). An engine control mechanism (46) operates the engine with 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 (46) to change to a second operating logic which does not utilize the pressure signal.
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