Flight Test of a Self-Generating Overheat Detection System.
Final rept. Oct 72-Sep 75,
NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J
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Flight tests were conducted on two self-generating overheat detection systems installed in the number two nacelle of a Federal Aviation Administration FAA Convair CV880. The systems were mounted inboard and outboard in the nacelle paralleling the existing aircraft system. The outboard system logged 722.2 flight hours with no problems reported. The inboard system logged 615.0 flight hours. Shortly after the inboard system was installed, overheat warnings were obtained when the thrust reversers were used. The problem was found in the control box which caused the system to alarm at a lower temperature than was set. The inboard system then operated flawlessly for 585.9 flight hours until another problem in the control box caused the system to cease operating completely. No false alarms were noted, at any time, from electrical noise. It is concluded that the self-generating system tested is an airworthy system which should decrease the false fire warning rate in engine nacelles.
- Terminal Flight Facilities
- Jet and Gas Turbine Engines