munirabbasi Posted August 10, 2014 Share Posted August 10, 2014 1.We are facing false Engine fire WX light on/blink , T-handle along with master light during flight there were no actual happening.But operation was normal these sequence of aircraft.What could be possible reason or remedial precautionary we replaced FCUs. 2. When HF is communicated (TX) Master fire light blink along turbine over heat light in T-handle. Regards Munir Abbasi (Retire) ATI Home of Hercules traning center Pakistan Quote Link to comment Share on other sites More sharing options...
n1dp Posted August 10, 2014 Share Posted August 10, 2014 When the fire warning control box fails, (located in the dry bay) it often give false indications of a fire. Your HF problem is most likely a problem with the screen/shielding between the HF Coupler unit and the HF antenna mast. When you transmit on HF the Radio Frequency (RF) energy is leaking inside the aircraft and inducing currents in the warning systems you mentioned. Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted August 10, 2014 Author Share Posted August 10, 2014 Thaks, providing useful information .your service for hercules operator always remember hour & dignity Regards Munir Abbasi ATI home hercules training center pakistan Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted August 12, 2014 Author Share Posted August 12, 2014 When the fire warning control box fails, (located in the dry bay) it often give false indications of a fire. Dear n1dp How we can improve reliability of FCU to eliminate false fire WX n1dp Quote Link to comment Share on other sites More sharing options...
n1dp Posted August 12, 2014 Share Posted August 12, 2014 We never had that many failures of the FCU. It seemed to be pretty reliable. Considering it is located in the drybay, it held up very well. It is a sealed unit, so I suppose vibration and temperature changes just wear out the internal components. Quote Link to comment Share on other sites More sharing options...
munirabbasi Posted August 13, 2014 Author Share Posted August 13, 2014 We never had that many failures of the FCU. It seemed to be pretty reliable. Considering it is located in the drybay, it held up very well. It is a sealed unit, so I suppose vibration and temperature changes just wear out the internal components. Dear n1dp thanks for providing technical support. i thank we can improve the reliability & serviceability by testing/calibration on I level capability Regards Munir Abbasi ATI Hercules training center pakistan Regard Quote Link to comment Share on other sites More sharing options...
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