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| Pilots how to do ECTM® Engine Condition Trend Monitoring The accuracy of a trend analysis will depend on the quality of the data input into the program. There is only one flight configuration where engine reaction is predictable it is the cruise condition. The following restrictions apply for the data to be valid: Record data once per day. If a flight has more than one leg, select the one with the longest cruise, and that is at a representative altitude and airspeed. The trend will be more accurate, if the readings that are taking from day to day remain with in the same altitude band (± 3000 ft.). There will of course be flights where this is not possible. Don’t write the altitude in flight levels. If the altimeter indicates 24.020 ft. write that, not FL 240 (Record altitude at 1013 mb / 29.92” Hg). Always use Captains altimeter and speed indicator. Set cruise power. Allow the engines to stabilise for 5 minutes, without any power lever movement. Do not adjust the power- or prop levers, to get nice identical figures, before readings are made. This is called targeting and will make the trend very inaccurate. It is separate engines, they are not supposed to run identical. The same flight configuration must be repeated (i.e. electrical load, bleed air extraction). Avoid reading mistakes (parallax errors), lean over so that readings are made directly in front of the instruments, and not from the side. Get a decimal point reading when possible (don’t round numbers). The mechanic must remember to add maintenance codes, if there has been performed work on the aircraft that can affect the ECTM®
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Danish Engine Trend Analyzing - Aaholmvej
22 - DK-9870 - Sindal - Denmark - Phone + 45 96 78 20 00 - Fax + 45 96 78 20 01