faq - engine trend monitor

ETM Questions




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Why do I need the Shadin Avionics ETM? 
  • Engine trend monitoring detects engine problems before secondary damage occurs. It may extend the aircraft's TBO which could result in dramatic savings. The Shadin Avionics ETM can reduce engine maintenance costs, reduce down time, and increase the market value of the aircraft. 
Why is "WRONG KEY" being displayed?
  • Each key is data-stamped with the parameters of an individual aircraft. It is possible that a key specific to one aircraft being inserted in the wrong aircraft. Another possible reason is that particular parameters in the ETM may have been manually changed. Re-initialize the key after reading it using your PC and Key Reader.
What does "Memory Status 123" mean?
  • Memory is lost. The unit may be re-programmed in the field. Contact Technical Support for instructions. You may also choose to return the processor to Shadin Avionics for repair. Call Technical Support for a Return Material Authorization (RMA) number and quote. 
What is the default password set at the factory?
  • Shadin Avionics sets the password at "A". This password remains until it is manually changed to a customized password of your choice. It is recommended that you record the password in a safe place.
What if I forget my password?
  • It is imperative to remember your password or the unit must be returned to the factory for repair.
Will the Shadin Avionics ETM record exceedence data even if the key is not installed?
  • Yes. The Shadin Avionics ETM will continue to record exceedences in the exceedence file review section.
What do I do if the fuel flow read-out is incorrect?
  • Ensure the K-factor is set correctly to match the K-Factor imprinted on the side of the Transducer. Refer to the Engine Entry File chapter of the Security Section "Selecting the Fuel Flow K-Factor" procedure in the Operating Manual.
How often should the Data Key be downloaded?
  • It depends on how often the aircraft is flown. Shadin Avionics recommends downloading the Data Key as often as possible, or at least once per week.
How will I know when my data key is full?
  • The display will start flashing when the key is 80% full, and report the memory used in 5% increments thereafter.
What will trend monitoring identify?
  • Hot section deterioration, hot starts, faulty fuel nozzles, dirty compressors, foreign object damage, bleed leaks, and instrumentation errors.
Why should I monitor my engine trends?
  • Early detection of engine problems may prevent costly secondary damage. It will lower engine maintenance cost, increase safety, reduce down time, and increase the marketability of your aircraft.
When should a trend monitoring program be implemented?
  • Engine monitoring may begin at any time; the most accurate baseline is obtained when trend monitoring is implemented within the first one hundred (100) hours of engine life or once newly overhauled. If trend monitoring is started two to three (2 -3) months prior to overhaul or hot section inspection, it will provide a means of judging the effectiveness of a hot section or overhaul.
How much does the system cost?
  • Compare our system quote to the cost of a hot section inspection saved by using a Shadin Avionics ETM, and consider the cost of preventable, major repairs from deterioration in the gas path.
Why is the Shadin Avionics ETM automatic trending better than the hand-trending?
  • Automated, non-biased record keeping eliminates the (subjective) human factor and saves hours of manual work. 
Will the Shadin Avionics ETM show me how the engine is doing by the fuel flow or by the temperature of the turbine section?
  • Yes. It also displays torque, NG (gas generator speed) and NP (prop speed).
How long does the average ETM installation take?
  • This depends entirely on the number of engines, the installer's experience and whether or not the aircraft is already open for other modifications. An average ETM installation is 24 - 60 hours. Contact your local avionics shop for a firm quote.
What is the cost/time required to trend data from the Shadin Avionics ETM automatically?
  • Trend houses like the Trend Group and DETA-TREND turn data analysis around in graphical format in less than six (6) hours. 
Can the Shadin Avionics ETM replace a different manufacturer's system installed at the factory?
  • Yes. Contact your Avionics Shop for details.
Does the Shadin Avionics ETM do the trending? How does it relate to the P&W ECTM program?
  • No, It records the data to be trended. The Shadin Avionics Fleetview program assists this process and is now available in an easy-to-use WindowsTM format. The Shadin Avionics system is compatible with the P&W ECTM program.
Does the Shadin Avionics ETM record exceedences? Cycles? Starts? Hot starts?
  • Yes. With the new Shadin Avionics Fleetview program in Windows format, this information is even easier to view.
How is "exceedence" defined?
  • Exceedence is an event when the engine is pushed to parameters beyond the aircraft specifications. Shadin Avionics' ETM system is based on the airframe manufacturer's specifications which may differ from Pratt & Whitney's engine model specifications
Aside from engine trending, what are the other features offered by the Shadin Avionics ETM?
  • The Shadin Avionics ETM system provides fuel flow, airdata, and back-up navigation information. It also serves as a digital backup to the engine gauges.
What happens if you wrap the Datakey?
  • Contact Shadin Avionics Technical Support Dept. for procedural details. 
What if my aircraft isn't listed on your STC list?
  • We may be able to help you with a Form 337 Field Approval or mutually pursue an STC. Contact Shadin Avionics Sales. 
What is the Pratt & Whitney H/ECTM?
  • This is trending software provided by Pratt & Whitney that Shadin Avionics' Fleetview program interfaces with that graphs ITT, FF, etc. over the course of the life of the engine.
What kind of parameters are custom configured on the ETM for my aircraft?
  • Your aircraft serial number, GPS models, reminder for annual inspections, fuel units of measurement, engine serial number(s). 
What are the benefits of having my Shadin Avionics ETM interfaced with my GPS?
  • When the Shadin Avionics ETM is interfaced with your GPS, fuel management information, airdata, wind direction and speed, etc. are displayed for your reference


Shadin Avionics Service Center
6831 Oxford Street
St Louis Park, MN  55426
service@shadin.com
1.800.328.0584 or 1.952.927.6500

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