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1. What is a DAC?
2. Why should I be doing trend monitoring?
3. How do I get you my trend data?
4. How often do I need to send you my trend data?
5. Why should I use The Trend Group?
6. What type of problems will trend monitoring pick up?
7. Wouldn't the pilot notice any problems?
8. How do I get started? Enrollment forms?
9. Does trend monitoring allow me to extend my time between overhaul (TBO)?
10. Does trend monitoring allow me to waive my hot section inspection (HSI)?
11. Can't I just do this myself?
12. Will you process my old data too?
13. How much does the service cost?

14. Is The Trend Group approved by the FAA?
15. I'm Part 91, do I need to do this?
16. What if I don't fly enough to do trend monitoring?
17. How is this different from doing oil analysis?


1. What is a DAC?

A Designated Analysis Center (DAC) is an organization approved by Pratt & Whitney Canada to provide trend monitoring and analysis service to those who do not have the time, experienced personnel, or resources to conduct their own analysis. The Trend Group was selected by Pratt & Whitney Canada as the first Designated Analysis Center. Read more. TOP

2. Why should I be doing trend monitoring?

Trend monitoring will benefit you by reducing operating costs, enhancing safety, improving maintenance planning, preserving aircraft value, and increasing schedule intervals. Read more. TOP

3. How do I get you my trend data?

The data can be collected either manually or automatically and sent to The Trend Group for processing using any of the following methods:

. Fax - Trend data can be recorded on trend sheets provided by The Trend Group or on the clients own flight log. The manually recorded data can be faxed to The Trend Group 24 hours a day at (800) 297-6499 from within the U.S. or (559) 297-6499 outside the U.S.

. Email - Data that has been downloaded from an automatic data recorder or that has been entered into an electronic format can be emailed to The Trend Group at data@thetrendgroup.com

. Internet - Our website offers clients the ability to enter their manually recorded data 24 hours a day.

. Mail - Data downloaded from an automatic recorder and stored on a floppy disk or other memory device can be sent via mail or courier. Some clients may also elect to send large quantities of manually recorded data via mail or courier. Our shipping address is:

The Trend Group
1486 Tollhouse Rd. #101
Clovis, CA 93611
USA

TOP

4. How often do I need to send you my trend data?

As frequently as possible. Trend monitoring is meant to catch problems at the earliest possible point. In order to do so, data must be sent on a regular basis. The Trend Group recommends at least once a week if the aircraft is flying. Data should be submitted in accordance with your maintenance program or the manufacturer's recommendations, whichever is more frequent. TOP

5. Why should I use The Trend Group?

Focus, Experience, Expertise, & Innovation TOP

6. What type of problems will trend monitoring pick up?

. Early hot section deterioration
. Hot starts
. Faulty fuel nozzles
. Dirty or eroded compressors
. FOD damage
. Bleed air leaks
. Instrumentation errors

TOP

7. Wouldn't the pilot notice any problems?

Pilots should notice large changes in the engines performance. Since trend monitoring is meant to detect subtle changes in performance, in most cases it will reveal problems before they are evident in the cockpit. TOP

8. How do I get started? Enrollment forms?

You can contact our office for the enrollment forms. Completed forms may be faxed, emailed, or mailed to us. TOP

9. Does trend monitoring allow me to extend my time between overhaul (TBO)?

While trend monitoring is often one of the requirements for obtaining an overhaul extension, it is not the only requirement. Contact your engine manufacturer or your local Flight Standards District Office for additional information. TOP

10. Does trend monitoring allow me to waive my hot section inspection (HSI)?

Pratt & Whitney Canada has the following requirements for operating your hot section "On-Condition," which means the HSI interval would be based on the trend monitoring graphs instead of the recommended hard time.

When approved by your local Airworthiness Authority and the engine's Maintenance Manual and/or Service Bulletin,  initiate ECTM® within the first 100 hours of operation of a new, newly hot sectioned Hot Section Inspection (you must do a compressor performance recovery wash, after HSI, to establish the engine performance baseline on PT6A engines), or newly overhauled engine. Please refer to the applicable P&WC documentation for information about the "On Condition HSI".

Contact the appropriate OEM for on-condition information for other engine types. TOP

11. Can't I just do this myself?

In order for trend monitoring to have maximum value, it must be done regularly by experienced personnel trained in gas turbine engine behavior. Trend Group provides a turnkey solution to your trend monitoring needs that will not be jeopardized by employee turnover, training deficiencies, absences, or a lack of focus. TOP

12. Will you process my old data too?

Historical data is valuable in assessing an accurate baseline to determine the engine's current condition. There may be an additional charge to process and analyze the historical data depending on the amount and the format of the data. TOP

13. How much does the service cost?

The annual cost of the Trend Group's service starts at $1,125.00 USD per aircraft and varies by aircraft depending on the aircraft and engine type. Contact our office for information on your aircraft. TOP

14. Is The Trend Group approved by the FAA?

The Trend Group is approved by Pratt &Whitney Canada to provide trend monitoring and analysis service. The various airworthiness authorities generally accept this approval. TOP

15. I'm Part 91, do I need to do this?

Although trend monitoring is not required in the Federal Aviation Regulations for Part 91 operators, the benefits of trend monitoring extend well beyond any regulatory compliance. TOP

16. What if I don't fly enough to do trend monitoring?

Low utilization often leads to problems with o-rings, gaskets, seals, and corrosion. These faults can directly affect the gas path performance of your engine such as P3 air leaks, bleed valve leaks, and pressurization problems.

The only situation in which low utilization would affect trend monitoring is if the data are not being recorded as frequently as necessary or if the data are not analyzed as often as necessary. TOP

17. How is this different from doing oil analysis?

Oil analysis is an invaluable tool in the monitoring of a turbine engine. Oil sampling will identify bearing, gears, bushings, accessories, and other lubrication issues. Trend monitoring provides the best representation of the condition of your gas path. TOP

 

     

 

      (C)2005 The Trend Group. All Rights Reserved | info@thetrendgroup.com | Po Box 642 Clovis, CA 93613 | T: 559.297.6490 | F: 559.297.6499