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Pratt & Whitney Canada Ground Based Software (GBS)

Citation Mustang

User’s Guide

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This guide is designed to assist maintenance and avionics technicians in using the Pratt & Whitney Ground Based Software or GBS to troubleshoot the PW615F-A engine used on

the Cessna Citation Mustang.

The GBS system is sometimes referred to as DPHM which stands for Diagnostics, Prognostics and Health Management. In this document it will be referred to as GBS.

For further information concerning the purchase or subscription of the GBS equipment see the latest revision of P&WC Service Information Letter S.I.L. PW600-002.

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Caution

This document is supplemental information only, and not technical approved data. It does not replace the Cessna Citation Mustang Maintenance Manual or the Pratt & Whitney Canada PW615F-A Line Maintenance Manual.

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Abbreviations

• CDMS= Citation Diagnostics Maintenance System (onboard diagnostics) • DPHM= Diagnostics, Prognostics and Health Management • EEC= Electronic Engine Control • FADEC= Full Authority Digital Engine Control • GBS= Ground Based Software • TLA= Throttle Lever Angle

GBS kit P/N 3072685 consists of the following:

1) PWC69317 Download Cable Assembly 2) PWC90191 RS232-USB Adapter and Cable 3) CD containing the drivers for the RS232-USB adapter 4) CD containing the following software:

a. GBS Transfer Module b. GBS Diagnostic Module (GBSLite) c. Interactive Engine Technical Manual (IETM)

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Make sure that the maintenance switch is in the true position before connecting to the aircraft.

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Connect the cable- pull the carpet up at the back of the drop aisle in the aft cabin.

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Select channel desired (Always download both engines, regardless of fault or issue).

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Make certain that the engine sync switch is off.

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Connect the cable to the laptop computer through the serial port. If the computer does not have a serial port, then use the adapter to connect to the USB port. The driver from the CD must be installed before using the adapter.

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Turn battery power on, avionics is not necessary.

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Open the GBSLite program. The first screen is referred to as the Express Screen.

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Click the Transfer Module button.

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Place PW615F in the window. Then select Download/Upload Program.

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Select Auto in the first window. Then close this screen.

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Choose PW615F in the upper left window.

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Choose Function

EEC Analysis

Trim / Upload

Real-Time Display

Download Data

Sending Data

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EEC Analysis

To review downloads or recordings, select choice 1- EEC Analysis.

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Choose the file desired for review.

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Use this screen to review data as needed. Select the Close button to return to the Express Screen.

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Trim / Upload

To adjust or verify trims, select choice 2- Trim / Upload.

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It is permissible to adjust the values in the white box as necessary for an EEC change.

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Notes on using the Trim / Upload Screen

• Obtain the N1 trim from the respective engine data plate. • Obtain the ITT trim from the respective engine data plate. • Obtain the engine serial number from the respective engine

data plate. Only enter the last 4 numbers. • Use the TLA trim to rig the throttles by using an offset.

Maximum is 5 degrees. • Please see TLA Rigging document for specifics.

After inputting a new value(s), select the Write button.

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It will ask if you want to overwrite the data. Select Yes.

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Click on the Close button to return to the Express Screen.

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Select Trim / Upload again. Verify that the trim values have remained in the memory.

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Real-Time Display

To perform a recording of an engine start, select choice 3- Real-Time Display.

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Use the Record and Stop buttons to record an engine start.

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Look for aircraft in upper left window. If not present then…

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Type aircraft serial number in lower left window and click Add button.

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Make certain that the serial number is transferred to the upper left window.

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Select Position 1 for left engine or Position 2 for right engine.

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Look for engine in upper right window. If not present then…

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Type engine serial number in lower right window and click Add button.

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Make certain that the serial number is transferred to the upper right window. Click OK.

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Click the Close button to return to the Express Screen.

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Download Data

To download faults, select choice 4- Download Data.

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Select OK.

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You should see it writing data. If you receive an error, power the aircraft down for 15 econds and try again. s

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Channel A is complete. Choose channel B before selecting yes. Then select yes.

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You should see it writing data again for the other channel.

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Select the correct aircraft in the upper left window. If not present….

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Then type the serial number in and click add.

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It will transfer to the top left corner. Select OK.

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t will write the data to the hard drive. Then this screen will appear, and data may be I

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Select the Close button to return to the Express Screen. Repeat for the remaining engine.

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Sending Data

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Notes on Sending Data

• Send all data to:

Tony Hershberger Team Mustang Cessna tmhersh

Aircraft Company berger@cessna.textron.com

• If the computer used to download the faults does not have

e-mail capability, then go to the section on

Alternative Method

rom the Express Screen- Click on the Send Data button. F

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Select the Download Data button.

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Select the downloaded data that is to be sent. Click the Open button.

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his will attach the GDC file directly to an e-mail. Type T

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Select the Real Time Display Data button.

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Select the recording that is to be sent. Click the Open button.

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his will attach the GEC file directly to an e-mail. Type T

REFERENCE ONLY tmhershberger@cessna.textron.com in the To section. Click the Send button.

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Sending Data

Alternative Method

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ending Fault DownloadsS

• After the downloads are complete, close the GBSLite program. • Access the hard drive on the laptop and go to this address:

C:\GBS-PWC\Bin\gbstm\dcu\PW615F\DCU_DATA

• The file will have an extension of .gDc and will have an arrow in front of it.

ote: Your computer might have a different letter assigned to it. Modify as necessary. A omplete file will be approximately 152 KB in size.

Sending Real Time Disp

Nc

lay Recordings • After the recordings are taken, close the GBSLite program. • Access the hard driv

C:\GBS-PW • The file will have an extension of .gEc

Note: Your computer might have a different letter assigned to it. Modify as necessary. A complete file will be of varying size dependent on the length of the recording. Take these files and place on a flash drive to send through e-mail on another computer.

e on the laptop and go to this address: C\Bin\gbstm\eec\pw615F\eec_data