Documentation

Cabin Air Compressor Test

ReliablePlane®: CAC Health Test

Version: ReliablePlane® 3.05 (b.125)
Author: SensOS, LLC

Created: 18 May, 2024
Updated: 27 Mar, 2026

If you have any questions that are beyond the scope of this document, Please feel free to email via info@sens-os.com

Description

The CAC Health Check is designed to collect vibration and electrical data from the Air Cabin Compressor unit. The Technician can select a specific Aircraft Model, Tail/ID, System and Component to perform the Test. The data is uploaded to the ReliablePlane® online webapp for further processing and analysis.

Compatibility

This module is compatible with the following sensors/devices:

TPI-WA101


1-Channel / Wireless BLE Piezo-Sensor
Fmax: Up to 10,000 Hz
Spectral Lines of Resolution: Up to 12,800

TPI-9043


3-Channel / Wireless BLE Data Acquisition Unit

Test Procedure

Select the Aircraft Model / Aircraft Tail-ID / Aircraft System / Aircraft Sub-System /Aircraft Component from the tables and press the NEXT button. The tables will show only CAC Test filtered Systems and Sub-Systems.

On the Test Menu screen press the CAC Vibration Test button.

Turn On the vibration sensor and place the sensor in the Axial position of the CAC as shown in the picture (yellow arrow), Select the sensor from the list and wait for the sensor to connmect. After connection the Select button will turn green (the user can start measuring from any other position by pressing the Select button). The sensor will connect to the app and the "Start Test" button will be now Enabled.

Once the CAC is running, press the "Start Test" button to collect the vibration data. Wait until all data is received (100% indicator). The vibration acceleration and velocity overalls will appear as numbers and displayed on the level meters, the time-waveform will appear in the plot, now the user can toggle to see the Vibration spectrum. The plot can be zoom-in or out by pinching on the plot, also cursors can added by pressing the "CRS" button. The cursors can be dragged to any other position.

Repeat the same process for the Radial direction by pressing the "Select" button, choosing the vibration sensor and then pressing the "Start Button" to collect the vibration data. If the system detects a fault, a dialog box will pop explaining the issue. The user can retake any measurement by pressing the "Select" button of the location and pressing the "Start Test" button again to replace the reading.

Once the test is done, press the "Save" button to store the data. A new pop-up will appear allowing to SAVE or CANCEL the reading. Once a reading is saved a bubble will appear besides the "Save" button indicating the number of readings taken for this component. The user can take as many readings as needed, once the data is sync'd to the cloud the reading count will be reset. see: User/Accounts to learn how data is sync'd to the cloud.

Press the "Back" button on the top to return to the previous menu. Now select the "CAC Electrical Test" to perform the MCA test to the CAC.

Turn On the TPI-9043 Unit and select the device from the list.

Place the current clamps on the position T1, T2 and T3 of the CAC and press the START TEST button.

Wait until data us collected and transmitted (100% indicator). The Amps for each Phase will display on the top right of the screen. The Current spectrum for the 3 phases will appear in the plot. The user can retake the reading by pressing the START TEST button again or SAVE the current reading. The user can take as many readings as needed, once the data is sync'd to the cloud the reading count will be reset. see: User/Accounts to learn how data is sync'd to the cloud.