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Method for diagnosing a fault in an air-conditioning pack of an aircraft

  • US 10,228,687 B2
  • Filed: 02/21/2014
  • Issued: 03/12/2019
  • Est. Priority Date: 02/21/2014
  • Status: Active Grant
First Claim
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1. A method of diagnosing a fault in an air-conditioning pack of an aircraft where the air-conditioning pack includes one or more sensors outputting data related to air-conditioning pack temperature, air-conditioning pack pressure, or air-conditioning pack valve position, the method comprising:

  • transmitting data from at least one of the sensors operably coupled to the air-conditioning pack during one of a pre-flight, a post-flight, or a longest cruise;

    comparing the transmitted data to a predetermined threshold at least twice, defining multiple comparisons;

    diagnosing, by a controller, a fault of a primary heat exchanger of the air-conditioning pack based on the multiple comparisons of the transmitted data to the predetermined thresholds when the multiple comparisons indicate a water extractor temperature above the predetermined threshold and a compressor outlet temperature above the predetermined threshold;

    providing an indication of the diagnosed fault; and

    performing maintenance of the air-conditioning pack in accordance with the indication of the diagnosed fault.

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