Developing Alert Level for Aircraft Components  
Author Wai Yeung Man


Co-Author(s) T.T. Eric Wong


Abstract As per Hong Kong Civil Aviation Department (HKCAD) requirements, all registered aircraft must have an approved maintenance schedule (AMS) to ensure aviation safety. In the AMS, system or component alert level plays an important role in condition-monitored maintenance. An alert level can help the operator to monitor engineering performance of an aircraft system or component during routine operations. This paper illustrates the development of an alert level for a helicopter airconditioning system (ACS). The function of an ACS is to regulate the temperature, humidity, and air flow inside the helicopter. The reliability of the ACS is therefore important to an air operator. Once the alert level is triggered, approved maintenance actions need to be executed, such as component repair or replacement. In this paper, ACS of the helicopter McDonell Douglas 902 Explorer was chosen to illustrate the development of an alert level for the purpose of improving operational performance.


Keywords Helicopter air-conditioning system, reliability, alert level
    Article #:  RQD25-215
Proceedings of 25th ISSAT International Conference on Reliability & Quality in Design
August 1-3, 2019 - Las Vegas, NV, U.S.A.