Aircraft Maintenance Technology

APR-MAY 2018

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AIRLINE sions of MEDA investigator workshops were offered to Boeing customers and maintenance organizations around the world, which trained and retrained over 2,300 investigators. • MEDA is a systematic and comprehensive yet highly customizable investigative process/tool; it can be easily integrated with other existing investigative programs. • MEDA helps a maintenance organization to fulfill the "event investigation" requirement by national aviation authorities for maintenance human factors program. • Airlines and other maintenance organizations are not required to share data. • MEDA is supported/endorsed by labor unions/groups. Boeing works closely with safety programs with Lufthansa Technik (LHT) and provided MEDA support to seven different LHT sites and Lufthansa Airlines around the world between April 2013 and March 2018. HOW LUFTHANSA TECHNIK USES MEDA WITHIN ITS SMS At the beginning of 2000, Lufthansa Technik (LHT) started to use the MEDA concept for error management within line maintenance, which enabled LHT to support transparent analysis and error solutions, and consequently created conditions for sustainable improvement. Soon after, LHT became interested in making this standard usable for the entire product range of the LHT Group. In addition to the standardized risk assessment, the collection of error and cause categories helps to identify systematic issues. So it was natural that the MEDA methodology was integrated as a part of the LHT's SMS. Due to the variety of products (e.g., line, base, shop maintenance), it was necessary to adapt the MEDA concept to the needs of LHT. In the MEDA concept the error categories are focused on maintenance system failure (Section III in the MEDA Results Form). This is perfectly designed for the needs of line maintenance and was easily transferred to base maintenance. For the component and engine service, however, it was necessary to expand the categorization. The same applied to the requirements of the design and production organization of LHT. There are similar considerations in the industry today that have led to the discussion about Component Error Decision Aid as a counterpart to MEDA. However, since LHT conducts the investigations worldwide using a standard IT system called q/star, the error categories were simply extended to meet LHT specific needs. For this reason LHT uses the term "error categories" instead of "maintenance system failure." To make specific extensions of MEDA concept transparent, the LHT investigation process in q/star is called MEDA plus, which is considered an important tool in its quality/safety toolbox. LHT experience in collecting investigation data has shown that the categorization of contributing factors or cause categories (as LHT named it), is commonly applicable. When combined with the product or process data, the categories are informative, allow quick detection of systematic vulnerabilities, and thus help to ensure better product and process stability (see Figure 2). On this basis, appropriate significant improvements can then be demonstrated within a reasonable period of time. Boeing works closely with safety programs with Lufthansa Technik (LHT) and provided MEDA support to seven different LHT sites and Lufthansa Airlines around the world between April 2013 and March 2018. LUFTHANSA TECHNIK DR. MAGGIE J. MA is a Certified Human Factors Professional (CHFP) who specializes in maintenance human factors. She is an associate technical fellow at Boeing where she enjoys supporting Boeing customers and other maintenance organizations on safety programs such as MEDA and Maintenance Line Operations Safety Assessment (M-LOSA) around the world. MS. ANJA KOSCHINSKI is head of quality monitoring and reporting at Lufthansa Technik AG, Ms. Koschinski has a diploma in business education and is a Certified Systemic Consultant. She is responsible for the central processes of the LHT Group around SMS as well as the associated IT applications. 12 APRIL/MAY 2018 AIRCRAFT MAINTENANCE TECHNOLOGY

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