Heston MRO did not track the work-related hours of personnel with dual management and operational roles (including the licenced aircraft maintenance engineer) for fatigue calculation purposes. Therefore, there was an increased risk of a fatigue related incident involving those personnel.
The ATSB recognises the safety improvements made by Heston MRO with the implementation of a regional manager that does not include the dual role of the LAME maintenance authority certification requirements. Further, now that Heston MRO is tracking the hours of its entire operational work force in accordance with its policies and procedures, the ATSB is satisfied that the safety issue has been adequately addressed.
In January 2024, Heston MRO advised they had taken the following safety action: