Hydraulic leak in landing gear


Airlines use aircraft availability rates as an indicator of their profitability. To keep these rates as high as possible (generally over 95%), airlines, aircraft manufacturers, and OEM (Original Equipment Manufacturers) have strategies and services in place that enable them to respond very quickly (typically within 4 to 24 hours), especially when an aircraft must be grounded.

During a stopover in New York in early 2016, a mail plane showed signs of a leak stemming from one of the braking system’s hydraulic rings.

Although it was a dual-circuit hydraulic system, the damage was deemed critical enough to ground the plane.

The airline alerted the aircraft manufacturer and the main OEM so that repair work could be scheduled as quickly as possible in order to reduce risks and regain an optimal availability rate, while keeping operational losses to a minimum.


A GM Consultant loss adjuster specialising in aviation equipment responded on the scene promptly, accompanied by the technical teams. He made his initial observations, then made arrangements for the repairs. An investigation into the causes of the damage was then carried out in the laboratory.

Thanks to this quick response, operational losses were limited to just one day of AOG (Aircraft On Ground).