Main landing gear wheel well hydraulic leak

Effectivity: Global 7500 aircraft

ATA 27

By: Thomas Lebeau – Technical Services 

Bombardier would like to inform operators that an untraceable main landing gear (MLG) wheel well hydraulic leak could be coming from the fuselage drain ports. 

When searching for a hydraulic leak in the FWD portion of the wheel well, if no obvious leakage is noticed after cleaning the area and running the hydraulic systems to find the source, checking the two drain ports for wetness could indicate that there is a hydraulic leak in the fuselage. The drain ports are located on the AFT wing spar (FWD in the wheel well). 

To access the cabin underfloor area, remove floor panel (241ZCF). The leakage could be coming from the hydraulic lines in this area, draining out to the wheel well and through the drain port.