FAA 2020-17-14

Requires an inspection for chafing or interference of some hydraulic pipes and certain rib passage holes and, depending on findings, modification or repair. Prompted by a report of hydraulic fluid on the ground near the main landing gear brake assembly. The hydraulic leakage started in a cracked hydraulic pipe, with the crack likely due to chafing between two hydraulic pipes or between hydraulic pipes and the structure.