DEVELOPMENT OF BONDED SEAL FOR THE INSTALLATION OF FUEL BOOSTER PUMP IN THE FUEL TANK OF HAL BUILT DO-228 AIRCRAFT.

摘要

Fuel booster pump is installed on the inner wing of the Do228 aircraft with help of three mounting bolts. The bonded seal is required to prevent tbe equalization o( exiting differential pressure between the feeder tank and outside pressure. Some fuel seepage was reported from location of booster pump. Development of the bonded seal was taken up and fuel resistance material for rubber part is selected and also stainless steel selected for the outer ring of the bonded seal. Trial testing samples were installed on one side (LH or RH) of the wing of Do228 aircraft as per Qualification Test Schedule (QTS). Fitment check and Functional check (ground run) of bonded seal on the aircraft are carried out and there is no seepage or leakage was found on the bottom side of the installed position of the fuel booster pump. Performance of bonded seal on all the parameters as per QTS was found satisfactory. This bonded seal can be directly used for the installation of similar joints on anv airworthy system.