Gases, providing the necessary debris.

GEAR STRUT ACTUATOR MAIN LANDING GEAR DOOR ATTACH LEADING EDGE ( COATED RCC TEE SEAL LEADING EDGE - WING SECTION COATED RCC LEADING EDGE SPAR (INTERNAL INCONEL 718 INSULATION FITTINGS NOT SHOWN) HRSI HRS! AND LRSI FILLER BAR.