How to fix extension ladder rung lock? The black 'flipper' is

Werner 40 ft. Extension Ladder, Aluminum, Type IA D1540-2

Extension ladder rung locks? - RedFlagDeals.com Forums

GOKULAD Rung Lock For Fiberglass Extension Ladder

Extension Ladder Pulley Kit - Compatible with Werner Extension

Flipper Kit 29-1 by Werner

D1240-2, Extension Ladders

Replacement Flipper for Extension Ladder by Dr Romeo Chaire

Extension Ladder Rung Lock Springs

Everlas ET08DR Heavy Duty Triple Extension Ladder 15 Rung 4806MM