American Airlines flight attendants plan to picket Tuesday at the carrier’s Fort Worth headquarters and three other airports to protest their pay, uniforms and working conditions.

The purpose of the pickets is to call attention to what the attendants see as unkept promises in the aftermath of American’s (Nasdaq: AAL) merger with US Airways. The picket will be held on the fourth anniversary of the announcement of the merger.

Flight attendants plan to picket American hub airports in Los Angeles,…