A cooling fan assembly (200; 300; 404) comprising: a housing (202; 302) having an inlet (202a; 302a) and an outlet (202b; 302b), the housing (202; 302) comprising a shroud panel (204; 304) disposed at the outlet (202b; 302b); an axial fan (206; 306) disposed in the housing (202; 302), the axial fan (206; 306) configured to draw air from the inlet (202a; 302a) to the outlet (202b; 302b); and wherein the shroud panel (204; 304) comprises a plurality of cutout portions (210; 310) disposed along an airflow path of the axial fan (206; 306), a plurality of fixed members (214; 314) separating the plurality of cutout portions (210; 310), and a plurality of flap members (216; 316), each of the plurality of flap members (216; 316) pivotably attached to one of the plurality of fixed members (214; 314), wherein each of the plurality of flap members (216; 316) is configured to alternate between at least a first position extending away from the shroud panel (204; 304) and a second position within one of the plurality of cutout portions (210; 310), wherein at least one spring-loaded structure (218; 318) is configured to maintain the one of the plurality of flap members (216; 316) in the second position when the axial fan (206; 306) fails to supply a threshold amount of airflow, and wherein the plurality of flap members (216; 316) are configured to extend substantially across an associated one of the plurality of cutout portions (210; 310) while in the second position, and characterized in that at least one spring-loaded structure (218; 318) is configured as a pivot connected between each one of the plurality of flap members (216; 316) and the associated one of the plurality of fixed members (214; 314). a housing (202; 302) having an inlet (202a; 302a) and an outlet (202b; 302b), the housing (202; 302) comprising a shroud panel (204; 304) disposed at the outlet (202b; 302b); an axial fan (206; 306) disposed in the housing (202; 302), the axial fan (206; 306) configured to draw air from the inlet (202a; 302a) to the outlet (202b; 302b); and wherein the shroud panel (204; 304) comprises a plurality of cutout portions (210; 310) disposed along an airflow path of the axial fan (206; 306), a plurality of fixed members (214; 314) separating the plurality of cutout portions (210; 310), and a plurality of flap members (216; 316), each of the plurality of flap members (216; 316) pivotably attached to one of the plurality of fixed members (214; 314), wherein each of the plurality of flap members (216; 316) is configured to alternate between at least a first position extending away from the shroud panel (204; 304) and a second position within one of the plurality of cutout portions (210; 310), wherein at least one spring-loaded structure (218; 318) is configured to maintain the one of the plurality of flap members (216; 316) in the second position when the axial fan (206; 306) fails to supply a threshold amount of airflow, and wherein the plurality of flap members (216; 316) are configured to extend substantially across an associated one of the plurality of cutout portions (210; 310) while in the second position, and characterized in that at least one spring-loaded structure (218; 318) is configured as a pivot connected between each one of the plurality of flap members (216; 316) and the associated one of the plurality of fixed members (214; 314).