When searching around for ACA Hurricane material, I ran across this city document from last year. It details the replacement of the Hurricane 130 MKII at Abnet Field. Its chopper motor must have failed since the siren already did not rotate or use its blower assembly - certainly a "significant mechanical failure". A new 2001-130 was installed to replace the Hurricane.
http://www.cityoflacrescent-mn.gov/wp-c ... 5-PDF1.pdf
La Crescent, MN used to have at least two Hurricane 130 MKIIs. Neither were in full working order, being relegated to low-volume directional sirens. The other Hurricane at Kistler Park was taken down in 2012 following storm damage.
I did manage to find the Abnet Field siren on Google Maps. It appears the horn turned gray from several years of sun exposure.
The Hurricane horns were slightly tilted to let rain water leak out. Some have a more notable tilt than others. They were never symmetrical like the Federal Thunderbolt.