A number of ex-USCG Privateers with their glazed noses were converted into the aerial fire bombing role by Transaire Spraying Company of Canyon, Texas. The R-1830-94 Twin Wasps were replaced by more powerful 1700-hp Wright R-2600 Cyclones. These conversions (known as *Super Privateers*) could be identified by the presence of short-stack exhausts which protruded around the circumference of the nacelles. They could carry up to 18,000 pounds of fire-retardant chemical. These planes were operated by the US Forest Service and several Super Privateers were operated by Hawkins & Powers Aviation of Greybull, Wyoming, which used them in the fire-fighting role under contract to the US Forest Service. Some of these aircraft had their nose glazing replaced with North American F-86 Sabre canopies for improved visibility. As of 1997, at least five of these fire-fighting Privateers were still flying. All PB4Y-2/P4Y-2 Privateers modified for firefighting were retired by the US Forest Service after the crash of Privateer N7620C (ex BuNo 66260) on July 18, 2002