The Air Force has removed from service 123 C-130s after “atypical” cracking was found in the lower center wing joint, or “rainbow fitting”, in some aircraft. This affects C-130H and J-model aircraft that have not received the extended service life center wing box and that have greater than 15,000 equivalent flight hours.
The Air Force will inspect all 123 aircraft which takes about eight hours. Replacing the fitting, if necessary, will take 1 to 2 months after the work can be scheduled for depot level maintenance.
This issue does not affect the seven HC-130H aircraft the California Department of Forestry and Fire Protection will be receiving from the Coast Guard since none of them have more than 15,000 equivalent flight hours, according to Dennis Brown CAL FIRE’s Chief of Flight Operations. Those seven aircraft, slated for conversion to air tankers since Congress passed the 2014 National Defense Authorization Act in December, 2013, are still the property of the Coast Guard and have not been officially transferred to CAL FIRE, in spite of the fact that at least one is sporting CAL FIRE livery. The HC-130Hs are waiting for the Air Force to have retardant delivery systems installed in addition to other maintenance requirements.
Over the weekend Coulson Aviation inspected the only C-130 type aircraft they have under U.S. Forest Service contract, Tanker 131, a C-130Q, and no cracking was found, according to Kaari Carpenter, Public Affairs Specialist for the agency.
Coulson also has a C-130Q, T-134, under contract with CAL FIRE that is being used train the agency’s pilots for the transition from S-2Ts to HC-130Hs. Dennis Brown of CAL FIRE said the aircraft is under the 15,000-hour requirement but will be inspected tonight, regardless.
In 2018 Coulson had a civilian version of a C-130, an L-382G, under USFS Call When Needed Contract, but that air tanker has been replaced on the list with a B-737, Tanker 137, which was on contract in Australia during their summer. It was used on a fire in the United States last week, which may be the first time a 737 air tanker has dropped on a fire in North America.
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