by Mike W. Ray
72nd Air Base Wing Public Affairs
9/12/2013 - TINKER AIR FORCE BASE, Okla. -- The
76th Propulsion Maintenance Group at Tinker Air Force Base, Okla., is
increasing its F119 jet engine repair capabilities in response to
approaching maintenance requirements.
Twin F119 turbofan jet engines propel the F-22 Raptor, and the these
engines are scheduled for programmed depot maintenance upon reaching
4,325 total accumulated cycles, said Brian Thompson, F119 program
A cycle spans the period from when the throttle is shifted from down to
full military power and back down again, and Raptor engines have begun
reaching the cycle threshold, he said.
Programmed depot maintenance takes 13 to 14 months to complete, which
includes a total teardown of the modules and their various components.
"We are ramping up repairs of the F119 modules, and more parts will be routed to the component repair cells," Thompson said.
The Oklahoma City Air Logistics Complex received two of the engines this
year and expects two more before the year is out, Thompson said.
The F119 workload at the logistics complex is projected to double in the
fiscal years ahead; eight engines are projected to be repaired in
fiscal year 2014, 16 in 2015 and 32 in 2016, Thompson said.
Currently, there are 23 mechanics working on the engines in the heavy
maintenance center, and by 2017, the group will have 75 to 80 mechanics
working on F119 engines, Thompson said.
And that count only includes the front shops that disassemble the
modules, he added. It does not include scores of mechanics who will be
needed in the back shops to repair the various components removed from
The F119 has five modules -- fan, gearbox, core, low-pressure turbine
and nozzle -- that are disassembled and repaired at the logistics
complex. The modules, in turn, have 405 components.
Some of the component repair work is also performed by the engine manufacturer, Pratt & Whitney, or by contractors.
The first F119 engine sent to Tinker was completed in December 2012. The F-22 entered service in the Air Force eight years ago.