Parts - Citation Engines

Download Sierra 2011 Catalog PDF

Discover FLEX - the Fanjet Life EXtension program for JT15D engines

a cost-effective solution for aircraft whose engines are approaching TBO. The FLEX (Fanjet Live EXtension) program provides an attractive alternative to engine overhaul, allowing you to safely operate your engines to 5,250 hours. The FLEX program extends the useful operating life of your engines up to 5,250 hours depending upon times, cycles and condition of the internal components. Aircraft owners may enroll in the FLEX program at any time up to TBO and in some cases even beyond.

FLEX provides this additional time at far less expense than engine overhaul cost, or even the cost of buying a used replacement engine. For a modest enrollment fee (less than $50K for two engines) and a nominal monthly subscription fee, you’ll enjoy many more years of confident, trouble-free flight.

Click on the FLEX logo to learn more about this affordable alternative to costly engine overhauls.


Need a replacement engine for your classic Citation? Take advantage of special limited-time pricing on premium pre-owned engines. Highlighted in green below, these as-removed mid-time engines will keep your Citation flying for years to come at a fraction of the cost (and time) of overhauling your existing engines. Sierra STCs are available for installation on Citation 500 and 501 models. Download a spec sheet or call us for details.

Specification sheets available here:

  • Engines have been preserved for long-term storage IAW per Pratt & whitney JT15D Maintenance Manual requirements.
  • Engines furnished with engine logbooks and longbook entry showing removal and times & cycles.
  • Prior to removal, all engines have passed the IAW Pratt & Whitney Maintenance Manual 5-point ground run check.
  • Engine mounts are included where available.
  • Engines are offered FOB Uvalde, Texas with no engine crate included. Crates are available for sale or lease - please inquire.

It is the responsibility of the purchaser to ensure the validity of the specifications.