7505 Karl May Drive • Waco Regional Airport • P.O. Box 5219 • Waco, TX 76708
Phone: (254) 752-8381 • Fax: (254) 752-3307 • www.ramaircraft.com

RAM OHE CMG IO-520 to IO-550-C Engine Upgrade STC
For your Beechcraft Baron with CMG IO-520-C and IO-520-CB Engines

• Better Performance
• Improved Reliability

• Increase Resale Value
• TBO Warranty, Transferable
RAM Aircraft, founded in 1976 with a focus on engineering airframe and engine improvements that provide many of general aviation’s most popular airplanes with enhanced performance and reliability. RAM is an engine overhaul facility and general aviation support center, with over 113 engine and airframe STCs, over 800 PMAs, and recently certified by the FAA as a Designated Alteration Station (DAS). D ’ Shannon Aviation, founded in 1965 is the premier supplier of STC’d aftermarket improvements for Bonanza and Baron airplanes. For over 40 years, D’ Shannon Avaition has focused purely on upgrades for the Beechcraft fleet. Products include, tip-tanks, vortex generators,
instrument panel upgrades, baffle cooling kits, engine conversion kits, and propeller upgrades.
Conversion and upgrade package for shipment and installation
by your favorite FBO.

What You Get:

  • RAM OHE Engine Conversion STC for converting your
    IO-520 engines to IO-550-C/RA engines
  • Two RAM OHE CMG IO-550-C/RA Engines
    — 285 to 300 Horsepower Upgrade
    —SAP Millennium Cylinders - NE
    — New Spark Plugs
    — New RAM high-efficiency camshafts - NE
    — New Magnetos and Harnesses
    — Oil Coolers - Flushed and inspected - exchange
    — New Induction Couplings
  • RAM Customer Service and RAM Overhauled Engine TBO Warranty
  • Two D' Shannon Aviation High-Efficiency Baffle Cooling Kits for Your Engines. RAM Special Edition Color Black on Black.
  • D’ Shannon Aviation Upgraded Engine Installation STC STC Authorization Documentation
    Installation Instructions and Drawings
    FAA Approved Supplemental Pilot Operating Handbook
  • D’ Shannon Aviation Customer Service Support Team
  • D’ Shannon Aviation Five-Year Baffle Warranty
For conversion of your
IO-520-CB engines.

For conversion of your
IO-520-C engines,
add $2,000 per engine.

Package Shipped - Exchange
or Custom Exchange

Read below for detailed package information and aircraft applicability.

RAM OHE Engine Conversion STC Shipped Package Includes:

Two RAM OHE Continental
IO-550-C/RA Engines - exchange:

  • Horsepower: 300
  • TBO: 1700 Hours
  • SAP Millennium Cylinders - NE
  • Crankcase, heavy duty with 7th studs: OHE
  • Crankshaft: NE
  • Camshaft - RAM Designed High-Efficiency - NE
  • Starter and Starter Drive: OHE
    [ without freon compressor drive ]
    * see additional specifications

    ( Customer must specify 12v or 24v electrical system )
  • Spark Plugs: New
  • Magneto Harness - Champion: New
  • Magnetos - Champion Slick 6310 (impulse coupled): OHE
  • Fuel Injection System with non-altitude compensation fuel pump: OHE
  • Oil Filter: New
  • Throttle Assembly: OHE
  • Induction Couplings: New
  • D ’ Shannon Avaition Inter-Cylinder Baffles Installed: NE
  • Oil Cooler: Flushed and inspected - exchange
  • Balanced Crankshaft and Rod Sets: Exchange
  • RAM Core Return Policy: Please read
RAM Kit Components - Packaged Separately and Included:
  • Air Filter - RAM: New
  • Induction Hose - manifold to throttle: New
  • Gasket - Throttle: New

OHE = Overhauled Exchange
NE = New Exchange - OEM or PMA New = New Outright - OEM or PMA

Note: New items are subject to test time, ferry time, and inventory time. Product, price, specifications, and availability subject to change without notice.
D’ Shannon Aviation Airframe STC Includes:
  • D’ Shannon Aviation Upgraded Engine Installation STC
    STC Authorization Documentation
    Installation Instructions and Drawings
    FAA Approved Supplemental Pilot Operating Handbook
D’ Shannon Aviation High Efficiency Baffle Cooling Kit:
These high-efficiency baffle cooling kit is made with high temperature, high tear strength, custom molded silicone laced fiberglass core material. They are strong and stiff, yet pliable and resilient enough to ensure a tight fit. Mountings are all new and polyurethane-coated aluminum. Complete set includes, custom fit air baffling and mounting system. D' Shannon Aviation High-Efficiency Baffle Cooling Kits come complete with a five-year warranty. PMA approved on all 58 and E55 Barons with air-conditioning. PMA approval is pending but maybe installed with field approval on all C, D55, and E55 Barons without air-conditioning.
Engine Mount Eligibility:
  • Beechcraft Part Number: 96-910010-61 or -67

    Note: If standard C55 or D55 mounts (PN: 96-910010-1, 96-910010-57) are used, Beechcraft Mandatory Service Bulletin 2362 Rev. 1 and AD 91-15-20 must be completed and the manifold pressure limitations of FMS 3845R apply.

Crankshaft Refund:
  • If the customer provides two serviceable and overhaulable CMG 550 crankshafts, deduct $8,000 from the package price.
Prop Eligibility:
  • McCauley: C512
  • Hartzell: PHC-C3YF-2(U)(F)/(F)7663(B,K)-2R and
    New Super Scimitar with state-of-the-art propeller technology available at
    D ’ Shannon Aviation.
Governor Eligibility:
  • Woodward D210439, A210780, or 210622
    Use B210710 or B210800 with prop synchronizer
D ’ Shannon Aviation Customer Service and Warranty:
  • The Support Team at D ' Shannon Aviation strives to help their customers in every phase of picking and installing their D ' Shannon Aviation STC'd mods. Contact a
    D ' Shannon Aviation Support Team Member by calling 1-800-992-3435. The Support Team's normal business hours are 8:00 a.m. to 5:00 p.m. Central Standard Time, Monday through Friday.
RAM Aircraft Customer Service and
RAM Overhauled Engine TBO Warranty:
  • When you call, you speak with a live person who will make sure that you get the attention you need and deserve.
  • RAM’s IO-550 warranty is the industry’s best. 100% Engine and accessories for the 1st year, or 500 hrs, whichever occurs first. Thereafter, the engine only is warranted on a prorata basis to TBO at RAM’s reduced minimum accrual rate of only 30 hours per month, thus extending coverage over four years. For complete details go to www.ramaircraft.com/ramtbowarranty
Additional Specifications:
  • Exchange Core Policy: Engine, crankcase, exhaust, accessories, propeller, governor, and hardware items are only sold on an exchange basis, based upon the customer's exchange of a normal runout core as removed from subject aircraft, engine type as represented on RAM purchase order, and serviceable to RAM's overhaul specifications. Core should be returned within 30 days of RAM OHE engine shipment, or immediately with a RAM installation.
    Non-serviceable core fees will be due and payable to RAM.
  • Items not included: Vacuum pump, alternator, hoses, exhaust risers and exhaust parts are not included unless specified by an optional purchase order and a work
    order supplement issued at the time of engine order placement.
Customer : Discuss the following with your RAM Representative before ordering.
  • Electrical System: Electrical system currently in airplane must be provided to RAM for proper alternator and starter selection.
  • Aftermarket STCs: Engine parts and accessories required by aftermarket STCs such as, but not limited to, turbo normalizing and fuel pump changes, are not included with a RAM OHE engine. Compatibility of aftermarket STCs with the D ’ Shannon installation STC is required and should be reviewed by installer.
  • Aftermarket STC Parts: Substitution or addition of aftermarket parts is an additional charge. Please review with RAM prior to engine overhaul. Pre-shipment of aftermarket cores may be required.
  • *Starter Adapter: Starter adapter with freon compressor drive - Add: $1,600

Optional Parts and Engine Installation Items
  • New 100 amp Alternator Package: Hartzell Engine Technologies ALV9610 with nut, thrust washer, cotter key, and overhauled alternator drive hub. When purchased with an engine RAM will install for no additional cost. (Retail $2,181) Only when purchased with a RAM engine: $1,662 each - Exchange
  • Cylinder Upgrade Options:
    • Upgrade SAP Millennium cylinders to nickel: $1,700 per engine.
    • Ask your RAM Representative for current market prices for CMG cylinders.

Engine Conversion Package Aircraft Applicability:
  • Baron C55, D55, E55, 58, and 58A with IO-520-C or -CB engines
Contact Us!
RAM Aircraft, LP
Phone: (254) 752-8381
Engine Fax: (254) 752-3307
Parts Fax: (254) 756-0640

D ’ Shannon Aviation
Phone: (800) 291-7616 or (763) 559-5998
Tech Support: (800) 992-3435 or (952) 469-2623
Fax: (763) 535-3759

RAM Aircraft, LP • 7505 Karl May Drive • P.O. Box 5219 • Waco, TX 76708
Phone: (254) 752-8381 • Fax: (254) 752-3307 • www.ramaircraft.com