Crankshafts receive a thorough inspection upon arrival. A serial number is permanently etched onto the part. Crankshafts are then disassembled, cleaned, and Magnetic Particle inspected. If no cracks or metallurgical flaws are found, a detailed dimensional evaluation and visual inspection is performed. Crankshafts found within repair limits will be repaired on a custom shop order to your specification. If bearing journals are reground the crankshaft must be renitrided to restore wear surface hardness and increase fatigue strength. A second Magnetic Particle inspection is done and the propeller flange is cadmium plated for corrosion protection. Precision digital dynamic balancing is available which improves longevity and results in a smoother running engine. Counterweight assembly onto the crankshaft is available. An 8130 maintenance release is issued and the unit is custom foam packaged for shipping.

new.jpgLycoming crankshaft customers - Aircraft Specialties is happy to announce we have finally found a reliable and predictable solution to restoring the dimensional requirements of Lycoming’s Service Bulletin 475C.  We have partnered with an aerospace-quality plating supplier capable providing chrome that is precise and durable.  This will result in a huge time saving and predictable delivery times.  For customers wishing to avoid long processing times and want the ability to utilize any standard crankshaft drive gear – this is the best alternative.


MPI, Dimension & Advise (Certify if Possible)

4 Cylinder $164.00
6 Cylinder $218.00
8 Cylinder $339.00


Premium Polish Service - MPI, Dim, Cad Plate Flange and Certify

4 Cylinder $427.00
6 Cylinder $503.00
8 Cylinder $675.00


Grind Journal - Single Set (Rods or Mains) to Manufacturer's Limits
(Renitride, Cad Plate, Micro Polish, and Certify)

4 Cylinder  $555.00
6 Cylinder $740.00
8 Cylinder $1026.00


Grind Journals (Rods and Mains) to Manufacturer's Limits
(Renitride, Cad Plate, Micro Polish, and Certify)

4 Cylinder - Less Nitride (A65, A75, C85 - M10) $524.00
4 Cylinder  $621.00
6 Cylinder $827.00
8 Cylinder $1242.00
Small Continental - M20 STC* (A65, A75, C85, O200) $632.00

 * Price includes STC authorization. STC paperwork separately is $225.



Continental Service Bulletins and Repairs

Ultrasonic Inspect IAW AD 87-23-08  
     Included with Grind or Polish $103.00
     Ultrasonic Inspection Only $162.00
     MPI and Ultrasonic Inspection $211.00
Propeller flange repair $243.00

Lycoming Service Bulletins and Repairs

Machine Gear Mount Counter Bore Dia. Oversize P005, P010. P015 $281.00
Chrome Repair Gear Mount Counter-Bore Back to Standard $1075.00
Machine Gear Pilot Mounting Face $125.00
Repair Corrosion in Front Main I.D. Bore $319.00
(Per S.B505/530, or S.I. 1511 or IAW Overhaul Manual)  
Grind Front Main I.D. Bore (ASI Repair 0014) $378.00
Propeller Flange Repair $290.00
Replace Sludge Tubes Each     $9.00

Common/Other Repairs

Cad Plate & Bake Crankshaft Flange (All) $152.00
Chrome Repair Propeller Pilot (Lycoming or Continental) $513.00
Oil Seal Repair (Lycoming or Continental) $254.00
Replace Dowel (Lycoming or Continental) $27.00
Chrome Repair Rear Gear Mount (Franklin) $513.00
Non-Repairable Inspection Fee (all Crankshafts) $71.00


Crankshaft Dynamic Balance

4 Cylinder Crankshaft $195.00
6 Cylinder Crankshaft $243.00
8 Cylinder Crankshaft $335.00

 Note: Price shown is with overhaul. IF stand-alone add $75. Balance with counterweights included, add $30.


Lycoming Crankshaft Gears

Inspect and/or modify for Compliance with S.B. 475C $98.00
Chrome Customer’s Gear Oversize to fit Pilot Counter Bore. (Repair 07-09-08) $227.00



Continental (most)  Re-bush $49.00
Lycoming (all)   Re-bush $135.00
Continental GTSIO-520 – Repair for Re-use $179.00
Replace Counterweight Bushings in Crankshaft - Per Blade $38.00
Assemble Counterweights on Crankshaft $71.00
Case Harden Continental Counterweight to Comply with S.B. 00-3
Tufftride Requirement and Install Bushing
Continental GO-300 Counterweights RFQ



Prices listed above are “per item” and do not include parts, except where noted. All prices USD.
Five day turnaround is normally available upon request for all items above except crankshafts requiring re-nitriding. 
Certain items may be issued a Dual Release (FAA/EASA). Prices are subject to change without notice.


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Disclaimer: While reasonable efforts have been made to ensure all information on this website is accurate, Aircraft Specialties Services does not assume responsibility for any errors or omissions. All specifications, illustrations, data and prices are subject to change without notice. Applications and interchangeability information depicted on this website is strictly for reference only. Installers must consult the engine/airframe IPC for the manufacturer’s approved data. All prices "each" unless specified. Images represent attributes, not quantity. Application information is provided for reference only. Make sure to refer to the applicable airframe/engine manufacturer's manual for exact application information.