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Seat Adjustment Springs for Piper Aircraft

Replacement springs just got more affordable!

  • Direct replacement - no conversion kit required.
  • One required per bucket seat.
  • Avoid downtime and expense of repeated overhauls.

Replacements for both styles now available:

Gas Spring Style - P/N MC587-404

  • Replaces Piper P/N 587-404 or 89178-010*.
  • Originals were manufactured by Stabilus Bloc-O-Lift or Gas Springs Corp Easy Lift.
  • M10x1 metric thread (~0.39 inch diameter)
  • Adapter P/N MC37902-06 also available (threads on end of spring)

*Some Piper parts catalogues do not list part number 587-404 separately, but list an assembly part number of 89178-010 instead. McFarlane P/N MC587-404 replaces the spring component of this assembly and adapter P/N MC37902-06 replaces the block.

Coil Spring/Hydraulic Style - P/N MC555-692

  • McFarlane replaces the old coil spring/hydraulic style with a gas spring.
  • Replaces Piper P/N 76445-000 or 555-692.
  • Originals were manufactured by P. L. Porter Hydrolok.
  • 3/8-24 UNF thread.

Maintenance Tip:
Aircraft make, model and serial number are not sufficient to ensure the correct replacement spring as many aircraft may have been originally equipped with either one or retrofitted with a conversion kit. If the spring you are replacing is marked with a brand name (e.g. P. L. Porter or Stabilus) the correct replacement is readily identified. The coil spring/hydraulic style are also identifiable by a 1-1/4" diameter visible coil spring. The thread may also be measured to verify the correct identification.

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Hello and welcome to our website. Contained within these pages is most of the information found in our printed catalogue, all available to order online! In addition you can search our entire inventory of over 125,000 part numbers.

Stock and pricing of all parts listed on this site is live, all prices exclude VAT and shipping. All orders are subject to our standard terms and conditions.

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All our stock is available for next day delivery. In addition we have distributorships for Aircraft Tool Supply, LP Aero Plastics, Falcon Gauge, Ceconite / Randolph and Shield Technology to name but a few!

We are also the UK and European distributor for Aircraft Spruce and Speciality, with whom we have been doing business with for over 25 years.

Should you ever need any further information then our experienced sales team are just a phone call or email away and will happily answer any questions you may have.