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P.L. Porter Co. hydraulic lock, P/N HLD8700-31D, No. 287168. Slim cylinder with a threaded rod end at one end, a slotted clevis fitting at the other and a protective bellows boot over the shaft. Porter locks of this family are used in aircraft seats to hold the recline or legrest position until the release control is operated.
Body markings: U.S. PATENT NO. 4155433 & WORLD WIDE, P.L. PORTER CO., WARRANTY EXPIRES 08/2002, NO. 287168, CA 91367.
Manufacturer: P.L. Porter Co., Woodland Hills, CA 91367
Part number: HLD8700-31D
Unit number: 287168
Marking: warranty expires 08/2002
Patent: U.S. 4155433
Condition: as-removed, untested
About the source of this item
From the leftover inventory of an aviation component shop that did inspection, repair and certification work. When the company closed, the remaining stock was sold at sale. That origin matters: this is not random scrap from an unknown garage, it sat in a professional aviation-parts environment. It does not mean the unit was finished, tested or released before the shop closed, and it does not mean it is approved for flight use today.
Sold AS-IS / as-removed. UNTESTED. No current airworthiness tag / no 8130-3. NOT for aircraft installation / not approved for return to service. Not sold as an aircraft part. Sold for display, collecting, flight-sim, study, or repair/overhaul. Buyer assumes all responsibility for any use.
