STC SA8599SW
FAA DRS lists SA8599SW as Current · Reissued, held by Floats & Fuel Cells, for Twin Commander Aircraft 690B, Twin Commander Aircraft 685, and Twin Commander Aircraft 690, and 1 more aircraft configuration. Recorded change: Installation of left (right) hand forward inboard fuel tank bladder cells, P/N DF060-507 (LH) and 508(RH) as a replacement for original bladders P/N 5630060-507 (508). Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
SA8599SW identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.
Applicability
Aircraft named in FAA DRS
Named aircraft: Twin Commander Aircraft 690B, Twin Commander Aircraft 685, and Twin Commander Aircraft 690, and 1 more aircraft configuration. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
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Related fuel systems STCs
Remove the 12 gallon fuselage fuel tank and install an 18 gallon fuel tank in the right wing.
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Installation of forward and aft replacement fuel tanks.
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