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Fuel systems

STC SA8598SW

FAA DRS lists SA8598SW as Current · Reissued, held by Floats & Fuel Cells, for Twin Commander Aircraft 690A, Twin Commander Aircraft 690, and Twin Commander Aircraft 685, and 5 more aircraft configurations. Recorded change: Installation of P/N GL204-501, lower center fuel tank bladder cells, as a replacement for original bladder P/N 5630204-501. Snapshot dated June 30, 2026.

FAA-listed holder
Floats & Fuel Cells
Aircraft configurations
8
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Installation of P/N GL204-501, lower center fuel tank bladder cells, as a replacement for original bladder P/N 5630204-501.

SA8598SW 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 690A, Twin Commander Aircraft 690, and Twin Commander Aircraft 685, and 5 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Twin Commander Aircraft 690A2A4Twin Commander Aircraft 6902A4Twin Commander Aircraft 6852A4Twin Commander Aircraft 6812A4Twin Commander Aircraft 690B2A4Twin Commander Aircraft 680T2A4Twin Commander Aircraft 680W2A4Twin Commander Aircraft 680V2A4

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Twin Commander Aircraft 690A and Twin Commander Aircraft 690, and 6 more aircraft configurations model, serial range, and configuration?
  2. 02Which tanks, plumbing, usable-fuel assumptions, and inspections apply?
  3. 03Who can legally supply the design data, kit, instructions, and ICAs?
  4. 04What parts, labor, conformity, and return-to-service work are excluded?

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