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Fuel systems

STC SA4-1234

FAA DRS lists SA4-1234 as Current · Reissued, held by ROCKY TOP LEASING INC., for Twin Commander Aircraft 560-F, Twin Commander Aircraft 680, and Twin Commander Aircraft 680-E, and 8 more aircraft configurations. Recorded change: Installation of electrical low fuel warning device to indicate last 25 gallons of useable fuel in main (center) tank. Snapshot dated June 30, 2026.

FAA-listed holder
ROCKY TOP LEASING INC.
Aircraft configurations
11
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Installation of electrical low fuel warning device to indicate last 25 gallons of useable fuel in main (center) tank.

SA4-1234 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 560-F, Twin Commander Aircraft 680, and Twin Commander Aircraft 680-E, and 8 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Twin Commander Aircraft 560-F2A4Twin Commander Aircraft 6802A4Twin Commander Aircraft 680-E2A4Twin Commander Aircraft 680-F2A4Twin Commander Aircraft 680-FL2A4Twin Commander Aircraft 7202A4Twin Commander Aircraft 500-A6A1Twin Commander Aircraft 500-B6A1Twin Commander Aircraft 5606A1Twin Commander Aircraft 560-A6A1Twin Commander Aircraft 560-E6A1

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Twin Commander Aircraft 560-F and Twin Commander Aircraft 680, and 9 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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