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Fuel systems

STC SA5981SW

FAA DRS lists SA5981SW as Current · Reissued, held by RAM Aircraft Limited Partnership, for Cessna Aircraft 421C. Recorded change: Increase maximum ramp weight to 7610 pounds, maximum takeoff weight to 7560 pounds, maximum landing weight is 7200 pounds, maximum zero fuel weight is 6533 pounds. Snapshot dated June 30, 2026.

FAA-listed holder
RAM Aircraft Limited Partnership
Aircraft configurations
1
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Increase maximum ramp weight to 7610 pounds, maximum takeoff weight to 7560 pounds, maximum landing weight is 7200 pounds, maximum zero fuel weight is 6533 pounds.

SA5981SW 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: Cessna Aircraft 421C. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Cessna Aircraft 421CA7CE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Cessna Aircraft 421C 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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