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Cabin and interiors

STC ST981SO

FAA DRS lists ST981SO as Current · Reissued, held by Everts Air Cargo, for McDonnell Douglas DC-6A (USAF C-118A), McDonnell Douglas DC-6A (Navy R6D-1), and McDonnell Douglas DC-6B (Navy R6D-1Z). Recorded change: Deactivation of the cabin pressurization system, conversion of the cargo compartment to a class 'E' compartment, and modification of the ventilation system. Snapshot dated June 30, 2026.

FAA-listed holder
Everts Air Cargo
Aircraft configurations
3
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Deactivation of the cabin pressurization system, conversion of the cargo compartment to a class 'E' compartment, and modification of the ventilation system.

ST981SO 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: McDonnell Douglas DC-6A (USAF C-118A), McDonnell Douglas DC-6A (Navy R6D-1), and McDonnell Douglas DC-6B (Navy R6D-1Z). Confirm the approved model list, serial effectivity, configuration, and certificate revision.

McDonnell Douglas DC-6A (USAF C-118A)6A3McDonnell Douglas DC-6A (Navy R6D-1)6A3McDonnell Douglas DC-6B (Navy R6D-1Z)6A4

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact McDonnell Douglas DC-6A (USAF C-118A) and McDonnell Douglas DC-6A (Navy R6D-1), and 1 more aircraft configuration model, serial range, and configuration?
  2. 02Which layout, materials, flammability evidence, and weight changes 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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