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Avionics

STC SA3539WE

FAA DRS lists SA3539WE as Current · Reissued, held by Northrop Grumman Systems Corporation, for Boeing 707-300 Series, Boeing 707-300B Series, and Boeing 707-300C Series. Recorded change: Installation of single, palletized Litton LTN-51 or LTN-72 Inertial Navigation System (707-320C Series). Snapshot dated June 30, 2026.

FAA-listed holder
Northrop Grumman Systems Corporation
Aircraft configurations
3
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Installation of single, palletized Litton LTN-51 or LTN-72 Inertial Navigation System (707-320C Series).

SA3539WE 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: Boeing 707-300 Series, Boeing 707-300B Series, and Boeing 707-300C Series. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Boeing 707-300 Series4A26Boeing 707-300B Series4A26Boeing 707-300C Series4A26

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Boeing 707-300 Series and Boeing 707-300B Series, and 1 more aircraft configuration model, serial range, and configuration?
  2. 02Which part numbers, software versions, interfaces, and manual 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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