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Avionics

STC ST04256CH

FAA DRS lists ST04256CH as Current · Reissued, held by HONEYWELL INTERNATIONAL INC., for Boeing 757-200 Series, Boeing 757-300 Series, and Boeing 757-200CB Series, and 1 more aircraft configuration. Recorded change: Retrofit Installation of Honeywell ALA-52B Radio Altimeter System. Snapshot dated June 30, 2026.

FAA-listed holder
HONEYWELL INTERNATIONAL INC.
Aircraft configurations
4
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Retrofit Installation of Honeywell ALA-52B Radio Altimeter System.

ST04256CH 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 757-200 Series, Boeing 757-300 Series, and Boeing 757-200CB Series, and 1 more aircraft configuration. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Boeing 757-200 SeriesA2NMBoeing 757-300 SeriesA2NMBoeing 757-200CB SeriesA2NMBoeing 757-200PF SeriesA2NM

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Boeing 757-200 Series and Boeing 757-300 Series, and 2 more aircraft configurations 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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