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Fuel systems

STC SE956GL

FAA DRS lists SE956GL as Current · Surrendered, held by EAA Aviation Foundation, for Textron Lycoming AVCO O-540-B2C5, Textron Lycoming AVCO O-540-B4A5, and Textron Lycoming AVCO O-540-B4B5, and 5 more aircraft configurations. Recorded change: Superseded by STC SE01943CH. Add approved fuel: unleaded automotive gasoline, 87 minimum antiknock index. Snapshot dated June 30, 2026.

FAA-listed holder
EAA Aviation Foundation
Aircraft configurations
8
FAA revision date
FAA status
Current · Surrendered

Recorded modification

What the FAA record covers

Superseded by STC SE01943CH. Add approved fuel: unleaded automotive gasoline, 87 minimum antiknock index.

SE956GL 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: Textron Lycoming AVCO O-540-B2C5, Textron Lycoming AVCO O-540-B4A5, and Textron Lycoming AVCO O-540-B4B5, and 5 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Textron Lycoming AVCO O-540-B2C5E-295
Textron Lycoming AVCO O-540-B4A5E-295
Textron Lycoming AVCO O-540-B4B5E-295Textron Lycoming AVCO O-540-B1A5E-295
Textron Lycoming AVCO O-540-B1D5E-295
Textron Lycoming AVCO O-540-B2A5E-295
Textron Lycoming AVCO O-540-B2B5E-295Textron Lycoming AVCO O-540-B1B5E-295

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Textron Lycoming AVCO O-540-B2C5 and Textron Lycoming AVCO O-540-B4A5, and 6 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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