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Aircraft performance

STC SA249SO

FAA DRS lists SA249SO as Current · Reissued, held by Staggerwing Museum Foundation Inc., for Hawker Beechcraft Army AT-11 and Hawker Beechcraft C18S. Recorded change: Increase in takeoff weight to10,200 lbs. and landing weight to9,800 lbs. and extension of aft C.G. limit to (+120.5) at 10,200 lbs. (Model may also be designated as Conrad 10,200.). Snapshot dated June 30, 2026.

FAA-listed holder
Staggerwing Museum Foundation Inc.
Aircraft configurations
2
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Increase in takeoff weight to10,200 lbs. and landing weight to9,800 lbs. and extension of aft C.G. limit to (+120.5) at 10,200 lbs. (Model may also be designated as Conrad 10,200.).

SA249SO 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: Hawker Beechcraft Army AT-11 and Hawker Beechcraft C18S. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Hawker Beechcraft Army AT-11A-2-582Hawker Beechcraft C18SA-757

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Hawker Beechcraft Army AT-11 and Hawker Beechcraft C18S model, serial range, and configuration?
  2. 02Which limits, loading assumptions, performance data, and supplements 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?

Related aircraft performance STCs

ST00719ATAircraft performance

Approval of increased operating weights as substantiated by the design data listed in Structural Integrity Engineering (SIE) Master Report List or Master Document List No. SIE-28-703, no revision, dated February 24, 1995, or later FAA approved revision. Aircraft with Increase of Maximum Takeoff or Landing Weight must also be modified in accordance with: Drawing SIE-28-901 (taxi weight up to 183,000 lb, landing weight to 164,000 lb), 28-904 (taxi weight up to 178, 500 lbs, landing weight to 164,000 lbs), 28-905 (taxi weight up to 191,000 lb, landing weight to 164,000 lbs), Rev NC or later FAA approved revisions.

FAA holder: Structural Integrity Engineering

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ST00779LAAircraft performance

Installation of side vertical restraints in accordance with approved Master Drawing List SIE 37-703, Revision A, dated May 25, 1999, or later FAA approved revisions. Structural Integrity Engineering FAA Approved Airplane Flight Manual Supplement, SIE 37-607 dated May 26, 1999, or later FAA approved revisions and Weight and Balance Supplement, SIE 37-608, dated February 9, 1999, or later FAA approved revisions, are required as part of this modification.

FAA holder: Structural Integrity Engineering

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