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Engine and powerplant

STC SA1573NM

FAA DRS lists SA1573NM as Current · Reissued, held by Learjet Inc., for Learjet Learjet 35A (C-21A). Recorded change: Replacement of the existing fan speed indicators (N1), turbine speed indicators (N2), and interstage turbine temperature indicators (ITT) with Intercontinental Dynamics Corp. (IDC) indicators. Snapshot dated June 30, 2026.

FAA-listed holder
Learjet Inc.
Aircraft configurations
1
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Replacement of the existing fan speed indicators (N1), turbine speed indicators (N2), and interstage turbine temperature indicators (ITT) with Intercontinental Dynamics Corp. (IDC) indicators.

SA1573NM 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: Learjet Learjet 35A (C-21A). Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Learjet Learjet 35A (C-21A)A10CE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Learjet Learjet 35A (C-21A) model, serial range, and configuration?
  2. 02Which powerplant configuration, limits, instruments, and maintenance data 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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