# Search: 25D

Supplemental type certificates: 202 matches in release 2026-11-05. Page 1.

- [STC SA368EA](https://openairdocs.org/stc/SA368EA.md): Installation of AiResearch engine Model TPE 331-25D, TPE 331-25DA, TPE-25DB, or TPE 331-71 and Hartzell propeller Model HC-B3TN-5C/T10178C. · PC6-AU23 Spares LLC
  > Installation of AiResearch engine Model TPE 331-**25D**, TPE 331-**25DA**, TPE-**25DB**, or…
- [STC SE50WE](https://openairdocs.org/stc/SE50WE.md): One engine only.  Modification of a Model TPE331-25DAL to. incorporate the engine components associated with a torque and temperature 1imitinq system in accordance with AiResearch Kit PIN 896642-1. An en9ine incorporating this kit is reidentified as a Model TPE331-25DALT . · Garrett Turbine Engine Company Division of Garret Corporation
  > …Modification of a Model TPE331-**25DAL** to. incorporate the engine components associated with a…
- [STC SA4034WE](https://openairdocs.org/stc/SA4034WE.md): Installation of Canadian Marconi CMA-771 Omega/VLF navigation system. · Learjet Inc
  > ["Learjet **25D**"]
- [STC ST00578DE](https://openairdocs.org/stc/ST00578DE.md): Reduce number of passenger seats installed from 8 to 4 passengers. · International Jet Aviation Services
  > ["**25D**"]
- [STC SA4433NM](https://openairdocs.org/stc/SA4433NM.md): Installation of communication and navigation systems electronic controls. · Learjet Inc
  > ["**25D**","28","29"]
- [STC SA1292CE](https://openairdocs.org/stc/SA1292CE.md): Installation of JET DAC-20003-D RNAV system. · Learjet Inc
  > ["Learjet 24E","Learjet **25D**","Learjet 25F"]
- [STC SA4434NM](https://openairdocs.org/stc/SA4434NM.md): Installation of Wulfsburg Flitefone. · Learjet Inc
  > ["**25D**","35","35A (C-21A)","36","36A"]
- [STC SA4436NM](https://openairdocs.org/stc/SA4436NM.md): Installation of Flight Instrument System. · Learjet Inc
  > ["**25D**","35","35A (C-21A)","36","36A"]
- [STC SA4060WE](https://openairdocs.org/stc/SA4060WE.md): Installation of Sunair ASB-500 high frequency radio communication system. · Learjet Inc
  > ["Learjet **25D**","Learjet 35","Learjet 35A (C-21A)"]
- [STC SA1295CE](https://openairdocs.org/stc/SA1295CE.md): Installation of Intercontinental Dynamics Corp. RAD/BAR altimeter with voice terrain advisory/glideslope. · Learjet Inc
  > ["Learjet 24E","Learjet **25D**","Learjet 25F"]
- [STC SA4053NM](https://openairdocs.org/stc/SA4053NM.md): Installation of emergency medical system. · Intl Jet Aviation Svcs
  > ["25","25A","25B","25C","**25D**","25F"]
- [STC ST00432WI](https://openairdocs.org/stc/ST00432WI.md): Installation of Avcon fins(Aft Body Strakes). · Avcon Industries Inc
  > ["**25D**","25F","35","35A (C-21A)","36","36A"]
- [STC ST02356CH](https://openairdocs.org/stc/ST02356CH.md): Installation of Top-Mounted TCAS Directional Antenna Structural Provisions. · Stevens Aviation Inc.
  > ["25","25A","25B","25C","**25D**","25F"]
- [STC SE7547SW](https://openairdocs.org/stc/SE7547SW.md): Install Garrett P/N 865558-16 or865558-1E propeller pitch control cam. · Peacock Joe N
  > ["TPE331-61-A","TPE331-25FA","TPE331-25F","TPE331-**25DA**","TPE331-43-A","TPE331-25A…
- [STC SA3891WE](https://openairdocs.org/stc/SA3891WE.md): Installation of Sunair Model ASB-130 high frequency radio communication system. · Learjet Inc
  > ["Learjet **25D**","Learjet 25","Learjet 25B","Learjet 28","Learjet 25A"]
- [STC SA944NW](https://openairdocs.org/stc/SA944NW.md): Installation of the XR Drag Reduction System · Avcon Industries Inc
  > ["24","24B","24D","25","25B","25C","**25D**","25F"]
- [STC SA3227WE](https://openairdocs.org/stc/SA3227WE.md): Installation of an AiResearch TPE331-1-101Z, TPE331-25DA or TPE331-25FA turboprop engine. · Stilwell Floyd D
  > Installation of an AiResearch TPE331-1-101Z, TPE331-**25DA** or TPE331-25FA turboprop engine.
- [STC SA4399NM](https://openairdocs.org/stc/SA4399NM.md): Installation of high frequency radio communications system. · Learjet Inc
  > ["**25D**","25F","28","29","35","35A (C-21A)","36","36A"]
- [STC SA1414CE](https://openairdocs.org/stc/SA1414CE.md): Installation of the Litton LTN-72 inertial navigation system with search mode (72-5 and 72-15 programs.) · Learjet Inc
  > ["Learjet 24F","Learjet 24E","Learjet 25F","Learjet **25D**"]
- [STC SA216RM](https://openairdocs.org/stc/SA216RM.md): Installation of Collins FCS-80 flight control system. (LEARJET 25 modified per ECR 936) · Learjet Inc
  > ["Learjet 25B","Learjet 25","Learjet 25C","Learjet 25F","Learjet **25D**"]

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