# Search: 25D Release 2026-10-28. Search by a record's number, a model, or words in a record's text. Add &type= for one collection, paged: https://openairdocs.org/search.md?q=25D&type=ad. Types: ad, text (AD text), proposed, saib, acs, ac, acpage (AC pages), stc, stctext (STC certificate text), model, sdr, ntsb (NTSB investigations), incident (FAA reports), repairstation (FAA repair stations). Add &sort=newest or &sort=oldest to order each collection by its own date instead of best match. ## Aircraft and engine models (2) - [Aircraft model](https://openairdocs.org/model/gates-learjet-25d.md): Gates Learjet 25D · 20 registered · registry code 5170514 - [Aircraft model](https://openairdocs.org/model/learjet-25d.md): Learjet 25D · 1 registered · registry code 5170515 ## Airworthiness directives (34) - [AD 86-08-06 R1](https://openairdocs.org/ad/86-08-06-R1.md): Second Stage Turbine Rotor Assembly · Honeywell International TPE331-25AA, TPE331-25AB, TPE331-25DA and 7 more · Effective Dec 21, 1987 > GARRETT TURBINE ENGINE COMPANY (GTEC) Model TPE331-25AA, -25AB, -**25DA**, -**25DB**, -25FA, -43A, -43BL, -47A, -55B… - [AD 89-07-07 R1](https://openairdocs.org/ad/89-07-07-R1.md): Oil Scavenge Pump Assembly · Honeywell International TPE331-1, TPE331-10, TPE331-10R and 26 more · Effective Oct 30, 1989 > Garrett Models TPE331-25AA, -25AB, -**25DA**, -**25DB**, -25FA, -43A, -43BL, -47A, -55B, - 61A, -1, -2, -2UA… - [AD 71-05-07](https://openairdocs.org/ad/71-05-07.md): High Speed Pinion Assembly · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 30 more · Effective Apr 8, 1972 > …TPE331-25B","TPE331-25C","TPE331-**25D**","TPE331-**25DA**","TPE331-**25DB**","TPE331-25E","TPE331-25F","TPE331-25FA… - [AD 84-10-06 R1](https://openairdocs.org/ad/84-10-06-R1.md): Fuel Pump Assemblies · Honeywell International TPE331-1, TPE331-10, TPE331-10B and 45 more · Effective Dec 26, 1984 > …TPE331-25B","TPE331-25C","TPE331-**25D**","TPE331-**25DA**","TPE331-**25DB**","TPE331-25E","TPE331-25F","TPE331-25FA… All 34: https://openairdocs.org/search.md?q=25D&type=ad ## In the text of ADs (24) - [AD 2005-13-36](https://openairdocs.org/ad/2005-13-36.md): (b) Affected ADs · PDF page 2 > …A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, **25D**, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), and… - [AD 2005-23-06](https://openairdocs.org/ad/2005-23-06.md): Request To Expand Applicability · PDF page 1 > …As an example, the commenter mentions that Model 24, 24B, 24D, 24F, 25, 25B, 25C, and **25D** airplanes modified by… - [AD 2005-23-03](https://openairdocs.org/ad/2005-23-03.md): (c) Applicability · PDF page 2 > …A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, **25D**, and 25F airplanes, certificated in any category; having serial numbers… - [AD 2005-23-06](https://openairdocs.org/ad/2005-23-06.md): (c) Applicability · PDF page 3 > …24D, 24D-A, 24E, 24F, 25, 25A, 25B, 25C, **25D**, and 25F airplanes; certificated in any category; modified by Supplemental… All 24: https://openairdocs.org/search.md?q=25D&type=text ## Proposed ADs (4) - [NPRM FAA-2005-20947](https://openairdocs.org/proposed/FAA-2005-20947.md): Learjet · Published Apr 14, 2005 > …A, 24E, 24F, 25, 25A, 25B, 25C, **25D**, and 25F Airplanes Modified by Supplemental Type Certificate… - [NPRM FAA-2005-20872](https://openairdocs.org/proposed/FAA-2005-20872.md): Learjet · Published Apr 6, 2005 > …24F, 24F-A, 25, 25A, 25B, 25C, **25D**, 25F, 28, 29, 31, 31A, 35, 35A (C… - [NPRM FAA-2005-22169](https://openairdocs.org/proposed/FAA-2005-22169.md): Learjet · Published Aug 23, 2005 > …24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, **25D**, and 25F Airplanes - [NPRM FAA-2006-25563](https://openairdocs.org/proposed/FAA-2006-25563.md): Learjet · Published Aug 16, 2006 > …24F, 24F-A, 25, 25A, 25B, 25C, **25D**, 25F, 28, 29, 31, 31A, 35, 35A (C… ## Information bulletins (4) - [SAIB NM-13-38](https://openairdocs.org/saib/NM-13-38.md): Flight Controls Control Column Section · Issued Jun 24, 2013 > …24F","24F-A","25","25A","25B","25C","**25D**","25F","28","29","31","31A","35","35A (C… - [SAIB 2026-07](https://openairdocs.org/saib/2026-07.md): MAIN LANDING GEAR ATTACH SECTION, Trunnion Pins · Issued Mar 19, 2026 > …24F","24F-A","25","25A","25B","25C","**25D**","25F","28","29","31","31A","35","36","36A… - [SAIB NM-16-24](https://openairdocs.org/saib/NM-16-24.md): Fuselage: Main Plate/Skin · Issued Sep 15, 2016 > ["25","25A","25B","25C","**25D**","25F","28","29","31","31A","35","35A (C-21A)","36","36A… - [SAIB NE-16-18](https://openairdocs.org/saib/NE-16-18.md): Power Lever Loss of Power Control · Issued Jul 11, 2016 > …TPE331-25AB","TPE331-25B","TPE331-25C","TPE331-**25D**","TPE331-25DA","TPE331-25DB","TPE331-25E","TPE331-25F… ## Advisory circulars (2) - [AC 65-25D](https://openairdocs.org/ac/65-25D.md): Aviation Maintenance Technician Awards Program · Approved Feb 7, 2007 · superseded or historical - [AC 60-25D](https://openairdocs.org/ac/60-25D.md): Reference Materials and Subject Matter Knowledge Codes for Airman Knowledge Testing · Approved Jun 9, 2000 · superseded or historical ## In the text of advisory circulars (49) - [AC 36-1H](https://openairdocs.org/ac/36-1.md?from=148): Noise Levels for U.S. Certificated and Foreign Aircraft · Page 148 > …94.0 99.3 100.8 2 13 LEARJET **25D** 15.00 13.30 CJ610-6 2 2.95 0… - [AC 36-1H](https://openairdocs.org/ac/36-1.md?from=297): Noise Levels for U.S. Certificated and Foreign Aircraft · Page 297 > …24F 95.313.50 11.90 CJ610-6 40 **25D**/25F 15.00 13.30 CJ610-6/8A 40 95… - [AC 36-1H](https://openairdocs.org/ac/36-1.md?from=250): Noise Levels for U.S. Certificated and Foreign Aircraft · Page 250 > …0 1315.00 13.30 15.00 13.30LEARJET **25D** CJ610-6 20 94.0 14 363.70 299.83AIRBUS… - [AC 36-1H](https://openairdocs.org/ac/36-1.md?from=280): Noise Levels for U.S. Certificated and Foreign Aircraft · Page 280 > …474.00 368.00 RB211-22B 42 102.8 **25D** 15.00 13.30 CJ610-6 40 102.7 14… All 49: https://openairdocs.org/search.md?q=25D&type=acpage ## Supplemental type certificates (202) - [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**"] All 202: https://openairdocs.org/search.md?q=25D&type=stc ## In the text of STC certificates (122) - [STC ST00432WI](https://openairdocs.org/stc/ST00432WI.md): Installation of Avcon fins(Aft Body Strakes). · Avcon Industries Inc · ST00432WI_aml.pdf · Mar 30, 2009 > …for Learjet **25D**/F Series, 35/36 Series Avcon Fin Installation Avcon Industries, Inc. 714 N. Oliver, Hangar… - [STC SA1670SW](https://openairdocs.org/stc/SA1670SW.md): Installation of engine thrust reversers. · The NORDAM Group LLC · Certificate · Oct 24, 2003 > …24, 24A, 24B, 24B-A, 24D, 24D-A, 24E, 24F, 25, 25A, 25B, 25C, **25D**, 25F Date of… - [STC ST01733WI](https://openairdocs.org/stc/ST01733WI.md): Installation of the Quiet Lear Hushkit or Avcon Noise Suppressor · Butler National Corporation · Certificate · Oct 22, 2013 > …24B, 24D, 24F, 25, 25B, 25C, **25D**, 25F Description of Type Design Change: Installation of the Quiet Lear… - [STC SE33WE](https://openairdocs.org/stc/SE33WE.md): Modification of: ( 1) Manual fuel valve and beta cams; (2) Fuel control linkage and propeller servo cam; and (3)Automatic control of bleed valve and engine starting functions; S/N P61801 only · Garrett Turbine Engine Company A Division of the Garrett Corporation · Certificate · Dec 9, 1981 > …TPE 331-**25D**, S/N P61801 Description of Type Design Change: Modification of : (1) Manual fuel valve and… All 122: https://openairdocs.org/search.md?q=25D&type=stctext ## Service difficulty reports (282) - [SDR IKM2002F00001](https://openairdocs.org/sdr/IKM2002F00001.md): Wheel · Lear 25D · Apr 5, 2002 · N347JV > WHEEL, CRACKED, BEAD SEAL AREA. - [SDR 20000329SH039](https://openairdocs.org/sdr/20000329SH039.md): Warning Light · Lear 25D · Mar 2, 2000 · N969SS > EN ROUTE, RIGHT ENGINE FIRE WARNING LIGHT ILLUMINATED BRIEFLY. DIVERTED FLIGHT. FALSE ENGINE FIRE WARNING, CHAFED WIRE. (X) - [SDR 12196900WA](https://openairdocs.org/sdr/12196900WA.md): Switch · Lear 25D · Dec 2, 1996 · N900WA > …ALL WORK DONE IAW LEAR **25D** MM. (X) - [SDR 20010529CW009](https://openairdocs.org/sdr/20010529CW009.md): Control Box · Lear 25D · May 10, 2001 · N800RF > RIGHT ENGINE FIRE LIGHT ON IN FLIGHT. TROUBLESHOOTING PER MM. ALL CIRCUITS TESTED GOOD. REPLACED FIRE DETECT CONTROL… All 282: https://openairdocs.org/search.md?q=25D&type=sdr ## NTSB investigations (13) - [NTSB DCA79AA007](https://openairdocs.org/ntsb/DCA79AA007.md): Lear Jet 25D · Detroit, MI · Jan 19, 1979 · N137GL · 6 fatal > …4022 79/1/19 Detroit,MI Lear jet **25D** cr- 2 0 0 noncommercial ATP,flight instr., age… - [NTSB FTW80DA104](https://openairdocs.org/ntsb/FTW80DA104.md): Beech 65-90 · Ruidoso, NM · Aug 15, 1980 · N516WB · No injuries > …Failure Remarks- r brake master cyl,goodrich pn 0-000010-8S,failed. Collided w lear jet **25D**,N45DM. - [NTSB ERA17WA289](https://openairdocs.org/ntsb/ERA17WA289.md): Learjet 25 · Naiguata, Venezuela · Aug 19, 2017 · 5 fatal > On August 19, 2017, about 0415 universal coordinated time, a Learjet **25D**, Venezuelan registration YV3191, descended and impacted… - [NTSB CHI03LA007](https://openairdocs.org/ntsb/CHI03LA007.md): Madewell EAA-Biplane-P · Forest Lake, MN · Oct 9, 2002 · N21WL · No injuries > …The Title 14 CFR Part 91 flight departed Forest Lake Airport (**25D**), Forest Lake, Minnesota, at 1705 on… All 13: https://openairdocs.org/search.md?q=25D&type=ntsb ## FAA accident and incident reports (84) - [Incident 19790728012869I](https://openairdocs.org/incident/19790728012869I.md): Lear 25D · Teterboro, NJ · Jul 28, 1979 · N220HS > Aircraft struck bird on final approach. - [Incident 19810608054819I](https://openairdocs.org/incident/19810608054819I.md): Lear 25D · Newark, NJ · Jun 8, 1981 · N2426 > Engine failed due to faulty fuel controller. - [Incident 19800815066619I](https://openairdocs.org/incident/19800815066619I.md): Lear 25D · Ft Worth, TX · Aug 15, 1980 · N16GT > Flight diverted, engine shut down due to false fire warning. - [Incident 19851124072299I](https://openairdocs.org/incident/19851124072299I.md): Lear 25D · Pittsfield, MA · Nov 24, 1985 · N744LC > Adf malfunctioned, aircraft flew a considerable distance from final approach fix. Maintained VFR. All 84: https://openairdocs.org/search.md?q=25D&type=incident