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Aircraft and engine models · 2

Aircraft modelGates Learjet 25D20 registered · registry code 5170514 Aircraft modelLearjet 25D1 registered · registry code 5170515

Airworthiness directives · 34

AD 86-08-06 R1Second Stage Turbine Rotor Assembly · Honeywell International TPE331-25AA, TPE331-25AB, TPE331-25DA and 7 moreGARRETT TURBINE ENGINE COMPANY (GTEC) Model TPE331-25AA, -25AB, -25DA, -25DB, -25FA, -43A, -43BL, -47A, -55B…Effective Dec 21, 1987 AD 89-07-07 R1Oil Scavenge Pump Assembly · Honeywell International TPE331-1, TPE331-10, TPE331-10R and 26 moreGarrett Models TPE331-25AA, -25AB, -25DA, -25DB, -25FA, -43A, -43BL, -47A, -55B, - 61A, -1, -2, -2UA…Effective Oct 30, 1989 AD 71-05-07High Speed Pinion Assembly · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 30 more…TPE331-25B","TPE331-25C","TPE331-25D","TPE331-25DA","TPE331-25DB","TPE331-25E","TPE331-25F","TPE331-25FA…Effective Apr 8, 1972 AD 84-10-06 R1Fuel Pump Assemblies · Honeywell International TPE331-1, TPE331-10, TPE331-10B and 45 more…TPE331-25B","TPE331-25C","TPE331-25D","TPE331-25DA","TPE331-25DB","TPE331-25E","TPE331-25F","TPE331-25FA…Effective Dec 26, 1984

In the text of ADs · 24

AD 2005-13-36(b) Affected ADs…A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), and…PDF page 2 AD 2005-23-06Request To Expand Applicability…As an example, the commenter mentions that Model 24, 24B, 24D, 24F, 25, 25B, 25C, and 25D airplanes modified by…PDF page 1 AD 2005-23-03(c) Applicability…A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, and 25F airplanes, certificated in any category; having serial numbers…PDF page 2 AD 2005-23-06(c) Applicability…24D, 24D-A, 24E, 24F, 25, 25A, 25B, 25C, 25D, and 25F airplanes; certificated in any category; modified by Supplemental…PDF page 3

Proposed ADs · 4

NPRM FAA-2005-20947Learjet…A, 24E, 24F, 25, 25A, 25B, 25C, 25D, and 25F Airplanes Modified by Supplemental Type Certificate…Published Apr 14, 2005 NPRM FAA-2005-20872Learjet…24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C…Published Apr 6, 2005 NPRM FAA-2005-22169Learjet…24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, and 25F AirplanesPublished Aug 23, 2005 NPRM FAA-2006-25563Learjet…24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C…Published Aug 16, 2006

Information bulletins · 4

SAIB NM-13-38Flight Controls Control Column Section…24F","24F-A","25","25A","25B","25C","25D","25F","28","29","31","31A","35","35A (C…Issued Jun 24, 2013 SAIB 2026-07MAIN LANDING GEAR ATTACH SECTION, Trunnion Pins…24F","24F-A","25","25A","25B","25C","25D","25F","28","29","31","31A","35","36","36A…Issued Mar 19, 2026 SAIB NM-16-24Fuselage: Main Plate/Skin["25","25A","25B","25C","25D","25F","28","29","31","31A","35","35A (C-21A)","36","36A…Issued Sep 15, 2016 SAIB NE-16-18Power Lever Loss of Power Control…TPE331-25AB","TPE331-25B","TPE331-25C","TPE331-25D","TPE331-25DA","TPE331-25DB","TPE331-25E","TPE331-25F…Issued Jul 11, 2016

Advisory circulars · 2

AC 65-25DHistoricalAviation Maintenance Technician Awards ProgramApproved Feb 7, 2007 AC 60-25DHistoricalReference Materials and Subject Matter Knowledge Codes for Airman Knowledge TestingApproved Jun 9, 2000

In the text of advisory circulars · 49

AC 36-1HNoise Levels for U.S. Certificated and Foreign Aircraft…94.0 99.3 100.8 2 13 LEARJET 25D 15.00 13.30 CJ610-6 2 2.95 0…Page 148 AC 36-1HNoise Levels for U.S. Certificated and Foreign Aircraft…24F 95.313.50 11.90 CJ610-6 40 25D/25F 15.00 13.30 CJ610-6/8A 40 95…Page 297 AC 36-1HNoise Levels for U.S. Certificated and Foreign Aircraft…0 1315.00 13.30 15.00 13.30LEARJET 25D CJ610-6 20 94.0 14 363.70 299.83AIRBUS…Page 250 AC 36-1HNoise Levels for U.S. Certificated and Foreign Aircraft…474.00 368.00 RB211-22B 42 102.8 25D 15.00 13.30 CJ610-6 40 102.7 14…Page 280

Supplemental type certificates · 202

STC SA368EAInstallation of AiResearch engine Model TPE 331-25D, TPE 331-25DA, TPE-25DB, or TPE 331-71 and Hartzell propeller Model HC-B3TN-5C/T10178C.Installation of AiResearch engine Model TPE 331-25D, TPE 331-25DA, TPE-25DB, or…PC6-AU23 Spares LLC STC SE50WEOne 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 .…Modification of a Model TPE331-25DAL to. incorporate the engine components associated with a…Garrett Turbine Engine Company Division of Garret Corporation STC SA4034WEInstallation of Canadian Marconi CMA-771 Omega/VLF navigation system.["Learjet 25D"]Learjet Inc STC ST00578DEReduce number of passenger seats installed from 8 to 4 passengers.["25D"]International Jet Aviation Services

In the text of STC certificates · 122

STC ST00432WIInstallation of Avcon fins(Aft Body Strakes).…for Learjet 25D/F Series, 35/36 Series Avcon Fin Installation Avcon Industries, Inc. 714 N. Oliver, Hangar…Avcon Industries Inc · ST00432WI_aml.pdf · Mar 30, 2009 STC SA1670SWInstallation of engine thrust reversers.…24, 24A, 24B, 24B-A, 24D, 24D-A, 24E, 24F, 25, 25A, 25B, 25C, 25D, 25F Date of…The NORDAM Group LLC · Certificate · Oct 24, 2003 STC ST01733WIInstallation of the Quiet Lear Hushkit or Avcon Noise Suppressor…24B, 24D, 24F, 25, 25B, 25C, 25D, 25F Description of Type Design Change: Installation of the Quiet Lear…Butler National Corporation · Certificate · Oct 22, 2013 STC SE33WEModification 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…TPE 331-25D, S/N P61801 Description of Type Design Change: Modification of : (1) Manual fuel valve and…Garrett Turbine Engine Company A Division of the Garrett Corporation · Certificate · Dec 9, 1981

Service difficulty reports · 282

SDR IKM2002F00001Wheel · Lear 25DWHEEL, CRACKED, BEAD SEAL AREA.Apr 5, 2002 · N347JV SDR 20000329SH039Warning Light · Lear 25DEN ROUTE, RIGHT ENGINE FIRE WARNING LIGHT ILLUMINATED BRIEFLY. DIVERTED FLIGHT. FALSE ENGINE FIRE WARNING, CHAFED WIRE. (X)Mar 2, 2000 · N969SS SDR 12196900WASwitch · Lear 25D…ALL WORK DONE IAW LEAR 25D MM. (X)Dec 2, 1996 · N900WA SDR 20010529CW009Control Box · Lear 25DRIGHT ENGINE FIRE LIGHT ON IN FLIGHT. TROUBLESHOOTING PER MM. ALL CIRCUITS TESTED GOOD. REPLACED FIRE DETECT CONTROL…May 10, 2001 · N800RF

NTSB investigations · 13

NTSB DCA79AA007Lear Jet 25D · Detroit, MI…4022 79/1/19 Detroit,MI Lear jet 25D cr- 2 0 0 noncommercial ATP,flight instr., age…Jan 19, 1979 · N137GL · 6 fatal NTSB FTW80DA104Beech 65-90 · Ruidoso, NM…Failure Remarks- r brake master cyl,goodrich pn 0-000010-8S,failed. Collided w lear jet 25D,N45DM.Aug 15, 1980 · N516WB · No injuries NTSB ERA17WA289Learjet 25 · Naiguata, VenezuelaOn August 19, 2017, about 0415 universal coordinated time, a Learjet 25D, Venezuelan registration YV3191, descended and impacted…Aug 19, 2017 · 5 fatal NTSB CHI03LA007Madewell EAA-Biplane-P · Forest Lake, MN…The Title 14 CFR Part 91 flight departed Forest Lake Airport (25D), Forest Lake, Minnesota, at 1705 on…Oct 9, 2002 · N21WL · No injuries

FAA accident and incident reports · 84

Incident 19790728012869ILear 25D · Teterboro, NJAircraft struck bird on final approach.Jul 28, 1979 · N220HS Incident 19810608054819ILear 25D · Newark, NJEngine failed due to faulty fuel controller.Jun 8, 1981 · N2426 Incident 19800815066619ILear 25D · Ft Worth, TXFlight diverted, engine shut down due to false fire warning.Aug 15, 1980 · N16GT Incident 19851124072299ILear 25D · Pittsfield, MAAdf malfunctioned, aircraft flew a considerable distance from final approach fix. Maintained VFR.Nov 24, 1985 · N744LC