# Lycoming ALF502L-2 - Type: Engine model (FAA registry) - Registry code: 41617 - Manufacturer (registry): LYCOMING - Model: ALF502L-2 - Engine type: Turbo-fan - Power: 7,500 lb thrust - Data sheet: [TCDS E6NE](https://openairdocs.org/tcds/E6NE) (OpenAirDocs) - Holder: CFS Aeroproducts Inc. - Installed in: 1 registered aircraft - Page: https://openairdocs.org/engine/lycoming-alf502l-2 Model codes come from the FAA registry's reference file. ## ADs that may apply (OpenAirDocs) Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 2020-18-09](https://openairdocs.org/ad/2020-18-09): Engine (Turbine/Turboprop); Engine Fuel and Control; Engine Emergency Shutdown System · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 9 more. Effective Oct 21, 2020 - [AD 2009-26-06](https://openairdocs.org/ad/2009-26-06): Fuel manifold assemblie · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 9 more. Effective Feb 11, 2010 - [AD 2009-08-07](https://openairdocs.org/ad/2009-08-07): High-pressure compressor (HPC) first stage discs · Honeywell International ALF502L-2 and ALF502L-2C. Effective May 18, 2009 - [AD 2006-09-13](https://openairdocs.org/ad/2006-09-13): Turbofan engines · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 7 more. Effective Jun 13, 2006 - [AD 2003-02-01](https://openairdocs.org/ad/2003-02-01): Drain tube assemblies · Honeywell International ALF502L-2, ALF502L-2C, ALF502R-3 and 1 more. Effective Jan 30, 2003 - [AD 2002-22-12](https://openairdocs.org/ad/2002-22-12): Titeflex hoses · BAE Systems ATP, Avro 146-RJ100A, Avro 146-RJ70A and 122 more. Effective Dec 13, 2002 - [AD 2002-12-08](https://openairdocs.org/ad/2002-12-08): Gas Producer Turbine (GPT) Components · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 9 more. Effective Jul 17, 2002 - [AD 2000-05-14](https://openairdocs.org/ad/2000-05-14): Bearing Inlet Assembly · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 9 more. Effective Apr 27, 2000 - [AD 96-04-02](https://openairdocs.org/ad/96-04-02): Compressor and Turbine Disks · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 2 more. Effective Apr 29, 1996 - [AD 93-14-13](https://openairdocs.org/ad/93-14-13): Third Stage Turbine Disk · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 7 more. Effective Oct 4, 1993 - [AD 93-10-07](https://openairdocs.org/ad/93-10-07): Third Stage Compressor Disks · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 7 more. Effective Aug 10, 1993 - [AD 91-14-05](https://openairdocs.org/ad/91-14-05): High Compressor Rotor Disks · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 2 more. Effective Jul 15, 1991 - [AD 87-15-03](https://openairdocs.org/ad/87-15-03): Gas Producer Turbine Spacer · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 7 more. Effective Jul 24, 1987 - [AD 86-07-13](https://openairdocs.org/ad/86-07-13): Fourth Stage Compressor Vane Assemblies · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 2 more. Effective Apr 11, 1986 - [AD 82-25-10](https://openairdocs.org/ad/82-25-10): First Stage Compressor Stator Vane Airfoils and/or Fourth Stage Turbine Blade Airfoils · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 4 more. Effective Dec 16, 1982 - [AD T83-03-51](https://openairdocs.org/ad/T83-03-51): Fourth Stage Turbine Rotors Assembly · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 7 more Historical (superseded or no longer in force): - [AD 97-05-11 R1](https://openairdocs.org/ad/97-05-11-R1) (historical): ALF502L, ALF502L-2, ALF502L-2A and 9 more. Effective Aug 18, 1997 - [AD 97-11-05](https://openairdocs.org/ad/97-11-05) (historical): Fuel Manifold Assemblies · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 9 more. Effective Jul 28, 1997 - [AD 95-04-11](https://openairdocs.org/ad/95-04-11) (historical): Third Stage Turbine Disks · Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 7 more. Effective Apr 3, 1995 - [AD 80-22-53](https://openairdocs.org/ad/80-22-53) (historical): Honeywell International ALF502L, ALF502L-2, ALF502L-2A and 1 more. Effective Dec 31, 1980 ## Registered aircraft (1) - [N604CG](https://openairdocs.org/aircraft/N604CG): [Coulson Aviation (USA) Inc](https://openairdocs.org/faa-owner/COULSON%20AVIATION%20(USA)%20INC), [Portland, OR](https://openairdocs.org/faa-place/OR/Portland), built 1982, S/N 1048 ## NTSB investigations None matched to aircraft with this engine model. ## FAA accident and incident reports None matched to aircraft with this engine model. ## Service difficulty reports (14) As reported by operators and repair stations, by the model named in the report. - [SDR A8JA0007](https://openairdocs.org/sdr/A8JA0007), Aug 1, 2010: FIRE LOOP. LOOSE. DURING CLIMBOUT, PILOTS NOTED A FIRE BELL AND NR2 ENGINE FIRE WARNING LIGHT FOR A ONE SECOND DURATION. ACFT WAS APPROX 2500-3000 FT. CREW DECLARED AN EMERGENCY, - [SDR CA041029002](https://openairdocs.org/sdr/CA041029002), Oct 18, 2004: BEARING. FAILED. (CAN) DURING 600 HRS INSPECTION OF NR 1 ENGINE AME NOTICED THAT THE LT THRUST REVERSER STRUT LOWER ATTACHEMENT WAS CHAFING AGAINST BRACE UPPER, AFTER CARRYING O - [SDR CA020517008](https://openairdocs.org/sdr/CA020517008), Apr 4, 2002: CROSSBEAM. CRACKED. (CAN) DURING INTERNAL STRUCTURAL INSPECTION OF THE TAIL AREA, A 5/8 INCH CRACK WAS FOUND ON THE RUDDER CONTROL CROSS BEAM SUPPORT (EMPENNAGE).THE PROBABLE CAUSE - [SDR 20001024AP004](https://openairdocs.org/sdr/20001024AP004), Jul 5, 2000: ENGINE. VIBRATION. FXE-MDSD - TAKEOFF FROM MDSD NORMAL, AFTER APPROX 2.2 HOURS, AT CRUISE ALTITUDE, SEVERE VIBRATIONS FROM NR 2 ENGINE NECESSITATED ITS SHUTDOWN. FLIGHT DIVERTED T - [SDR CA000724012](https://openairdocs.org/sdr/CA000724012), Jul 5, 2000: ENGINE. FAILED. (CAN) DURING CRUISE AT 41,000 FT THE FLIGHT CREW NOTICED A SMALL SURGE IN POWER ON THE RT ENGINE FOLLOWED ABOUT 10 SECONDS LATER BY A DECREASE IN RPM AND INCREA - [SDR CA000306004](https://openairdocs.org/sdr/CA000306004), Mar 1, 2000: ACTUATOR. FAILED. (CAN) NR 2 TMS ACTUATOR WHITE LIGHT ON IN FLIGHT AND ENGINE WOULD NOT SHUT DOWN NORMALLY. SHUT DOWN ACCOMPLISHED BY OVERSPEED TEST. REPLACED NR 2 TMS ACTUATOR A - [SDR CA991209092](https://openairdocs.org/sdr/CA991209092), Dec 4, 1999: CONNECTOR. WORN. (CAN) ON CLIMB-OUT, NR 1 ENGINE FIRE FAULT FLICKERING. A/C LEVELED AND NR 1 ENGINE FIRE FAULT ON STEADY. ON APPROACH, FIRE BELL AND FIRE WARNING CAME ON. ENGINE - [SDR CA991103053](https://openairdocs.org/sdr/CA991103053), Oct 27, 1999: SOCKET. FAILED. (CAN) CONDENSATION ACCUMULATING ON TOP OF FLUORESCENT LIGHT FIXTURE CAUSING SHORT CIRCUIT POSSIBLY LEADING TO SHOCK/FIRE. CONDENSATION OCCURS FROM THE USE OF VA - [SDR 99ZZZX3566](https://openairdocs.org/sdr/99ZZZX3566), Aug 30, 1999: DUCT. CHAFED. DURING SCHEDULED INSPECTION, THE BLEED AIR DUCT, PN 215-0809-501, WAS FOUND CHAFING ON NR 2 BEARING OIL TUBE, PN 2-263-060-01. BOTH PARTS WERE CHAFED BEYOND LIM - [SDR 98ZZZX3215](https://openairdocs.org/sdr/98ZZZX3215), Mar 29, 1998: SPACER. MISINSTALLED. HPN - NORMAL TAKEOFF EN ROUTE BAHAMAS. APPROX 1 HR EN ROUTE AT FL 310, PILOT NOTED NR 1 ENG VIBRATION INCREASE FROM .3 M/S TO .6 M/S AND INCREASE IN ENG NOISE. - [SDR CA960507010](https://openairdocs.org/sdr/CA960507010), Apr 9, 1996: PUMP. LEAKING. (CAN)OIL FOUND IN COWLING AND ON GROUND . OIL PUMP HAD A PINHOLE IN THE CASING, VERIFIED BY EDDY CURRENT INSPECTION - [SDR 96ZZZX1690](https://openairdocs.org/sdr/96ZZZX1690), Mar 17, 1996: OIL TUBE. CHAFED. FIRE WARNING INDICATION ON RT ENGINE AND REPORTED THROTTLE POWER LESSENED WHILE AT CRUISE. RESTARTED, THROTTLE WARNING WENT OUT. UNSCHEDULED LANDING AT ICT. ENG - [SDR 95ZZZX3630](https://openairdocs.org/sdr/95ZZZX3630), Jun 7, 1995: LOCK PIN. FAILED. OIL ANALYSIS, FINDING AN INCREASE IN METAL CONTAMINATION, INVESTIGATION REVEALED THE ACCESSORY DRIVE GEARBOX DRIVESHAFT LOCK ASSY POST SB ALF502L 72-0175, HAD D - [SDR 95ZZZX1021](https://openairdocs.org/sdr/95ZZZX1021), Feb 13, 1995: FUEL CONTROL. FAILED. ENGINE FLAME-OUT AT FL370, ENGINE FAILED TO RESTART ON SUBSEQUENT ATTEMPTS. AIRCRAFT MADE A SAFE LANDING AT GULPORT, MS. INVESTIGATION REVEALED INTERNAL FAILURE --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.