# JASC 2613: Overheat Detection

- Type: JASC system/component code (FAA)
- ATA chapter: 26 Fire Protection
- Title in the code table: OVERHEAT DETECTION
- Service difficulty reports: 1,796
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=24
- Page: https://openairdocs.org/jasc/2613

## What it covers

The system used to sense and indicate the presence of an overheat condition in all protected areas of the aircraft. Reporting the specific location of a defective part is essential. Typical parts are detector, sensor, wiring, relay, amplifier, test circuit, etc.

## Service difficulty reports (1,796, newest 50)

- [SDR AALA202610100389](https://openairdocs.org/sdr/AALA202610100389), Oct 7, 2026: Airbus A321231. SENSING ELEMENT. DEFECTIVE. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO DFW DUE TO THE FLIGHT CREW REPORTING THAT  (N970UY)
- [SDR CALA2026092119567](https://openairdocs.org/sdr/CALA2026092119567), Sep 19, 2026: Boeing 737924ER. CONTROL MODULE. DAMAGED. LEFT WING BODY OVHT LIGHT AFTER TAKE OFF, LIGHT REMAINED ON AFTER CHECKLI ST IAW FIM 26-18 TASK 801 PERFORMED BITE OF WH (N37422)
- [SDR SWAA2026091866830](https://openairdocs.org/sdr/SWAA2026091866830), Sep 14, 2026: Boeing 7377H4. SENSING ELEMENT. FAULTED. LEFT WING-BODY OVERHEAT ILLUMINATED, R & R LEFT PYLON FWD SENSING ELEMENT IAW AMM 26-18-02 OPS CHECK GOOD (N937WN)
- [SDR ABXA20260912402](https://openairdocs.org/sdr/ABXA20260912402), Sep 12, 2026: Boeing 767338. OVERHEAT SYS. FALSE ACTIVATION. FIRE/OVHT SYS ON FINAL APPROACH. AC LANDED AND MTX GROUNDED A/C. PERFORMED OPERATIONAL CHECK I.A.W A.M.M B767 26-11-00.  (N317CM)
- [SDR SWAA2026090918056](https://openairdocs.org/sdr/SWAA2026090918056), Sep 9, 2026: Boeing 7378H4. OVERHEAT SENSOR. FALSE ACTIVATION. NR 1 ENGINE OVERHEAT LIGHT CAME ON, STARTED QRH & THEN WENT OUT. PERFORMED FIM 26-10 TASK 811. NO DEFECTS FOUND AT THIS  (N8630B)
- [SDR AALA202609061485](https://openairdocs.org/sdr/AALA202609061485), Sep 3, 2026: Airbus A321231. SENSING ELEMENT. FAULTED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO RDU DUE TO THE FLIGHT CREW REPORTING AN AI (N914UY)
- [SDR SWAA2026082716808](https://openairdocs.org/sdr/SWAA2026082716808), Aug 23, 2026: Boeing 7377K9. OVERHEAT LOOP. FAULTED. LEFT WTB OVERHEAT LIGHT ILLUMINATED ON TAXI OUT WITH LEFT PACK RUNNING ON APU BLEED SOURCE. PERFORMED QRH, LIGHT EXTINGU (N7878A)
- [SDR SWAA2026081961064](https://openairdocs.org/sdr/SWAA2026081961064), Aug 15, 2026: Boeing 7378. CONTROL UNIT. INTERMITTENT. RIGHT WING TO BODY OVERHEAT INOPERATIVE & ALL DETECTOR UNITS FAILING ON THE RT SIDE. OVERHEAT DETECTION CONTROL UNIT SHO (N8845L)
- [SDR K11A2026081300384](https://openairdocs.org/sdr/K11A2026081300384), Aug 13, 2026: Boeing 73745D. ELEC CONNECTOR. INTERMITTENT. RIGHT WING BODY OVERHEAT ILLUMINATED WHILE CLIMBING THROUGH FL185 AND REMAINED ON EVEN WITH BLEED AIR OFF. LEFT WING BOD (N406CK)
- [SDR IPXA2026080420489](https://openairdocs.org/sdr/IPXA2026080420489), Aug 4, 2026: Airbus A300F4622R. CONTROLLER. UNSERVICEABLE. AIR TURN BACK, ENG 1 BLEED LEAK RESULTING IN AIR TURN BACK FOUND LT WING MFA ILLUMINATED ON MX PANEL. INSPECTED WING PNE (N160UP)
- [SDR SWAA2026082106267](https://openairdocs.org/sdr/SWAA2026082106267), Aug 1, 2026: Boeing 7378H4. OVERHEAT LOOP. FALSE INDICATION. LEFT WING BODY OVERHEAT LIGHT ILLUMINATED AFTER NR 2 ENGINE START, WITH APU BLEED SWITCH ON. BITE SHOWS CODE 44 WITH ALA (N8643A)
- [SDR SWAA2026080451397](https://openairdocs.org/sdr/SWAA2026080451397), Jul 31, 2026: Boeing 7378. OVERHEAT LOOP. FALSE ACTIVATION. ENGINE FIRE/OVERHEAT DETECTOR FAULT LIGHT ILLUMINATED.INTERMITTENTLY ACCOMPLISHED OPS CHECK OF ENGINE FIRE/OVERHEAT DETE (N8973S)
- [SDR ABXA20260730340](https://openairdocs.org/sdr/ABXA20260730340), Jul 30, 2026: Boeing 767281. WARNING MESSAGE. FALSE ACTIVATION. STATUS MSG "L ENG OH LP2 "KEEPS COMING ON AND OFF DURING THE FLIGHT. PER MCC REQUEST, PERFORMED LEAK CHECK AT L ENG PYLO (N767AX)
- [SDR SWAA2026073145069](https://openairdocs.org/sdr/SWAA2026073145069), Jul 27, 2026: Boeing 7377H4. OVERHEAT SYS. ILLUMINATED. ENG 2 OVERHEAT LIGHT ILLUMINATED ON START, R & R NR 2 ENGINE CORE RT & LT FIRE DETECTOR IAW MM 26-11-01. R & R NR 2 ENGI (N940WN)
- [SDR SCNA20260723323](https://openairdocs.org/sdr/SCNA20260723323), Jul 22, 2026: Boeing 737800*. BOTTLE. ILLUMINATED. AFTER START ENG 1 OVERHEAT LIGHT ILLUMINATED RAN QRH AND DID ESP ON GROUND. QRH THEN DICTATED TO DISCHARGE A BOTTLE. AFT (N852SY)
- [SDR ABXA20260721329](https://openairdocs.org/sdr/ABXA20260721329), Jul 21, 2026: Boeing 767281. OVERHEAT LOOP. WARNING MESSAGE. DURING TAKEOFF, STATUS MSG: L ENG OH LP 2. DEFERRED IAW MEL 26-11-2-1 MX PROCEDURES COMPLIED WITH MBCB 7/31/26 PLACARD I (N767AX)
- [SDR K11A2026071600383](https://openairdocs.org/sdr/K11A2026071600383), Jul 16, 2026: Boeing 73745D. OVERHEAT SENSOR. DIRTY. WHEEL WELL FIRE LIGHT IN FLIGHT. CLEANED WHEEL WELL OVERHEAT DETECTOR ELEMENT IAW AMM 26-17-11. PERFORMED OPERATIONAL CH (N406CK)
- [SDR CALA2026070617559](https://openairdocs.org/sdr/CALA2026070617559), Jul 2, 2026: Airbus A321271NX. SENSOR. FAULTED. BRAKE 3 TEMP SENSOR ROSE TO 995C AND CAUSED HOT BRK ECAM IN FLT BRIEFED INBOUD CREW, STATED 5 MILES OUT NR 3 BRAKE TEMP  (N24510)
- [SDR N6WA2026070207](https://openairdocs.org/sdr/N6WA2026070207), Jun 30, 2026: Cndair CL6002C11. OVERHEAT LOOP. FAULTED. L BLEED DUCT WARNING MSG. R & R CERAMIC INSERT AT LOOP MT202 IAW AMM 36-21-00. (N542GJ)
- [SDR SCNA20260702375](https://openairdocs.org/sdr/SCNA20260702375), Jun 30, 2026: Boeing 73786N. OVERHEAT LOOP. FAULTED. NR 1 OVHT DET LOOP B INOPERATIVE. ON TEST ENG 1 OVERHEAT LIGHT DOES NOT ILLUMINATE AND FAULT LIGHT ILLUMINATED. ENGINE O (N5227)
- [SDR ABXA20260624282](https://openairdocs.org/sdr/ABXA20260624282), Jun 24, 2026: Boeing 767281. OVERHEAT LOOP. FAULTED. L ENG OH-LP 2 MESSAGE. PERFORMED T/S IAW B767 FIM 26-11 F/T 804 AND AMM 26-10-01. SWAPPED CARDS M688 AND M690. FAULT DID (N767AX)
- [SDR CALA2026062617367](https://openairdocs.org/sdr/CALA2026062617367), Jun 23, 2026: Boeing 737824. OVERHEAT LOOP. FAULTED. DIVERSION TO GJT. RT WING BODY OVERHEAT. PERFORMED INSPECTION IN RT WING LE AREA & RT PACK BAY. NO BLEED LEAKS NOTED. DE (N86534)
- [SDR SCNA20260522213](https://openairdocs.org/sdr/SCNA20260522213), May 22, 2026: Boeing 737900ER. OVERHEAT SYS. ACTIVATED. DURING CLIMBOUT RIGHT SIDE WING BODY OVERHEAT LIGHT ILLUMINATED. RAN QRH & NOTIFIED MX CONTROL JB 7665. MX US RETURN TO  (N903SY)
- [SDR REXA2026041300284](https://openairdocs.org/sdr/REXA2026041300284), Apr 2, 2026: Cndair CL6002D24. OVERHEAT SENSOR. INOPERATIVE. AT FL250 MLG BAY OVHT WARN RAN QRH WARN MSG DID NOT EXTINGUISH BTMS ALL 0000 LANDED W/O ISSUE WARN MSG PERSISTS AT GATE. (N303PQ)
- [SDR IPXA2026040311723](https://openairdocs.org/sdr/IPXA2026040311723), Apr 2, 2026: Boeing 75724APF. OVERHEAT SYS. FALSE ACTIVATION. EMERGENCY DECLARED, EQUIP OVRHT MSG @ FL 390. DID QRH CHECKLIST YET MSG REMAINED. WENT AWAY @ 1200" AGL. ALSO REF 21-58- (N466UP)
- [SDR AALA202604029753](https://openairdocs.org/sdr/AALA202604029753), Apr 1, 2026: Boeing 737823. OVERHEAT LOOP. FAULTED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: RIGHT WING BODY OVERHEAT LIGHT ILLUMINATED AFTER TAKEOFF. AIRCR (N840NN)
- [SDR AALA202603257925](https://openairdocs.org/sdr/AALA202603257925), Mar 18, 2026: Boeing 737823. OVERHEAT LOOP. FAULTY. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: WING BODY OVERHEAT LIGHT ILLUMINATED IN FLIGHT. AIRCRAFT AI (N971NN)
- [SDR AALA202603197925](https://openairdocs.org/sdr/AALA202603197925), Mar 18, 2026: Boeing 737823. LIGHT. ILLUMINATED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: WING BODY OVERHEAT LIGHT ILLUMINATED IN FLIGHT. AIRCRAFT AI (N971NN)
- [SDR CALA2026022013934](https://openairdocs.org/sdr/CALA2026022013934), Feb 19, 2026: Boeing 737924ER. OVERHEAT LOOP. FAULTED. RT WING-BODY OVERHEAT DURING CLIMB & CRUISE. PERFORMED CHECKLIST, NO HELP. DIVERTED BACK. PER FLIGHT CREW: RT WING - BOD (N67845)
- [SDR IPXA2026021866915](https://openairdocs.org/sdr/IPXA2026021866915), Feb 18, 2026: Boeing 75724APF. WARNING MESSAGE. ILLUMINATED. DIVERSION, EMERGENCY DECLARED, RT ENG OVHT AT CRUISE 4512 MSG WENT OUT AFTER 2 MIN AND ENGINE AT IDLE THRUST. ALL ENGINE (N455UP)
- [SDR CALA2026020513601](https://openairdocs.org/sdr/CALA2026020513601), Feb 3, 2026: Boeing 737824. SENSOR. FAULTED. DUCT PX SPLIT ON DPT LEFT 10PSI RIGHT 40PSI REMOVED AND REPLACED PRECOOLER CONTROL VALVE REF AMM 36-12-03, AND 450 SENSO (N14214)
- [SDR LR7A2026020103801](https://openairdocs.org/sdr/LR7A2026020103801), Feb 1, 2026: Lkheed 382G. OVERHEAT SENSOR. ILLUMINATED. MOMENTARY ILLUMINATION OF MASTER FIRE WARNING LIGHT, NO TEE HANDLE LIGHT INDICATION. REMOVED AND REPLACED THE NR 2 TURBI (N410LC)
- [SDR DALA2026012200476](https://openairdocs.org/sdr/DALA2026012200476), Jan 20, 2026: Boeing 737832. OVERHEAT SENSOR. FAULTED. RETURNED TO ATL DUE TO RT WING BODY OVERHEAT. REPLACED M371 AND M1763 OVERHEAT ELEMENTS AND OVERHEAT DETECTION MODULE. C (N3769L)
- [SDR SWIA2026012000013](https://openairdocs.org/sdr/SWIA2026012000013), Jan 13, 2026: Cndair CL6002C10. OVERHEAT LOOP. FAULTED. ANTI ICE DUCT WARNING ON CLIMB OUT OF DEN. QHR CLEARED THE MSG AND WE DIDN€™T NEED TO USE THE ANTI ICE AFTER THAT. (FLI (N794SK)
- [SDR AALA202512269331](https://openairdocs.org/sdr/AALA202512269331), Dec 23, 2025: Boeing 737823. SENSING ELEMENT. FAULTED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO MIA DUE TO THE FLIGHT CREW REPORTING A RIG (N939NN)
- [SDR AALA202512264340](https://openairdocs.org/sdr/AALA202512264340), Dec 23, 2025: Boeing 737823. SENSING ELEMENT. FAULTED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO MIA DUE TO THE FLIGHT CREW REPORTING A RIG (N939NN)
- [SDR AALA202512261255](https://openairdocs.org/sdr/AALA202512261255), Dec 23, 2025: Boeing 737823. SENSING ELEMENT. FAULTED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO MIA DUE TO THE FLIGHT CREW REPORTING A RIG (N939NN)
- [SDR ABXA20251212330](https://openairdocs.org/sdr/ABXA20251212330), Dec 12, 2025: Boeing 76736N. OVERHEAT LOOP. FALSE INDICATION. INTERMITENT MN CARGO LP 1 AND 2 STATUS MESSAGE W/FIRE WARNING.MTX GROUNDED A/C AND PERFORM MAIN CARGO/ENG/APU/FIRE/OVHT  (N1013A)
- [SDR N6WA2025110401](https://openairdocs.org/sdr/N6WA2025110401), Nov 1, 2025: Cndair CL6002C11. OVERHEAT LOOP. OUT OF POSITION. ANTI ICE DUCT WARNING MSG. INSPECTED AND FOUND LOOP MT173 TOUCHING PICCOLO TUBE. REPOSITIONED LOOP IAW CRJ AMM 36-21-15. (N538GJ)
- [SDR 6CBA2025101625001](https://openairdocs.org/sdr/6CBA2025101625001), Oct 16, 2025: Pilats PC1247E. OVERHEAT SENSOR. FAULTED. DURING A ROUTINE REPOSITIONING FLIGHT FROM KCHS TO KBCT, THE CREW REPORTED A "BATTERY 1 HOT CAS" MESSAGE. THE CREW DECLA (N923AF)
- [SDR AALA202510010010](https://openairdocs.org/sdr/AALA202510010010), Sep 29, 2025: Boeing 737823. OVERHEAT SYS. NO TEST. AIRCRAFT IN BASE MAINTENANCE: WHEEL WELL FIRE OVERHEAT DETECTION BOX FAILED. CLEARED FAULT AND RESET DETECTION MODULE, P (N355PU)
- [SDR I5PA2025090519301](https://openairdocs.org/sdr/I5PA2025090519301), Sep 5, 2025: Boeing 757223. SWITCH. FAULTY. RIGHT TURB OVHR DET 1 STATUS MSG. R & R RT ENG OVHT DET 1 SWITCH PER AMM, OPS CHECK NORMAL. (N193AN)
- [SDR CALA2025081907936](https://openairdocs.org/sdr/CALA2025081907936), Aug 17, 2025: Boeing 75733N. PCB. FAULTED. R OVHT DET STATUS MSG FOLLOWED BY R ENG OVHT CAUTION. COMPLIED W ITH QRH. WENT AWAY WITH IDLE DEBRIEFED FLIGHT CREW, ADV (N57862)
- [SDR SWIA2025081800015](https://openairdocs.org/sdr/SWIA2025081800015), Aug 15, 2025: Cndair CL6002C10. WARNING MESSAGE. ILLUMINATED. D:AFTER TAKE OFF RECEIVED GEAR OVHT FOLLOWED BY BRAKE OVHT. BOTH EXTINGUISHED AND RE ILLUMINATED. (BELIEVE TO BE ERRONEO (N797SK)
- [SDR SWAA2025081299948](https://openairdocs.org/sdr/SWAA2025081299948), Aug 8, 2025: Boeing 737752. CONTROL UNIT. FAULTED. LEFT WING TO BODY OVERHEAT LIGHT ILLUMINATED TWICE ON TAXI OUT. R & R COMPARTMENT OVERHEAT DETECTION CONTROL UNIT IN REF (N7887A)
- [SDR SWAA2025080697783](https://openairdocs.org/sdr/SWAA2025080697783), Aug 2, 2025: Boeing 7378H4. OVERHEAT SENSOR. FAULTED. RIGHT WING-BODY OVERHEAT LIGHT ILLUMINATED AT 2 HOURS INTO FLIGHT. LIGHT NEVER EXTINGUISHED EVEN AFTER QRH AND ENGINE SH (N8569Z)
- [SDR SWIA202507030624](https://openairdocs.org/sdr/SWIA202507030624), Jun 24, 2025: Cndair CL6002B19. WARNING MESSAGE. FALSE ACTIVATION. IN SLN, GOT ANTI-ICE DUCT WARNING, RAN QRH. DIVERTED TO SLN TO AVOID CLOUDS (FLIGHT 5824 - FILED CLOSED)AFTER BRIEF INVE (N975SW)
- [SDR SWIA202506160011](https://openairdocs.org/sdr/SWIA202506160011), Jun 11, 2025: Cndair CL6002B19. DETECTOR. FAULTED. L SIDE FUSELAGE ANTI ICE DUCT WARNING MESSAGE IN ICING WITH WINGS/COWLS SELECTED ON. ACCOMPLISHED QRH WHICH REMOVED MESS (N876AS)
- [SDR VNAA2025052311101](https://openairdocs.org/sdr/VNAA2025052311101), May 19, 2025: Cndair CL6002C10. OVERHEAT LOOP. FAULTED. L BLEED DUCT WARNING MSG ON CLIMB, FL260. / REMOVED AND REPLACED LOOP MT141 IAW CRJ 700 AMM 36-21-01-000/400-806-A04. OP (N527EA)
- [SDR U5QA2025052340152](https://openairdocs.org/sdr/U5QA2025052340152), May 14, 2025: Bombdr BD1001A10. DETECTOR. FAULTED. RED PACK LEAK CAS B3-007406 LEAK DETECTED IN DUCT RUNNING FROM THE LEFT FLOW CONTROL VALVE TO THE PACK INLET AND PRECOOL (N356VJ)

All 1,796: https://openairdocs.org/jasc/2613/reports.md

## Other codes in chapter 26

- [JASC 2600](https://openairdocs.org/jasc/2600): Fire Protection System (300 reports)
- [JASC 2610](https://openairdocs.org/jasc/2610): Detection System (709 reports)
- [JASC 2611](https://openairdocs.org/jasc/2611): Smoke Detection (7,428 reports)
- [JASC 2612](https://openairdocs.org/jasc/2612): Fire Detection (7,458 reports)
- [JASC 2620](https://openairdocs.org/jasc/2620): Extinguishing System (702 reports)
- [JASC 2621](https://openairdocs.org/jasc/2621): Fire Bottle, Fixed (623 reports)
- [JASC 2622](https://openairdocs.org/jasc/2622): Fire Bottle, Portable (354 reports)
- [JASC 2697](https://openairdocs.org/jasc/2697): Fire Protection System Wiring (1,399 reports)

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