# JASC 2450: AC Power Distribution System

- Type: JASC system/component code (FAA)
- ATA chapter: 24 Electrical Power
- Title in the code table: AC POWER DISTRIBUTION SYSTEM
- Service difficulty reports: 872
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=21
- Page: https://openairdocs.org/jasc/2450

## What it covers

The electrical system providing for connection of AC power to using systems. Does not include the using system. Typical parts are main and secondary system buss, circuit breaker, limiter, jumper, load meter switch, etc.

## Service difficulty reports (872, newest 50)

- [SDR DALA2026092105261](https://openairdocs.org/sdr/DALA2026092105261), Sep 20, 2026: Airbus A330941. ROLLER. WORN. LEFT WING OUTBOARD FLAP GUIDE ROLLER WAS LOOSE. REPLACED ROLLER ASSY IAW AMM 27-54-73. (1823240) AIRCRAFT WAS GROUNDED. (N415DX)
- [SDR DALA2026090204960](https://openairdocs.org/sdr/DALA2026090204960), Sep 1, 2026: Airbus A321271NX. CONTACTOR. FAULTED. ELEC AC BUSS 1 FAULT ECAM, AFTER ENGINE SHUTDOWN AT GATE. ELECTRICAL ODOR AT THE SAME IN COCKPIT & FWD GALLEY. ODOR WENT (N533DT)
- [SDR DALA2026090104933](https://openairdocs.org/sdr/DALA2026090104933), Aug 30, 2026: Airbus BD5001A10. CONTROL UNIT. FAULTY. DECLARED EMERGENCY DUE TO 24 ELECTRICAL FAULT - BPCU INOP WITH ASSOCIATED FLAP AND SLAT REDUNDANT LOSS AT CRUISE. REPLAC (N101DU)
- [SDR DALA2026090204942](https://openairdocs.org/sdr/DALA2026090204942), Aug 29, 2026: Airbus A319114. TRU. ODOR. SHIP 3147 DISC: FLT CREW REPORTED ELECTRICAL ODOR AND A/C BUSS 2 FAULT ON THE ECAM. T/S & FOUND TR2 INOP & RT GEN GLC 2  (N347NB)
- [SDR YENA2026083100714](https://openairdocs.org/sdr/YENA2026083100714), Aug 27, 2026: Airbus A320232. CONTACTOR. FAULTED. FLT 552, MCO-MCO. ELEC AC ESS FEED FAULT AT APPROX 60 KTS DURING TO. FLICKERED AND THEN LOST SCREENS 1, 2, 3 AT APPROX 7 (N827JB)
- [SDR 9WGA2026052134401](https://openairdocs.org/sdr/9WGA2026052134401), May 21, 2026: Boeing 747446. BUSS PROTECTION. FAULTY. AFTER TAKE-OFF FROM NRT, INDICATION, AC BUS 1 FAIL, RETURNED TO NRT, MAINTENANCE PERFORMED PER FIM 24-23 TASK 812, REMOV (N344KD)
- [SDR DALA2026050202782](https://openairdocs.org/sdr/DALA2026050202782), Apr 27, 2026: Airbus A321213. POWER SUPPLY. ODOR. DIV - TO MKE DUE TO A REPORTED BURNT POPCORN SMELL AT ROWS 20 - 25. SMELL DISSIPATED ONCE IFE WAS TURNED OFF. IFE SYSTEM (N359DN)
- [SDR 2026F00061](https://openairdocs.org/sdr/2026F00061), Mar 27, 2026: Frchld SA227DC. CURRENT LIMITER. FAULTED. R & R CURRENT LIMITER OPS CHECK GOOD IAW 24-30-25 RTS CHECKS COMPLETE
- [SDR DALA2026031201732](https://openairdocs.org/sdr/DALA2026031201732), Mar 12, 2026: Boeing 737932ER. SEAT. ODOR. (LOG 8243318) BEFORE LANDING FAS CALLED ABOUT HOT ELECTRICAL ODOR NO SMOKE PRESENT. CAPT SELECTED CAB / UTIL AND IFE / P (N857DZ)
- [SDR CALA2026012613241](https://openairdocs.org/sdr/CALA2026012613241), Jan 26, 2026: Boeing 767424ER. MODULE. FAULTED. ON TAKEOFF HIGH SPEED AND LOW SPEED STALL SPEED TAPES OVERLAPPED ON FO SIDE W LOW AS EICAS. FO SIDE BITE YSM LRU PER FIM (N66056)
- [SDR DALA2025102107696](https://openairdocs.org/sdr/DALA2025102107696), Oct 20, 2025: Boeing 757232. OUTLET. INOPERATIVE. ACRID ELECTRICAL SMELL IN AFT CABIN ROW 25/ 26. INSPECTED ITEMS IN STEPS 1-5. PED POWER OUTLET IS INOPERATIVE AT SEAT 26 (N699DL)
- [SDR CALA2025081207633](https://openairdocs.org/sdr/CALA2025081207633), Aug 10, 2025: Boeing 7878. CONTROL UNIT. FAULTED. ELEC P200 PANEL THE PRIMARY POWER DISTRIBUTION SYSTEM (PPDS) P200 PANEL IS FAULT ED SUCH THAT IT CANNOT SUPPORT AIRPLANE (N27903)
- [SDR AALA202508061200](https://openairdocs.org/sdr/AALA202508061200), Jul 30, 2025: Airbus A319112. OUTLET. ODOR. AIRCRAFT WAS NOT GROUNDED: POWER PORTS AT ROWS 16 AND 17 DEACTIVATED DUE TO ELECTRICAL BURNING ODOR REF MIC 1396210. MAI (N713UW)
- [SDR AALA202508065565](https://openairdocs.org/sdr/AALA202508065565), Jul 30, 2025: Airbus A319112. POWER PORT. ODOR. AIRCRAFT WAS NOT GROUNDED: POWER PORTS AT ROWS 16 AND 17 DEACTIVATED DUE TO ELECTRICAL BURNING ODOR REF MIC 1396210. **S (N713UW)
- [SDR AALA202508025565](https://openairdocs.org/sdr/AALA202508025565), Jul 30, 2025: Airbus A319112. POWER PORT. ODOR. AIRCRAFT WAS NOT GROUNDED: POWER PORTS AT ROWS 16 AND 17 DEACTIVATED DUE TO ELECTRICAL BURNING ODOR REF MIC 1396210. (OP (N713UW)
- [SDR AALA202507256183](https://openairdocs.org/sdr/AALA202507256183), Jul 13, 2025: Boeing 737823. OUTLET. SPARKS. AIRCRAFT WAS NOT GROUNDED: FLIGHT ATTANDENT REPORTS REAR ELECTRICAL OUTLET SPARKS WHEN PLUGGING IN ADAPTER TO CHARGE HER (N965NN)
- [SDR AALA202507162016](https://openairdocs.org/sdr/AALA202507162016), Jul 11, 2025: Boeing 7378. OUTLET. INOPERATIVE. AIRCRAFT WAS GROUNDED: ELECTRICAL PLASTIC BURNT SMELL COMING FROM OVERHEAD AROUND SEATS 8-9ABC. FOUND INSEAT POWER SUPPL (N302SS)
- [SDR DALA2025062404731](https://openairdocs.org/sdr/DALA2025062404731), Jun 23, 2025: Airbus A321213. CHARGER. FIRE. AIRCRAFT 3040, SEAT 4C POWER CHARGER: SMOKE AND FLAME OUT OF CHARGER WHEN REMOVING POWER CHORD. CORRECTIVE ACTION: REPLA (N340DN)
- [SDR DALA2025051203645](https://openairdocs.org/sdr/DALA2025051203645), May 11, 2025: Airbus A320212. BUSS. ABNORMAL. SHIP 3252 DISC: WHILE CLOSING CIRCUIT BREAKERS FOR BREAK SELECTOR VALVE REPLACEMENT, AC 2 BUS DROPPED OFF-LINE. ATTEMPTE (N352NW)
- [SDR SWIA202504240009](https://openairdocs.org/sdr/SWIA202504240009), Apr 9, 2025: Cndair CL6002C10. BUSS. FAILED. AC BUS 1 FAIL ACCOMPANIED BY GEN 1 OFFLINE AND AC ESSENTIAL BUS FAIL AFTER TAKEOFF, RAN QRH, RETURN TO FIELD (FLIGHT 653 (N744SK)
- [SDR DALA2025030201591](https://openairdocs.org/sdr/DALA2025030201591), Feb 27, 2025: Airbus BD5001A10. OUTLET. FAILED. AIRCRAFT 8104, RIGHT AFT LAV WAS REPORTED THAT THE EMERGENCY HORN AND LIGHT REPEATLY TRIPPED. THEY ALSO REPORTED SMELLIN (N104DU)
- [SDR DALA2025021601168](https://openairdocs.org/sdr/DALA2025021601168), Feb 16, 2025: Airbus A320212. OUTLET. SMOKE. SHIP 3263 DISC: DURING BOARDING, SEAT 3A +3B ELECTRICAL OUTLET SMOKING/ ONCE POWERED DOWN SMOKE STOPPED. C/A: R/R SPM P/ (N363NW)
- [SDR YENA2025021700162](https://openairdocs.org/sdr/YENA2025021700162), Feb 13, 2025: Emb ERJ190100IGW. CONTACTOR. FAILED. FLT#2732, LGA-BOS. (AIRCRAFT DIVERTED TO JFK AND DECLARED AN EMERGENCY). ' AT ABOUT 500'AGL ON TAKEOFF FROM LGA, AC BUS  (N283JB)
- [SDR SIMA20241228001](https://openairdocs.org/sdr/SIMA20241228001), Dec 28, 2024: Emb ERJ170100SE. OUTLET. SPARKS. SEAT 11C OUTLET SPARKED WHEN PAX USED OUTLET, CABIN HAD A BURNING SCENT. ALL CABIN POWER OUTLETS DEFERRED PER MEL 24-24  (N751AB)
- [SDR DALA2024123012061](https://openairdocs.org/sdr/DALA2024123012061), Dec 28, 2024: Airbus A320212. IRU. SHORTED. SHIP 3255 DISC: DURING COCKPIT PREFLIGHT WE SMELLED SOMETHING THEN GOT A C/B TRIPPED R ELEC BAY MESSAGE ON ECAM. C/A: FO (N355NW)
- [SDR CALA2024120603028](https://openairdocs.org/sdr/CALA2024120603028), Dec 4, 2024: Boeing 777300ER. GCU. FAILED. POWER DROPPED OFF LINE PRIOR TO PUSHBACK. FLAGGED SDR FOR LOSS OF ELEC POWER REPLACED APU GENERATOR CONTROL UNIT REF AMM (N2645U)
- [SDR CALA2024120501405](https://openairdocs.org/sdr/CALA2024120501405), Dec 4, 2024: Boeing 777300ER. GCU. ODOR. POWER DROPPED OFFLINE PRIOR TO PUSHBACK. FLAGGED SDR FOR LOSS OF ELEC POWER REPLACED APU GENERATOR CONTROL UNIT REF AMM  (N2645U)
- [SDR DALA2024120411438](https://openairdocs.org/sdr/DALA2024120411438), Dec 2, 2024: Airbus A320212. LIGHT SYS. INTERMITTENT. SHIP 3245 DISC: DUIRNG ENGINE START WE HAD A VERY HARD POWER TRANSFER AND BRIEFLY SMELT AN ELECTRICAL ODDOR THAT QUICKLY (N345NW)
- [SDR DALA2024083108604](https://openairdocs.org/sdr/DALA2024083108604), Aug 28, 2024: Airbus A350941. OUTLET. ODOR. ELECTRICAL BURNT/ SMOKE SMELL BETWEEN ROW 40-45, CAPT SIDE. ALL LIGHTS IFES WORKING. FOUND PED POWER LIGHT INOP AT SEAT  (N520DN)
- [SDR YENA2024073001064](https://openairdocs.org/sdr/YENA2024073001064), Jul 29, 2024: Airbus A321271N. OUTLET. FUMES. FLT#733, BOS-SFO. 'BURNT RUBBER ODOR NOTICE BY INFLIGHT CREWMEMBERS AROUND ROW 19-26. INSEAT POWER SUPPLY SYSTEM TURNED  (N2156J)
- [SDR IPXA2024073075528](https://openairdocs.org/sdr/IPXA2024073075528), Jul 29, 2024: Boeing 767300. TRANSFORMER. FAULTED. GROUND SERVICE 28 V AC BUS TRANSFORMER 2 LOW VOLTAGE WIRE DAMAGED. REMOVED AND REPLACED 28 VAC BUS TRANSFORMER 2 IN REFE (N377UP)
- [SDR DALA2024072707520](https://openairdocs.org/sdr/DALA2024072707520), Jul 26, 2024: Airbus A321211. OUTLET. ODOR. AIRCRAFT 3054, DURING TAXI OUT PILOTS NOTICED EXHAUST SMELL ON FLIGHT DECK. INITIALLY THOUGHT IT WAS AIRCRAFT IN FRONT O (N354DN)
- [SDR CALA2024072600289](https://openairdocs.org/sdr/CALA2024072600289), Jul 21, 2024: Boeing 737924ER. OUTLET. FAULTED. PC POWER SYSTEM DOES NOT OPERATE CORRECTLY PASSENGER CABIN PC POWER OUTLET IN ROWS 10D AND 36F HAVE RED LIGHTS ILLUMINAT (N69835)
- [SDR QMLA2024062720075](https://openairdocs.org/sdr/QMLA2024062720075), Jun 25, 2024: Urocop EC130B4. OUTLET. FAILED. CREW REPORTED "SMELL OF BURNING PLASTIC IN CABIN" AND RETURNED TO BASE. MECHANIC FOUND FAULTY GFCI OUTLET (LH MED WALL)  (N358AM)
- [SDR AALA202406245048](https://openairdocs.org/sdr/AALA202406245048), Jun 21, 2024: Airbus A321231. STRUT. OUT OF RIG. AIRCRAFT WAS GROUNDED: DURING FINAL APPROACH INTO LAS WHILE SELECTING FLAPS 2 THE FLIGHT CREW REPORTED A FLAPS LOCKED AL (N908AA)
- [SDR A6WA202406048761](https://openairdocs.org/sdr/A6WA202406048761), Jun 4, 2024: Cndair CL6002B19. FLAP SYSTEM. WARNING MESSAGE. AT FL240, RECEIVED FLAPS FAIL CAUTION MESSAGE. FLAPS AT 0 DEGREES. BTMS TEMPS 4,3,4 AND 7. PERFORMED FLAP RESET PROCEDUR (N470ZW)
- [SDR DALA2024052605515](https://openairdocs.org/sdr/DALA2024052605515), May 25, 2024: Boeing 737932ER. OUTLET. CONTAMINATED. AIRCRAFT 3804, PASENGER PED AT SEATS 2A/B BEGAN SMOKING IN THE CLIMB. SMOKE STOPPED WHEN FA'S TURNED OFF POWER TO PAX PE (N804DN)
- [SDR AALA202405168384](https://openairdocs.org/sdr/AALA202405168384), May 15, 2024: Boeing 737823. OUTLET. SHORTED. AIRCRAFT WAS GROUNDED: UNIDENTIFIED ODOR EMANATING IN THE LAST 3 ROWS OF MAIN CABIN. THE ODOR IS COMPARABLE TO A BURNING (N329SL)
- [SDR DALA2024051505220](https://openairdocs.org/sdr/DALA2024051505220), May 11, 2024: Airbus A320212. ELECTRICAL BOX. ODOR. SHIP 3269 - DIV - TO CVG DUE TO ELECTRICAL SMELL IN CABIN. CORRECTIVE ACTION: FOUND SMELL COMING FROM SEB UNDER SEAT 20F (N369NW)
- [SDR FDEA202403210330](https://openairdocs.org/sdr/FDEA202403210330), Mar 21, 2024: Boeing 7673S2F. OUTLET. INOPERATIVE. EFB POWER OUTLET ON THE FO SIDE WAS NOT PROVIDING 110V AC POWER. WHEN THE F/O PLUGGED INTO THE 110V AC POWER OUTLET WE S (N126FE)
- [SDR SWAA2024021953640](https://openairdocs.org/sdr/SWAA2024021953640), Feb 18, 2024: Boeing 737752. CIRCUIT BREAKER. TRIPPED. DURING CLIMBOUT THERE WAS A CLICK SOUND AND THEN THE LOWER DU BLANKED; THE LEFT FWD;RIGHT AFT AND LEFT CTR FUEL LOW PRES (N7886A)
- [SDR DALA2023120609982](https://openairdocs.org/sdr/DALA2023120609982), Dec 5, 2023: Airbus A321271N. UNKNOWN. UNKNOWN. SHIP 5017 BOTH AFT FA REPORTED SMELLING BURNING PLASTIC FROM APPLICATION OF T/O PWR UNTIL 2 MIN AFTER T/O. SMELL WENT AW (N517DN)
- [SDR DALA2023112109569](https://openairdocs.org/sdr/DALA2023112109569), Nov 19, 2023: Airbus A319114. UNKNOWN. UNKNOWN. SHIP 3141 -DIV/SMKE- DUE TO VISIBLE SMOKE IN THE CABIN WITH AN ELECTRICAL SMELL COMING FROM AN ELECTRICAL SOCKET AT ROW  (N341NB)
- [SDR DALA2023111009273](https://openairdocs.org/sdr/DALA2023111009273), Nov 9, 2023: Boeing 737832. UNKNOWN. UNKNOWN. (LOG 9593504) AT ABOUT 1000' AGL WHILE ON APPROACH TO TPA, THE FA, SMELLED A ELECTRICAL AND THEN A CHEMICAL SMELL IN THE (N3731T)
- [SDR SIMA20231020001](https://openairdocs.org/sdr/SIMA20231020001), Oct 20, 2023: Emb ERJ170200LR. UNKNOWN. UNKNOWN. BURNING ELECTRICAL SMELL AFTER ENG 2 START IN COCKPIT AND GALLEY "TRANSFERRED TO NRWC 029-MIA-03706"-C/A-RAR RICC IAW AM (N229NN)
- [SDR CALA2023101703090](https://openairdocs.org/sdr/CALA2023101703090), Oct 16, 2023: Boeing 777222. GCU. UNKNOWN. ELEC BUS ISLN R EICAS ADVISORY RIGHT BUS TIE ISOLATION SWITCH OFF OR FAULT PREVENTING NORMAL BUS TIE OPERATION HAS OCCUR (N228UA)
- [SDR DALA2023101208371](https://openairdocs.org/sdr/DALA2023101208371), Oct 12, 2023: Airbus A320*. UNKNOWN. UNKNOWN. SHIP 5029 CREW REPORTED: MIDWAY THRU FLIGHT AND DURING DESCENT FLT ATT SMELL HOT PLASTIC AROUND ROW 25-27. CORRECTIVE AC (N529DT)
- [SDR DALA2023100208067](https://openairdocs.org/sdr/DALA2023100208067), Sep 30, 2023: Airbus A319114. UNKNOWN. UNKNOWN. SHIP3129 EXCESSIVE PLAY FLAP DRIVE LEVER 2 ON RH IB FLAP. CORRECTIVE ACTION: REMOVED AND REINSTALL FLAP DRIVE LEVER 2 ON (N329NB)
- [SDR 2023FA0000416](https://openairdocs.org/sdr/2023FA0000416), Aug 12, 2023: Croman SH3H. TRANS RECTIFIER. FAILED. WHILE FLYING, A BURNING SMELL WAS OBSERVED AS WELL AS VISIBLE SMOKE COMING FROM THE E-BAY. A PRECAUTIONARY LANDING WAS P (N628CK)
- [SDR AALA202308044413](https://openairdocs.org/sdr/AALA202308044413), Aug 1, 2023: Boeing 7879. CONTROL PANEL. BURNED. AIRCRAFT WAS GROUNDED: "ELEC GEN OFF R2" DISPLAYED ON SYNOPTIC WOULD NOT RESET. MAINTENANCE FOUND ELECTRICAL ARC FLASH W (N830AN)

All 872: https://openairdocs.org/jasc/2450/reports.md

## Other codes in chapter 24

- [JASC 2400](https://openairdocs.org/jasc/2400): Electrical Power System (1,186 reports)
- [JASC 2410](https://openairdocs.org/jasc/2410): Alternator-Generator Drive (891 reports)
- [JASC 2420](https://openairdocs.org/jasc/2420): AC Generation System (1,302 reports)
- [JASC 2421](https://openairdocs.org/jasc/2421): AC Generator-Alternator (4,273 reports)
- [JASC 2422](https://openairdocs.org/jasc/2422): AC Inverter (557 reports)
- [JASC 2423](https://openairdocs.org/jasc/2423): Phase Adapter (15 reports)
- [JASC 2424](https://openairdocs.org/jasc/2424): AC Regulator (480 reports)
- [JASC 2425](https://openairdocs.org/jasc/2425): AC Indicating System (137 reports)
- [JASC 2430](https://openairdocs.org/jasc/2430): DC Generating System (1,120 reports)
- [JASC 2431](https://openairdocs.org/jasc/2431): Battery Overheat Warning System (82 reports)
- [JASC 2432](https://openairdocs.org/jasc/2432): Battery/Charger System (2,249 reports)
- [JASC 2433](https://openairdocs.org/jasc/2433): DC Rectifier/Converter (197 reports)
- [JASC 2434](https://openairdocs.org/jasc/2434): DC Generator-Alternator (849 reports)
- [JASC 2435](https://openairdocs.org/jasc/2435): Starter-Generator (2,052 reports)
- [JASC 2436](https://openairdocs.org/jasc/2436): DC Regulator (313 reports)
- [JASC 2437](https://openairdocs.org/jasc/2437): DC Indicating System (98 reports)
- [JASC 2440](https://openairdocs.org/jasc/2440): External Power System (169 reports)
- [JASC 2460](https://openairdocs.org/jasc/2460): DC Power Distribution System (608 reports)
- [JASC 2497](https://openairdocs.org/jasc/2497): Electrical Power System Wiring (2,202 reports)

---
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.