# JASC 3140: Central Computers

- Type: JASC system/component code (FAA)
- ATA chapter: 31 Instruments
- Title in the code table: CENTRAL COMPUTERS (EICAS)
- Service difficulty reports: 619
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=32
- Page: https://openairdocs.org/jasc/3140

## What it covers

The systems and components used for computing data from a number of different sources without a preponderance of functions in any one system, for call up on a display. Includes integrated instrument systems such as engine, airplane power and central warning indicators when combined into a central display. Typical parts are "digital core avionic system" (DCAS), "engine indications and crew alerting system" (EICAS), stored checklist, emergency procedures, company regulations, etc.

## Service difficulty reports (619, newest 50)

- [SDR MASA2026101800049](https://openairdocs.org/sdr/MASA2026101800049), Oct 18, 2026: Emb ERJ170200LR. MAU. FAULTED. ACFT RETURNED TO FIELD, DECLARED AN EMERGENCY AFTER TAKEOFF, WHEN MULTIPLE MESSAGES APPEARED. AT FAIL/FMS SPEED ON PFD W (N89304)
- [SDR U9LA20260830696](https://openairdocs.org/sdr/U9LA20260830696), Aug 30, 2026: Gulstm GVIIG600. IO CARD. FAILED. SUSPECTED DGIO FAILURE. MULTIPLE SYSTEMS FAILURES, APPARENT PRESSURIZATION FAILURES, HYDRAULIC FAILURES, BREAK FAILURES, (N696GA)
- [SDR R61A2026070300184](https://openairdocs.org/sdr/R61A2026070300184), Jul 3, 2026: Emb ERJ170200LR. MAU. FAULTED. AVNX MAU 3A FAULT WHILE CRUISING AT 23,000 FT. ASSOCIATED AP AND ALT FAIL CAUTION MESSAGES. BOTH FMS NAV FELL OFF PFD. M (N111HQ)
- [SDR SIMA20260619001](https://openairdocs.org/sdr/SIMA20260619001), Jun 19, 2026: Emb ERJ170200LR. MAU. FAULTED. AVNX MAU 1A FAIL IN FLIGHT. CHECK ADDITIONAL EICAS MSG'S (EMERGENCY DECLARED) PERFORMED SYS T/S AS PER EMB-175 FIM 31-41 (N285NN)
- [SDR IXXA20260609048](https://openairdocs.org/sdr/IXXA20260609048), Jun 9, 2026: Boeing 767323. EICAS. INOPERATIVE. REJECTED TAKE OFF DUE TO LOW SPEED REJECT 60 AND 65 KNOTS. LOST BOTH EICAS SCREENS. STANDBY ENG BACKUP DID NOT WORK. ENG (N251AZ)
- [SDR SIMA20260605001](https://openairdocs.org/sdr/SIMA20260605001), Jun 5, 2026: Emb ERJ170200LR. MODULE. FAILED. AVNX MAU 1B FAULT /SPOILER FAULT ON FINAL DESCENT. REJECTED TO AT APPROXIMATELY 60 KNTS. CAUTION WAS ACCOMPANIED WITH AN (N289MW)
- [SDR 2026FA0000269](https://openairdocs.org/sdr/2026FA0000269), Apr 6, 2026: Bolkms BK117D3. AMU. DEGRADED. AIRCRAFT PASSED PREFLIGHT CHECKS. DURING TAKEOFF THE MAST MOMENT SYSTEM STOPPED INDICATING. FLIGHT WAS ABORTED. FOUND A  (N540SF)
- [SDR HNAA2026021600119](https://openairdocs.org/sdr/HNAA2026021600119), Feb 15, 2026: Emb EMB145LR. DAU. INTERMITTENT. DAU 2A FAIL INTERMITENLY IN FLIGHT. R&R DAU #200 IAW AMM 31-41-01. OPS CHECK GOOD. NO MSG ON EICAS OK FOR SAERVICE AT TH (N659AE)
- [SDR CVGA20251210001](https://openairdocs.org/sdr/CVGA20251210001), Dec 6, 2025: Beech B300. POWER SUPPLY. INTERMITTENT. AUTOPILOT DISENGAGED AND THEN WE HAD A COMPLETE NAVIGATION FAILURE ON THE PFDS AND THE MFD. FMS DATA WAS REMOVED. RED FL (N831UP)
- [SDR SWIA2025120500004](https://openairdocs.org/sdr/SWIA2025120500004), Dec 4, 2025: Emb ERJ170200LL. PROCESSOR. FAULTED. AVNX MAY 1 FAIL CLIMBING OUT OF SEA. (FLIGHT 4068) INTERROGATED CMC FOUND FAULT CODE 45452143CMC AVNX MAU 1A FAIL. TROUB (N304SY)
- [SDR R61A202510271485](https://openairdocs.org/sdr/R61A202510271485), Oct 26, 2025: Emb ERJ170200LR. MAU. FAILED. AVNX MAU 1A FAIL IN FLIGHT. EMERGENCY DECLARED, LANDED WITHOUT INCIDENT. PERFORMED RTS ON FLIGHT CONTROL AND PERFORMED C (N117HQ)
- [SDR R61A2025082200378](https://openairdocs.org/sdr/R61A2025082200378), Aug 22, 2025: Emb ERJ170200LR. MAU. FAILED. AVNX MAU 1A FAIL. EMERGENCY DECLARED, LANDED WITHOUT INCIDENT. REMOVED AND REPLACED MAU 1 NIC PROC 1. (N240JQ)
- [SDR CALA2025082508082](https://openairdocs.org/sdr/CALA2025082508082), Aug 22, 2025: Boeing 7673CB. DISPLAY. FAULTED. EICAS UPPER DISPLAY BLANK AFTER TAKEOFF. NO AUTO. INTERMITTENT ON/OFF UPON ARIVAL FOUND UPPER EICAS DISPLAY FULLY OPS. P (N684UA)
- [SDR R61A2025072000314](https://openairdocs.org/sdr/R61A2025072000314), Jul 20, 2025: Emb ERJ170200LR. MAU. FAILED. AVNX MAU 1A FAIL. EMERGENCY DECLARED, LANDED WITHOUT INCIDENT. REMOVED AND REPLACED NIC PROC MOD 1. (N240JQ)
- [SDR IXXA20250713030](https://openairdocs.org/sdr/IXXA20250713030), Jul 13, 2025: Boeing 767323. COMPUTER. FAULTED. AIR TURN BACK INITIATED DUE TO MULITPLE ENGINE INDICATION FLUCTUATIONS FOR EXHAUST GAS TEMPERATURE, OIL PRESSURE, OIL TE (N229AZ)
- [SDR R61A2025060200256](https://openairdocs.org/sdr/R61A2025060200256), May 29, 2025: Emb ERJ170200LR. MAU. FAILED. AVNX MU 2A FAIL AND FMS 1FAIL IN FLIGHT FOLLOWED BY STEER INOP. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. REMOVED AND (N218JQ)
- [SDR IXXA20250319014](https://openairdocs.org/sdr/IXXA20250319014), Mar 17, 2025: Boeing 767323. INDICATOR. MALFUNCTIONED. CREW REPORTED ON TAXI OUT BOTH EICAS SCREENS BLANK FOLLOWED BY COMPACT MODE. UPPER EICAS BLANK THEN HOT ELECTRICAL SMOKE (N379AZ)
- [SDR SIMA20250302001](https://openairdocs.org/sdr/SIMA20250302001), Mar 2, 2025: Emb ERJ170100SE. DISPLAY. FAILED. DURING CRUISE, LOUD POPPING SOUND FOLLOWED BY FAILURE OF EICAS DISPLAY WITH STRONG BURNING PLASTIC SMELL. DECLARED EMERG (N788CJ)
- [SDR VNAA2025021011102](https://openairdocs.org/sdr/VNAA2025021011102), Feb 6, 2025: Cndair CL6002C10. DCU. UNSERVICEABLE. ON DESCENT BURNING SMELL CBP2 Q2 POPPED. DCU AURAL INOP STATUS MESSAGE. THERE WAS NO MEDICAL ATTENTION REPORTED / INSPEC (N543EA)
- [SDR VNAA2025021011101](https://openairdocs.org/sdr/VNAA2025021011101), Feb 6, 2025: Cndair CL6002C10. DCU. FAULTED. DCU 1 SWITCH LIGHT CAME ON WITH NO ASSOCIATED MSG WITH BURNING SMELL IN COCKPIT. THERE WAS NO MEDICAL ATTENTION REPORTED (N705PS)
- [SDR A6WA202501318855](https://openairdocs.org/sdr/A6WA202501318855), Jan 31, 2025: Cndair CL6002B19. DRIVER UNIT. FAULTED. AFTER ARRIVE A/C, BURNING SMELL ON EXT AC POWER. SWITCHED TO APU GEN. OVERHEAD PANEL LIGHTS FLICKERING AND BURNING SMELL (N411ZW)
- [SDR 2025F00019](https://openairdocs.org/sdr/2025F00019), Jan 11, 2025: Pilats PC1247E. POWER SUPPLY. UNSERVICEABLE. UPON REACHING FL240 AND LEVELING OFF FOR CRUSE THE RIGHT SIDE SCREENS SHOWED RED X ACROSS THEM. GPS SYSTEMS RESET AND BE (N997DJ)
- [SDR ABXA2024042985](https://openairdocs.org/sdr/ABXA2024042985), Apr 29, 2024: Boeing 767232. COMPUTER. MALFUNCTIONED. DURING TAXI OUT MASTER CAUTION LIGHT & AURAL CAME ON CONTINUOUSLY. SPOILER ADVISORY MSG LATER APPEARED. SPOILERS AUTO DE (N750AX)
- [SDR R61A2024032200129](https://openairdocs.org/sdr/R61A2024032200129), Mar 18, 2024: Emb ERJ170200LR. POWER SUPPLY. FAULTY. AVNX MAU 3A FAIL. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. R&R MAU 3 POWER SUPPLY 1. R&R NIC PROC 5. (N111HQ)
- [SDR DALA2024021502205](https://openairdocs.org/sdr/DALA2024021502205), Feb 14, 2024: Boeing 717200. DISPLAY. INOPERATIVE. SHIP 9577 -MISC/DE- THE FLIGHT CREW REPORTED ELECTRICAL ISSUES, VIA FAILURE, FCP BLANKING, NAV DISPLAY BLANKING, FLIGHT  (N921AT)
- [SDR YENA2024011100033](https://openairdocs.org/sdr/YENA2024011100033), Jan 6, 2024: Emb ERJ190100IGW. UNKNOWN. UNKNOWN. FLT#1238, AUS-BOS. (AIRCRAFT DIVERTED TO JFK AND DECLARED AN EMERGENCY) 'AVNX MAU 2B FAIL UPON REACHING CRUISE ALT AT 37 (N206JB)
- [SDR CALA2023111503365](https://openairdocs.org/sdr/CALA2023111503365), Nov 10, 2023: Boeing 757224. CLUTCH. OUT OF ADJUST. LOW SPEED REJECTED T.O. 50 KIAS DUE TO SPOILERS EICAS MESSAGE WILL NOT ALWAYS DRIVE TO THE DEPLOY POSITION AND DOES NOT  (N17133)
- [SDR R61A2023042500248](https://openairdocs.org/sdr/R61A2023042500248), Apr 19, 2023: Emb ERJ170200LR. PROCESSOR. FAULT MESSAGE. AVNX MAU 3B FAIL. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. R&R NIC PROC 6. (N113HQ)
- [SDR SIMA20230310001](https://openairdocs.org/sdr/SIMA20230310001), Mar 10, 2023: Emb ERJ170200LR. NONE. NONE. EICAS FAULT EICAS SCREEN TURNED OFF MOMENTARILY A BURNING SMEL AFTERA FEW SECONDS THE SMELL DISAPPEAR.-C/A-SWAPPED EICAS (N259NN)
- [SDR OEJA202303070001](https://openairdocs.org/sdr/OEJA202303070001), Mar 4, 2023: Boeing 75. NONE. NONE. WE CANCELED TAKEOFF CLEARANCE AND I TOLD THEM WE GOT A CONFIGURATION WARING AND WE WERE TRYING TO SORT IT OUT. I WAS TUR (N470FL)
- [SDR 2023FA0000133](https://openairdocs.org/sdr/2023FA0000133), Feb 26, 2023: Cessna 172S. EFIS. INTERMITTENT. WHILE MANEUVERING, THE ENGINE INDICATORS ON THE G1000 HAD RED X'S ON THE FOLLOWING INSTRUMENTS, TACHOMETER, FUEL FLOW, O (N15255)
- [SDR U5QA202302130111](https://openairdocs.org/sdr/U5QA202302130111), Feb 13, 2023: Bombdr BD1001A10. NONE. NONE. IAPS FAN FAULT WITH STRONG SMELL OF WIRING BURNING, SMELL WAS THROUGHOUT CABIN. B# CODE B3-006932. MX C/A: PERFORMED VIS (N546XJ)
- [SDR 2023FA0000135](https://openairdocs.org/sdr/2023FA0000135), Feb 10, 2023: Cessna 172S. EFIS. INTERMITTENT. DURING FLIGHT, ENGINE INDICATORS ON THE MFD HAD DROPPED TO ZERO AND RED X'D. CYCLED CIRCUIT BREAKERS, AND RESTARTED OUR  (N15255)
- [SDR 2023FA0000134](https://openairdocs.org/sdr/2023FA0000134), Feb 10, 2023: Cessna 172S. EFIS. INTERMITTENT. ON THE GROUND STARTED THE AIRCRAFT AND ALL THE ENGINE INDICATING INSTRUMENTS SHOWED RED X'S ON THE G1000. SHUT DOWN AIRC (N15255)
- [SDR IXXA20221101144](https://openairdocs.org/sdr/IXXA20221101144), Oct 29, 2022: Boeing 76736N. DISPLAY. FAILED. LOWER EICAS DISPLAY WAS BLANK UPON ARRIVAL. AIRCRAFT GROUNDED FOR FAULT ISOLATION. REMOVED EICAS DISPLAY SWITCHING MODUL (N1049A)
- [SDR R61A2022061700395](https://openairdocs.org/sdr/R61A2022061700395), Jun 14, 2022: Emb ERJ170200LR. PROCESSING UNIT. FAILED. AVNX MAU 2B FAIL IN FLIGHT. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. R&R NIC PROC MOD 4 LOCATED IN MAU 2 NIC 2. (N232JQ)
- [SDR SIMA20220531001](https://openairdocs.org/sdr/SIMA20220531001), May 31, 2022: Emb EMB145LR. NONE. NONE. WHIFF OF STRONG ELECTRICAL BURNING ODOR LASTED ABOUT 10 SECOUNDS. 3 - 5 MINUTES INTER CA SIDE MFD TURNED OFF FOR 10 SECO (N694AE)
- [SDR YENA2022052600525](https://openairdocs.org/sdr/YENA2022052600525), May 23, 2022: Emb ERJ190100IGW. MAU. FAILED. FLT#6102, RIC-MCO (AIRCRAFT DECLARED AN EMERGENCY INTO MCO). ' AVNX MAU1 FAILURE DURING ARRIVAL INTO MCO QRH PROCEDURE A (N334JB)
- [SDR YENA2022052300512](https://openairdocs.org/sdr/YENA2022052300512), May 19, 2022: Emb ERJ190100IGW. MAU. FAILED. FLT#1734, PBI-DCA. (AIRCRAFT DIVERTED TO RIC).' DURING CRUISE FLT FL370 WE HAD A/P AND A/T FAIL. FMS1 INOP, ACARS INOP.  (N334JB)
- [SDR UIEA2022051400479](https://openairdocs.org/sdr/UIEA2022051400479), May 14, 2022: Boeing 74787UF. DISPLAY. INOPERATIVE. COCKPIT, PANEL BACKGROUND LIGHT INOP.(REMOVED & REPLACED EICAS DISPLAY SELECT PANEL M10195 &; OPS CHECK OK AMM 31-41-03. (N649GT)
- [SDR YENA2022041300370](https://openairdocs.org/sdr/YENA2022041300370), Apr 12, 2022: Airbus A321271N. EICAS. WARNING LIGHT. FLT#2348, LAS-JFK. 'SEVERE TURB ENCOUNTERED AT FL330. 5-10 IN DURATION. ATTITUDE +500 AIRSPEED +30 KTS. AIRCRAFT ENTERED (N2060J)
- [SDR AALA202203212236](https://openairdocs.org/sdr/AALA202203212236), Mar 18, 2022: Airbus A320214. NONE. FAULTY. AIRCRAFT WAS GROUNDED: UNABLE TO CONTROL CABIN PRESSURIZATION IN AUTO OR MANUAL. BOTH CHANNELS. FLIGHT DIVERTED TO PHX,  (N110UW)
- [SDR VNAA202203181112](https://openairdocs.org/sdr/VNAA202203181112), Mar 15, 2022: Cndair CL6002C10. NONE. NONE. EN ROUTE TO CLT THE CREW GOT A RUDDER LIMITER CAUTION MESSAGE. THEY RAN THE QRH AND DECLARED A EMERGENCY. THE EMERGENCY  (N502AE)
- [SDR SIMA20211206004](https://openairdocs.org/sdr/SIMA20211206004), Dec 6, 2021: Emb EMB145LR. NONE. NONE. SPS ADVANCE MESSAGE ON EICAS ASSOCIATED WITH UNRELIABLE AIRSPEED ON #1 PFD DECLARED EMERGENCY.-C/A-RAR IC-600 #1 W/ AP I (N678AE)
- [SDR SWIA202163426](https://openairdocs.org/sdr/SWIA202163426), Nov 14, 2021: Cndair CL6002D24. NONE. CORRODED. MAIN AVIONICS BAY STR 23R CORRODED BETWEEN FS333.00 AND FS349.00 (C CHECK RO 12-31-21) REPLACED MAIN AVIONICS BAY STR 23 (N824SK)
- [SDR VNAA202111151113](https://openairdocs.org/sdr/VNAA202111151113), Nov 13, 2021: Cndair CL6002C10. DCU. FAULTED. SHORTLY AFTER DEPARTING OUT OF VPS, CREW REPORTED TO GET "EVERY CAUTION MESSAGE YOU COULD THINK OF", AND DECIDED TO DIVE (N503AE)
- [SDR R61A2021111000898](https://openairdocs.org/sdr/R61A2021111000898), Nov 6, 2021: Emb ERJ170200LR. I/O MODULE. FAULT MESSAGE. SUPPLEMENTAL INFORMATION. (N635RW)
- [SDR R61A2021111000897](https://openairdocs.org/sdr/R61A2021111000897), Nov 6, 2021: Emb ERJ170200LR. I/O MODULE. FAULT MESSAGE. TAT 1 FAIL, SPDBRK FAIL, ADS 1 FAIL, SPOILER FAULT, AND AVNX MAU 3A FAULT. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT.  (N635RW)
- [SDR YENA2021110100734](https://openairdocs.org/sdr/YENA2021110100734), Oct 30, 2021: Airbus A320232. ULB. FAILED. FLT MCO-MZJ.SSFDR ULB REQ R/R AFTER FAILED OPS TEST ; R/R ULB OF SSFDR IAW AMM 31-33-55. OPS CKS PASSED (N584JB)
- [SDR YENA2021110100733](https://openairdocs.org/sdr/YENA2021110100733), Oct 30, 2021: Airbus A320232. CVR. FAILED. FLT MCO-MZJ. CVR ULB REQ R/R AFTER FAILED OPS TEST ; R/R ULB ON CVR IAW AMM 23-71-35 OPS CKS PASSED (N584JB)

All 619: https://openairdocs.org/jasc/3140/reports.md

## Other codes in chapter 31

- [JASC 3100](https://openairdocs.org/jasc/3100): Indicating/Recording System (382 reports)
- [JASC 3110](https://openairdocs.org/jasc/3110): Instrument Panel (338 reports)
- [JASC 3120](https://openairdocs.org/jasc/3120): Independent Instruments (209 reports)
- [JASC 3130](https://openairdocs.org/jasc/3130): Data Recorders (Flight/Maintenance) (126 reports)
- [JASC 3150](https://openairdocs.org/jasc/3150): Central Warning (3,981 reports)
- [JASC 3160](https://openairdocs.org/jasc/3160): Central Display (1,317 reports)
- [JASC 3170](https://openairdocs.org/jasc/3170): Automatic Data (20 reports)
- [JASC 3197](https://openairdocs.org/jasc/3197): Instrument System Wiring (202 reports)

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