# JASC 4500: Central Maintenance Computer

- Type: JASC system/component code (FAA)
- ATA chapter: 45 Central Maintenance System (CMS)
- Title in the code table: CENTRAL MAINT. COMPUTER
- Service difficulty reports: 16
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=43
- Page: https://openairdocs.org/jasc/4500

## What it covers

The unit, components and associated systems which interface with other airplane systems and provides a convenient way of communicating system problems to aircraft maintenance personnel. The system contains checkout and fault isolation procedures using a central computer to locate a single system or component malfunction. Typical parts are computer, storage devices, controls, display, etc.

## Service difficulty reports (16)

- [SDR DALA2025060404255](https://openairdocs.org/sdr/DALA2025060404255), Jun 2, 2025: Airbus A330223. CONTROLLER. FAULTED. SHIP 3354 - ATO - AT 40 KTS DUE TO DATA LINK FAULT. CORRECTIVE ACTION: REPLACED ATSU AND ENSURED SOFTWARE WAS CORRECT. O (N854NW)
- [SDR DALA2024050905065](https://openairdocs.org/sdr/DALA2024050905065), May 4, 2024: Airbus A330941. PRINTER. ODOR. SHIP 3416 ELECTRICAL FUME ODOR FLIGHT DECK IN CRUISE. DONNED OXY MASK. CORRECTIVE ACTION: REPLACED ACARS PRINTER. OK FOR (N416DX)
- [SDR DALA2024042204641](https://openairdocs.org/sdr/DALA2024042204641), Apr 20, 2024: Airbus A330941. PRINTER. FAILED. SHIP 3420 - DIV - INTO KEF DUE TO ELECTRICAL BURNING SMELL IN FLIGHT DECK. CORRECTIVE ACTION: REPLACED ACARS PRINTER. OK (N420DX)
- [SDR YENA2024020500224](https://openairdocs.org/sdr/YENA2024020500224), Feb 3, 2024: Airbus BD5001A11. CONTROL UNIT. FAILED. FLT#771. BOS-CUN. (AIRCRAFT PERFORMED AN AIR TURN BACK TO BOS). 'AFTER FIRST ENGINE START, INFLIGHT CREW ALERTED US THAT (N3121J)
- [SDR DALA2022090605967](https://openairdocs.org/sdr/DALA2022090605967), Sep 3, 2022: Airbus A330941. NONE. NONE. SHIP 3404 SMELLED BURNING PLASTIC, THEN SHORTLY AFTER 30 SECONDS TO 1 MINUTE "PRINTER FAIL" APPEARED ON FMC#3. SMELL DIS (N404DX)
- [SDR DALA2022072005014](https://openairdocs.org/sdr/DALA2022072005014), Jul 16, 2022: Airbus A321211. COMPUTER. INSTALLED. C/W ER/A 600868-14 REV ORIG SEC I - A/C 3085 FOMAX 3 UPGRADE AND ACMS LOAD B 2.5 UPGRADE. C/W ER/A 600868-14 REV ORIG SE (N385DZ)
- [SDR SWIA2021090860820](https://openairdocs.org/sdr/SWIA2021090860820), Sep 7, 2021: Emb ERJ170200LR. PROCESSOR. FAULTED. AVNX MAU 1B FAIL DURING ARRIVAL INTO AIRPORT. DEGRADED NAVIGATION PERFORMANCE. LOSS OF CA AND FO PFD. LOSS OF NAV/COM 1. (N306SY)
- [SDR AALA202012059001](https://openairdocs.org/sdr/AALA202012059001), Dec 4, 2020: Airbus A320214. MONITOR. MALFUNCTIONED. AIRCRAFT WAS GROUNDED. REJECTED TAKE OFF AT APPROXIMATELY 70 KNOTS DUE TO SPURIOUS ELECTRONIC CENTRALIZED AIRCRAFT MONIT (N105UW)
- [SDR CA190802002](https://openairdocs.org/sdr/CA190802002), Aug 1, 2019: Boeing 7879. DATA UNIT. FAILED. (CAN) AT TOP OF DECENT CREW HAS MSGS COME UP WITH AUTO BRAKES OFF. 2 LEFT BRAKES INOP, TRUST REVERSES INOP, NOSE WHEEL B
- [SDR CALA2013100791797](https://openairdocs.org/sdr/CALA2013100791797), Oct 5, 2013: Boeing 747422. COMPUTER. MALFUNCTIONED. IAW DF0504 CTR CDU INOPERATIVE, NEED TO REPLACE "RIGHT CMC" ON ACCNT "CMC-R FAIL" MESSAGE 45040 COMES UP. REPLACED RT CM (N178UA)
- [SDR SWAA2013062417451](https://openairdocs.org/sdr/SWAA2013062417451), Jun 18, 2013: Boeing 7373H4. CRADLE. FAULTY. ON LANDING ROLL STRONG ELECTRICAL BURNING SMELL IN COCKPIT--OPC RADOME CIRCUIT BREAKER POPPED. OPC CHARGING CRADLE FOUND (N614SW)
- [SDR SWAA2012120410218](https://openairdocs.org/sdr/SWAA2012120410218), Dec 1, 2012: Boeing 7377H4. COMPUTER. FAILED. FUMES DETECTED ON AIRCRAFT. INSPECTED COMPUTER PER 05-51-56 FOUND OPC TO BE THE CAUSE OF ODOR. (N763SW)
- [SDR ZKFR201109286209](https://openairdocs.org/sdr/ZKFR201109286209), Sep 28, 2011: Hawbee 4000. CIRCUIT CARD. FAILED. FOUND CMC CARD TO BE FAILED. R & R CMC MODULE ASSY (CARD). OPS CHECKS GOOD. (N78KN)
- [SDR VNAA2011071500014](https://openairdocs.org/sdr/VNAA2011071500014), Jul 11, 2011: Cndair CL6002B19. COMPUTER. FAILED. AT CLT, CREW REPORTED LIGHTNING STRIKE ON CAPTAIN’S SIDE LOWER LEFT CENTER OF WINDSCREEN IN FLIGHT. MAINTENANCE INSPECTE (N242JS)
- [SDR NWAA085043358](https://openairdocs.org/sdr/NWAA085043358), Nov 9, 2008: Airbus A330223. PRINTER. FAILED. PRINTER FAILED AND SMOKE CAME FROM PRINTER, TURNED OFF PRINTER AND SMOKE STOPPED. PRINTER REPLACED AND TEST NORMAL. (N858NW)
- [SDR 0502013265](https://openairdocs.org/sdr/0502013265), Dec 30, 2005: Airbus A320212. PRINTER. SMOKE. PRINTER STARTED SMOKING DURING FLIGHT. PULLED C/B AND LIFTED PRINTER COVER. NO FURTHER PROBLEMS. PRINTER REMOVED AND REP (N365NW)

## Other codes in chapter 45

- [JASC 4597](https://openairdocs.org/jasc/4597): Central Maintenance System Wiring (1 reports)

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