# JASC 3400: Navigation System

- Type: JASC system/component code (FAA)
- ATA chapter: 34 Navigation
- Title in the code table: NAVIGATION SYSTEM
- Service difficulty reports: 692
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=36
- Page: https://openairdocs.org/jasc/3400

## What it covers

The units and components which provide aircraft navigational information. For reports which are of a general nature relating to the navigation systems. Also, for reports on equipment utilized in the flight inspection of airways systems (excluding avionics equipment normally used for flight operations of the aircraft). Use this code for reports with insufficient information to file in a more specific JASC 3400 series code. Typical flight inspection equipment would be computers, recorders, nav comms, guidance equipment, etc.

## Service difficulty reports (692, newest 50)

- [SDR DXTA2026101210096](https://openairdocs.org/sdr/DXTA2026101210096), Oct 8, 2026: Bombdr BD1001A10. PITOT TUBE. FAULTED. REPEAT WRITE UP. AMBER CAS EFIS MISCOMPARE AT 31000 FT. WE ALSO GOT THE ALT BOXED FLAG ON PFD 1 AND PFD 2. AT 31000 FEET (N797QS)
- [SDR CALA2026083119069](https://openairdocs.org/sdr/CALA2026083119069), Aug 28, 2026: Boeing 767424ER. ADM. FAULTED. ALTIMETER DISAGREE- EICAS DISPLAYED..CAP 300 LOWER THAN FO ALT AT FL270.. ON DEBRIEF FROM CREW FTL WAS 25,000 FT. CAPTAI (N69059)
- [SDR CALA2026082618926](https://openairdocs.org/sdr/CALA2026082618926), Aug 23, 2026: Boeing 777222. ADIRU. FAULTED. TCAS FAIL, BOTH CHANNELS. DEBRIEF WITH CREW, TCAS FAILED AT 15000 FT, CREW PUT IN ALT, 1 & 2, NO HELP. NO MSSG AT THIS T (N228UA)
- [SDR SWIA2026073176932](https://openairdocs.org/sdr/SWIA2026073176932), Jul 31, 2026: Emb ERJ170200LL. ANTENNA. OUT OF LIMITS. COMPLY WITH FWD ATG ANTENNA PERMANENT REPAIR REF. DRAWING 170-2365-02-RS AND M-93 ERJ175-53-26-03 (EA ERJ4111-44) (C-CHE (N84378)
- [SDR SWIA2026073176931](https://openairdocs.org/sdr/SWIA2026073176931), Jul 31, 2026: Emb ERJ170200LL. ANTENNA. OUT OF LIMITS. COMPLY WITH AFT ATG ANTENNA PERMANENT REPAIR REF. DRAWING 170-2365-02-RS AND M-93 ERJ175-53-26-03 (EA ERJ4111-44) (C-CHE (N84378)
- [SDR SWIA2026073176930](https://openairdocs.org/sdr/SWIA2026073176930), Jul 31, 2026: Emb ERJ170200LL. ANTENNA. OUT OF LIMITS. COMPLY WITH LT SIDE ATG ANTENNA PERMANENT REPAIR REF. DRAWING 170-2365-02-RS AND M-93 ERJ175-53-26-03 (EA ERJ4111-44) (C (N84378)
- [SDR SWIA2026073176929](https://openairdocs.org/sdr/SWIA2026073176929), Jul 31, 2026: Emb ERJ170200LL. ANTENNA. OUT OF LIMITS. COMPLY WITH RH SIDE ATG ANTENNA PERMANENT REPAIR REF. DRAWING 170-2365-02-RS AND M-93 ERJ175-53-26-03 (EA ERJ4111-44) (C (N84378)
- [SDR CALA2026080218186](https://openairdocs.org/sdr/CALA2026080218186), Jul 31, 2026: Boeing 737924ER. CHARGER. INOPERATIVE. ISFD WILL NOT TURN ON. PERFORMED TROUBLESHOOTING IAW FIM 34-24-00-2, TASK 804, & WDM 34-24-15. FOUND NO OUTPUT VOLTAGE O (N63820)
- [SDR ABXA20260723333](https://openairdocs.org/sdr/ABXA20260723333), Jul 23, 2026: Boeing 767341. IRU. FAULTED. CREW ABORTED T/O AT 5KTS DUE TO AN IRU GOING OFFLINE WHICH AFFECTED THE NAVIGATION. AFTER ABORTING T/O, THE ISSUE CLEARE (N760CK)
- [SDR CALA2026052716560](https://openairdocs.org/sdr/CALA2026052716560), May 26, 2026: Boeing 7378. WARNING MESSAGE. FALSE ACTIVATION. ILS 22L EWR GS NEVER CAPTURE THEN DISSAPEAR AT 1500FT ESFR REQUIRED DUE TO CREW ADVISING THEY HAD TO PERFORM A GO-AROUND (N27283)
- [SDR CALA2026052716564](https://openairdocs.org/sdr/CALA2026052716564), May 25, 2026: Boeing 737724. ADIRU. FAULTED. ON ROTATION R IRS FAULT LIGHT ILLUMINATED. DOES NOT EXTINGUISH COMPLETED ADIRU BITE FIM TASK 34-21 TASK 801, CURRENT STA (N39728)
- [SDR S2KA202604290001](https://openairdocs.org/sdr/S2KA202604290001), Apr 28, 2026: Lear 31A. INDICATION SYS. FAULTED. MOMENTARY LOSS OF AIRSPEED AND ALTIMETER. HAPPENED 2 TIMES IN FLIGHT. (N724SA)
- [SDR TSAA2026042400002](https://openairdocs.org/sdr/TSAA2026042400002), Apr 24, 2026: Boeing 737436. SYMBOL GENERATOR. FAILED. CAPTAINS SIDE EFIS DISPLAYS WENT BLANK. NR 1 SG FAILED. (N405YK)
- [SDR CALA2026041715460](https://openairdocs.org/sdr/CALA2026041715460), Apr 15, 2026: Boeing 777222. ADIRU. FAULTY. TCAS EICAS AND -TCAS FAI L- ON ND. TRIED L/R CYCL ED. NO HELP. C ALLED TOMC MMSG 34-28801 CAPTURED IN AHM BUT NOT AUTOMA (N228UA)
- [SDR ANCF20260413008](https://openairdocs.org/sdr/ANCF20260413008), Apr 11, 2026: Airbus A320214. RECEIVER. FAULTED. LOSS OF COMPLETE NAVIGATION AFTER TAKE OFF, IAW AMM 34-36-00-860-801-A RESET OF THE MULTI MODE RECEIVER WAS PERFORMED TE (N954AV)
- [SDR R61A2026041000103](https://openairdocs.org/sdr/R61A2026041000103), Apr 10, 2026: Emb ERJ170200LR. MAU. FAILED. ON FINAL APPROACH AVNX MAU 2A FAIL, AVNX MAU 3B FAIL, DC BUS 2 OFF, AND NUMEROUS ASSOCIATED MESSAGES. DECLARED EMERGENCY (N227JQ)
- [SDR VNAA2026032414702](https://openairdocs.org/sdr/VNAA2026032414702), Mar 22, 2026: Cndair CL6002D24. PANEL. ODOR. UNIDENTIFIED BURNING SMELL. SUSPECT PBS PANEL / REMOVED AND REPLACED PBS IAW CRJ 900 AMM 23€“32€“01€“000/400€“801. N (N615NN)
- [SDR TSAA2026030900001](https://openairdocs.org/sdr/TSAA2026030900001), Mar 7, 2026: Boeing 737436. SYMBOL GENERATOR. FAILED. NR 1 SYMBOL GENERATOR FAILED. (N405YK)
- [SDR CALA2026022414051](https://openairdocs.org/sdr/CALA2026022414051), Feb 21, 2026: Boeing 7378. NAVI DATABASE. DISENGAGED. VNAV DISENGAEGED AFTER TAKEOFF. WAS ABLE TO RENGAGE THROUGH ABT 7000 FEET PICTURE ATTACHED PERFORMED SENSOR STATUS CHECK (N17326)
- [SDR CALA2026021813869](https://openairdocs.org/sdr/CALA2026021813869), Feb 15, 2026: Boeing 737724. ADIRU. FAULTY. ACFT RELEASED BACK TO SERVICE AFTER EXPERIENCING A DIVERSION O R AIR TURN BACK DUE TO A MECHANICAL REASON LOCKED BY SYST (N13716)
- [SDR SWIA2026020775317](https://openairdocs.org/sdr/SWIA2026020775317), Feb 7, 2026: Cndair CL6002C10. ANTENNA. CORRODED. FOUND CORROSION AROUND 3 SCREW HOLES UNDER LH ATC L-BAND ANTENNA (C-CHECK RO 02/22/2026)REPAIRED CORROSION AROUND 3 SCRE (N613SK)
- [SDR DALA2026020200757](https://openairdocs.org/sdr/DALA2026020200757), Jan 31, 2026: Boeing 717200. MMR. NOT REPORTED. REMOVED MMR 2 IAW ER/A 625937-14. INSTALLED MMR 2 PER ER/A 625937-14 REV. B (1428881) (N967AT)
- [SDR 141A2026013000001](https://openairdocs.org/sdr/141A2026013000001), Jan 30, 2026: Cessna 208B. COORDINATOR. FAULTED. AFTER TAKING OFF FROM HRO TO FLY TO DFW MY SELF FO NOTICED THE PIC SIDE HEADING COORDINATOR WAS SWINGING ERRATICALLY AND (N803F)
- [SDR DXTA2026010906468](https://openairdocs.org/sdr/DXTA2026010906468), Jan 6, 2026: Bombdr BD1001A10. AIR DATA MODULE. FAULTED. AT FL360 WE RECEIVED AMBER EFIS MISCOMPARE WITH AMBER ATL. THE RIGHT SIDE READ 200¿ LOWER THAN THE LT & STANDBY. WHEN S (N749QS)
- [SDR SIMA202512296001](https://openairdocs.org/sdr/SIMA202512296001), Dec 26, 2025: Emb ERJ170100SE. REFERENCE UNIT. FAILED. LOST MULTIPLE NAV SYSTEMS AT 11,000FT WE LOST AUTO THROTTLE AND SHORTLY AFTER, AUTOPILOT FAILED. A FEW MINUTES LATER IRS (N750BD)
- [SDR R61A2025121600546](https://openairdocs.org/sdr/R61A2025121600546), Dec 20, 2025: Emb ERJ170200LR. POWER SUPPLY. FAULTED. DURING DECENT INTO JFK THEY HAD A MAU2B FAIL, RECEIVED MULTIPLE FAULT MESSAGES ELE L AND R FAIL, GND PROX FAIL, ADS 2 FA (N131HQ)
- [SDR 3EJA202601150007](https://openairdocs.org/sdr/3EJA202601150007), Dec 18, 2025: Cessna 560XL. STATIC LINE. FAULTED. WE LOST THE CAPTAIN AND FO’S ALTITIMER, ALTITUDE SELECT AT NIGHT IN MOUNTAINOUS TERRAIN. PURGED PILOT AND COPILOT STATIC (N839JS)
- [SDR YENA2025121501201](https://openairdocs.org/sdr/YENA2025121501201), Dec 14, 2025: Airbus BD5001A11. CONTROL PANEL. ODOR. FLT#1007, BOS-BNA. AT FL 360 A STRONG ELECTRICAL ODOR WAS IDENTIFIED. ABOUT 5 MIN LATER SMOKE WAS COMING OUT OF GLARE SH (N3276J)
- [SDR K11A2025120200361](https://openairdocs.org/sdr/K11A2025120200361), Dec 2, 2025: Boeing 7374Q8. CONTROL PANEL. FAULTED. MODE CONTROL PANEL FROZE IN FLIGHT, WITHOUT THE ABILITY TO CHANGE ANY MODE (COURSE) ALT, HLD, SPEED, N1, HDG SEL, LNAV,  (N403CK)
- [SDR CALA2025120211689](https://openairdocs.org/sdr/CALA2025120211689), Nov 27, 2025: Boeing 767322. SWITCH. OUT OF POSITION. AIRSPEED INDICATION ON BOTH CAPT'S AND FO SIDES LIMITED TO 265 KTS PER CREW REPORT. ON ARRIVAL, INSPECTED E&E COMPARTMEN (N665UA)
- [SDR ANCF2025111835](https://openairdocs.org/sdr/ANCF2025111835), Nov 18, 2025: Airbus A320214. GPWS. ABNORMAL. GPWS FAULT AND ALERTING INFLIGHT DURING CLIMB - GPWS AS PER AMM 34-36-31--000-001/400-001 MMR 1 WAS REPLACED OPERATIONAL (N743AV)
- [SDR IPXA2025110741913](https://openairdocs.org/sdr/IPXA2025110741913), Nov 6, 2025: Airbus A300F4622R. FWC. FAULTED. AIR TURN BACK, AFTER TAKEOFF, RECEIVED IAS DISCREPANCY. ALT DISCREPANCY, TAT FAULT & FUEL. AFT TO TRANSFER NOT AVAILABLE (N147UP)
- [SDR CHIA202510229834](https://openairdocs.org/sdr/CHIA202510229834), Oct 21, 2025: Boeing 1072. ENCODER. ARCED. AIRCRAFT RETURNED TO BASE, WITH PILOTS REPORTING A BURNT ELECTRICAL SMELL, AND DIMMED EHSI. INSPECTED EHSI, AND ASSOCIAT (N168CH)
- [SDR VNAA20251015076](https://openairdocs.org/sdr/VNAA20251015076), Oct 17, 2025: Cndair CL6002C10. CLEAT. CORRODED. AV SUPPORT CLEAT ON STR21R AT FS333.00 IS SEVERELY CORRODED. REMOVED AND REPLACED SUPPORT CLEAT IAW CRJ-700 SRM'S 51-42- (N501BG)
- [SDR 2025FA0000760](https://openairdocs.org/sdr/2025FA0000760), Oct 12, 2025: Beech A36. SOLENOID. CORRODED. I MOVED THE GEAR LEVER INTO THE UP POSITION AFTER TAKEOFF IN VFR CONDITIONS. THE PANEL INDICATED A LOW VOLTAGE WARNING T (N366HP)
- [SDR ABXA20250920234](https://openairdocs.org/sdr/ABXA20250920234), Sep 20, 2025: Boeing 767231. MODULE. FAULTED. ON TAXI OUT, WARN ELEX MSG APPEARED AND WAS UNABLE TO RESET. ACFT RETURNED TO THE GATE (BTB) AND MAINTENANCE GROUNDED AC (N650GT)
- [SDR CALA2025090408479](https://openairdocs.org/sdr/CALA2025090408479), Sep 1, 2025: Boeing 7378. ADIRU. FAULTY. LEFT IRS FAULT. UPDATED MAA CODE FIX USING VENDOR MAA SCREEN PLEASE CONTACT TOMC BEFORE COMMENCING ANY WORK. INTERGATED  (N27260)
- [SDR AALA202508181923](https://openairdocs.org/sdr/AALA202508181923), Aug 17, 2025: Airbus A321211. ADIRU. FAULTED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO BOS DUE TO THE FLIGHT CREW REPORTING THAT  (N157UW)
- [SDR FXTA20250815001](https://openairdocs.org/sdr/FXTA20250815001), Aug 13, 2025: Cessna 208B. AHRS. FAULTED. AHRS #1 & 2 FAILED, HEADING RED "X", LOSE OF SYNTHETIC VISION; GRS #1 S/N: 45T003846, GRS #3 S/N: 45T003702, GMU #1 1CM0 (N190BA)
- [SDR 2025F00211](https://openairdocs.org/sdr/2025F00211), Aug 12, 2025: Cessna 208B. GUIDE. MISSING. FOUND G1000 GUIDE MISSING, RETURNED TO GATE AND MX REPLACED (N958SP)
- [SDR SWIA202512090716](https://openairdocs.org/sdr/SWIA202512090716), Jul 16, 2025: Cndair CL6002C11. ANTENNA. CORRODED. ADF ANTENNA HAS CORROSION AROUND FASTENER HOLES. REPAIRED AREA AROUND ADF ANTENNA FASTENER HOLES IAW REO 670-53-31-1065  (N558GJ)
- [SDR SIMA20250714001](https://openairdocs.org/sdr/SIMA20250714001), Jul 14, 2025: Emb ERJ170200LR. MODULE. FAILED. DURING TAKEOFF AND BELOW 80 KNOTS MASTER CAUTIONS GND PROX FAIL, TERRAIN FAIL, AND WINDSHEAR FAIL APPEARED. REJECTED TAK (N279MQ)
- [SDR SIMA20250615001](https://openairdocs.org/sdr/SIMA20250615001), Jun 15, 2025: Emb ERJ170200LR. INDICATION SYS. FAULTED. REJECTED TAKEOFF JUST PAST 80KTS. DURING ROLL ALL TAKEOFF DATA DROPPED OUT. NO BRAKE OVERTEMP PEAK TEMP 398. NO TO DATA  (N217NN)
- [SDR 3EJA2025091701125](https://openairdocs.org/sdr/3EJA2025091701125), Jun 11, 2025: Cessna 680CE. POWER SUPPLY. FAILED. AT CRUISE, 43000’ LEVEL FLIGHT, MAU #1 FAIL ANNUNCIATOR CAME ON. GAINED ACCESS TO MAU. R & R FAULTY POWER SUPPLY WITH IN (N938JS)
- [SDR FXTA20250610001](https://openairdocs.org/sdr/FXTA20250610001), Jun 9, 2025: Cessna 208B. INDICATOR. FAULTED. HEADING INDICATOR RED "X" THEN CAME BACK IN A FEW MINUTES, ALL WHILE ON THE GROUND. SYNTHETIC VERSION ALSO LOST BECAUSE  (N190BA)
- [SDR SCNA20250609202](https://openairdocs.org/sdr/SCNA20250609202), Jun 8, 2025: Boeing 7378. CLAMP. UNSECURE. WORK ORDER 88477, NR00094: DURING GROSS INT. HYD. SYS. LEAKAGE CHECK, WHEN PLACING AMP.-CLAMP IN EMDP RELAY (P92), IT CR (N841SY)
- [SDR CALA2025052905086](https://openairdocs.org/sdr/CALA2025052905086), May 26, 2025: Boeing 777224. INDICATOR. FAULTY. *A/R* DUE TO LOSS OF ALTITUDE AND SPEED READOUTS ON THEIR INTEGRATED STANDBY FLIGHT DISPLAY.ISFD SPEED AND ALTITUDE FLAG (N76010)
- [SDR 454A20250519001](https://openairdocs.org/sdr/454A20250519001), May 19, 2025: Bolkms BK117C2. EFIS. INTERFERENCE. WHILE PASSING OVER A 5G COMMUNICATIONS TOWER, JUST EAST ON HCA KINGWOOD HOSPITAL, KINGWOOD, TX, THE HELICOPTER HAD AN AR (N491HC)
- [SDR AALA202505135812](https://openairdocs.org/sdr/AALA202505135812), May 12, 2025: Airbus A319115. COMPUTER. FAULTED. AIRCRAFT WAS GROUNDED: WHILE MAINTENANCE WAS PERFORMING AVIONICS VENTS RESETS, STRONG BURNING ELECTRICAL SMELL IN FLIGHT (N9015D)
- [SDR CALA2025051204618](https://openairdocs.org/sdr/CALA2025051204618), May 8, 2025: Boeing 757224. SWITCH. OUT OF POSITION. AIRSPEED INDICATORS SHOWING/RED LINING AT 268 KNOTS CREW DEBRIEF REPORTS AIRSPEED INDICATON ON ALL FLIGHT DECK INDICATOR (N17133)

All 692: https://openairdocs.org/jasc/3400/reports.md

## Airworthiness concern sheets (1)

- [AIR760-2019-02-S-3400-ACS](https://openairdocs.org/acs/AIR760-2019-02-S-3400-ACS): ADSB unit. Issued Jul 24, 2019

## Other codes in chapter 34

- [JASC 3410](https://openairdocs.org/jasc/3410): Flight Environment Data (218 reports)
- [JASC 3411](https://openairdocs.org/jasc/3411): Pitot/Static System (1,586 reports)
- [JASC 3412](https://openairdocs.org/jasc/3412): Outside Air Temperature Indicator/Sensor (254 reports)
- [JASC 3413](https://openairdocs.org/jasc/3413): Rate of Climb Indicator (157 reports)
- [JASC 3414](https://openairdocs.org/jasc/3414): Airspeed/Mach Indicator (860 reports)
- [JASC 3415](https://openairdocs.org/jasc/3415): High Speed Warning (39 reports)
- [JASC 3416](https://openairdocs.org/jasc/3416): Altimeter, Barometric/Encoder (1,256 reports)
- [JASC 3417](https://openairdocs.org/jasc/3417): Air Data Computer (1,211 reports)
- [JASC 3418](https://openairdocs.org/jasc/3418): Stall Warning System (1,641 reports)
- [JASC 3420](https://openairdocs.org/jasc/3420): Attitude and Direction Data System (772 reports)
- [JASC 3421](https://openairdocs.org/jasc/3421): Attitude Gyro and Indicating System (1,142 reports)
- [JASC 3422](https://openairdocs.org/jasc/3422): Directional Gyro and Indicating System (649 reports)
- [JASC 3423](https://openairdocs.org/jasc/3423): Magnetic Compass (101 reports)
- [JASC 3424](https://openairdocs.org/jasc/3424): Turn and Bank/Rate of Turn Indicator (153 reports)
- [JASC 3425](https://openairdocs.org/jasc/3425): Integrated Flight System (1,150 reports)
- [JASC 3430](https://openairdocs.org/jasc/3430): Landing and Taxi Aids (56 reports)
- [JASC 3431](https://openairdocs.org/jasc/3431): Localizer/VOR System (129 reports)
- [JASC 3432](https://openairdocs.org/jasc/3432): Glide Slope System (66 reports)
- [JASC 3433](https://openairdocs.org/jasc/3433): Microwave Landing System (26 reports)
- [JASC 3434](https://openairdocs.org/jasc/3434): Marker Beacon System (27 reports)
- [JASC 3435](https://openairdocs.org/jasc/3435): Heads Up Display System (10 reports)
- [JASC 3436](https://openairdocs.org/jasc/3436): Wind Shear Detection System (70 reports)
- [JASC 3440](https://openairdocs.org/jasc/3440): Independent Position Determining System (261 reports)
- [JASC 3441](https://openairdocs.org/jasc/3441): Inertial Guidance System (289 reports)
- [JASC 3442](https://openairdocs.org/jasc/3442): Weather Radar System (3,443 reports)
- [JASC 3443](https://openairdocs.org/jasc/3443): Doppler System (110 reports)
- [JASC 3444](https://openairdocs.org/jasc/3444): Ground Proximity System (553 reports)
- [JASC 3445](https://openairdocs.org/jasc/3445): Air Collision Avoidance System (214 reports)
- [JASC 3446](https://openairdocs.org/jasc/3446): Non Radar Weather System (23 reports)
- [JASC 3450](https://openairdocs.org/jasc/3450): Dependent Position Determining System (106 reports)
- [JASC 3451](https://openairdocs.org/jasc/3451): DME/TACAN System (197 reports)
- [JASC 3452](https://openairdocs.org/jasc/3452): ATC Transponder System (624 reports)
- [JASC 3453](https://openairdocs.org/jasc/3453): Long-Range Navigation (LORAN) System (175 reports)
- [JASC 3454](https://openairdocs.org/jasc/3454): Visual Omnirange (VOR) System (317 reports)
- [JASC 3455](https://openairdocs.org/jasc/3455): Automatic Direction Finder (ADF) System (164 reports)
- [JASC 3456](https://openairdocs.org/jasc/3456): Omega Navigation System (9 reports)
- [JASC 3457](https://openairdocs.org/jasc/3457): Global Positioning System (635 reports)
- [JASC 3460](https://openairdocs.org/jasc/3460): Flight Management Computing Hardware System (4,690 reports)
- [JASC 3461](https://openairdocs.org/jasc/3461): Flight Management Computing Software System (68 reports)
- [JASC 3497](https://openairdocs.org/jasc/3497): Navigation System Wiring (269 reports)

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