# JASC 3497: Navigation System Wiring

- Type: JASC system/component code (FAA)
- ATA chapter: 34 Navigation
- Title in the code table: NAVIGATION SYSTEM WIRING
- Service difficulty reports: 269
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=41
- Page: https://openairdocs.org/jasc/3497

## What it covers

For reports indicating a problem with wiring specific to the Navigation Systems.

## Service difficulty reports (269, newest 50)

- [SDR DXTA2026100509987](https://openairdocs.org/sdr/DXTA2026100509987), Oct 1, 2026: Textrn TEXTRON700. WIRE HARNESS. DEFECTIVE. DURING CLIMB OUT WE RECEIVED A GROUND DETECT FAULT SIX TIMES. SHORTEST CAS MESSAGE WAS 5 SEC WHILE THE LONGEST WAS ABOUT (N837QS)
- [SDR CALA2025122412406](https://openairdocs.org/sdr/CALA2025122412406), Dec 21, 2025: Boeing 737724. CIRCUIT BREAKER. CRACKED. CAPTAIN`S PITOT FAULT LIGHT ILLUMINATED. INITIAL INSPECTION FOUND CIRCUIT BREAKER OPEN. AIR RETURN WHILE PERFORMING VISU (N17753)
- [SDR DALA2025120508917](https://openairdocs.org/sdr/DALA2025120508917), Nov 30, 2025: Boeing 717200. PIN. BROKEN. ATO- APPROX 80KTS DUE TO PREDICTIVE WINDSHEAR WARNING. FOUND COAXIAL CABLE PIN BROKEN. REPLACED SAME. OPS NORMAL.(795215 (N993AT)
- [SDR DXTA2025050203304](https://openairdocs.org/sdr/DXTA2025050203304), Apr 30, 2025: Bombdr BD7001A10. WIRE HARNESS. FAULTED. AIR DATA COMPUTER: AFTER TAKEOFF WINDSHEAR ON THE PFD DISPLAYED FOLLOWED BY AUTO THROTTLES OFF AND THE AUTO PILOT WOULD  (N163QS)
- [SDR 2025FA0000089](https://openairdocs.org/sdr/2025FA0000089), Feb 3, 2025: Cndair CL6002B19. WIRE. DAMAGED. QRF CBB-CBB- STALL FAIL. REPAIRED WIRE ON P5CG PLUG MOTO SHAKER CAP SIDE IAW AMM 20-10-00/201 AND WDM 27-35-00. ON TEST  (N418AW)
- [SDR DXTA2025012202025](https://openairdocs.org/sdr/DXTA2025012202025), Jan 19, 2025: Cessna 680A. CONTACTOR. DEFECTIVE. AVIONICS POWER: RIGHT AVIONICS FELL OFF-LINE. UNABLE TO RE-SELECT RIGHT AVIONICS ON. CORRECTIVE ACTION: REPLACED R AVION (N918QS)
- [SDR UIEA2025011000012](https://openairdocs.org/sdr/UIEA2025011000012), Jan 15, 2025: Boeing 76738E. CONNECTOR. CORRODED. UPPER HALF OF FUSELAGE, TOP TCAS ANTENNA, FOUR CONNECTORS, WITH CORROSION.(<P>CONNECTORS WERE CLEANED AS CLIENT REQUIREM (N641GT)
- [SDR AALA202412238643](https://openairdocs.org/sdr/AALA202412238643), Dec 20, 2024: Boeing 737823. ELEC CONNECTOR. DAMAGED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AT FL370 THE CAPT PITOT LIGHT ILLUMINATED; AIRCRAFT DIVERTED TO (N890NN)
- [SDR HYIA20241003002](https://openairdocs.org/sdr/HYIA20241003002), Sep 26, 2024: Tecnam P2012. CONNECTOR. BURNED. PILOT REPORTED STALL HEAT CASS MESSAGE DOES NOT TURN OFF WHEN SWITCH IS TURNED ON. MAINTENANCE INSPECTED AND FOUND STALL (N288CA)
- [SDR AALA202409132572](https://openairdocs.org/sdr/AALA202409132572), Sep 12, 2024: Boeing 737823. CONNECTOR. DAMAGED. AIRCRAFT WAS GROUNDED: REPEAT ITEM, LANDING GEAR WARNING HORN SOUNDED ON DESCENT PASSING 11,000' WITH GEAR UP AND HANDLE (N895NN)
- [SDR DALA2024062006274](https://openairdocs.org/sdr/DALA2024062006274), Jun 19, 2024: Boeing 757232. CONNECTOR. NOT SEATED. SHIP 6712 -ATB/DE- DUE TO STALL WARNING STICK SHAKERS GOING OFF ON CLIMB. CORRECTIVE ACTION: FOUND PIN ON TB203 Z110 NOT (N6712B)
- [SDR CALA2024061700006](https://openairdocs.org/sdr/CALA2024061700006), Jun 17, 2024: Boeing 7378. CONTACT. WRONG PART. REF LP 8301672. WHEN REPLACING MMR1 FOUND PUSHED BACK PIN IN MMR1 BENCHPLUG CONN D10719B POS B8. REF SSM 34-58-11 PIN IS (N17265)
- [SDR CALA2024061701821](https://openairdocs.org/sdr/CALA2024061701821), Jun 13, 2024: Airbus A320232. CONNECTOR. DISCONNECTED. ERRONEOUS OVERSPEED WARNING DURING FLAP RETRACTION VMO WARNING AFTE R THAT PER CREW VERBAL WAS BELOW OVERSPEED BY 6 KNOT (N430UA)
- [SDR CALA2024052401570](https://openairdocs.org/sdr/CALA2024052401570), May 21, 2024: Boeing 767322. PCB. MALFUNCTIONED. CREW REPORTS LOW SPEED AMBER BAND ON CAPTAINS SIDE EFIS AIRSPEED TAPE FLUCTUATING AND 30KT SPLIT WITH FO. ALL MACH AIRSP (N659UA)
- [SDR YENA2024041600570](https://openairdocs.org/sdr/YENA2024041600570), Apr 11, 2024: Emb ERJ190100IGW. CABLE. DAMAGED. DURING HEAVY MAINTENANCE: CABIN SYSTEMS - GPS ANTENNA CABLE P/N N31201-103, RETERMINATION- DEVIATION FROM APPROVED DATA  (N249JB)
- [SDR HNAA2024010400003](https://openairdocs.org/sdr/HNAA2024010400003), Jan 3, 2024: Emb EMB145LR. UNKNOWN. UNKNOWN. CA MFD INTERMITTENT IN FLIGHT. ABLE TO DUPLICATE PROBLEM BY TAPPING ON LIGHT CONTROL PANEL. FOUND BROKEN WIRE IN MFD DIM (N686AE)
- [SDR UIEA2023123001048](https://openairdocs.org/sdr/UIEA2023123001048), Dec 29, 2023: Boeing 74748EF. CABLE. UNKNOWN. AIR TURN BACK. CAPTAIN'S LOCALIZER INOP, RIGHT HAND ILS ON DEFFERAL(<P>REMOVED &AMP; REPLACED RIGHT HAND ILS COAX CABLE  (N419MC)
- [SDR 2023FA0000814](https://openairdocs.org/sdr/2023FA0000814), Nov 25, 2023: Bolkms BK117C2. UNKNOWN. UNKNOWN. PILOT PFD AND ND WENT BLANK WITH AHRS INDICATION. CLEANED CONNECTOR PLUG GOING INTO MODE SELECT PANEL COULD NOT DUPLICAT (N240SF)
- [SDR HNAA2023110700372](https://openairdocs.org/sdr/HNAA2023110700372), Nov 6, 2023: Emb EMB145LR. UNKNOWN. UNKNOWN. WINDSHEAR INOP, EGPWS INOP WITH RAD ALT FAIL MSG IN FLIGHT PERFORMED GVIOF GROUND STUD GSO383. CHECKS GOOD R/RD CONNECTO (N935AE)
- [SDR 2023FA0000350](https://openairdocs.org/sdr/2023FA0000350), Jul 3, 2023: Gulstm GIVXG450. COAX. DEFECTIVE. REF: FA25221 - GIV-SP 1305 TRANSPONDER UNSERVICEABLE BARCELONA TOWER COULD NOT SEE N44GV ON THEIR GROUND SURVEILLANCE RA (N44GV)
- [SDR ABXA2021083029078](https://openairdocs.org/sdr/ABXA2021083029078), Aug 29, 2021: Boeing 767281. CONNECTOR. BURNED. AIR TURN BACK CREW REPORTED SMOKE IN THE COCKPIT.EMERGENCY DECLARED. AIRCRAFT LANDED UNEVENTFULLY AND WAS GROUNDED BY MA (N774AX)
- [SDR MTNA20210616001](https://openairdocs.org/sdr/MTNA20210616001), Jun 16, 2021: Cessna 208B. WIRE. CHAFED. SMOKE SMELL AND VISUAL SMOKE INSIDE WINDSHIELD OCCURRED ON TAKEOFF. FOUND LIQUID COMPASS BACK LIGHTING WIRE CHAFED AT GL (N848FE)
- [SDR UIEA2021040900863](https://openairdocs.org/sdr/UIEA2021040900863), Apr 8, 2021: Boeing 767306. CONNECTOR. DISCONNECTED. WX RADAR FAILED(<P>PERFORMED WXR BITE IAW FIM 34-43 FT 805. FOUND CONNECTOR D395 DISCONNECTED. RECONNECTED CANNON PLUG I (N1399A)
- [SDR UIEA2021030200448](https://openairdocs.org/sdr/UIEA2021030200448), Mar 2, 2021: Boeing 76731B. CONNECTOR. CONTAMINATED. DURING INITIAL CLIMB RADAR ANT FAULT OCCURED APROX 30 MIN IN CRUISE. ANT FAULT WENT AWAY BOTH SYS L &AMP; R.(<P>PER FIM  (N1361A)
- [SDR HNAA2020111200324](https://openairdocs.org/sdr/HNAA2020111200324), Nov 10, 2020: Emb EMB145LR. WIRE. BURNED. FOUND BURNED/CHAFED WIRE AT NR 3 PITOT/STATIC HEATING CONNECTION ON PITOT/STATIC PORT. AFTER REPAIR, PERFORM FCD1-30-16- (N647AE)
- [SDR JGVR20200915001](https://openairdocs.org/sdr/JGVR20200915001), Sep 15, 2020: Emb EMB545. WIRE. SHORTED. ON TAXI IN, CYAN FLT CNTRL FAULT ILLUMINATED ALONG WITH CYAN REMOTE C/B TRIP. WE WERE ABLE TO RESET THE TRIPPED C/B REU5 (N423FX)
- [SDR CALA2020032000643](https://openairdocs.org/sdr/CALA2020032000643), Mar 13, 2020: Boeing 767322. CONNECTOR. BROKEN. PER CREW: MINIMUM MANEUVERING SPEED BAR ON CAPT AND FO EHSI''S FLUCTUATES DURING FLT FROM 0 TO 300KTS. SWITCHING TO ALT  (N660UA)
- [SDR SWIA2019122747391](https://openairdocs.org/sdr/SWIA2019122747391), Nov 6, 2019: Cndair CL6002B19. CONNECTOR. CRACKED. COCKPIT ACCESS PANEL 221NZ HAS CRACKED COVER. (C-CHECK) RO:12/24/2019 ORDERED/RECEIVED 1EA CANNON PLUG SHIELD. REFER TO  (N435SW)
- [SDR UIEA2019082645275](https://openairdocs.org/sdr/UIEA2019082645275), Aug 24, 2019: Boeing 76737D. PIN. DAMAGED. R WXR SYS FAIL, WXR STATUS MESSAGE. FOUND PUSHED PIN ON RELAY K9201. RESET AND LOCKED THE PIN BACK ON THE RELAY 9201 IAW (N1327A)
- [SDR UIEA2019081605196](https://openairdocs.org/sdr/UIEA2019081605196), Aug 16, 2019: Boeing 767306. CONNECTOR. DAMAGED. RIGHT SYS RADAR DISPLAYS ATT DISAGREE LEFT SYS ON OK. PERFORMED R WXR TEST IAW FIM 34-43 F/T 805. WXR FAIL ATT. SWAPPED  (N1427A)
- [SDR CA190517011](https://openairdocs.org/sdr/CA190517011), May 16, 2019: Cndair CL6002C10. WIRE. ABNORMAL. (CAN) ON A MODSUM THAT MODIFIES THE LH AND RH REVERSIONARY PANELS, ONE OF THE WIRES HAS A SMALLER GAUGE SIZE. THE WIRE H
- [SDR UIEA2019051304193](https://openairdocs.org/sdr/UIEA2019051304193), May 11, 2019: Boeing 76731K. WIRE HARNESS. CONTAMINATED. RADOME, RADAR WIRE BUNDLES HAVE WATER INSIDE PROTECTIVE SLEEVES(<P>CLEANED AND REPAIRED WEATHER RADAR HARNESSES D491P AN (N1373A)
- [SDR UIEA2019022103299](https://openairdocs.org/sdr/UIEA2019022103299), Feb 21, 2019: Boeing 76737D. WIRE. CROSSED. "WXR DSPY" FAULT ON FO HIST WHEN WXR PWR SELECTED.(<P>T/S TO R EFIS SYM GENERATOR. TRANSFER TO MDDR 107661 MEL 34-22-05B (N1327A)
- [SDR E07A201902270002](https://openairdocs.org/sdr/E07A201902270002), Feb 4, 2019: Cessna 750. WIRE. CHAFED. STANDBY INSTRUMENT INOP. FOUND WIRING IN TAIL GOING TO MAGNETOMETER TO BE CHAFFING ON LIGHTING HOLE. WILL SUBMIT PICTURE (N817WH)
- [SDR SIMA201808165003](https://openairdocs.org/sdr/SIMA201808165003), Aug 15, 2018: Emb EMB135KL. CONNECTOR. DIRTY. RADAR FAILED. REMOVED AND CLEANED THE CONNECTOR PLUG. RESET UNIT. OPS CHECKED GOOD IAW 34-42-00. (N833AE)
- [SDR UIEA2018070901404](https://openairdocs.org/sdr/UIEA2018070901404), Jul 9, 2018: Boeing 76731B. WIRE. DAMAGED. SHORTLY AFTER TAKEOFF LEFT WEATHER RADAR FAILED. PERFORMED REPAIR OF WIRE W781-004-20 AND W781-005-20 IAW WDM 34-43-12 & (N1361A)
- [SDR 2A6R201862200001](https://openairdocs.org/sdr/2A6R201862200001), Jun 22, 2018: Snias AS350B3. WIRE HARNESS. UNSECURE. CHAFING FOUND DURING VISUAL INSPECTION CREATED BY ANTENNA WIRE BUNDLE RUBBING AGAINST THE SKIN OF THE TAIL BOOM FORWARD  (N4497Y)
- [SDR DALA2018062204159](https://openairdocs.org/sdr/DALA2018062204159), Jun 21, 2018: Boeing 767332. CIRCUIT BREAKER. FAILED. RETURNED TO DEPARTURE, DUE TO THE FIRST OFFICER MACH AIRSPEED INDICATOR FAILURE. REPLACED THE C581 CIRCUIT BREAKER, RIGH (N1604R)
- [SDR UIEA2018061701166](https://openairdocs.org/sdr/UIEA2018061701166), Apr 17, 2018: Boeing 767383. PIN. NOT SEATED. LEFT WEATHER RADAR FAILED IN FLIGHT. FOUND CONNECTOR D4917P AT PRESSURE BULKHEAD STA 132.5 PIN 39 PUSHED IN AND UNLOCKED (N1511A)
- [SDR DALA2017122608876](https://openairdocs.org/sdr/DALA2017122608876), Dec 25, 2017: Doug MD88. WIRE. BROKEN. EMERGENCY NAV INSTRUMENT CIRCUIT BREAKER TRIPPED. NO RESET. FOUND A WIRE 1F700A24 BROKEN AND ARCING. REPAIRED THE WIRE I (N907DE)
- [SDR 2017F00207](https://openairdocs.org/sdr/2017F00207), Dec 19, 2017: Cessna 208B. COUPLER. CORRODED. UPON APPROACH ON FINAL TO LAND, PILOT NOTICED THE AIRCRAFT WAS APPROXIMATELY 1 MILE EAST OF THE RUNWAY. PILOT PERFORMED  (N3910F)
- [SDR UIEA2017102502055](https://openairdocs.org/sdr/UIEA2017102502055), Oct 25, 2017: Boeing 767375. WIRE. BROKEN. RIGHT AIR DATA COMPUTER DOES NOT PASS FUNCTIONAL TEST. FAULT CODES 8 AND 7 SHOW IN THE EXTERIOR SENSOR FAULT DISPLAY VIC (N649GT)
- [SDR UIEA2017102101990](https://openairdocs.org/sdr/UIEA2017102101990), Oct 21, 2017: Boeing 767324. CONNECTOR. DIRTY. INTERMITTENT RADAR FAILURE MESSAGE. REMOVED THE NR 1 WEATHER RADAR TRANSCEIVER AND CLEANED CONNECTORS. REINSTALLED AND C (N645GT)
- [SDR UIEA2017092201802](https://openairdocs.org/sdr/UIEA2017092201802), Sep 22, 2017: Boeing 767277. CONNECTOR. DAMAGED. FIRST OFFICER`S PITOT PROBE FOUND MISSING BACK SHELL. REMOVED AND REPLACED THE CONNECTOR IAW SWPM 20-61-00. OPS CHECKED  (N767MW)
- [SDR UIEA2017092501810](https://openairdocs.org/sdr/UIEA2017092501810), Sep 22, 2017: Boeing 767277. CONNECTOR. CONTAMINATED. CAPTAIN`S PITOT PROBE HAD CONTAMINATION. REMOVED AND REPLACED BACKSHELL ON CAPT PITOT PROBE CONNECTOR IAW SWPM 20-61-00, (N767MW)
- [SDR Z1RA2017082100008](https://openairdocs.org/sdr/Z1RA2017082100008), Aug 18, 2017: Skrsky S76D. WIRE. BROKEN. NR 2 MCDU FAILURE LIGHT ON POWER UP. LOCATED BROKEN WIRE AT CONNECTOR PLUG P180R PIN 39, MCDU HEALTH DISCREET TO VMM P10 (N760AF)
- [SDR O2GA2017080285601](https://openairdocs.org/sdr/O2GA2017080285601), Jul 27, 2017: Beech B300. COMPUTER. DEFECTIVE. FLIGHT GUIDANCE COMPUTER CIRCUIT BREAKER EXTENDED IN FLIGHT FOLLOWED BY ELECTRICAL-SMOKE ODOR. DIVERTED, UNEVENTFUL. FGC (N856UP)
- [SDR HALA2017071900196](https://openairdocs.org/sdr/HALA2017071900196), Jul 18, 2017: Boeing 7673CB. CONNECTOR. NOT SEATED. ISFD SPEED & ALTITUDE DISPLAY INOP. RESET CONNECTOR, OPS CK GOOD. (N590HA)
- [SDR 2017FA0000242](https://openairdocs.org/sdr/2017FA0000242), Jun 12, 2017: Cessna 206H. CONNECTOR. BURNED. SECONDARY FLIGHT DISPLAY INOPERATIVE. PRELIMINARY INSPECTION FOUND THE NR 2 ELECTRICAL BUSS INOPERATIVE, INCLUDING THE D (N332SC)
- [SDR ASAA2017060921014](https://openairdocs.org/sdr/ASAA2017060921014), Jun 9, 2017: Boeing 737890. CONNECTOR. UNSECURE. EXPERIENCED MULTIPLE INTERMITTENT WEATHER RADAR FAILURES ENROUTE. BOTH THE CAPTAIN`S & FIRST OFFICER`S RADAR DISPLAYS WO (N506AS)

All 269: https://openairdocs.org/jasc/3497/reports.md

## Other codes in chapter 34

- [JASC 3400](https://openairdocs.org/jasc/3400): Navigation System (692 reports)
- [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 (1,210 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 (1,148 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 (3,442 reports)
- [JASC 3443](https://openairdocs.org/jasc/3443): Doppler System (110 reports)
- [JASC 3444](https://openairdocs.org/jasc/3444): Ground Proximity System (552 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)

---
From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.
