# JASC 3450: Dependent Position Determining System

- Type: JASC system/component code (FAA)
- ATA chapter: 34 Navigation
- Title in the code table: DEPENDENT POSITION DETERMINING SYS
- Service difficulty reports: 106
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=40
- Page: https://openairdocs.org/jasc/3450

## What it covers

The system which provides information to determine position and is mainly dependent on ground installations. Use this code for reports of a general nature or for those with insufficient information to file in a more specific JASC code identified in JASC codes 3451 through 3457.

## Service difficulty reports (106, newest 50)

- [SDR YENA2026050700450](https://openairdocs.org/sdr/YENA2026050700450), May 6, 2026: Airbus A320232. TRANSPONDER. FAILED. FLT# 754, SJU-FLL. (AIRCRAFT RTF TO SJU, AN EMERGENCY WAS DECLARED) "AFTER TAKEOFF WE RECIEVED AN ECAM FOR TRANSPONDER 2 (N605JB)
- [SDR YENA2024101801370](https://openairdocs.org/sdr/YENA2024101801370), Oct 16, 2024: Airbus A321271N. TRANSPONDER. FAULTED. FLT#1621, LHR-BOS. 'NAV ATC/XPDR 2 FAULT ON CLIMBOUT; PERFORMED OPS CHECK OF THE ATC 2 IAW 34-52-00 OPS CHECKS GOOD.' (N4064J)
- [SDR YENA2023111701400](https://openairdocs.org/sdr/YENA2023111701400), Nov 14, 2023: Airbus A320232. UNKNOWN. UNKNOWN. FLT#627, JFK-POP. (AIRCRAFT DIVERTED TO FLL) ' NAV ADS-B RPTG 1 FAULT ON ECAM. ADS-B RPTG 2 FAULT ON ECAM. FAULT INTERMI (N623JB)
- [SDR 9JLA2023041322997](https://openairdocs.org/sdr/9JLA2023041322997), Apr 10, 2023: Gulstm GIV. ANTENNA. FAILED. FLIGHT CREW REPORTED THE ADSB SYSTEM WAS INTERMITTENT. THE MAINTENANCE BASE TROUBLESHOT AND FOUND THE ADSB ANTENNA AT FA (N120SB)
- [SDR YENA2022110801098](https://openairdocs.org/sdr/YENA2022110801098), Nov 3, 2022: Airbus A300*. NONE. NONE. FLT#2186, PIT-BOS. 'DEPARTING PIT WITH A CLEARANCE TO CLIMB AND MAINTAIN 5000', PASSING BETWEEN 4000' AND 4300', THE FO  (N3104J)
- [SDR ASAA2022070839003](https://openairdocs.org/sdr/ASAA2022070839003), Jul 8, 2022: Boeing 737990ER. ANTENNA. BROKEN. # 1 DME ANTENNA BROKE IN HALF. GROUNDED - YES. #1 DME ANTENNA BROKE AND PART DEPARTED AIRCRAFT. PERFORMED CONDITIONAL IN (N469AS)
- [SDR YENA2022052700531](https://openairdocs.org/sdr/YENA2022052700531), May 22, 2022: Airbus A320232. GPS. INACCURATE. FLT#1818, POS-FLL. ' BOTH GPS PRIMARY LOST ON ND DISPLAY. ATC ADVISED WE WERE 70 MILES OFF COURSE. UPON SHUTDOWN I FLL G (N579JB)
- [SDR ASAA2021092536122](https://openairdocs.org/sdr/ASAA2021092536122), Sep 25, 2021: Boeing 737890. COMPUTER. FAULTY. PSEU LIGHT ILLUMINATED AFTER LANDING AND REMAINED ILLUMINATED FOR A FEW MINUTES - LIGHT EXTINGUISHED. GROUNDED - YES. CO (N590AS)
- [SDR UIEA2021071501554](https://openairdocs.org/sdr/UIEA2021071501554), Jul 14, 2021: Boeing 76738E. WARNING MESSAGE. FALSE ACTIVATION. FWD EQPT OVHT ON T/O. RAN QRH, COOLED DOWN. EICAS CLEARED.(<P>T/S PER FIM 21-58 TREE 909, NO FAULTS NOTED. SYSTEM CHECK  (N641GT)
- [SDR ASAA2021052634937](https://openairdocs.org/sdr/ASAA2021052634937), May 26, 2021: Boeing 737890. WARNING MESSAGE. FALSE ACTIVATION. INTERMITTENT "GPS- INVALID" SCRATCH PAD MESSAGE APPEARED ALONE AND SEEMINGLY ASSOCIATED WITH INVALID MSG. CPDLC DURING T (N577AS)
- [SDR ASAA2021010133804](https://openairdocs.org/sdr/ASAA2021010133804), Jan 1, 2021: Boeing 737990ER. RECEIVER. FAULTED. GPS L & R INVALID AND MESSAGE FOLLOWED BY GPS & IRS LIGHT. IRS LIGHT WENT OUT UPON MASTER CAUTION RECALL. GROUNDED-YES.  (N472AS)
- [SDR AALA201905099027](https://openairdocs.org/sdr/AALA201905099027), May 7, 2019: Boeing 737823. CONTROL PANEL. FAILED. AIRCRAFT WAS GROUNDED: PILOT REPORTS 1:44 INTO FLIGHT @ FL 380 RECIEVED RA AT 380 INDICATED ON ND AT AIRCRAFT NOSE, CLIM (N808NN)
- [SDR UIEA2018060701070](https://openairdocs.org/sdr/UIEA2018060701070), Jun 7, 2018: Boeing 76738E. BATTERY PACK. INOPERATIVE. AFT RIGHT EXTERNAL ESCAPE HATCH EMERGENCY SLIDE LIGHT INOPERATIVE. TROUBLESHOT IAW FIM 33-51, FOUND THE BATTERY PACK M73 (N641GT)
- [SDR IXXA20180119002](https://openairdocs.org/sdr/IXXA20180119002), Jan 15, 2018: Boeing 767232. INTERROGATOR. INOPERATIVE. CREW REPORTED WHEN EXTERNAL POWER IS CONNECTED, SMOKE AND FUMES FILL THE COCKPIT. REMOVED AND REPLACED RIGHT DME IAW AMM (N739AX)
- [SDR HALA2016071900284](https://openairdocs.org/sdr/HALA2016071900284), Jul 19, 2016: Boeing 76733A. IRU. WARNING MESSAGE. CENTER IRS FAULT MESSAGE ILLUMINATED AFTER LANDING. REPLACED CENTER IRU IAW AMM 34-21-01 AND PERFORMED MCDU TEST 30 & 40 (N582HA)
- [SDR MASA2015122612660](https://openairdocs.org/sdr/MASA2015122612660), Dec 26, 2015: Cndair CL6002C10. ADC. INTERMITTENT. LOST BOTH NAV VOR INTERMITTENTLY. REPLACED NR 1 ADC. (N505MJ)
- [SDR HALA2015082600173](https://openairdocs.org/sdr/HALA2015082600173), Aug 26, 2015: Boeing 76733A. IRS. OUT OF ALIGNMENT. CENTER IRS FAULT ON LANDING. ALIGNED CENTER IRS IAW 34-21-00-875-003. OPS CHECKED GOOD, NO FAULTS NOTED OK FOR SERVICE. (N580HA)
- [SDR CA150527008](https://openairdocs.org/sdr/CA150527008), May 19, 2015: Bombdr DHC8400. PROCESSOR. MALFUNCTIONED. (CAN) SHORTLY AFTER LEVELING OFF IN THE CRUISE AT FL 240, 18 MINUTES IN TO THE FLIGHT, THE CAPTAIN`S PFD DISPLAYED IAS F
- [SDR SIMA20141002007](https://openairdocs.org/sdr/SIMA20141002007), Oct 2, 2014: Emb EMB145LR. UNKNOWN. FAILED. TAKEOFF ABORTED AT 70 - 80 KNOTS DUE TO MASTER WARNING & MASTER CAUTION & SPS ADVANCED GPWS INOPERATIVE SPS 1 & 2. STALL (N671AE)
- [SDR ASAA2014082008904](https://openairdocs.org/sdr/ASAA2014082008904), Aug 20, 2014: Boeing 737990ER. RECEIVER. FAILED. TURNED ON ADF & RECEIVED AN ELECTRICAL BURNING ODOR AND THE POWER WENT OUT RIGHT AWAY ON RADIO. SELECTED OFF ON ADF AND  (N409AS)
- [SDR ASMF201406002](https://openairdocs.org/sdr/ASMF201406002), Apr 8, 2014: Boeing 737752. BONDING JUMPER. DEFECTIVE. AIRCRAFT RETURNED OF FLIGHT DUE TO DURING CLIMB, BOTH FAIL FLAGS NAV CONTROL DISPLAYS WERE SHOWN. PERFORMED RESET TO RUP (N784XA)
- [SDR ASAA2014012212458](https://openairdocs.org/sdr/ASAA2014012212458), Jan 22, 2014: Boeing 737990ER. INDICATION SYS. FALSE INDICATION. 10 MINUTES PRIOR TO PUSH APU MAINT LIGHT ILLUMINATED. ACFT GROUNDED. INTERROGATED CDU FOUND MESSAGE 49-91227 LOW OIL QUA (N435AS)
- [SDR QXEA2013122401560](https://openairdocs.org/sdr/QXEA2013122401560), Dec 24, 2013: Bombdr DHC8402. ANTENNA. MALFUNCTIONED. ERRATIC INDICATIONS ON BOTH PFDS DURING APPROACH. FLIGHT GUIDANCE INDICATED A RT TURN WHEN LOC NEEDLE WAS MOVING LT. LOC (N418QX)
- [SDR IPXA2013122301095](https://openairdocs.org/sdr/IPXA2013122301095), Dec 19, 2013: Boeing 75724APF. LAMP. INOPERATIVE. LAMPS BURNED OUT ON VOR NR 2 AUTO-MANUAL SWITCH. REPLACED LAMPS IN FLT. PUSHED SWITCH IN, AND A PUFF OF SMOKE. PULLED SW (N459UP)
- [SDR ASMF2013110800008](https://openairdocs.org/sdr/ASMF2013110800008), Oct 15, 2013: Boeing 737800*. RECEIVER. FAILED. ACFT RETURNED OF FLIGHT DUE TO EICAS MESSAGE FRM’S 342 - 440-00, 345 - 030-02, 345 - 050-02 AND 345 - 060-02. MAINTENANC (N359AM)
- [SDR REXA2013082201606](https://openairdocs.org/sdr/REXA2013082201606), Aug 22, 2013: Cndair CL6002B19. TRANSPONDER. INOPERATIVE. NR 2 TRANSPONDER IS INOPERATIVE. (N8412F)
- [SDR REXA2013053101059](https://openairdocs.org/sdr/REXA2013053101059), May 31, 2013: Cndair CL6002B19. UNKNOWN. MALFUNCTIONED. ON APPROACH BOTH PILOT PFD'S WAS INTERMITTENTLY LOSING LOCALIZER & G SLOPE 5 TIMES ON 20 MILE FINAL TO LANDING. COULD NO (N8808H)
- [SDR CA130301009](https://openairdocs.org/sdr/CA130301009), Jan 18, 2013: Pilats PC1247E. AHRS. FAILED. (CAN) DURING ENGINE GROUND RUN, RN 1 AND 2 HEADING SPLIT 70 DEGREES AND ADAHRS HDG MISCOMPARE FLAG CAME ON. HEADING CAME
- [SDR CALA2012062700417](https://openairdocs.org/sdr/CALA2012062700417), Jun 27, 2012: Boeing 757224. WARNING MESSAGE. FALSE ACTIVATION. EICAS MESSAGES C IRS FAULT AND RT IRS FAULT ILLUMINATED PERFORMED INERTIAL REF SYS BITE CHECK IAW AMM 34-21-00-715-04. 4 (N41140)
- [SDR VNAA2011061400008](https://openairdocs.org/sdr/VNAA2011061400008), Jun 8, 2011: Cndair CL6002B19. CIRCUIT CARD. FAILED. CREW REPORTED LOST FMS, THEN LOST NAV 1 IN FLIGHT EN ROUTE FROM DCA TO TYS. CREW DIVERTED TO IAD AND LANDED WITHOUT INCI (N249PS)
- [SDR COEA2011032803911](https://openairdocs.org/sdr/COEA2011032803911), Mar 28, 2011: Aerosp ATR42300. RECEIVER. MALFUNCTIONED. ON FLIGHT 8216 WHILE EN ROUTE FROM SIT TO KTN THE NR 2 NAV BECAME INOP. IT WAS DECIDED TO OVERFLY KTN AND CONTINUE TO SE (N911FX)
- [SDR 2011FA0000312](https://openairdocs.org/sdr/2011FA0000312), Mar 24, 2011: Cirrus SR22. ANTENNA. NOISY. DIGITAL DATA NOISE IN HEADSETS. ACFT MODE S TRANSPONDER SYS. CURRENT ANTENNA LOCATION IS TOO CLOSE TO CABIN ENVIRONMENT. (N289CM)
- [SDR QXEA2009021800128](https://openairdocs.org/sdr/QXEA2009021800128), Feb 16, 2009: Cndair CL6002C10. ANTENNA. CORRODED. PDX - THE TCAS OMNI DIRECTIONAL ANTENNA HAS PITTING CORROSION ON THE BASE. REPLACED THE ANTENNA. OPERATIONAL CHECKS GOOD (N618QX)
- [SDR HNAA2008122200359](https://openairdocs.org/sdr/HNAA2008122200359), Dec 17, 2008: Dhav DHC8102. RECEIVER. FAILED. NUMBER ONE NAVIGATION RADIO FAILED IN FLIGHT, CONTROL HEAD DISPLAY WENT BLANK AND NAVIGATION FLAG SHOWING. REMOVED AND R (N931HA)
- [SDR TRAX200800111](https://openairdocs.org/sdr/TRAX200800111), Jan 19, 2008: Cndair CL6002B19. WARNING MESSAGE. FALSE INDICATION. RECEIVED MULTIPLE EFIS COMP MON ON TAXI AND TAKEOFF. AT 12000 LOST FMS, AHRS; UNABLE TO FLY GREEN NEEDLES FOR 10 MINS. A (N878AS)
- [SDR QXEA200701232](https://openairdocs.org/sdr/QXEA200701232), Aug 3, 2007: Bombdr DHC8402. TRANSPONDER. UNKNOWN. PDX FLIGHT NR 2309: ATC UNABLE TO PICK UP TRANSPONDERS. IT WAS ON STANDBY AND UNABLE TO CYCLE ON ALT. TRIED BOTH CHANNEL (N413QX)
- [SDR 753002](https://openairdocs.org/sdr/753002), Jul 18, 2007: Boeing 747228F. INU. FAILED. TAKEOFF REJECTED AT 120 KNOTS AT RKSI, DUE TO NR 1 INS FAIL WARNING AND CAPTAIN'S ATTITUDE INSTRUMENT FAIL WARNING. REMO (N753SA)
- [SDR MASA200601018](https://openairdocs.org/sdr/MASA200601018), Apr 5, 2006: Cndair CL6002B19. STATUS MESSAGE. ILLUMINATED. ASH 7107 IAD - FLIGHT SPOILER FAULT STATUS MESSAGE AND YAW DAMP 1 INOP STATUS MESSAGE. MAINTENANCE COULD NOT DUPLICATE. (N77181)
- [SDR MALA060146](https://openairdocs.org/sdr/MALA060146), Mar 13, 2006: Saab 340B. TRANSPONDER. MALFUNCTIONED. SECOND DIGIT OF TRANSPONDER CODE IS BEING RECEIVED FOUR HIGHER THAN IS DISPLAYED ON UNIT. REMOVED AND REPLACED NR 1 TRAN (N402XJ)
- [SDR MALA060144](https://openairdocs.org/sdr/MALA060144), Mar 13, 2006: Saab 340B. CONTROL HEAD. MALFUNCTIONED. SECOND DIGIT OF TRANSPONDER CODE IS BEING RECEIVED FOUR HIGHER THAN IS DISPLAYED ON UNIT. REMOVED AND REPLACED CONTROL H (N402XJ)
- [SDR MALA060147](https://openairdocs.org/sdr/MALA060147), Mar 13, 2006: Saab 340B. TRANSPONDER. MALFUNCTIONED. SECOND DIGIT OF TRANSPONDER CODE IS BEING RECEIVED FOUR HIGHER THAN IS DISPLAYED ON UNIT. REMOVED AND REPLACED NR 2 TRAN (N402XJ)
- [SDR MASA200600026](https://openairdocs.org/sdr/MASA200600026), Jan 10, 2006: Cndair CL600*. TRANSCEIVER. MALFUNCTIONED. ASH 6336 PHX - GEAR UP UNSAFE MSG/GLD UNSAFE. R2 NR 1 DME AND GEAR SWING. OPS CHECK GOOD. (N907FJ)
- [SDR MALA040468](https://openairdocs.org/sdr/MALA040468), Jun 17, 2004: Saab 340B. RECEIVER. ODOR. ELECTRICAL BURNING ODOR IN COCKPIT GOES AWAY WHEN NAV 1 IS TURNED OFF. MAINTENANCE INSPECTED COCKPIT AND AVIONICS RACK F (N429XJ)
- [SDR MALA040467](https://openairdocs.org/sdr/MALA040467), Jun 16, 2004: Saab 340B. RECEIVER. ODOR. AFTER STARTING RT ENGINE ODOR OF SMOKE NOTED IN COCKPIT AND FWD SECTION OF CABIN, NO VISUAL SMOKE NOTED, ODOR WAS MORE I (N429XJ)
- [SDR DL76L040297](https://openairdocs.org/sdr/DL76L040297), Apr 2, 2004: Boeing 767332. IRU. OUT OF ADJUST. FMC WAS NOT PROVIDING GOOD NAV ORIENTATION IMMEDIATELY AFTER T/O. ALL DATA WAS OFF BY APPROX 300 MILES. UPON LANDING AT  (N184DN)
- [SDR CA030919003](https://openairdocs.org/sdr/CA030919003), Sep 7, 2003: Boeing 767375. CONTROL PANEL. MALFUNCTIONED. (CAN) A/C HAD A DUAL ATC FAILURE AFTER DEPARTURE LHR. UK ATC WOULD NOT LET THE A/C PROCEED SO RETURNED TO LHR. OVERWEIGH
- [SDR 234TR0007](https://openairdocs.org/sdr/234TR0007), Jul 25, 2003: Boeing 737228. INDICATOR. MALFUNCTIONED. FIRST OFFICER'S HSI - VOR FROM, ILS VALID, VOR VALID, FLAG ERRONEOUS. REPLACED HSI. ALL FUNCTIONS OPERATE NORMAL. (N234TR)
- [SDR MALA030166](https://openairdocs.org/sdr/MALA030166), Feb 22, 2003: Saab 340B. TRANSPONDER. MALFUNCTIONED. DURING FLIGHT 3029, ATC REPORTED BOTH TRANSPONDERS INOPERATIVE ON THREE SEPARATE OCCASIONS, ON FLIGHT FROM GRF-MSP. TRAN (N441XJ)
- [SDR MALA030165](https://openairdocs.org/sdr/MALA030165), Feb 22, 2003: Saab 340B. WARNING LIGHT. ILLUMINATED. EN ROUTE TO PLN ON FLIGHT 2765, ATC REPORTED NO TRANSPONDER/MODE C READOUT ON NR 1 & 2 TRANSPONDERS. AIR RETURN TO DTW.  (N414XJ)
- [SDR 372PA0016](https://openairdocs.org/sdr/372PA0016), Dec 22, 2002: Boeing 737306. RECEIVER. V-Nav disconnects for no obvious reason. Re-racked both Nav receivers. Ran Bite chk. Ops normal at this time IAW MM34-22 (N372PA)

All 106: https://openairdocs.org/jasc/3450/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 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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