# Service difficulty reports: JASC 3450

A list on [JASC 3450](https://openairdocs.org/jasc/3450.md).

Reports filed under 3450 · Dependent Position Determining System, newest first.

Page 1 of 3 · 106 reports

- [SDR YENA2026050700450](https://openairdocs.org/sdr/YENA2026050700450.md): Transponder · failed · May 6, 2026 · N605JB · Airbus A320232
  > FLT# 754, SJU-FLL. (AIRCRAFT RTF TO SJU, AN EMERGENCY WAS DECLARED) "AFTER TAKEOFF WE RECIEVED AN ECAM FOR TRANSPONDER 2 + THE FO'S MAP DISAPPEARD THEN WE SMELL A VERY STRONG ELECTRICAL BURNING SMELL; FOUND ATC TRANSPONDER COMPUTER WITHIN BURNT SMELL REMREP #2
- [SDR YENA2024101801370](https://openairdocs.org/sdr/YENA2024101801370.md): Transponder · faulted · Oct 16, 2024 · N4064J · Airbus A321271N
  > 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.'
- [SDR YENA2023111701400](https://openairdocs.org/sdr/YENA2023111701400.md): Unknown · unknown · Nov 14, 2023 · N623JB · Airbus A320232
  > FLT#627, JFK-POP. (AIRCRAFT DIVERTED TO FLL) ' NAV ADS-B RPTG 1 FAULT ON ECAM. ADS-B RPTG 2 FAULT ON ECAM. FAULT INTERMITTENTLY CORRECTED ITSELF WHEN WE EXITED OCEANIC AIRSPACE. ( AUTOMATIC DEPENDENT SURVEILLANCE BROADCAST (ADS-B) SYSTEM).' (SUPPLEMENTAL INF
- [SDR 9JLA2023041322997](https://openairdocs.org/sdr/9JLA2023041322997.md): Antenna · failed · Apr 10, 2023 · N120SB · Gulstm GIV
  > FLIGHT CREW REPORTED THE ADSB SYSTEM WAS INTERMITTENT. THE MAINTENANCE BASE TROUBLESHOT AND FOUND THE ADSB ANTENNA AT FAULT. THE DEFECTIVE WAS REMOVED AND A NEW ANTENNA WAS INSTALLED. OPS CHECKS WERE SATISFACTORY, AND THE AIRCRAFT WAS RETURNED TO SERVICE.
- [SDR YENA2022110801098](https://openairdocs.org/sdr/YENA2022110801098.md): None · none · Nov 3, 2022 · N3104J · Airbus A300*
  > FLT#2186, PIT-BOS. 'DEPARTING PIT WITH A CLEARANCE TO CLIMB AND MAINTAIN 5000', PASSING BETWEEN 4000' AND 4300', THE FO NOTICED THE FMA INDICATE RETARD WITH THE THRUST LEVERS COMING BACK TO IDLE. THE AUTOTHROTTLES WERE DISCONNECTED AND THE A/C WAS LEVELED OFF
- [SDR ASAA2022070839003](https://openairdocs.org/sdr/ASAA2022070839003.md): Antenna · broken · Jul 8, 2022 · N469AS · Boeing 737990ER
  > # 1 DME ANTENNA BROKE IN HALF. GROUNDED - YES. #1 DME ANTENNA BROKE AND PART DEPARTED AIRCRAFT. PERFORMED CONDITIONAL INSPECTION DUE TO PART DEPARTING AIRCRAFT REF B737-900 AMM 05-51-59/201. NO DEFECTS NOTED. REMOVED AND REPLACED DME ANTENNA REF AMM 34-55-11 O
- [SDR YENA2022052700531](https://openairdocs.org/sdr/YENA2022052700531.md): Gps · inaccurate · May 22, 2022 · N579JB · Airbus A320232
  > FLT#1818, POS-FLL. ' BOTH GPS PRIMARY LOST ON ND DISPLAY. ATC ADVISED WE WERE 70 MILES OFF COURSE. UPON SHUTDOWN I FLL GPS DRIFT SHOWED 44 MILES; ACCOMPLISHED TSM TASK 34-58-00-810-828A RESET GPS 1&2 RESET MMR 1 & 2 REALIGNED ADIRUS DRIFT NOW SHOWS.3. NO DEFE
- [SDR ASAA2021092536122](https://openairdocs.org/sdr/ASAA2021092536122.md): Computer · faulty · Sep 25, 2021 · N590AS · Boeing 737890
  > PSEU LIGHT ILLUMINATED AFTER LANDING AND REMAINED ILLUMINATED FOR A FEW MINUTES - LIGHT EXTINGUISHED. GROUNDED - YES. CONFIRMED FCC-B INTERFACE FAULTS. REMOVED AND REPLACED FCC-B REF B737-800 AMM 22-11-33. OP CHECK GOOD. NO PSEU FAULTS. HGS SHOWS #2 RAD ALT WI
- [SDR UIEA2021071501554](https://openairdocs.org/sdr/UIEA2021071501554.md): Warning Message · false activation · Jul 14, 2021 · N641GT · Boeing 76738E
  > 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 OK. AMM 21-58-00.</P>)
- [SDR ASAA2021052634937](https://openairdocs.org/sdr/ASAA2021052634937.md): Warning Message · false activation · May 26, 2021 · N577AS · Boeing 737890
  > INTERMITTENT "GPS- INVALID" SCRATCH PAD MESSAGE APPEARED ALONE AND SEEMINGLY ASSOCIATED WITH INVALID MSG. CPDLC DURING THIS TIME WAS VERY SLOW TO RESPOND/ REPLY TO ATC QUERIES/ DIRECTIVES. (NEVER DID THE VTK FLAG APPEAR.). GROUNDED - YES. DIVERSION TIME 78 MIN
- [SDR ASAA2021010133804](https://openairdocs.org/sdr/ASAA2021010133804.md): Receiver · faulted · Jan 1, 2021 · N472AS · Boeing 737990ER
  > GPS L & R INVALID AND MESSAGE FOLLOWED BY GPS & IRS LIGHT. IRS LIGHT WENT OUT UPON MASTER CAUTION RECALL. GROUNDED-YES. DIVERSION TIME 52 MINUTES-L & R SIGNAL VALID ON GROUND. ALL FAULTS RESTORED. PER CREW BRIEF BOTH GPS SIGNALS WERE INVALID FOR ABOUT AN
- [SDR AALA201905099027](https://openairdocs.org/sdr/AALA201905099027.md): Control Panel · failed · May 7, 2019 · N808NN · Boeing 737823
  > AIRCRAFT WAS GROUNDED: PILOT REPORTS 1:44 INTO FLIGHT @ FL 380 RECIEVED RA AT 380 INDICATED ON ND AT AIRCRAFT NOSE, CLIMBED 500/ BOTH CA AND FO ND BLANKED. UPPER DU DISPLAYED N1 AND EGT, NO FF OR QTY ON LOWER DU ONLY N2 DISPLAYED OTHERWISE DUS WERE BLANK NR
- [SDR UIEA2018060701070](https://openairdocs.org/sdr/UIEA2018060701070.md): Battery Pack · inoperative · Jun 7, 2018 · N641GT · Boeing 76738E
  > AFT RIGHT EXTERNAL ESCAPE HATCH EMERGENCY SLIDE LIGHT INOPERATIVE. TROUBLESHOT IAW FIM 33-51, FOUND THE BATTERY PACK M733 INOPERATIVE. REPLACED THE BATTERY IAW AMM 33-51-07-201. OPS CHECKED GOOD IAW AMM 33-51-07-422-012.
- [SDR IXXA20180119002](https://openairdocs.org/sdr/IXXA20180119002.md): Interrogator · inoperative · Jan 15, 2018 · N739AX · Boeing 767232
  > CREW REPORTED WHEN EXTERNAL POWER IS CONNECTED, SMOKE AND FUMES FILL THE COCKPIT. REMOVED AND REPLACED RIGHT DME IAW AMM 34-55-01. OPS CHECKED SATISFACTORY. E & E SYSTEM PURGED IAW CONDITIONAL INSPECTION AMM 05-51-56. AIRCRAFT RELEASED TO SERVICE.
- [SDR HALA2016071900284](https://openairdocs.org/sdr/HALA2016071900284.md): Iru · warning message · Jul 19, 2016 · N582HA · Boeing 76733A
  > CENTER IRS FAULT MESSAGE ILLUMINATED AFTER LANDING. REPLACED CENTER IRU IAW AMM 34-21-01 AND PERFORMED MCDU TEST 30 & 40, FOUND NO FAULTS.
- [SDR MASA2015122612660](https://openairdocs.org/sdr/MASA2015122612660.md): Adc · intermittent · Dec 26, 2015 · N505MJ · Cndair CL6002C10
  > LOST BOTH NAV VOR INTERMITTENTLY. REPLACED NR 1 ADC.
- [SDR HALA2015082600173](https://openairdocs.org/sdr/HALA2015082600173.md): Irs · out of alignment · Aug 26, 2015 · N580HA · Boeing 76733A
  > CENTER IRS FAULT ON LANDING. ALIGNED CENTER IRS IAW 34-21-00-875-003. OPS CHECKED GOOD, NO FAULTS NOTED OK FOR SERVICE.
- [SDR CA150527008](https://openairdocs.org/sdr/CA150527008.md): Processor · malfunctioned · May 19, 2015 · Bombdr DHC8400
  > (CAN) SHORTLY AFTER LEVELING OFF IN THE CRUISE AT FL 240, 18 MINUTES IN TO THE FLIGHT, THE CAPTAIN`S PFD DISPLAYED IAS FAIL, ATT FAIL, IVSI FAIL, TCAS FAIL & HDG FAIL. QRH DRILL WAS ACTIONED FOR ATT FAIL & THE EFIS ATT HDG SOURCE WAS SELECTED TO NO 2 SOURCE,
- [SDR SIMA20141002007](https://openairdocs.org/sdr/SIMA20141002007.md): Unknown · failed · Oct 2, 2014 · N671AE · Emb EMB145LR
  > TAKEOFF ABORTED AT 70 - 80 KNOTS DUE TO MASTER WARNING & MASTER CAUTION & SPS ADVANCED GPWS INOPERATIVE SPS 1 & 2. STALL PROTECTION SYS OPERATIONS GOOD IAW AMM 145 27-36-00. SEE THIS LOG PAGE ITEMS 2 & 3. EGPWS WIND SHEAR WARNING & FLIGHT GUIDANCE SYS, WI
- [SDR ASAA2014082008904](https://openairdocs.org/sdr/ASAA2014082008904.md): Receiver · failed · Aug 20, 2014 · N409AS · Boeing 737990ER
  > TURNED ON ADF & RECEIVED AN ELECTRICAL BURNING ODOR AND THE POWER WENT OUT RIGHT AWAY ON RADIO. SELECTED OFF ON ADF AND THE ODOR WENT AWAY. ACFT GROUNDED. ACCOMPLISHED FIM 21-00, TASK 806, ODOR IN FLT DECK. DETERMINED ADF CONTROL PANEL WAS AT FAULT, HAD A B
- [SDR ASMF201406002](https://openairdocs.org/sdr/ASMF201406002.md): Bonding Jumper · defective · Apr 8, 2014 · N784XA · Boeing 737752
  > AIRCRAFT RETURNED OF FLIGHT DUE TO DURING CLIMB, BOTH FAIL FLAGS NAV CONTROL DISPLAYS WERE SHOWN. PERFORMED RESET TO RUPTURES P18-1 A-3 & P6-1 A-15 IAW FIM 34-51 TASK 812, NO FAILURES WERE FOUND. THE OVERWEIGHT INSPECTION WAS NOT NECESSARY DUE TO THE ACFT LA
- [SDR ASAA2014012212458](https://openairdocs.org/sdr/ASAA2014012212458.md): Indication Sys · false indication · Jan 22, 2014 · N435AS · Boeing 737990ER
  > 10 MINUTES PRIOR TO PUSH APU MAINT LIGHT ILLUMINATED. ACFT GROUNDED. INTERROGATED CDU FOUND MESSAGE 49-91227 LOW OIL QUANTITY, ACCOMPLISHED SHUTDOWN OF APU & VERIFIED OIL QUANITIY FULL. RESTARTED APU WITH NO LIGHT ILLUMINATION OF MAINTENANCE REF AMM FIM TAS
- [SDR QXEA2013122401560](https://openairdocs.org/sdr/QXEA2013122401560.md): Antenna · malfunctioned · Dec 24, 2013 · N418QX · Bombdr DHC8402
  > ERRATIC INDICATIONS ON BOTH PFDS DURING APPROACH. FLIGHT GUIDANCE INDICATED A RT TURN WHEN LOC NEEDLE WAS MOVING LT. LOC NEEDLE WAS SELDOM STEADY AND CONSTANTLY MIGRATING AROUND. HGS DISPLAY WAS VERY ERRATIC. 2 APPROACHES WERE CONDUCTED. GOOD IDENTS ON BO
- [SDR IPXA2013122301095](https://openairdocs.org/sdr/IPXA2013122301095.md): Lamp · inoperative · Dec 19, 2013 · N459UP · Boeing 75724APF
  > LAMPS BURNED OUT ON VOR NR 2 AUTO-MANUAL SWITCH. REPLACED LAMPS IN FLT. PUSHED SWITCH IN, AND A PUFF OF SMOKE. PULLED SWITCH OUT. PULLED CIRCUIT BREAKER AND LANDED NORMALLY. R & R RIGHT VOR CONTROL PANEL IAW AMM 34-51-02-002-022. OPS CHECKED NORMAL.
- [SDR ASMF2013110800008](https://openairdocs.org/sdr/ASMF2013110800008.md): Receiver · failed · Oct 15, 2013 · N359AM · Boeing 737800*
  > ACFT RETURNED OF FLIGHT DUE TO EICAS MESSAGE FRM’S 342 - 440-00, 345 - 030-02, 345 - 050-02 AND 345 - 060-02. MAINTENANCE PERFORMED THE FIM 34-51 TASK’S 801, 802, 805 AND 806 PROCEDURE. VOR/MARKER AND FMC WERE REPLACED IAW AMM 34-51-01 AND AMM 34-61-02, TEST
- [SDR REXA2013082201606](https://openairdocs.org/sdr/REXA2013082201606.md): Transponder · inoperative · Aug 22, 2013 · N8412F · Cndair CL6002B19
  > NR 2 TRANSPONDER IS INOPERATIVE.
- [SDR REXA2013053101059](https://openairdocs.org/sdr/REXA2013053101059.md): Unknown · malfunctioned · May 31, 2013 · N8808H · Cndair CL6002B19
  > ON APPROACH BOTH PILOT PFD'S WAS INTERMITTENTLY LOSING LOCALIZER & G SLOPE 5 TIMES ON 20 MILE FINAL TO LANDING. COULD NOT DUPLICATE DISCREPANCY NAV SYS TEST OK IAW AMM 34-51-00. TEST SET ON FOR 20+ MINUTES NEVER LOST G/S OR LOCALIZER ON EITHER SIDE.
- [SDR CA130301009](https://openairdocs.org/sdr/CA130301009.md): Ahrs · failed · Jan 18, 2013 · Pilats PC1247E
  > (CAN) DURING ENGINE GROUND RUN, RN 1 AND 2 HEADING SPLIT 70 DEGREES AND ADAHRS HDG MISCOMPARE FLAG CAME ON. HEADING CAME TO APPROXIMATELY 45 DEGREES BY TIME FOR SHUTDOWN. REPLACED ADAHRS UNIT IAW MM PROCEDURES, AND ACFT RETURNED TO SERVICE.
- [SDR CALA2012062700417](https://openairdocs.org/sdr/CALA2012062700417.md): Warning Message · false activation · Jun 27, 2012 · N41140 · Boeing 757224
  > EICAS MESSAGES C IRS FAULT AND RT IRS FAULT ILLUMINATED PERFORMED INERTIAL REF SYS BITE CHECK IAW AMM 34-21-00-715-04. 4 NR FAULTS OR DEFETCS NOTED. PERFORMED MCDP BITE TEST 30 IAW AMM 22-00-02, NO CURRENT FAULTS, TEST PASSED. ACFT FULL CAPABILITY CAT III, L
- [SDR VNAA2011061400008](https://openairdocs.org/sdr/VNAA2011061400008.md): Circuit Card · failed · Jun 8, 2011 · N249PS · Cndair CL6002B19
  > CREW REPORTED LOST FMS, THEN LOST NAV 1 IN FLIGHT EN ROUTE FROM DCA TO TYS. CREW DIVERTED TO IAD AND LANDED WITHOUT INCIDENT. USING AIRCRAFT MAINTENANCE MANUALS, MAINTENANCE PERFORMED CHECKS OF NR 1 NAV SYSTEM. NO DEFECTS NOTED. MAINTENANCE DEFERRED FMS PE
- [SDR COEA2011032803911](https://openairdocs.org/sdr/COEA2011032803911.md): Receiver · malfunctioned · Mar 28, 2011 · N911FX · Aerosp ATR42300
  > 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 SEA WHERE THERE WAS MORE SUITABLE MAINTENANCE AND PARTS AVAILABLE. MAINTENANCE REMOVED AND REPLACED THE NR 2 NAV RECEIVER. AIRCRAFT RETURNED
- [SDR 2011FA0000312](https://openairdocs.org/sdr/2011FA0000312.md): Antenna · noisy · Mar 24, 2011 · N289CM · Cirrus SR22
  > DIGITAL DATA NOISE IN HEADSETS. ACFT MODE S TRANSPONDER SYS. CURRENT ANTENNA LOCATION IS TOO CLOSE TO CABIN ENVIRONMENT.
- [SDR QXEA2009021800128](https://openairdocs.org/sdr/QXEA2009021800128.md): Antenna · corroded · Feb 16, 2009 · N618QX · Cndair CL6002C10
  > PDX - THE TCAS OMNI DIRECTIONAL ANTENNA HAS PITTING CORROSION ON THE BASE. REPLACED THE ANTENNA. OPERATIONAL CHECKS GOOD.
- [SDR HNAA2008122200359](https://openairdocs.org/sdr/HNAA2008122200359.md): Receiver · failed · Dec 17, 2008 · N931HA · Dhav DHC8102
  > NUMBER ONE NAVIGATION RADIO FAILED IN FLIGHT, CONTROL HEAD DISPLAY WENT BLANK AND NAVIGATION FLAG SHOWING. REMOVED AND REPLACED NUMBER 1 NAVIGATION RECEIVER, CHECKED WITH TIC BOX, OPS CK'D GOOD IN ACCORDANCE WITH 34-55-00.
- [SDR TRAX200800111](https://openairdocs.org/sdr/TRAX200800111.md): Warning Message · false indication · Jan 19, 2008 · N878AS · Cndair CL6002B19
  > RECEIVED MULTIPLE EFIS COMP MON ON TAXI AND TAKEOFF. AT 12000 LOST FMS, AHRS; UNABLE TO FLY GREEN NEEDLES FOR 10 MINS. ABLE TO RETRIEVE GREEN NEEDLE CAPABILITY AFTER 10 MINS. A/C RETURNED TO ATL AFTER T/O. PILOT CANCELLED EMERGENCY DECLARED/TOWER ROLLED EM
- [SDR QXEA200701232](https://openairdocs.org/sdr/QXEA200701232.md): Transponder · unknown · Aug 3, 2007 · N413QX · Bombdr DHC8402
  > PDX FLIGHT NR 2309: ATC UNABLE TO PICK UP TRANSPONDERS. IT WAS ON STANDBY AND UNABLE TO CYCLE ON ALT. TRIED BOTH CHANNELS. WORKED AFTER LANDING. AIRCRAFT RETURNED TO GATE. MAINTENANCE COULD NOT DUPLICATE. CYCLED AIRCRAFT POWER. OPS CHECK GOOD IAW MTC 63
- [SDR 753002](https://openairdocs.org/sdr/753002.md): Inu · failed · Jul 18, 2007 · N753SA · Boeing 747228F
  > TAKEOFF REJECTED AT 120 KNOTS AT RKSI, DUE TO NR 1 INS FAIL WARNING AND CAPTAIN'S ATTITUDE INSTRUMENT FAIL WARNING. REMOVED AND REPLACED NR 1 INU IN ACCORDANCE WITH AMM 34-41-03. OPERATIONAL CHECK NORMAL ON GROUND. ACCOMPLISHED HIGH ENERGY STOP/HEAT DAMAGE
- [SDR MASA200601018](https://openairdocs.org/sdr/MASA200601018.md): Status Message · illuminated · Apr 5, 2006 · N77181 · Cndair CL6002B19
  > ASH 7107 IAD - FLIGHT SPOILER FAULT STATUS MESSAGE AND YAW DAMP 1 INOP STATUS MESSAGE. MAINTENANCE COULD NOT DUPLICATE.
- [SDR MALA060146](https://openairdocs.org/sdr/MALA060146.md): Transponder · malfunctioned · Mar 13, 2006 · N402XJ · Saab 340B
  > SECOND DIGIT OF TRANSPONDER CODE IS BEING RECEIVED FOUR HIGHER THAN IS DISPLAYED ON UNIT. REMOVED AND REPLACED NR 1 TRANSPONDER.
- [SDR MALA060144](https://openairdocs.org/sdr/MALA060144.md): Control Head · malfunctioned · Mar 13, 2006 · N402XJ · Saab 340B
  > SECOND DIGIT OF TRANSPONDER CODE IS BEING RECEIVED FOUR HIGHER THAN IS DISPLAYED ON UNIT. REMOVED AND REPLACED CONTROL HEAD. P/N ON/OFF: 622-6523-213; S/N ON: 12760; S/N OFF: 12891.
- [SDR MALA060147](https://openairdocs.org/sdr/MALA060147.md): Transponder · malfunctioned · Mar 13, 2006 · N402XJ · Saab 340B
  > SECOND DIGIT OF TRANSPONDER CODE IS BEING RECEIVED FOUR HIGHER THAN IS DISPLAYED ON UNIT. REMOVED AND REPLACED NR 2 TRANSPONDER.
- [SDR MASA200600026](https://openairdocs.org/sdr/MASA200600026.md): Transceiver · malfunctioned · Jan 10, 2006 · N907FJ · Cndair CL600*
  > ASH 6336 PHX - GEAR UP UNSAFE MSG/GLD UNSAFE. R2 NR 1 DME AND GEAR SWING. OPS CHECK GOOD.
- [SDR MALA040468](https://openairdocs.org/sdr/MALA040468.md): Receiver · odor · Jun 17, 2004 · N429XJ · Saab 340B
  > ELECTRICAL BURNING ODOR IN COCKPIT GOES AWAY WHEN NAV 1 IS TURNED OFF. MAINTENANCE INSPECTED COCKPIT AND AVIONICS RACK FOUND ONLY SLIGHT ODOR IN AVIONICS RACK, SUSPECT ODOR IS FROM NR 1 NAV RECEIVER CHANGED ON 6/16/04 AND ODOR IS RESIDUAL.
- [SDR MALA040467](https://openairdocs.org/sdr/MALA040467.md): Receiver · odor · Jun 16, 2004 · N429XJ · Saab 340B
  > AFTER STARTING RT ENGINE ODOR OF SMOKE NOTED IN COCKPIT AND FWD SECTION OF CABIN, NO VISUAL SMOKE NOTED, ODOR WAS MORE INTENSE WITH BLEED AIR OFF AND RECIRC ON. MAINTENANCE FOUND BURNED ODOR COMING FROM 31 NAV RX. REPLACED NR 1 NAV RX P/N 622-6137-001, S/N O
- [SDR DL76L040297](https://openairdocs.org/sdr/DL76L040297.md): Iru · out of adjust · Apr 2, 2004 · N184DN · Boeing 767332
  > FMC WAS NOT PROVIDING GOOD NAV ORIENTATION IMMEDIATELY AFTER T/O. ALL DATA WAS OFF BY APPROX 300 MILES. UPON LANDING AT SNN POS SHOWED AIRCRAFT AT GATE IN HAM. RESET AND BITE CHECK OF BOTH FMCS, NO TROUBLE. CHECKED NAV DATA BASE FOR FMC, DATABASE CORRECT.
- [SDR CA030919003](https://openairdocs.org/sdr/CA030919003.md): Control Panel · malfunctioned · Sep 7, 2003 · Boeing 767375
  > (CAN) A/C HAD A DUAL ATC FAILURE AFTER DEPARTURE LHR. UK ATC WOULD NOT LET THE A/C PROCEED SO RETURNED TO LHR. OVERWEIGHT LANDING CHECK CARRIED OUT. ATC CONTROL PANEL CHANGED AND NO FURTHER FAULT
- [SDR 234TR0007](https://openairdocs.org/sdr/234TR0007.md): Indicator · malfunctioned · Jul 25, 2003 · N234TR · Boeing 737228
  > FIRST OFFICER'S HSI - VOR FROM, ILS VALID, VOR VALID, FLAG ERRONEOUS. REPLACED HSI. ALL FUNCTIONS OPERATE NORMAL.
- [SDR MALA030166](https://openairdocs.org/sdr/MALA030166.md): Transponder · malfunctioned · Feb 22, 2003 · N441XJ · Saab 340B
  > DURING FLIGHT 3029, ATC REPORTED BOTH TRANSPONDERS INOPERATIVE ON THREE SEPARATE OCCASIONS, ON FLIGHT FROM GRF-MSP. TRANSPONDER LOCKED UP WITH ACT LIGHT ILLUMINATED. TCAS ALSO SWITCHED TO OFF MODE. ATC REPORTED LOST MODE C AND REGULAR RETURN ONLY WAY TO CLE
- [SDR MALA030165](https://openairdocs.org/sdr/MALA030165.md): Warning Light · illuminated · Feb 22, 2003 · N414XJ · Saab 340B
  > EN ROUTE TO PLN ON FLIGHT 2765, ATC REPORTED NO TRANSPONDER/MODE C READOUT ON NR 1 & 2 TRANSPONDERS. AIR RETURN TO DTW. MAINTENANCE CYCLED POWER, 1 & 2 TRANSPONDERS. OPS CHECK GOOD IAW SAAB MM CH 34, ALT REPORTING SYSTEM TESTED IAW FAR 43 APPX E PARA C.
- [SDR 372PA0016](https://openairdocs.org/sdr/372PA0016.md): Receiver · Dec 22, 2002 · N372PA · Boeing 737306
  > V-Nav disconnects for no obvious reason. Re-racked both Nav receivers. Ran Bite chk. Ops normal at this time IAW MM34-22-00.

Next page: https://openairdocs.org/jasc/3450/reports.md?page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
WHERE jasc_code = '3450'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/jasc/3450/reports

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