# JASC 3455: Automatic Direction Finder (ADF) System

- Type: JASC system/component code (FAA)
- ATA chapter: 34 Navigation
- Title in the code table: ADF SYSTEM
- Service difficulty reports: 164
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=41
- Page: https://openairdocs.org/jasc/3455

## What it covers

The low frequency band system which receives a signal from a non-directional radio beacon to determine relative position from the beacon location (i.e., automatic direction finder - ADF system). Typical parts are antenna, control unit, receiver, coaxial cables, etc.

## Service difficulty reports (164, newest 50)

- [SDR DALA2017050603654](https://openairdocs.org/sdr/DALA2017050603654), May 4, 2017: Boeing 767332. RECEIVER. ODOR. DURING CRUISE, ONE HOUR INTO FLIGHT, THE LEFT ADF DISPLAYED ON CAPTAIN`S AND FIRST OFFICER`S MAP DISPLAY . AT SAME TIME  (N190DN)
- [SDR O2JA2017042000001](https://openairdocs.org/sdr/O2JA2017042000001), Apr 20, 2017: Lear 35A. ADF. FIRE. ADF BECAME VERY HOT TO THE TOUCH DURING FLIGHT, IT WAS TURNED OFF. A FEW MINUTES LATER FLAMES APPEARED BETWEEN THE HF RA (N991AL)
- [SDR O2JA201704270001](https://openairdocs.org/sdr/O2JA201704270001), Apr 19, 2017: Lear 35A. ADF. BURNED OUT. ADF BECAME VERY HOT TO TOUCH DURING FLIGHT. THE UNIT WAS TURNED OFF, A FEW MINUTES LATER FLAMES APPEARED BETWEEN ADF AND (N991AL)
- [SDR DALA2017021401198](https://openairdocs.org/sdr/DALA2017021401198), Feb 11, 2017: Boeing 767332. RECEIVER. ODOR. CAPTAIN`S AND F/O`S YELLOW BAND DISPLAYED ON HSI'S. CIRCUIT BREAKER WAS RESET (A3) IAW MCC WITHIN 30 SEC STARTED TO SMEL (N196DN)
- [SDR COZA20151112064](https://openairdocs.org/sdr/COZA20151112064), Nov 12, 2015: Boeing 7377BX. ANTENNA. INOPERATIVE. NUMBER 2 ADF FAILED TO OPERATE & WAS TROUBLE SHOT TO THE ANTENNA. REPLACED THE ANTENNA & NR 2 ADF OPERATES CORRECTLY. (N737KA)
- [SDR DALA2015080404795](https://openairdocs.org/sdr/DALA2015080404795), Jul 29, 2015: Boeing 767332. RECEIVER. ODOR. PERFORMED AN AIR TURNBACK DUE TO AN ELECTRICAL BURNING ODOR THROUGHOUT THE ACFT. FOUND CIRCUIT BREAKER POSITION F6, LEFT (N138DL)
- [SDR USAA2015033000003](https://openairdocs.org/sdr/USAA2015033000003), Mar 29, 2015: Airbus A319132. RECEIVER. FAULTY. SMELL OF ELEC ODOR THROUGHT ACFT. TROUBLE SHOT IAW JC 26L00021001 CABIN AIR QUALITY. FOUND AUTOMATIC DIRECTION FINDER, A (N833AW)
- [SDR HALA2013041700038](https://openairdocs.org/sdr/HALA2013041700038), Apr 17, 2013: Airbus A330243. WARNING LIGHT. FALSE ACTIVATION. NAV FM/IR POSITION DISAGREE. ON ARRIVAL "NAV FM/IR POS DISAGREE" AND "GPS PRIMARY LOST" MSG NOT SHOWN. PFR SHOWS FM/IR P (N389HA)
- [SDR CA130402012](https://openairdocs.org/sdr/CA130402012), Apr 1, 2013: Dhav DHC8311. CAPACITOR. BURNED. (CAN) 2 ADF UNSERVICEABLE. VOLTAGE OUTPUT ON PIN 48=323V. AND ON PIN 45= -55V ADF CONTROL HEAD WAS REPLACED TWICE DUE TO
- [SDR CA130405004](https://openairdocs.org/sdr/CA130405004), Mar 18, 2013: Beech B200. ADF. MALFUNCTIONED. (CAN) ON APPROACH IT WAS NOTED BY THE CREW THAT THE ADF BECAME UNRESPONSIVE, FURTHER INSPECTION BY THE CREW INDICATED TH
- [SDR CA120827017](https://openairdocs.org/sdr/CA120827017), Aug 25, 2012: Airbus A310304. CONTROL PANEL. OVERHEATED. (CAN) DURING CRUISE FLIGHT, FLIGHT CREW REPORTED SMOKE COMING OUT OF ADF NR 2 CONTROL PANEL. ADF2 CIRCUIT BREAKER WAS PU
- [SDR UALA2012020200638](https://openairdocs.org/sdr/UALA2012020200638), Feb 2, 2012: Airbus A320232. SCREW. MISSING. ADF ANTENNA HAS 3 EA SCREWS BACKED (OUT OF 12) - AND - SEALANT OVER SCREWS IS MISSING - AND - FILLET SEAL IS MISSING - F (N442UA)
- [SDR UALA2011110105915](https://openairdocs.org/sdr/UALA2011110105915), Oct 31, 2011: Boeing 757222. RECEIVER. FAULTY. ADF AUDIO AT ALL CREW STAT'N IS WEAK, INOP, INTERMIT, ETC WITH ANT MODE SET ON ADF CNTRL PNL. RDMI BEARING POINTER OPERA (N597UA)
- [SDR UALA2011050602231](https://openairdocs.org/sdr/UALA2011050602231), May 6, 2011: Boeing 757222. NUT PLATE. DEFECTIVE. ADF ANTENNA REMOVED AND TWO BAD NUT PLATES REMOVED FROM AIRCRAFT STRUCTURE. ACCOMPLISHED CF9050 METER TWO BAD NUT PLATES (N565UA)
- [SDR UALA2010010500074](https://openairdocs.org/sdr/UALA2010010500074), Jan 4, 2010: Boeing 767322. ANTENNA. DAMAGED. WATER FALLING FROM OVRHD 22-23. R & R SATURATED INSULATION BLANKETS. REPLACED 2 EA ADF ANTENNAS AND LOW GAIN ANT. WORKIN (N658UA)
- [SDR UALA2009082702689](https://openairdocs.org/sdr/UALA2009082702689), Aug 25, 2009: Boeing 757222. INTERROGATOR. ODOR. DURING TAKEOFF SMELLED ELECTRICAL ODOR, NO SMOKE, AFTER SAFELY AIRBORNE SAW R DME CB POPPED. ELECTRIC ODOR DISSIPATED QU (N554UA)
- [SDR SWIA200921186](https://openairdocs.org/sdr/SWIA200921186), Jan 9, 2009: Cndair CL6002B19. ANTENNA. CORRODED. C-CHECK, ADF ANTENNA FUSELAGE SURFACE CORRODED. REPAIRED PER REO. (N409SW)
- [SDR MT92008F00008](https://openairdocs.org/sdr/MT92008F00008), Nov 4, 2008: Cessna 208B. TRANSISTOR. BURNED. THE PILOT REPORTED SMOKE IN THE COCKPIT TO ATC, DECLARED AN EMERGENCY, AND RETURNED TO DEPARTURE. THE SMOKE THAT WAS SEE (N4687B)
- [SDR 2007FA0000878](https://openairdocs.org/sdr/2007FA0000878), Jun 29, 2007: TRANSPONDER. FAILED. ON 6/27/2007 WHILE ENROUTE, THE PRIMARY TRANSPONDER FAILED WHILE THE AIRCRAFT WAS OPERATING IN AIRSPACE. THE CREW WAS AB (N56EM)
- [SDR CA070227012](https://openairdocs.org/sdr/CA070227012), Feb 23, 2007: Pilats PC1245. RECEIVER. ERRATIC. (CAN) THE VOLUME ON THE ADF WAS VERY HARD TO ADJUST AND ERRATIC. ADF RECEIVER REPLACED (TC NR 20070227012)
- [SDR HALA0600846](https://openairdocs.org/sdr/HALA0600846), Nov 4, 2006: Boeing 767300. DISPLAY. FAILED. ATB CAPT HSI DEV BAR MISSING. RDMI VOR BEARING NEEDLES ARE NORMAL. FREQ AND CRS WINDOW ON NAV SELECT PANEL BLANK. REPLAC (N587HA)
- [SDR DL75K060809](https://openairdocs.org/sdr/DL75K060809), Oct 2, 2006: Boeing 757232. CONTROL PANEL. SMOKE. JUST PRIOR TO PUSHBACK, SMOKE BEGAN COMING FROM CAPTS SIDE VOR/DMA CONTROL PANEL. AFTER POWER REMOVED SMOKE STOPPED. REM (N608DA)
- [SDR 05FDEA01663](https://openairdocs.org/sdr/05FDEA01663), Jun 23, 2005: Boeing 7272S2F. ANTENNA. CORRODED. NR 2 ADF ANTENNA DISBONDED AND CORRODED. REMOVED AND REPLACED NR 2 ADF LOOP ANTENNA IAW 34-37-012-4. PERFORMED OP CHECK  (N203FE)
- [SDR BAQA092514](https://openairdocs.org/sdr/BAQA092514), Feb 3, 2004: Lear 55LEAR. POTENTIOMETER. INTERMITTENT. VOLUME POT INTERMITTENT. REPLACED WITH SERVICEABLE UNIT. 02/04/2004 (N40DK)
- [SDR BAQA091155](https://openairdocs.org/sdr/BAQA091155), Nov 25, 2003: Aerosp AS355F2. RECEIVER. FAILED. RECEIVER DISPLAY DOES NOT WORK. REPLACED WITH SERVICEABLE UNIT. (N941MS)
- [SDR HEEA088393](https://openairdocs.org/sdr/HEEA088393), Jul 30, 2003: Skrsky S76A. CONTROL BOX. INOPERATIVE. ADF SYSTEM CONTROL BOX INOPERATIVE. IN SHOP REPAIR. (N762P)
- [SDR HEEA088391](https://openairdocs.org/sdr/HEEA088391), Jul 16, 2003: Skrsky S76A. TRANSCEIVER. MALFUNCTIONED. AUDIO FADES OUT. SENSE COAX CONNECTOR IS LOOSE. IN SHOP REPAIR. (N1545K)
- [SDR HEEA088518](https://openairdocs.org/sdr/HEEA088518), Jul 13, 2003: Bell 412. TRANSCEIVER. INTERFERENCE. ADF TRANSCEIVER RECEIVES WITH EXCESSIVE STATIC. IN SHOP REPAIR. (N2261D)
- [SDR HEEA086543](https://openairdocs.org/sdr/HEEA086543), May 22, 2003: Skrsky S76A. CONTROL UNIT. MALFUNCTIONED. ADF CONTROL UNIT IS UNREADABLE. IN SHOP REPAIR. (N762P)
- [SDR HEEA086542](https://openairdocs.org/sdr/HEEA086542), May 22, 2003: Skrsky S76A. CONTROL UNIT. MALFUNCTIONED. ADF CONTROL UNIT IS UNREADABLE. IN SHOP REPAIR. (N762P)
- [SDR HEEA086540](https://openairdocs.org/sdr/HEEA086540), May 22, 2003: Skrsky S76A. CONTROLLER. MALFUNCTIONED. ADF CONTROLLER IS UNREADABLE. IN SHOP REPAIR. (N762P)
- [SDR HEEA086538](https://openairdocs.org/sdr/HEEA086538), May 22, 2003: Skrsky S76A. TRANSCEIVER. INOPERATIVE. ADF TRANSCEIVER INOPERATIVE. IN SHOP REPAIR. (N4253S)
- [SDR HEEA084713](https://openairdocs.org/sdr/HEEA084713), Feb 17, 2003: Bell 412. CONTROL BOX. DAMAGED. ADF CONTROL BOX DAMAGED, CAN'T CHANGE FREQUENCY. FOUND DISPLAY DS302, PHOTOCELL V301, PHOTOCELL LENS BAD AND SWITCH SPOO (N142PH)
- [SDR HEEA084630](https://openairdocs.org/sdr/HEEA084630), Feb 14, 2003: Bell 412. TRANSCEIVER. INOPERATIVE. ADF TRANSCEIVER INOPERATIVE NO AUDIO. FOUND UNIT -15 VOLTS MISSING. FOUND POWER SUPPLY TRANSISTOR Q105, IC I101 AND RESI (N5759N)
- [SDR HEEA084629](https://openairdocs.org/sdr/HEEA084629), Feb 14, 2003: Bell 412. TRANSCEIVER. NOISY. ADF TRANSCEIVER HAS CONTINUOUS NOISE IN BACKGROUND. REPAIRED. (N22608)
- [SDR HEEA084628](https://openairdocs.org/sdr/HEEA084628), Feb 14, 2003: Bell 412. TRANSCEIVER. WEAK. ADF TRANSCEIVER WEAK AND UNRELIABLE. REPAIRED. (N22608)
- [SDR HEEA084627](https://openairdocs.org/sdr/HEEA084627), Feb 14, 2003: Bell 412. TRANSCEIVER. MALFUNCTIONED. ADF TRANSCEIVER DOES NOT RECEIVE. REPAIRED. (N3893N)
- [SDR HEEA083471](https://openairdocs.org/sdr/HEEA083471), Jan 10, 2003: Bell 412. TRANSCEIVER. INOPERATIVE. ADF TRANSCEIVER INOPERATIVE. IN SHOP REPAIR. (N2298Z)
- [SDR HEEA082412](https://openairdocs.org/sdr/HEEA082412), Dec 12, 2002: Skrsky S76A. KNOB. LOOSE. CONTROL KNOB IS LOOSE AND CANNOT BE TIGHTENED. REPLACED 28V LIGHTS, DECAL, DISPLAY LENS AND TIGHTENED KNOB. REPAIRED. BE (N22342)
- [SDR HEEA082398](https://openairdocs.org/sdr/HEEA082398), Dec 12, 2002: Skrsky S76A. RECEIVER. FAILED. ADF RECEIVER FOUND INOPERATIVE. PERFORMED PRELIMINARY INSPECTION. FOUND IC I306, I307 BAD. REPLACED. REPAIRED. BENCH CHE (N22342)
- [SDR HEEA082395](https://openairdocs.org/sdr/HEEA082395), Dec 12, 2002: Skrsky S76A. TRANSCEIVER. WEAK. WEAK RECEIVE AUDIO, WON'T POINT TO STATIONS. IN SHOP REPAIR. (N4253S)
- [SDR BAQA081592](https://openairdocs.org/sdr/BAQA081592), Dec 6, 2002: Bolkms BK117B1. RECEIVER. INTERMITTENT. ADF RECEIVER DISPLAY IS INTERMITTENT. REPLACED WITH SERVICEABLE UNIT. (N945ME)
- [SDR SWIA200211115](https://openairdocs.org/sdr/SWIA200211115), Aug 2, 2002: Emb EMB120ER. RECEIVER. FAILED. WHILE HOLDING AT WYS, ADF FAILED IN FLIGHT. DIVERTED TO IDA. REPLACED ADF RECEIVER. OPS CHECKS GOOD IAW MM 34-53-00. (N190SW)
- [SDR HEEA080420](https://openairdocs.org/sdr/HEEA080420), Jul 9, 2002: Skrsky S76A. TRANSCEIVER. INOPERATIVE. ADF TRANSCEIVER HAS NO LOW BAND RECEPTION OR NEEDLE MOVEMENT. REPAIRED. (N4253S)
- [SDR HEEA080116](https://openairdocs.org/sdr/HEEA080116), Jun 26, 2002: Bell 412. TRANSCEIVER. INOPERATIVE. TRANSCEIVER INOPERATIVE. NO AUDIO AND WILL NOT POINT. (N3893N)
- [SDR HEEA080110](https://openairdocs.org/sdr/HEEA080110), Jun 25, 2002: Bell 214ST. AMPLIFIER. INOPERATIVE. ADF AMPLIFIER INOPERATIVE. (N8045T)
- [SDR HEEA079916](https://openairdocs.org/sdr/HEEA079916), Jun 25, 2002: Skrsky S76A. TRANSCEIVER. FAILED. NO LOW BAND RECEPTION OR NEEDLE MOVEMENT. (N4253S)
- [SDR 482DM32702](https://openairdocs.org/sdr/482DM32702), Mar 29, 2002: Mtsbsi MU300. RECEIVER. UNRELIABLE. ADF INDICATOR INTERMITTENTLY WILL NOT LOCK ON SIGNAL, NEEDLE WOULD WANDER OFF STATION, THEN LOCK ON TO STATION. PILOT RE (N482DM)
- [SDR AUS20020211](https://openairdocs.org/sdr/AUS20020211), Feb 23, 2002: Cessna TR182. LIGHT. UNSERVICEABLE. (AUS) ADF INTERNAL LIGHTS UNSERVICEABLE.
- [SDR HEEA076962](https://openairdocs.org/sdr/HEEA076962), Oct 30, 2001: Bell 412. TRANSCEIVER. MALFUNCTIONED. WILL NOT PAINT AND NO AUDIO. REPLACED WITH SERVICEABLE PART. (N2261D)

All 164: https://openairdocs.org/jasc/3455/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 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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