# JASC 3424: Turn and Bank/Rate of Turn Indicator

- Type: JASC system/component code (FAA)
- ATA chapter: 34 Navigation
- Title in the code table: TURN AND BANK/RATE OF TURN INDICATOR
- Service difficulty reports: 153
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=38
- Page: https://openairdocs.org/jasc/3424

## What it covers

The instrument actuated by gyroscopic forces and driven by air flow or electric motor to indicate both rate of turn and angle of bank.

## Service difficulty reports (153, newest 50)

- [SDR 2026F00174](https://openairdocs.org/sdr/2026F00174), Aug 13, 2026: Cessna 208B. INDICATOR. OVERHEATED. AIRCRAFT WAS OPERATING A PART 135 FLIGHT FROM KABI TO KDFW. DURING CRUISE FLIGHT AT APPROX 7,000 FT MSL NEAR THE BOOVE W (N12155)
- [SDR AALA202504083701](https://openairdocs.org/sdr/AALA202504083701), Apr 7, 2025: Boeing 737823. DISPLAY. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: (ISFD)-INTEGRATED STANBY FLIGHT DISPLAY ATTITUDE FAILED CLI (N932NN)
- [SDR CALA2025011401903](https://openairdocs.org/sdr/CALA2025011401903), Jan 10, 2025: Boeing 737924ER. INDICATOR. INOPERATIVE. A/R* DUE TO INTEGRATED STANDBY FLIGHT DISPLAY INDICATOR INOP ISFD SHOWS OUT OF ORDER FLAG REPLACED ISFD REF AMM 34-24-02 (N37470)
- [SDR 2024FA0000248](https://openairdocs.org/sdr/2024FA0000248), Mar 21, 2024: Cessna 172N. INDICATOR. INOPERATIVE. OFF FLAG INOPERATIVE, FLAG DOES NOT PULL. (N3080E)
- [SDR AALA201908279051](https://openairdocs.org/sdr/AALA201908279051), Aug 26, 2019: Boeing 7878. DISPLAY. FAILED. AIRCRAFT WAS GROUNDED: FLIGHT DIVERTED TO LHR ON ACCOUNT OF INTEGRATED FLIGHT STANDBY DISPLAY INOPERATIVE. EMERGENCY WAS (N805AN)
- [SDR YV3R2019012200099](https://openairdocs.org/sdr/YV3R2019012200099), May 29, 2019: Robsin R44RAVENII. INDICATOR. INOPERATIVE. CUSTOMER REPORTED TURN COORDINATOR P/N: B329-1 INOPERATIVE. (N123MV)
- [SDR ASMF20180625012](https://openairdocs.org/sdr/ASMF20180625012), May 23, 2018: Boeing 737752. INDICATOR. FAILED. CAPTAIN REPORTED, BEFORE TAXI, THE STANDBY ATTITUDE INDICATOR WENT OUT OF SERVICE, MAINTENANCE PERFORMED AN INSPECTION C (N904AM)
- [SDR FQAR20171011091](https://openairdocs.org/sdr/FQAR20171011091), Oct 11, 2017: Piper PA28181. INDICATOR. FAILED. AN OVERHAULED TURN COORDINATOR HAD BEEN INSTALLED ON THE AIRCRAFT. THE NEXT DAY, THE NEWLY INSTALLED TURN COORDINATOR WA (N921PA)
- [SDR HNAA2015101402960](https://openairdocs.org/sdr/HNAA2015101402960), Oct 14, 2015: Dhav DHC8102. SWITCH. CONTAMINATED. SMOKE EMANATED FROM THE SAHS SWITCH. FOUND GYRO NR 1 SWITCH ON GYRO PANEL SCORCHED 3420-SW1. CLEANED DEBRIS FROM OTHER S (N930HA)
- [SDR HALA2015090600188](https://openairdocs.org/sdr/HALA2015090600188), Sep 6, 2015: Airbus A330243. INDICATOR. MALFUNCTIONED. ISIS STARTED DRIFTING AFTER TAKEOFF VERY SLOW TO LEVEL AFTER A ROLL & PITCH CONTINOUSLY DRIFTED FROM 0 DEGS TO PLUS 20 D (N381HA)
- [SDR HALA2015081000158](https://openairdocs.org/sdr/HALA2015081000158), Aug 10, 2015: Boeing 76733A. WARNING MESSAGE. ILLUMINATED. DURING CRUISE FLT "COMP" WARNING APPEARED BOTTOM OF CAPTS ADI AND "ATT" WARNING APPEARED IN F/O ADI WITH NO HORIZON VISI (N583HA)
- [SDR PNSA2015061202](https://openairdocs.org/sdr/PNSA2015061202), Jun 12, 2015: Saab 340B. DISPLAY. FAILED. EADI BLANKS, R & R NR 2 DPU. (N369PX)
- [SDR UALA2013041802658](https://openairdocs.org/sdr/UALA2013041802658), Apr 17, 2013: Boeing 767322. INDICATOR. FAILED. STANDBY ATTITUDE INDICATOR FAILED, RETURNED TO FIELD. CIRCUIT BREAKER DID NOT TRIP AND GYRO TUMBLED. REPLACED STANDBY AT (N643UA)
- [SDR CA130118001](https://openairdocs.org/sdr/CA130118001), Jan 17, 2013: Cessna 172S. INDICATOR. OUT OF TOLERANCE. (CAN) UPON PILOT GETTING TO ACFT TO PERFORM A PREFLIGHT WALK AROUND CHECKS, IT WAS NOTICED THAT THE TURN COORDINATOR WAS
- [SDR IPXA13B76673](https://openairdocs.org/sdr/IPXA13B76673), Jan 12, 2013: Boeing 74744AF. DISPLAY. INOPERATIVE. ISFD CIRCUIT BREAKER TRIPPED ON GROUND AFTER POWER TRANSFER. RESET SUCCESSFULLY. CIRCUIT BREAKER TRIPPED AGAIN SHORTLY A (N570UP)
- [SDR CA120604006](https://openairdocs.org/sdr/CA120604006), May 22, 2012: Cessna U206G. INDICATOR. INOPERATIVE. (CAN) ON A FLIGHT, THE PILOT DISCOVED THE TURN & BANK BECAME UNSERVICEABLE, THE ACFT LANDED WITHOUT FURTHER INCIDENT. MA
- [SDR CA120326010](https://openairdocs.org/sdr/CA120326010), Mar 23, 2012: Beech B200. INDICATOR. FAILED. (CAN) ON A ROUTINE FLIGHT, ELECTRICAL SMOKE FUMES WHERE NOTICED IN THE CABIN, PILOT INSPECTION REVEALED THE TURN CO-ORDI
- [SDR CA120105010](https://openairdocs.org/sdr/CA120105010), Jan 5, 2012: Cessna 172N. INDICATOR. INOPERATIVE. (CAN) WARNING FLAG NOT IN VIEW - GYRO NOT SPINNING. NO INDICATION OF TURN.
- [SDR IPXA11668279](https://openairdocs.org/sdr/IPXA11668279), Jul 27, 2011: Boeing 76734AF. INDICATOR. INOPERATIVE. EHSI WENT BLANK SOON AFTER TAKEOFF. REPLACED CAPTAIN'S EHSI AND OPS TEST COND. NORMAL IAW AMM 34-22-04-4. (N307UP)
- [SDR HALA2011070700314](https://openairdocs.org/sdr/HALA2011070700314), Jul 7, 2011: Boeing 7673G5. INDICATION SYS. MALFUNCTIONED. ETOPS SIGNIFICANT SYS - F/O ADI AND HSI ARE BLANK WITH SG FAIL MESSAGES DISPLAYED ON BOTH INDICATORS SELECTING ALT EFI C (N589HA)
- [SDR IPXA11566267](https://openairdocs.org/sdr/IPXA11566267), Apr 28, 2011: Boeing 75724APF. STATIC INVERTER. INOPERATIVE. STANDBY ATTITUDE, GYRO FLAG INTERMITTENTLY IN VIEW. FLIGHT DIVERTED, ENROUTE. R & R STATIC INVERTER IAW 34-24-02-4. R &  (N446UP)
- [SDR CA101230004](https://openairdocs.org/sdr/CA101230004), Oct 5, 2010: Cessna U206F. INDICATOR. FAILED. ON A FLIGHT, IT WAS NOTICED THAT THE TURN COORDINATOR HAD FAILED. THE INSTRUMENT WAS REPLACED AND NO FURTHER INCIDENT PR
- [SDR HSYA2010042810](https://openairdocs.org/sdr/HSYA2010042810), Apr 28, 2010: Cessna 208B. HSI. INOPERATIVE. AFTER TAKEOFF, THE CREW ADVISED BOTH THE CAPTAINS HSI AND RMI INDICATORS ROTATED NORMALLY AND THEN FROZE ON A 185 DEGREE (N936FE)
- [SDR UALA2010032601028](https://openairdocs.org/sdr/UALA2010032601028), Mar 26, 2010: Boeing 767322. GYRO. TUMBLES. STANDBY GYRO HAS TUMBLED, RTFL. REPLACED STANDBY ATTITUDE IND, GROUND CHECK NORMAL. (N655UA)
- [SDR HALA2009111700529](https://openairdocs.org/sdr/HALA2009111700529), Nov 17, 2009: Boeing 76733A. WARNING LIGHT. ILLUMINATED. ETOPS SIGNIFICANT SYS - DURING ILS APPROACH AMBER BAR APPEARED THROUGH LOC FMA SEVERAL TIMES DURING APPROACH, AFTER LAND (N591HA)
- [SDR HALA2009101300463](https://openairdocs.org/sdr/HALA2009101300463), Oct 13, 2009: Boeing 76733A. DISPLAY. MALFUNCTIONED. ETOPS SIGNIFICANT SYS - IFSD DISPLAY BLANKS THEN REINITIALIZES TO NORMAL OPERATIONS IN CRUISE. REPLACED ISFD IAW AMM34-2 (N593HA)
- [SDR 2007UALA03765](https://openairdocs.org/sdr/2007UALA03765), Sep 18, 2007: Boeing 737322. INDICATOR. INOPERATIVE. FLIGHT DIVERTED DUE TO AN INOP STANDBY ATTITUDE INDICATOR AND ORD WEATHER RESTRICTIONS. FOUND INOPERATIVE STANDBY ATTITU (N381UA)
- [SDR 07FDEA02246](https://openairdocs.org/sdr/07FDEA02246), Jun 21, 2007: Boeing 727227. INDICATOR. FAILED. DURING CLIMB-OUT STBY ATT IND 5 MORE NOSE UP THAN CAT/FO ADI'S SHORTLY THERE AFTER STBY ATT IND RAPID PRECESSION TO -25  (N491FE)
- [SDR KBM2006F00213](https://openairdocs.org/sdr/KBM2006F00213), Jun 26, 2006: Snias AS350BA. INDICATOR. INOPERATIVE. TURN AND SLIP, NEEDLE INOPERATIVE, REMOVED AND REPLACED. (K) (N1188P)
- [SDR NOCA04706](https://openairdocs.org/sdr/NOCA04706), Apr 28, 2006: Boeing 767300. INDICATOR. DEFECTIVE. STANDBY ATT INDICATOR SHOWS 3 DEGRESS TO THE RIGHT IN LEVEL FLIGHT. (N768NA)
- [SDR KBM2006F00131](https://openairdocs.org/sdr/KBM2006F00131), Aug 15, 2005: Snias AS350BA. SWITCH. STICKING. TURN AND BANK POWER SWITCH, STICKING. (K) (N350SH)
- [SDR KBM2005F00173](https://openairdocs.org/sdr/KBM2005F00173), Jul 26, 2005: Snias AS350BA. INDICATOR. NOISY. TURN AND BANK, UNIT MAKING LOUD NOISE, REMOVED AND REPLACED. (K) (N230SH)
- [SDR KBM2005F00142](https://openairdocs.org/sdr/KBM2005F00142), Jul 11, 2005: Snias AS350B2. INDICATOR. STUCK. TURN AND BANK, UNIT SLIP NEEDLE STUCK WILL NOT MOVE AT ALL. AIRCRAFT MEL UNTIL 7/20/05. (K) (N751H)
- [SDR 2005FA0000687](https://openairdocs.org/sdr/2005FA0000687), Jan 4, 2005: Cessna 206H. INDICATION SYS. INOPERATIVE. UNIT WAS INSTALLED IN AIRCRAFT ON 12/20/2004. AFTER APPROX .5 HOURS, PILOT OBSERVED TURN COORDINATOR OFF FLAG, MOMENTS L (N962AC)
- [SDR AALA20041111](https://openairdocs.org/sdr/AALA20041111), Nov 8, 2004: Doug DC982. DISPLAY. INOPERATIVE. EWR-MIA, LIGHT SMOKE WITH ELECTRIC BURNING SMELL AT CRUISE. EMERGENCY FIRE SMOKE CHECK LIST COMPLETED. SMOKE ABATED UNTI (N7522A)
- [SDR KBM2004F00238](https://openairdocs.org/sdr/KBM2004F00238), Oct 8, 2004: Snias AS350BA. INDICATOR. INOPERATIVE. TURN AND BANK INOPERATIVE, REMOVED AND REPLACED. (N230SH)
- [SDR KBM2004F00116](https://openairdocs.org/sdr/KBM2004F00116), Jul 12, 2004: Snias AS350B2. INDICATOR. INOPERATIVE. TURN AND BANK, WILL NOT POWER ON. MEL AC (DMI NR 19 DUE 7-20-04). (N115SH)
- [SDR KBM2004F00120](https://openairdocs.org/sdr/KBM2004F00120), Jun 20, 2004: Snias AS350B2. INDICATOR. INOPERATIVE. TURN COORDINATOR, INOPERATIVE. REMOVED AND REPLACED. (N115SH)
- [SDR MYW2004F00007](https://openairdocs.org/sdr/MYW2004F00007), Jun 7, 2004: Boeing 7378Q8. DISPLAY. SHORTED. DURING CRUISE, (ISFD) INTEGRATED STANDBY FLIGHT DISPLAY, DISPLAYED OUT OF ORDER MSG ONLY. AIRCRAFT DIVERTED. TROUBLESHOT (N739MA)
- [SDR BAQA093734](https://openairdocs.org/sdr/BAQA093734), Mar 9, 2004: Urocop EC135T1. INDICATOR. RATCHETING. INDICATOR IS RATCHETY AND STICKY. REPLACED WITH SERVICABLE UNIT. 03/11/2004 (N135LC)
- [SDR KBM2004F00038](https://openairdocs.org/sdr/KBM2004F00038), Feb 19, 2004: Snias AS350BA. INDICATOR. INOPERATIVE. TURN AND BANK INDICATOR, INOPERATIVE. REMOVED AND REPLACED. (N230SH)
- [SDR KBM2004F00081](https://openairdocs.org/sdr/KBM2004F00081), Jan 21, 2004: Bell 206B. INDICATOR. STICKS. TURN AND SLIP INDICATOR NEEDLE STICKS. REMOVED AND REPLACED WITH SERVICEABLE UNIT. (N667JM)
- [SDR 2004FA0000132](https://openairdocs.org/sdr/2004FA0000132), Jan 16, 2004: Piper PA28RT201. INDICATOR. FAILED. TURN COORDINATOR UNIT FAILED DURING IFR CONDITIONS. PROBLEM SEEMS TO BE INTERMITTENT BECAUSE AFTER LANDING, UNIT WORKED  (N8227V)
- [SDR BAQA091999](https://openairdocs.org/sdr/BAQA091999), Jan 12, 2004: Urocop EC135T1. INDICATOR. MALFUNCTIONED. TURN AND SLIP INDICATOR BACKLIGHTING INOPERATIVE. REPLACED WITH SERVICEABLE UNIT. (N911NH)
- [SDR KBM2004F00014](https://openairdocs.org/sdr/KBM2004F00014), Dec 23, 2003: Snias AS350BA. INDICATOR. MALFUNCTIONED. TURN AND SLIP INDICATOR MAKING NOISE AND EXCESSIVELY HOT, REMOVED AND REPLACED. (N1188P)
- [SDR KBM2003F00101](https://openairdocs.org/sdr/KBM2003F00101), Nov 17, 2003: Snias AS350B1. INDICATOR. INOPERATIVE. TURN INDICATOR IS INOPERATIVE. INSTALLED SERVICEABLE TURN CORDINATOR. (N53SH)
- [SDR KBM2003F00086](https://openairdocs.org/sdr/KBM2003F00086), Oct 31, 2003: Snias AS350B2. INDICATOR. NOISY. TURN COORDINATOR MAKES LOUD SQUEEKING NOISE. MEL NR 10. (N884SH)
- [SDR HEEA088510](https://openairdocs.org/sdr/HEEA088510), Jul 11, 2003: Bell 412. GYRO. MALFUNCTIONED. RATE TURN NEEDLE DISPLACED 1/2 STEP TO RIGHT. (N2149S)
- [SDR 2003FA0000598](https://openairdocs.org/sdr/2003FA0000598), May 15, 2003: Cessna T182T. CONNECTOR. IMPROPER. THE CONNECTOR FROM AIRCRAFT HARNESS THAT MATS TO THE TURN COORDINATOR HAS IMPROPERLY CRIMPED PINS. THIS FAULTY CONNECTIO (N529PT)
- [SDR 3144043003](https://openairdocs.org/sdr/3144043003), Apr 30, 2003: Snias AS350B3. INDICATOR. INOPERATIVE. T/ SLIP IND INOP. (N5226R)

All 153: https://openairdocs.org/jasc/3424/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 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)
- [JASC 3497](https://openairdocs.org/jasc/3497): Navigation System Wiring (269 reports)

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