# JASC 3251: Steering Unit

- Type: JASC system/component code (FAA)
- ATA chapter: 32 Landing Gear
- Title in the code table: STEERING UNIT
- Service difficulty reports: 338
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=35
- Page: https://openairdocs.org/jasc/3251

## What it covers

The actuator which turn the wheel(s) by a power source for controlling direction of movement on the ground. Typical parts are cylinder, seal, etc.

## Service difficulty reports (338, newest 50)

- [SDR N6WA2025112601](https://openairdocs.org/sdr/N6WA2025112601), Nov 24, 2025: Cndair CL6002C11. ACTUATOR. INOPERATIVE. STEERING INOPERATIVE IN FLIGHT. REMOVED AND REPLACED NLG STEERING ACTUATOR IAW AMM 32-51-10. OPS CHECKED GOOD. (N566GJ)
- [SDR VNAA2025090711101](https://openairdocs.org/sdr/VNAA2025090711101), Sep 5, 2025: Cndair CL6002D24. MANIFOLD. UNSERVICEABLE. STEERING INOP UPON TAKE OFF. FAULT HAPPENED UPON GEAR UP. / REPLACED STEERING MANIFOLD IAW AMM 32-51-50-400-801-A01. NO  (N596NN)
- [SDR AALA202508151170](https://openairdocs.org/sdr/AALA202508151170), Aug 13, 2025: Boeing 737823. WARNING SYSTEM. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: GEAR HANDLE WOULD RAISE ON TAKEOFF; AIRCRAFT EMERGENCY LANDED S (N903NN)
- [SDR VNAA2025012111101](https://openairdocs.org/sdr/VNAA2025012111101), Jan 19, 2025: Cndair CL6002D24. SELECTOR VALVE. UNSERVICEABLE. STEERING INOP CAUTION MSG UPON GEAR RETRACTION DEPARTING CLT / INTERROGATED MDC AND FOUND B1-007464 FROM WHEN A/C WAS IN (N614NN)
- [SDR VNAA2024120311102](https://openairdocs.org/sdr/VNAA2024120311102), Nov 24, 2024: Cndair CL6002D24. STEERING SYS. ABNORMAL. STEERING INOP CAUTION ON TAKEOFF CLIMB / PERFORMED MIPM RESET. MSG EXTINGUISHED. PROBLEM DID NOT REOCCUR. (N607NN)
- [SDR VNAA2024120311101](https://openairdocs.org/sdr/VNAA2024120311101), Nov 24, 2024: Cndair CL6002D24. STEERING SYS. ABNORMAL. STEERING INOP CAUTION MSG AFTER TAKEOFF / C/W MIPM RESET FOR STEERING INOP, FAULT DID NOT REOCCUR. (N607NN)
- [SDR VNAA2024041711103](https://openairdocs.org/sdr/VNAA2024041711103), Apr 14, 2024: Cndair CL6002C10. ACTUATOR. UNSERVICEABLE. NOSE WHEELS STEERING INOP CAUTION MSG IN FLIGHT / INTERROGATED MDC AND FOUND B1 CODE 007462. T/S IAW CRJ 700 FIM 32-52-0 (N705PS)
- [SDR VNAA202304061111](https://openairdocs.org/sdr/VNAA202304061111), Apr 5, 2023: Cndair CL6002D24. VALVE. UNSERVICEABLE. STEERING INOP CAUTION MESSAGE AFTER TAKEOFF / REMOVED AND REPLACED HYD 3 PRESSURE SWITCHES MT128/MT129 AND LANDING GEAR  (N605NN)
- [SDR VNAA202303031111](https://openairdocs.org/sdr/VNAA202303031111), Mar 1, 2023: Cndair CL6002D24. MANIFOLD. UNSERVICEABLE. STEERING INOP MSG 400 FT AGL AFTER / REMOVED AND REPLACED NWS MANIFOLD. PERFORMED EXT / RETRACTION OF NLG IAW CRJ 900 AM (N579NN)
- [SDR DALA2023022801518](https://openairdocs.org/sdr/DALA2023022801518), Feb 28, 2023: Boeing 757232. NOSE CONE. NONE. SHIP 0692 -ATO- DUE TO DIRECTIONAL CONTROL ISSUES ON TAKEOFF. CORRECTIVE ACTION: SERVICED STRUT PER B757 AMM. OPERATED R (N692DL)
- [SDR SWIA20230214](https://openairdocs.org/sdr/SWIA20230214), Feb 14, 2023: Cndair CL6002B19. NONE. WARNING MESSAGE. ON THE MISSED APPROACH, AFTER SELECTING GEAR UP, GOT A GEAR DISAGREE WARNING & NLG INDICATOR RED. RAN QRH PROCEDURE. GEA (N933EV)
- [SDR YENA2022112801156](https://openairdocs.org/sdr/YENA2022112801156), Nov 25, 2022: Emb ERJ190100IGW. STEERING SYS. WARNING MESSAGE. FLT#195, HPN-MCO. 'STEER FAIL ON APPROACH; NOTED ACTIVE FC 45452175CMC. ACCOMPLISH FIM TASK 45-45-00-810-973-A. TRANSITO (N354JB)
- [SDR CALA2022100602725](https://openairdocs.org/sdr/CALA2022100602725), Oct 6, 2022: Airbus A319132. SPRING ASSY. MISSING. PDA 3 NLG TOWING BOX BYPASS LEVER ONE SPRING CLIP MISSING (OUT OF TWO) -- SEE PHOTO PHOTO ADDED INSTALLED NEW SPRING CLI (N877UA)
- [SDR CALA2022100602724](https://openairdocs.org/sdr/CALA2022100602724), Oct 5, 2022: Airbus A320232. SPRING ASSY. MISSING. PDA 3 NLG TOWING BOX LEVER HAS BOTH SPRING CLIPS MISSING -- SEE PHOTO PHOTO ADDED INSTALLED BOTH NEW SPRING CLIPS ON NLG (N493UA)
- [SDR DALA2022090906002](https://openairdocs.org/sdr/DALA2022090906002), Sep 8, 2022: Airbus A330323. NONE. NONE. SHIP 3304 AT 4000' ECAM WHEEL N/W STRG FAULT. AFTER LANDING PER QRH STOPPED ON RWY RESET A/SKID AND N/W STRG. RESET SUCC (N804NW)
- [SDR CALA2022090502283](https://openairdocs.org/sdr/CALA2022090502283), Sep 5, 2022: Airbus A300*. NONE. FAULTY. NW STEER FAULT DISPLAYED ON UPPER ECAM SCREEN. - WHEEL FOUND FAULT FOR STEERING ELECTRO-HYD MODULE 325151. PERFORMED WIR (N485UA)
- [SDR CALA2022082402162](https://openairdocs.org/sdr/CALA2022082402162), Aug 24, 2022: Airbus A320232. SPRING. MISSING. PDA 3 NOSE GEAR BYPASS LEVER ONE SPRING CLIP MISSING OUT OF TWO...SEE PHOTO PHOTO ADDED INSTALLED NEW SPRING CLIP AT NLG (N457UA)
- [SDR DALA2022081605532](https://openairdocs.org/sdr/DALA2022081605532), Aug 16, 2022: Boeing 717200. NONE. NONE. SHIP 9512 -HYD/GEAR- AN EMERGENCY WAS DECLARED FOR THE APPROACH AND LANDING IN BTR FOLLOWING THE LOSS OF THE RIGHT HYDRA (N953AT)
- [SDR 9JLA2022072822982](https://openairdocs.org/sdr/9JLA2022072822982), Jul 21, 2022: Gulstm GIV. ACTUATOR. LEAKING. THE BASE MAINTENANCE TEAM FOUND DURING POST-FLIGHT CHECKS THE STEERING UNIT LEAKING. THE MAINTENANCE PROVIDER REMOVED TH (N120SB)
- [SDR VNAA202207191111](https://openairdocs.org/sdr/VNAA202207191111), Jul 18, 2022: Cndair CL6002C10. MANIFOLD. WARNING MESSAGE. AFTER TAKE-OFF FROM OAJ ON CLIMB AROUND 600-700FT, THE CREW GOT A STEERING INOP INDICATOR MESSAGE. THEY IMMEDIATELY BEGA (N520DC)
- [SDR CALA2022071501765](https://openairdocs.org/sdr/CALA2022071501765), Jul 15, 2022: Airbus A320232. NONE. MISSING. PDA 3 ONE SPRING CLIP BROKEN/MISSING ON NOSE GEAR ELECT BOX TOWING LEVER...SEE PHOTO PHOTO ADDED PARTS ADDED REF IPC 32- (N458UA)
- [SDR DALA2022071504901](https://openairdocs.org/sdr/DALA2022071504901), Jul 11, 2022: Boeing 737. METERING VALVE. INOPERATIVE. SHIP 3801 -ATO- DUE TO AIRCRAFT PULLING TO RIGHT ON TAKEOFF. CORRECTIVE ACTION: REPLACED METERING VALVE AND LEFT STEERIN (N801DZ)
- [SDR SIMA20220703002](https://openairdocs.org/sdr/SIMA20220703002), Jul 3, 2022: Emb ERJ170200LR. EICAS. FAULTY. AT ROTATION EICAS MSG AIR-GROUND FAIL E1 E2 REV DISAGREE EMERGENCY DECLARED. -C/A- RAR W019 HARNESS & NLG WOW SWITCH IAW (N670AE)
- [SDR P5CA2022061600141](https://openairdocs.org/sdr/P5CA2022061600141), Jun 16, 2022: Boeing 777FZB. STEERING SYS. WARNING MESSAGE. CONFIG MASTER WARNING MAIN GEAR STEERING ECIAS MSG(TRANSFER TO MDDR #167143 CAT "C" DUE DATE 26 JUN 22 IAW MEL 32-53-01) (N775SA)
- [SDR VNAA202206151111](https://openairdocs.org/sdr/VNAA202206151111), Jun 12, 2022: Cndair CL6002C10. PRESSURE SWITCH. BENT. JUST AFTER TAKEOFF AT FL500 CREW GOT NWS MESSAGE AND THEY CONTINUED TO CLIMB TO FL5000. CREW RAN THE QRH AND DECIDED TO  (N520DC)
- [SDR A6WA202206098191](https://openairdocs.org/sdr/A6WA202206098191), Jun 9, 2022: Cndair CL6002B19. STEERING SYS. WARNING MESSAGE. STEERING INOP CAUT MSG ABOUT 15 MIN AFTER TO. C/W QRH MSG RETURNED AFTER STEERING SWITCH RESET. ATTEMPTED MULTIPLE CYCLE (N443AW)
- [SDR F3LA2022060800055](https://openairdocs.org/sdr/F3LA2022060800055), Jun 7, 2022: Airbus A320214. PLUG. LOOSE. DISCREPANCY: REFERENCE LP236579 ITEM ; AC DOES NOT TURN TO LEFT ON TAXI UNTIL TILLER AT 20° CORRECTIVE ACTION: PERFORMED (N232FR)
- [SDR A6WA202205188185](https://openairdocs.org/sdr/A6WA202205188185), May 29, 2022: Cndair CL6002B19. STEERING SYS. WARNING LIGHT. RECEIVED STEERING INOP CAUTION MSG IN FLIGHT. C/W QRH MSG PERSISTED. C/W FIM RESET MSG REMAINED. ***AIRCRAFT REMOVED FRO (N436AW)
- [SDR DALA2022052403617](https://openairdocs.org/sdr/DALA2022052403617), May 23, 2022: Airbus A330323. NONE. NONE. SHIP 3301 -MISC/DE- DUE TO ECAM "WHEEL N/W STEERING FAULT" MESSAGE. ON LANDING, RESET A/SKID & N/W STRG SWITCH & STEERIN (N801NW)
- [SDR FDEA202205181255](https://openairdocs.org/sdr/FDEA202205181255), May 18, 2022: Doug MD11F. CYLINDER. FAILED. TAXI OUT WAS FINE. ON TAXI IN, FIRST RIGHT HAND TURN NOTICED ABOUT HALF WAY THROUGH THE RIGHT TURN, TILLER BECAME IN EFF (N588FE)
- [SDR DALA2022051003262](https://openairdocs.org/sdr/DALA2022051003262), May 8, 2022: Airbus A330223. NONE. NONE. SHIP 3358 ON LANDING NOSE WHEEL SHIMMY WAS PRONOUCED SHAKING OF AIRCRAFT. CORRECTIVE ACTION: R/R BOTH NOSE WHEEL ASSY AS (N858NW)
- [SDR DALA2022051003259](https://openairdocs.org/sdr/DALA2022051003259), May 7, 2022: Airbus A330323. NONE. NONE. SHIP 3301 WHEEL N/W STRG FAULT DURING N/W TAXI LOST NWS. CLEARED N/S NWS SW AND CAME BACK. BNS SYS 1 FAULT. CORRECTIVE A (N801NW)
- [SDR A6WA202205078178](https://openairdocs.org/sdr/A6WA202205078178), May 7, 2022: Cndair CL6002B19. SERVO VALVE. WARNING LIGHT. IN FLIGHT RECEIVED STEERING INOP CAUTION C/W QRH WOULD NOT RESET, WITH GEAR DOWN IN FLIGHT OR ON GROUND WOULD NOT RESET. (N456ZW)
- [SDR FDEA202205021100](https://openairdocs.org/sdr/FDEA202205021100), May 2, 2022: Boeing 767300. NONE. NONE. AFTER LANDING RWY 15 PANC CLEARED RUNWAY AND COULD NOT STEER AIRCRAFT. STOPPED AIRCRAFT AND CALLED MX. MX CHECKED NOSE G (N120FE)
- [SDR VNAA202205031111](https://openairdocs.org/sdr/VNAA202205031111), Apr 30, 2022: Cndair CL6002D24. NONE. NONE. INTERROGATED MDC FOUND B1 CODE 007465. REMOVED AND REPLACED NWS MANIFOLD IAW CRJ 900 AMM 32-51-50-000/400-801. PERFORMED (N581NN)
- [SDR DALA2022042702965](https://openairdocs.org/sdr/DALA2022042702965), Apr 26, 2022: Airbus A330323. SWITCH. FAULT MESSAGE. SHIP 3321 ON TAXI OUT N/WS DISCONNECT AMBER ECAM. STOPPED AIRCRAFT. RESET NOSE WHEEL STEERING SWITCH AND LIGHT WENT OUT. (N821NW)
- [SDR DALA2022040702414](https://openairdocs.org/sdr/DALA2022040702414), Apr 6, 2022: Airbus A330323. STEERING SYS. FALSE INDICATION. SHIP 3320 ON TAXI OUT LOST NOSEWHEEL STEERING. STOPPED ON TAXIWAY, RESET A/SKID & N/W STRG SWITCH. CORRECTIVE ACTION: NO (N820NW)
- [SDR DALA2022040102228](https://openairdocs.org/sdr/DALA2022040102228), Apr 1, 2022: Airbus A319114. COMPUTER. FAULTY. SHIP 3148 - DIV - TO JFK DUE TO NOSEWHEEL STEERING FAULT AFTER GEAR EXTENSION FOR LANDING AT LGA. SYSTEM FAULTS STEERING (N348NB)
- [SDR CALA2022033100852](https://openairdocs.org/sdr/CALA2022033100852), Mar 31, 2022: Airbus A320232. NONE. MISSING. PDA 3 NLG TOWING ELECT BOX LEVER MISSING SPRING CLIP -- SEE PHOTO PHOTO ADDED INSTALLED NEW SPRING CLIP ON NLG ELECT BOX (N409UA)
- [SDR VNAA202203261111](https://openairdocs.org/sdr/VNAA202203261111), Mar 23, 2022: Cndair CL6002D24. MANIFOLD. UNSERVICEABLE. ON APPROACH INTO CLT, NOSE WHEEL STEERING INOP MESSAGE WAS RECEIVED. THEY NOTIFIED ATC AND ATC DECLARED AN EMERGENCY FOR (N548NN)
- [SDR CALA2022032300769](https://openairdocs.org/sdr/CALA2022032300769), Mar 23, 2022: Airbus A320232. NONE. MISSING. PDA 3 NLG ELECTRIC BOX LEVER MISSING BOTH SPRING CLIPS...SEE PHOTO PHOTO ADDED PARTS ADDED PER IPC 32-51-12-01E INSTALLE (N469UA)
- [SDR DALA2022032101858](https://openairdocs.org/sdr/DALA2022032101858), Mar 19, 2022: Airbus A330323. NOT REPORTED. NOT REPORTED. SHIP 3301 AFTER LANDING NOSE WHEEL STEERING VIA TILLER WAS INOP. CYCLED A/ SKID + N/W STRG SWITCH AND SYSTEM WAS RESTORE (N801NW)
- [SDR N6WA2022031501](https://openairdocs.org/sdr/N6WA2022031501), Mar 14, 2022: Cndair CL600*. CONNECTOR. LOOSE. STEERING INOP MASTER CAUTION IN FLIGHT. TROUBLESHOOT AND FOUND CONNECTORS AT STEERING MANIFOLD WERE LOOSE. RECONNECTED C (N558GJ)
- [SDR VNAA202203081114](https://openairdocs.org/sdr/VNAA202203081114), Mar 4, 2022: Cndair CL6002D24. MANIFOLD. FAULT MESSAGE. AFTER TAKEOFF - NOSEWHEEL INOP CAUTION. RTB CLT. PERFORMED SYSTEM RESET AFTER LANDING. REMOVED AND REPLACED NOSE WHEEL S (N603NN)
- [SDR N6WA2022021601](https://openairdocs.org/sdr/N6WA2022021601), Feb 14, 2022: Cndair CL600*. STEERING SYS. NONE. STEERING INOP CAUTION MSG DURING FLIGHT. OPERATIONAL CHECK OF NLG STEERING IAW CRJ-550-AMM 32-51-00. OK FOR SERVICE AT T (N541GJ)
- [SDR CALA2022021100365](https://openairdocs.org/sdr/CALA2022021100365), Feb 10, 2022: Boeing 777224. STEERING SYS. FAILED. MAIN GEAR STEERING EICAS ON TAKEOFF COMPLIED WITH MEL FOR LOCKING STEERING ACT. ALL MEL TASK ACCOMPLISHED REFERENCE FIM  (N69020)
- [SDR SWIA202263823](https://openairdocs.org/sdr/SWIA202263823), Jan 16, 2022: Cndair CL600*. NONE. INOPERATIVE. STEERING INOP CAUTION MESSAGE WHEN EXTENDING LANDING GEAR. QRH UNHELPFUL. NOSE GEAR WOULD NOT RETRACT FULLY AFTERWARDS,  (N740EV)
- [SDR N6WA2021121401](https://openairdocs.org/sdr/N6WA2021121401), Dec 12, 2021: Cndair CL600*. STEERING SYS. NONE. NLG STEERING INOP CAUTION MSG. LUBRICATED NLG IAW CRJ 550 AMM 12-20-32. STEERING OPS CHECK GOOD IAW CRJ 550 AMM 32-51-00 (N519GJ)
- [SDR A6WA202111167972](https://openairdocs.org/sdr/A6WA202111167972), Nov 15, 2021: Cndair CL6002B19. NONE. NONE. ON TAKE OFF RECEIVED STEERING INOP AND WOW INPUT CAUTION MESSAGES CYCLED NOSE WHEEL STEERING MESSAGE REMAINS. AFTER GEAR (N446AW)
- [SDR A6WA202110297944](https://openairdocs.org/sdr/A6WA202110297944), Oct 29, 2021: Cndair CL6002B19. NONE. NONE. WHILE ENROUTE TO KORD THE FLIGHT CREW RECEIVED A NOSE WHEEL STEERING INOP CAUTION MESSAGE. THE CREW FOLLOWED THE QRH AND (N419AW)

All 338: https://openairdocs.org/jasc/3251/reports.md

## Other codes in chapter 32

- [JASC 3200](https://openairdocs.org/jasc/3200): Landing Gear System (862 reports)
- [JASC 3201](https://openairdocs.org/jasc/3201): Landing Gear/Wheel Fairing (45 reports)
- [JASC 3210](https://openairdocs.org/jasc/3210): Main Landing Gear (1,879 reports)
- [JASC 3211](https://openairdocs.org/jasc/3211): Main Landing Gear Attach Section (1,177 reports)
- [JASC 3212](https://openairdocs.org/jasc/3212): Emergency Flotation Section (759 reports)
- [JASC 3213](https://openairdocs.org/jasc/3213): Main Landing Gear Strut/Axle/Truck (2,210 reports)
- [JASC 3220](https://openairdocs.org/jasc/3220): Nose/Tail Landing Gear (1,842 reports)
- [JASC 3221](https://openairdocs.org/jasc/3221): Nose/Tail Landing Gear Attach Section (256 reports)
- [JASC 3222](https://openairdocs.org/jasc/3222): Nose/Tail Landing Gear Strut/Axle (2,074 reports)
- [JASC 3230](https://openairdocs.org/jasc/3230): Landing Gear Retraction/Extension System (11,171 reports)
- [JASC 3231](https://openairdocs.org/jasc/3231): Landing Gear Door Retract Section (2,248 reports)
- [JASC 3232](https://openairdocs.org/jasc/3232): Landing Gear Door Actuator (740 reports)
- [JASC 3233](https://openairdocs.org/jasc/3233): Landing Gear Actuator (2,686 reports)
- [JASC 3234](https://openairdocs.org/jasc/3234): Landing Gear Selector (2,085 reports)
- [JASC 3240](https://openairdocs.org/jasc/3240): Landing Gear Brake System (6,453 reports)
- [JASC 3241](https://openairdocs.org/jasc/3241): Brake Anti-Skid Section (1,310 reports)
- [JASC 3242](https://openairdocs.org/jasc/3242): Brake (1,696 reports)
- [JASC 3243](https://openairdocs.org/jasc/3243): Master Cylinder/Brake Valve (445 reports)
- [JASC 3244](https://openairdocs.org/jasc/3244): Tire (2,748 reports)
- [JASC 3245](https://openairdocs.org/jasc/3245): Tire Tube (390 reports)
- [JASC 3246](https://openairdocs.org/jasc/3246): Wheel/Ski/Float (2,489 reports)
- [JASC 3250](https://openairdocs.org/jasc/3250): Landing Gear Steering System (2,362 reports)
- [JASC 3252](https://openairdocs.org/jasc/3252): Shimmy Damper (79 reports)
- [JASC 3260](https://openairdocs.org/jasc/3260): Landing Gear Position and Warning (13,422 reports)
- [JASC 3270](https://openairdocs.org/jasc/3270): Auxiliary Gear (Tail Skid) (84 reports)
- [JASC 3297](https://openairdocs.org/jasc/3297): Landing Gear System Wiring (2,408 reports)

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