# JASC 3252: Shimmy Damper

- Type: JASC system/component code (FAA)
- ATA chapter: 32 Landing Gear
- Title in the code table: SHIMMY DAMPER
- Service difficulty reports: 79
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=35
- Page: https://openairdocs.org/jasc/3252

## What it covers

The devices mounted on steerable wheel forks to reduce shimmy. Typical parts are seal, spring, housing, etc.

## Service difficulty reports (79, newest 50)

- [SDR AALA201907199010](https://openairdocs.org/sdr/AALA201907199010), Jul 18, 2019: Boeing 737823. SHIMMY DAMPENER. BROKEN. AIRCRAFT WAS GROUNDED: CREW DECLARED AN EMERGENCY INTO IAH ON ACCOUNT OF HYDRAULIC ISSUE. ENG 1 HYD LOW PRESSURE LIGHT I (N836NN)
- [SDR AALA201907149014](https://openairdocs.org/sdr/AALA201907149014), Jul 13, 2019: Boeing 737823. SHIMMY DAMPENER. EXCESS PLAY. AIRCRAFT WAS GROUNDED: PILOT REPORTS BRAKES CHATTERING STRONGLY AT LOW SPEED DIFFICULT TO STOP WITHOUT VIOLENT SHAKING.  (N945AN)
- [SDR 2019FA0000079](https://openairdocs.org/sdr/2019FA0000079), Mar 7, 2019: Boeing 73737Q. SHIMMY DAMPENER. FAILED. DURING LANDING ROLL AFTER NOSE GEAR CONTACT WITH THE RUNWAY HIGH VIBRATION STARTED. (NOTE: LEFT MLG SHIMMY DAMPER EVENT 
- [SDR 2017FA0000192](https://openairdocs.org/sdr/2017FA0000192), May 16, 2017: Cessna 182. BARREL. BROKEN. NOSE WHEEL SHIMMY DAMPENER BARREL ASSEMBLY. ATTACHMENT BOSS BROKE CAUSING SHIMMY DAMPENER TO LOSE ITS FLUID CAUSING LOSS (N6233A)
- [SDR ZP8R20160318002](https://openairdocs.org/sdr/ZP8R20160318002), Mar 9, 2016: Pilats PC1247E. SHIMMY DAMPENER. JAMMED. SHIMMY DAMPER WOULD NOT TEST PER CMM, INTERNALS JAMMED. UPON TEARDOWN INSPECTION SEVERAL DISCREPANCIES WERE DISCOVERED: 
- [SDR CALA2015042300321](https://openairdocs.org/sdr/CALA2015042300321), Apr 23, 2015: Boeing 737824. SHIMMY DAMPENER. UNSERVICEABLE. UPON LANDING WITH MAIN WHEELS ON THE GND & PRIOR TO NOSE WHEEL TOUCHING GND, EXPERIENCED EXCESSIVE SHIMMY. SEVERAL CEILI (N25201)
- [SDR GLBA2014110400463](https://openairdocs.org/sdr/GLBA2014110400463), Nov 2, 2014: Beech 1900D. SHIMMY DAMPENER. FAULTY. DURING TAXI OUT, THE CREW NOTED THAT THE ACFT WOULD NOT STEER TO THE RT WITH MAX DIFFERENTIAL BRAKING POWER & NOSE WHEEL (N202UX)
- [SDR CA140903010](https://openairdocs.org/sdr/CA140903010), Aug 29, 2014: Cessna 560XL. DAMPER. MISOVERHAULED. (CAN) THE DAMPER WAS REPAIRED AT A VENDOR IN 2011, AND WAS REASSEMBLED INCORRECTLY. IT WAS THEN INSTALLED BACKWARDS TO M
- [SDR CA131125002](https://openairdocs.org/sdr/CA131125002), Nov 21, 2013: Emb ERJ190100IGW. NUT. LOOSE. (CAN) LT AND RT MLG SHIMMY DAMPERS BOTH FOUND WITH LOOSE JAM AND FLANGED NUTS. MPN 2225-0070 AND 2225-0069, RESPECTIVELY
- [SDR USAA2012051400030](https://openairdocs.org/sdr/USAA2012051400030), May 12, 2012: Boeing 7374B7. SHIMMY DAMPENER. FAULTY. CREW REPORTED THE RIGHT BRAKE ON BOTH CAPT'S AND F/O PEDALS PULSE WITH LITTLE TO NO BRAKING AVAILABLE. MAINTENANCE REPLA (N434US)
- [SDR K5SR2012050123536](https://openairdocs.org/sdr/K5SR2012050123536), May 1, 2012: Cessna 560CESSNA. SHIMMY DAMPENER. LEAKING. AFT WAS LANDING WHEN A VIOLENT SHIMMY AND VIBRATION OCCURRED BETWEEN 40 TO 50 KTS, EMANATING FROM THE NOSE LANDING GEAR. (N330VP)
- [SDR CA111107006](https://openairdocs.org/sdr/CA111107006), Nov 7, 2011: Boeing 73776N. PISTON. CRACKED. (CAN) DURING A ROUTINE OVERHAUL OF THE SHIMMY DAMPER ASSY, PISTON WAS NOTED AS REQUIRED AND SEVERAL SMALL CRACKS WERE FO
- [SDR BSYA2010035](https://openairdocs.org/sdr/BSYA2010035), Jul 21, 2010: Piper PA31350. SHIMMY DAMPENER. BROKEN. AFTER TAKEOFF WHEN RETRACTING THE GEAR NOSE GEAR DID NOT GO UP ALL THE WAY, THE CAUSE WAS THE SHIMMY DAMPER ROD END BROK (N35453)
- [SDR CA090331005](https://openairdocs.org/sdr/CA090331005), Mar 17, 2009: Piper PA31350. SHIMMY DAMPENER. MALFUNCTIONED. (CAN) BENT SHIMMY DAMPER ROD CAUSED NOSE WHEEL TO JAM TO MAX. RT DEFLECTION AND WHEN GEAR WAS RETRACTED CAUSED MISALIGNM
- [SDR 2009FA0000096](https://openairdocs.org/sdr/2009FA0000096), Jan 23, 2009: Cessna 182E. ROLL PIN. BROKEN. PILOT REPORT: ON LANDING SEVERE NOSE WHEEL SHIMMY. FOUND ROLL PIN THAT SECURES PISTON TO DAMPER ROD BROKEN AT PISTON THE (N3309Y)
- [SDR CA080812002](https://openairdocs.org/sdr/CA080812002), Aug 8, 2008: Cessna 172RG. CLEVIS. BROKEN. (CAN) DAMPER SHAFT CLEVIS BROKE AT NOSE STRUT ATTACHMENT ALLOWING UNRESTRAINED MOTION OF SHIMMY DAMPER.
- [SDR COMA0770040](https://openairdocs.org/sdr/COMA0770040), Jul 18, 2007: Cndair CL6002C10. SHIMMY DAMPENER. WORN. MLG SHIMMY ON TAKEOFF AND GEAR RETRACTION. AIRCRAFT RETURNED BACK TO CVG AND LANDED SAFELY. REMOVED AND REPLACED RIGHT M (N378CA)
- [SDR COMA0770039](https://openairdocs.org/sdr/COMA0770039), Jul 18, 2007: Cndair CL6002C10. SHIMMY DAMPENER. WORN. FLIGHT 5058 - MLG SHIMMY ON TAKEOFF AND GEAR RETRACTION. AIRCRAFT RETURNED BACK TO CVG AND LANDED SAFELY. REMOVED AND RE (N378CA)
- [SDR GLBA20060914](https://openairdocs.org/sdr/GLBA20060914), Feb 19, 2007: Beech 1900D. SHIMMY DAMPENER. MISSING. UPON PRE-FLIGHT INSPECTION, PILOT REPORT OF SHIMMY DAMPENER DAMAGE/MISSING AND SUSPECTED DAMAGE TO STRUCTURE IN SURROUND (N220GL)
- [SDR KBM2006F00185](https://openairdocs.org/sdr/KBM2006F00185), May 6, 2006: Snias AS350B1. BEARING. WORN. DAMPERS, BEARINGS ARE WORN, REMOVED AND REPLACED. (K) (N53SH)
- [SDR SAI030603](https://openairdocs.org/sdr/SAI030603), Mar 21, 2006: Cessna 208B. ROLL PIN. SHEARED. DURING TAKE-OFF PILOT NOTED VIBRATION AND ABORTED TAKE-OFF. AIRCRAFT RETURNED TO RAMP. AIRCRAFT WAS INSPECTED AND FOUND  (N1119V)
- [SDR SWAA060316](https://openairdocs.org/sdr/SWAA060316), Jan 26, 2006: Boeing 7373H4. DAMPER. SHEARED. SEVERE VIBRATION FELT FROM RIGHT MLG. FOUND RIGHT MLG SHIMMY DAMPER BOLT SHEARED BETWEEN TORSION LINKS. REMOVED AND REPL (N370SW)
- [SDR CA051020002](https://openairdocs.org/sdr/CA051020002), Oct 19, 2005: Cndair CL600*. NUT. LOOSE. (CAN) CREW REPORTED MAINWHEEL SHIMMY ON LANDING. MAINTENANCE FOUND BOLT (ITEM 45)FROM THE RT MLG TORQUE LINK TO THE SHIM
- [SDR DJFA2005147](https://openairdocs.org/sdr/DJFA2005147), Oct 6, 2005: Beech 400A. SHIMMY DAMPENER. WORN. UPON ARRIVAL AFTER APPROACH AND NORMAL LANDING WITH NORMAL DECELERATION USING THRUST REVERSERS, AND AFTER ACHIEVING TAXI (N783TA)
- [SDR 2005FA0000913](https://openairdocs.org/sdr/2005FA0000913), May 25, 2005: Doug MD900. CAP. CRACKED. CAP IS CRACKED ON PORT SIDE. CATASTROPHIC FAILURE. MANFACTURE CAP FROM SOLID BLOCK OF MATERIAL INSTAD OF CASTING PART. (
- [SDR 2005FA0000912](https://openairdocs.org/sdr/2005FA0000912), May 25, 2005: Doug MD900. CYLINDER. DELAMINATED. CHROME HAS DELAMINATED IN CYLINDER BORE. IMPROPER PLATING. IMPROVE CHROME PLATING METHOD TO IMPROVE ADHESION TO CYLINDER
- [SDR CA050405003](https://openairdocs.org/sdr/CA050405003), Mar 21, 2005: Cessna 150L. SHIMMY DAMPENER. FAILED. (CAN) SHIMMY DAMPNER FAILED AT TAKEOFF CAUSING A VIBRATION. AIRCRAFT CAME TO REST WITH ONLY MINIMAL DAMAGE. SHIMMY DAMPN
- [SDR 2005FA0000143](https://openairdocs.org/sdr/2005FA0000143), Jan 26, 2005: Piper PA34200T. BOLT. MISINSTALLED. DURING RAMP INSPECTION, INSPECTOR NOTICED BOLT ATTACHING NOSE GEAR CENTERING DEVICE WAS INSTALLED INCORRECTLY, HEAD OF B (N249PM)
- [SDR CA040810005](https://openairdocs.org/sdr/CA040810005), Jul 19, 2004: Cessna 208B. SHIMMY DAMPENER. BROKEN. (CAN) SHIMMY DAMPENER BARREL END ENTIRELY BROKE OFF AT CIRCLIP GROOVE. ALL FLUID LOST,CIRCLIP MISSING, BROKEN PIECE MISS
- [SDR AUS20040056](https://openairdocs.org/sdr/AUS20040056), Jan 23, 2004: Beech 76. DAMPER. FAULTY. (AUS) NOSE WHEEL SHIMMY DAMPER END CAP RETAINING CIRCLIP MISSING.
- [SDR 1B](https://openairdocs.org/sdr/1B), Dec 20, 2002: Cessna U206C. SHIMMY DAMPENER. MISINSTALLED. SHIMMY DAMPENER SLIDING SHAFT INSTALLED 180 DEGREES OUT. UNIT WAS OVERHAULED. (N6506R)
- [SDR 2002FA0001300](https://openairdocs.org/sdr/2002FA0001300), Nov 6, 2002: Piper PA24250. BOLT. MISINSTALLED. BOLT WAS INSTALLED BACKWARDS ON SHIMMY DAMPNER. GEAR WAS LOWERED IN FLIGHT AND HUNG UP ON COWL LT V CHANNEL. SUBSEQUENT  (N6292H)
- [SDR 2002FA0001181](https://openairdocs.org/sdr/2002FA0001181), Oct 13, 2002: Lear 35A. COMPUTER. MALFUNCTIONED. NOSE WHEEL STEERING WILL NOT ARM. FOUND NO OUTPUT VOLTAGE ON P224 PIN A. 1.0 VAC REQUIRED FROM THIS PIN. (N10AH)
- [SDR AUS20020788](https://openairdocs.org/sdr/AUS20020788), Jul 11, 2002: Cessna 402B. BARREL. BROKEN. (AUS) NOSE LANDING GEAR SHIMMY DAMPER BODY BROKEN AWAY FROM ATTACHMENTLUG.
- [SDR CA020619002](https://openairdocs.org/sdr/CA020619002), Jun 18, 2002: Cessna 172R. SHAFT. SHEARED. (CAN) INVESTIGATION OF A SEVERE NOSEWHEEL SHIMMY REPORT REVEALED THAT THE SHIMMY DAMPENER SHAFT HAD SHEARED. BOTH HALVES
- [SDR CA020619003](https://openairdocs.org/sdr/CA020619003), May 8, 2002: Cessna 172P. SHAFT. SHEARED. (CAN) SEVERE NOSEWHEEL SHIMMY REPORTED AFTER LANDING. INSPECTION OF THE DEFECT BY MAINTENANCE REVEALED THAT THE SHAFT WA
- [SDR CA020513001](https://openairdocs.org/sdr/CA020513001), May 7, 2002: Mtsbsi MU2B60. ROD END. SEPARATED. (CAN) ROD END SEPARATED FROM PISTON.UNIT RETURNED TO VENDOR AND WAS OVERHAULED. SERVICE BULLETIN NR 169B EMBODIED TO PRE
- [SDR HEEA073107](https://openairdocs.org/sdr/HEEA073107), May 10, 2001: Snias AS350B. DAMPER. LEAKING. LEAKING AROUND SHAFT SEAL. (N972AE)
- [SDR 2002FA0000045](https://openairdocs.org/sdr/2002FA0000045), Apr 3, 2001: Cessna 310J. SHIMMY DAMPENER. DAMAGED. PILOT MADE A HARD LEFT TURN CAUSEING DAMAGE TO THE NOSE GEAR AREA. BENT ROD ON THE SHIMMY DAMPER CAUSING INTERNAL DAMAGE (N63GG)
- [SDR CA010426003](https://openairdocs.org/sdr/CA010426003), Mar 28, 2001: Pilats PC1245. STRAP. BROKEN. (CAN) NOSE GEAR BONDING STRAP P/N 532.20.12.262 WAS WRAPPED AROUND SHOCK STRUT P/N 571.10.12.353 AND HAD BENT THE STRUT 
- [SDR 20010323CW004](https://openairdocs.org/sdr/20010323CW004), Feb 27, 2001: Beech B19. SHIMMY DAMPENER. DEFECTIVE. FOUND MULITUDE OF (AIR) POCKETS AND AIRCRAFT SHIMMIED EXCESSIVELY ON LANDING AND TAXI. (N2048A)
- [SDR 20010328CW009](https://openairdocs.org/sdr/20010328CW009), Feb 24, 2001: Skrsky S76. TRANSPONDER. MELTED. IN CRUSE FLIGHT, SMOKE IN COCKPIT, ACRID SMELL IN COCKPIT. PHOTOCELL AND ADJACENT AREA OF CONTROL HEAD MELTED. (N705AL)
- [SDR AU000796](https://openairdocs.org/sdr/AU000796), Sep 4, 2000: Cessna 150F. DAMPER. FAULTY. (AUS) SHIMMY DAMPER LOW ON FLUID. ON FURTHER INVESTIGATION THE FOLLOWING COMPONENTS WERE FOUND TO BE DAMAGED: 1. HEAD BE
- [SDR 20000609SH028](https://openairdocs.org/sdr/20000609SH028), Apr 22, 2000: Cessna 172. SHIMMY DAMPENER. FAILED. AFTER LANDING, THE PIC WAS TAXIING TO THE RAMP WHEN THE NOSE WHEEL STARTED TO SHIMMY. HE APPLIED BRAKES AND THE AIRCRAFT (N6331E)
- [SDR 2000ZZZX614](https://openairdocs.org/sdr/2000ZZZX614), Feb 24, 2000: Cessna 177B. SHIMMY DAMPENER. BROKEN. AFTER REPLACING AN OLD SHIMMY DAMPENER WITH A NEW ONE AT APPROXIMATELY 100 HOURS IN SERVICE, THE NEW PART BROKE AT THE O (N35033)
- [SDR AGQA065695](https://openairdocs.org/sdr/AGQA065695), Feb 4, 2000: Hughes 369D. DAMPER. DISCHARGED. MAIN LANDING GEAR DAMPER IS LOW. (N5027P)
- [SDR AGQA065694](https://openairdocs.org/sdr/AGQA065694), Feb 4, 2000: Hughes 369D. DAMPER. DISCHARGED. MAIN LANDING DAMPER IS LOW. (N5027P)
- [SDR AU990795](https://openairdocs.org/sdr/AU990795), Jul 29, 1999: Cessna 172N. PIN. WRONG PART. (AUS) INCORRECT SHIMMY DAMPER PISTON ROLL PIN FITTED. A BRASS SCREW WAS USED INSTEAD OF THE CORRECT STEEL ROLL PIN. THE 
- [SDR 20000508SH002](https://openairdocs.org/sdr/20000508SH002), Jun 7, 1999: Beech C23. SHIMMY DAMPENER. FAILED. RETRIEVED SUBJECT SHIMMY DAMPENER FROM STOCK ROOM. ON FUNCTIONAL CHECK, DETERMINED MUCH WORSE THAN THE REMOVED UNIT. (N6639D)
- [SDR 20000508SH001](https://openairdocs.org/sdr/20000508SH001), Jun 7, 1999: Beech C23. SHIMMY DAMPENER. LEAKING. SHIMMY DAMPENER HAS NUMEROUS DEAD SPOTS (AIR INSIDE) WHEN ACTUATED. CAUSES NOSE WHEEL TO SHIMMY READ BAD. (X) (N6639D)

All 79: https://openairdocs.org/jasc/3252/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 (11,170 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 (2,685 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 (6,451 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 3251](https://openairdocs.org/jasc/3251): Steering Unit (338 reports)
- [JASC 3260](https://openairdocs.org/jasc/3260): Landing Gear Position and Warning (13,418 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 (2,407 reports)

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