# JASC 2215: Autopilot Main Servo

- Type: JASC system/component code (FAA)
- ATA chapter: 22 Auto Flight
- Title in the code table: AUTOPILOT MAIN SERVO
- Service difficulty reports: 267
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=18
- Page: https://openairdocs.org/jasc/2215

## What it covers

The unit mechanically connected to primary flight control actuating mechanisms, which is used to mechanically reposition control surfaces in accordance with electrical or pneumatic signals from a controller.

## Service difficulty reports (267, newest 50)

- [SDR QR9R20220901001](https://openairdocs.org/sdr/QR9R20220901001), Sep 1, 2022: Bolkms BK117C2. NONE. WARNING LIGHT. ACTUATOR LIGHT CAME ON AND WOULD NOT RESET. T/F EVALUATION REVEALED AUTOPILOT TEST FAILED WITH YAW SAS AND BACKUP SAS CA
- [SDR 2022FA0000211](https://openairdocs.org/sdr/2022FA0000211), Apr 14, 2022: Pilats PC1245. NONE. FALSE ACTIVATION. PILOT REPORTED AN UNCOMMANDED TRIM NOSE DOWN WHEN ENGAGING AUTOPILOT. PROBLEM REOCCURRED REGARDLESS OF FLIGHT DIRECTOR C (N554VR)
- [SDR QR9R20211227005](https://openairdocs.org/sdr/QR9R20211227005), Dec 27, 2021: Bolkms BK117C2. NONE. FAULT MESSAGE. DURING ACF P/U, ACTUATOR LIGHT ILLUMINATED. TEST FLIGHT : DURING AP TEST ACTUATOR AND AP2 CAUTION MESSAGE DISPLAYED ON C
- [SDR QR9R20211022005](https://openairdocs.org/sdr/QR9R20211022005), Oct 22, 2021: Bolkms BK117C2. ACTUATOR. WARNING LIGHT. DURING APPROACH, ACTUATOR LIGHT ILLUMINATED ON CAD. T/F EVALUATION REVEALED AFTER TAKE OFF THE ACTUATOR LIGHT ILLUMINATE
- [SDR QR9R20211022004](https://openairdocs.org/sdr/QR9R20211022004), Oct 22, 2021: Bolkms BK117C2. ACTUATOR. WARNING LIGHT. ACTUATOR CAUTION LIGHT ILLUMINATED DURING FLIGHT. MTF EVALUATION: ACTUATOR LIGHT ILUMINATED ON CAD WITH YAW CAUTION ON P
- [SDR 2018FA0000405](https://openairdocs.org/sdr/2018FA0000405), Sep 22, 2018: Cessna 172F. SERVO. BINDING. ELEVATOR AND AILERON SERVO'S STUCK IN FLIGHT. OWNER/PILOT CLEARED WITH FORCE. REMOVED OLD UNIT AND REPLACED WITH MANUFAC
- [SDR FDEA2018081752046](https://openairdocs.org/sdr/FDEA2018081752046), Aug 15, 2018: Boeing 75728A. SERVO VALVE. FAILED. DURING DESCENT FROM 15,000 TO 11,000 IN VERT SPEED WITH -1 300 FPM SELECTED, ON THE LEFT AUTOPILOT, THE AIRCRAFT PUSHED  (N968FD)
- [SDR RU3A20170918028](https://openairdocs.org/sdr/RU3A20170918028), Sep 15, 2017: Beech 300LW. SERVO. OUT OF ADJUST. AUTOPILOT MADE UN-COMMANDED MOMENTARY PITCH INPUTS AT FL230 AND THEN AGAIN AT 4000'MSL. FOUND ELEVATOR TRIM SERVO CLUTCH (N78)
- [SDR ASOA201701051542](https://openairdocs.org/sdr/ASOA201701051542), Jan 5, 2017: Cndair CL6002C10. SERVO. ROUGH. AFTER TURNING AUTO PILOT OFF TO LAND, PITCH CONTROL OF THE AIRCRAFT WAS DIFFICULT. WHILE PULLING ON THE YOKE TO PITCH UP (N615QX)
- [SDR 2017FA0000425](https://openairdocs.org/sdr/2017FA0000425), Sep 30, 2016: Cessna S550. SERVO. DEFECTIVE. AT 40000 FT THE AP STARTING PORPOISING SO THE AP WAS TURNED OFF BUT THE ACFT WOULD NOT TRIM PROPERLY. THE ACFT WAS DIVER (N323JR)
- [SDR 2016FA0000310](https://openairdocs.org/sdr/2016FA0000310), Jun 27, 2016: Diamon DA40. CLAMP. CRACKED. DURING A ROUTINE 100 HR INSPECTION, THE TECH DISCOVERED THAT THE PITCH SERVO BRIDLE CLAMP WAS CRACKED BUT STILL ATTACHED (N265PS)
- [SDR 2016FA0000309](https://openairdocs.org/sdr/2016FA0000309), Jun 27, 2016: Diamon DA40. CLAMP. CRACKED. DURING A ROUTINE 100 HR INSPECTION, THE TECH DISCOVERED THAT THE PITCH SERVO BRIDLE CLAMP WAS CRACKED BUT STILL ATTACHED (N265PS)
- [SDR 2016FA0000296](https://openairdocs.org/sdr/2016FA0000296), Jun 8, 2016: Diamon DA40. CLAMP. CRACKED. DURING A ROUTINE 100 HR INSPECTION, THE TECH DISCOVERED THAT THE ROLL SERVO BRIDLE CLAMP WAS CRACKED BUT STILL ATTACHED  (N910XD)
- [SDR 2016FA0000297](https://openairdocs.org/sdr/2016FA0000297), May 17, 2016: Diamon DA40. CLAMP. CRACKED. DURING A ROUTINE 100 HR INSPECTION THE TECH DISCOVERED THAT THE PITCH SERVO BRIDLE CLAMP WAS CRACKED BUT STILL ATTACHED  (N605SJ)
- [SDR CWQR20160216002](https://openairdocs.org/sdr/CWQR20160216002), Feb 16, 2016: Cessna 560XL. PULLEY BRACKET. CRACKED. DURING A SCHEDULED INSPECTION WE FOUND THE AUTOPILOT SERVO CABLE PULLEY BRACKET CRACKED. THE CRACK WAS THROUGH ONE ATTAC (N551QS)
- [SDR AALA20160112006](https://openairdocs.org/sdr/AALA20160112006), Jan 11, 2016: Doug DC982. DRIVE ASSY. FAULTY. AIRCRAFT WAS GNDED. EMER DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT. AUTO PILOT DISCONNECTED MULTIPLE TIMES DURI (N7528A)
- [SDR CA151218002](https://openairdocs.org/sdr/CA151218002), Dec 14, 2015: Pilats PC1247E. SERVO. FAILED. (CAN) LT & RT WING DOWN HOLD CAS MSGS. AILERON, BANK CONTROL WAS EXTREMELY DIFFICULT. REPLACED AILERON SERVO. FUNCTION T
- [SDR CA150324003](https://openairdocs.org/sdr/CA150324003), Mar 23, 2015: Cndair CL6002B19. ACTUATOR. FAILED. (CAN) AFTER DEPARTURE NR 1 YD KICKED OFF LINE AND CREW REPORTS PULSING/JERKING FELT IN THE RUDDER SYS IN FLT WITH AND WI
- [SDR AALA20150112026](https://openairdocs.org/sdr/AALA20150112026), Jan 12, 2015: Doug DC982. SERVO. FAILED. EMERGENCY DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT. DURING DESCENT EXPERIENCED ALTERNATE TRIM MALFUNCTION. WHE (N467AA)
- [SDR AALA20141031004](https://openairdocs.org/sdr/AALA20141031004), Oct 31, 2014: Boeing 737823. ACTUATOR. OBSTRUCTED. AIR INTERRUPT INFLIGHT WHEN TURNING RT WITH MANUAL CONTROL THERE WAS A HESITATION IN ROLL RESPONSE. AIRPLANE WAS CONTROL (N939AN)
- [SDR 9JLA2014091005063](https://openairdocs.org/sdr/9JLA2014091005063), Sep 5, 2014: Beech 400A. SERVO. WEAK. AN INTERMITTENT YAW DAMPENER FAULT, INDICATING THAT THE AUTO PILOT WOULD TRIP OFF WHILE IN TURBULENCE. TROUBLESHOOTING F (N314TL)
- [SDR SIMA20140905004](https://openairdocs.org/sdr/SIMA20140905004), Sep 5, 2014: Cndair CL6002C10. SERVO. FAULTY. ON SHORT FINAL APPROX 1000 FEET MOMENTARY FIXED PITCH, TRIM OPERATIVE. ELEVATOR FELT JAMMED THEN RELEASED & OPERATED NOR (N524AE)
- [SDR CA140912016](https://openairdocs.org/sdr/CA140912016), Sep 1, 2014: Cndair CL6002C10. ACTUATOR. FAILED. (CAN) CREW REPORTED AN UNCOMMANDED YOKE MOVEMENT. MAINTENANCE INITIALLY REPLACED THE STALL PROTECTION COMPUTER, PN C1285
- [SDR 7GMB2014052911781](https://openairdocs.org/sdr/7GMB2014052911781), May 29, 2014: Emb EMB145XR. CONTROL SERVO. FAILED. AUTOPILOT FAIL & YAW DAMPER FAIL EICAS MSGS OBSERVED ON GND. TROUBLE SHOT & OBSERVED ELEVATOR SERVO FAULT CODE ON CMC. R (N286DP)
- [SDR SWIA201436143](https://openairdocs.org/sdr/SWIA201436143), Jan 27, 2014: Cndair CL6002B19. SERVO. FAILED. AIRPLANE EXPERIENCED AN UNCOMMANDED PITCH DOWN. FLT 6472 REPLACED THE ELEVATOR SERVO PN ON 622-5027-001, SN ON 3018, PN  (N969SW)
- [SDR SWIA201435980](https://openairdocs.org/sdr/SWIA201435980), Jan 13, 2014: Cndair CL6002B19. SERVO. FAILED. AUTOPILOT PITCHES UP & DOWN AGGRESSIVELY WHEN ENGAGED DURING CLIMB OUT. HAD TO DISENGAGE IMMEDIATELY & HAND FLY WITH AUT (N988CA)
- [SDR A6WA201312114048](https://openairdocs.org/sdr/A6WA201312114048), Dec 14, 2013: Cndair CL6002B19. SERVO. FAULTY. WO 203468 WC 5, 10, 11, & 12. AUTOPILOT WAS LAGGING IN RESPONSE TO FLIGHT DIRECTOR. WE FOUND THE ELEVATOR SERVO TO FAIL  (N436AW)
- [SDR SWIA201335035](https://openairdocs.org/sdr/SWIA201335035), Oct 24, 2013: Cndair CL6002B19. SERVO VALVE. FAILED. AILERON CONTROL SEEMED LIKE IT'S STICKING DURING INITIAL ROLL DURING APPROACH TO LANDING. FLT 5246 REPLACED THE AILERON  (N983SW)
- [SDR CALA2013102392332](https://openairdocs.org/sdr/CALA2013102392332), Sep 21, 2013: Boeing 767322. SERVO VALVE. FAULTY. LT AUTOPILOT DISCONNECTED TWICE DURING CLIMB OUT. RT AP OPERATES NORMALLY. R & R EAS SERVO VLV FOR CNTR SERVO IAW AMM 22 (N660UA)
- [SDR AALA20130920007](https://openairdocs.org/sdr/AALA20130920007), Sep 20, 2013: Boeing 757223. SERVO. LEAKING. MIA CREW REPORTED LT HYD FLUID LOSS IN FLIGHT. FLIGHT RETURNED MIA LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVIC (N187AN)
- [SDR SWIA201334250](https://openairdocs.org/sdr/SWIA201334250), Aug 11, 2013: Cndair CL6002C10. MOUNT. FAILED. AUTO PILOT SEEMS TO ENGAGE IN THE VERTICAL PITCH CONTROL. THE AIRCRAFT ROLLS, GETTING AP TRIM RWD & LWD MESSAGES. FLT#45 (N614SK)
- [SDR SWIA201333129](https://openairdocs.org/sdr/SWIA201333129), Mar 29, 2013: Cndair CL6002B19. SERVO. FAILED. ON SHORT FINAL A/C PITCHED DOWN AND NEITHER YOKE COULD BE PULLED BACK. AUTOPILOT HAD BEEN DISCONNECTED. AT 200 FT AGL YO (N437SW)
- [SDR SWIA201332989](https://openairdocs.org/sdr/SWIA201332989), Mar 12, 2013: Cndair CL6002B19. SERVO. FAILED. AUTO PILOT WHEN ENGAGED CAUSED A/C TO PITCH UP EXCESSIVELY ON ITS OWN AND OSCILLATE. (FLT 6379) REPLACED AUTOPILOT AILER (N935SW)
- [SDR SIMA20130311006](https://openairdocs.org/sdr/SIMA20130311006), Mar 11, 2013: Emb EMB135LR. SERVO. MALFUNCTIONED. ON FLIGHT 4513 - THE CREW REPORTED THE ELEVATOR FLUCTUATED IN MODERATE TURBULENCE. THE AIRCRAFT LANDED WITHOUT INCIDENT. (N722AE)
- [SDR SWIA201332839](https://openairdocs.org/sdr/SWIA201332839), Feb 17, 2013: Cndair CL6002B19. SERVO. FAILED. UNCOMMANDED AP DISCONNECT IN TURNS AND DESCENT. ONCE AP KICKED OFF, THE YOKE WOULD JERK IN THE OPPOSITE DIRECTION OF THE (N652BR)
- [SDR SWIA201332618](https://openairdocs.org/sdr/SWIA201332618), Jan 21, 2013: Emb EMB120ER. SERVO. FAILED. WITH AUTOPILOT SELECTED TO THE CAPTAINS SIDE AND AUTOPILOT ENGAGED, AIRCRAFT STARTED A SHALLOW CLIMB AND THEN AN ABRUPT  (N221SW)
- [SDR CA121218011](https://openairdocs.org/sdr/CA121218011), Nov 29, 2012: Piper PA31350. CABLE. DAMAGED. (CAN) DURING PRE-PURCHASE, ANNUAL INSPECTION, AILERON AUTO PILOT ROLL SERVO BRIDAL CABLE FOUND UNSERVICEABLE. NEW MRP CA
- [SDR USAA2012092100001](https://openairdocs.org/sdr/USAA2012092100001), Sep 18, 2012: Boeing 7572G7. SOLENOID. FAILED. PHX FLT 125 EN ROUTE HNL TO PHX. WHEN AUTOPILOT WAS DISCONNECTED AT 6000FT ON APPROACH THE ROLL YOKE CONTROL WAS VERY HE (N910AW)
- [SDR UALA2012072704082](https://openairdocs.org/sdr/UALA2012072704082), Jul 25, 2012: Boeing 767322. SERVO VALVE. FAULTY. RIGHT FCC FAULTING RIGHT ELEVATOR SERVO. REPLACED RT ELEVATOR SERVO VALVE PER AMM. PERFORMED AFDS TEST PER MM. TEST PASS (N674UA)
- [SDR YENA20120607529](https://openairdocs.org/sdr/YENA20120607529), Jun 7, 2012: Emb ERJ190100IGW. SERVO. MALFUNCTIONED. FLT 1229 BOS-RDU, AT FLIGHT 280 A/P BEGAN UNCOMMANDED ROLL TO RIGHT DISCONNECTED AUTOPILOT. MANUALLY FLEW AIRCRAFT TO TO (N337JB)
- [SDR R61A201204300258](https://openairdocs.org/sdr/R61A201204300258), Apr 30, 2012: Emb ERJ170200LR. SERVO. FAULTY. CREW REPORTED VIBRATION IN FLIGHT DURING CRUISE. CREW DECLARED AN EMERGENCY AND DIVERTED TO CMH. AIRCRAFT LANDED WITHOUT (N119HQ)
- [SDR SIMA20120430001](https://openairdocs.org/sdr/SIMA20120430001), Apr 30, 2012: Cndair CL6002C10. SERVO. FAULTY. ON FLIGHT 9800 THE CREW REPORTED THAT UPON APPROACH DISCONNECT PITCH CONTROLS JAMMED. ABLE TO OVERPOWER AND REGAIN DEGRA (N501BG)
- [SDR CA120426009](https://openairdocs.org/sdr/CA120426009), Apr 24, 2012: Pilats PC1245. MOTOR. DISCONNECTED. (CAN) DURING CLIMB, CREW EXPERIENCED AN UNCOMMANDED PITCH UP, AUTO PILOT DISCONNECTED AND FLIGHT CONTINUED. SUBSEQUENT M
- [SDR CA120424002](https://openairdocs.org/sdr/CA120424002), Apr 18, 2012: Bombdr CL6002D15. SERVO. FAILED. (CAN) WHILE IN CRUISE WITH AUTOPILOT IN NAV MODE, A/P INITIATED A LT TURN AND ACFT BANKED TO THE LT FURTHER THAN REQUEST
- [SDR SWIA201230368](https://openairdocs.org/sdr/SWIA201230368), Apr 11, 2012: Cndair CL6002B19. SERVO. FAILED. IMMEDIATELY AFTER AUTO PILOT DISCONNECT, THE ELEVATOR CONTROL STUCK, AS IF THE AUTO PILOT WAS STILL ENGAGED. IT THEN REL (N492SW)
- [SDR AALA20120307001](https://openairdocs.org/sdr/AALA20120307001), Mar 6, 2012: Doug DC982. SERVO. INOPERATIVE. DEN - INFLIGT DFW-SLC. CREW REPORTED BOTH AUTO-PILOTS FAILED DURING FLIGHT. FLIGHT DIVERTED DEN LANDED WITHOUT INCIDENT. (N7509)
- [SDR CA120314003](https://openairdocs.org/sdr/CA120314003), Feb 29, 2012: Cndair CL600*. AILERON SYS. BINDING. (CAN) DURING APPROACH THE FLIGHT CREW RECEIVED A AP RIGHT WING DOWNÏ¿½ CAUTION MESSAGE AND THE A/C CONTINUED IN THE LH T
- [SDR CA120215009](https://openairdocs.org/sdr/CA120215009), Feb 15, 2012: Pilats PC1247E. SERVO. DEFECTIVE. (CAN) CREW REPORTS THAT THE YAW DAMPER FAILS AFTER IT STARTS TO CORRECT TRIM. SUBSIQUENTLY THE. AUTOPILOT FAILS.
- [SDR UALA2012020300662](https://openairdocs.org/sdr/UALA2012020300662), Feb 2, 2012: Boeing 767322. SERVO VALVE. FAULTY. AIRFRAME VIBRATION. WITH CTR A-P ENGAGED VIBRATION FELT IN BOTH YOKES, NOT FELT IF USING LEFT OR RT AUTOPILOTS. CARRIED  (N653UA)
- [SDR SWIA201229352](https://openairdocs.org/sdr/SWIA201229352), Jan 21, 2012: Cndair CL6002C10. SERVO. MALFUNCTIONED. THE AILERONS SEEMED TO JAM. (FLT 4497) REPLACED AILERON SERVO. (N616QX)

All 267: https://openairdocs.org/jasc/2215/reports.md

## Other codes in chapter 22

- [JASC 2200](https://openairdocs.org/jasc/2200): Auto Flight System (567 reports)
- [JASC 2210](https://openairdocs.org/jasc/2210): Autopilot System (4,014 reports)
- [JASC 2211](https://openairdocs.org/jasc/2211): Autopilot Computer (586 reports)
- [JASC 2212](https://openairdocs.org/jasc/2212): Altitude Controller (29 reports)
- [JASC 2213](https://openairdocs.org/jasc/2213): Flight Controller (148 reports)
- [JASC 2214](https://openairdocs.org/jasc/2214): Autopilot Trim Indicator (9 reports)
- [JASC 2216](https://openairdocs.org/jasc/2216): Autopilot Trim Servo (128 reports)
- [JASC 2220](https://openairdocs.org/jasc/2220): Speed-Attitude Correction System (118 reports)
- [JASC 2230](https://openairdocs.org/jasc/2230): Auto Throttle System (1,084 reports)
- [JASC 2250](https://openairdocs.org/jasc/2250): Aerodynamic Load Alleviating (15 reports)
- [JASC 2297](https://openairdocs.org/jasc/2297): Auto Flight System Wiring (149 reports)

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