# N835SY: 2011 Boeing 737-8KN

- Status: Valid registration
- Airframe: [Boeing 737-8KN](https://openairdocs.org/model/boeing-737-8kn) (registry code 1384612, 191 seats)
- Engine: [CFM International CFM56-7B series](https://openairdocs.org/engine/cfm-international-cfm56-7b-series) (registry code 13803)
- Serial number: 40250
- Year built: 2011
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: December 18, 2019
- Certificate issued: December 18, 2019
- Expires: December 31, 2029
- Mode S code: AB6C94
- Registered owner: [Sun Country Inc](https://openairdocs.org/faa-owner/SUN%20COUNTRY%20INC)
- Location: [Minneapolis, MN](https://openairdocs.org/faa-place/MN/Minneapolis)
- Owner type: Corporation
- Owner's area on the map: 44.8723° N, 93.2328° W: Placed by OpenAirDocs at the center of ZIP code 55450, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=835SY
- Page: https://openairdocs.org/aircraft/N835SY

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every CFM International CFM56-7B model are included.

## ADs that may apply (OpenAirDocs): 19 in force

### Matched by airframe (Boeing 737-8KN)

None in force.

### Matched by engine (CFM International CFM56-7B series)

- [AD 2023-05-05](https://openairdocs.org/ad/2023-05-05): Turbine Engine Compressor Section · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/3 and 98 more. Effective May 10, 2023
- [AD 2022-02-03](https://openairdocs.org/ad/2022-02-03): Turbine Engine Accessory Drive · CFM International CFM56-3, CFM56-3B, CFM56-3C and 34 more. Effective Mar 22, 2022
- [AD 2021-16-08](https://openairdocs.org/ad/2021-16-08): Turbine Section · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/P and 55 more. Effective Sep 28, 2021
- [AD 2018-26-01](https://openairdocs.org/ad/2018-26-01): Turbine Engine Compressor Section · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Jan 10, 2019
- [AD 2018-09-51](https://openairdocs.org/ad/2018-09-51): Engine · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Jun 7, 2018
- [AD 2015-18-04](https://openairdocs.org/ad/2015-18-04): 73-tooth gearshaft located in the engine accessory gearbox (AGB) · CFM International CFM56-3, CFM56-7B20, CFM56-7B20/2 and 47 more. Effective Oct 20, 2015
- [AD 2015-04-02](https://openairdocs.org/ad/2015-04-02): Dual engine thrust instability event · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Mar 31, 2015
- [AD 2010-13-09](https://openairdocs.org/ad/2010-13-09): Stage 3 low-pressure turbine (LPT) · CFM International CFM56-5, CFM56-5-A1/F, CFM56-5A4 and 88 more. Effective Jul 26, 2010
- [AD 2010-01-05](https://openairdocs.org/ad/2010-01-05): LP turbine rear frames · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 25 more. Effective Feb 18, 2010
- [AD 2009-11-02](https://openairdocs.org/ad/2009-11-02): HPC 4-9 spools · CFM International CFM56-2, CFM56-2A, CFM56-2B and 109 more. Effective Jun 23, 2009
- [AD 2008-03-09](https://openairdocs.org/ad/2008-03-09): Low pressure turbine rear frames (TRFs) · CFM International CFM56-7B18, CFM56-7B20, CFM56-7B22 and 10 more. Effective Mar 10, 2008
- [AD 2006-26-01](https://openairdocs.org/ad/2006-26-01): Fuel filters · CFM International CFM56-2, CFM56-2A, CFM56-2B and 93 more. Effective Jan 3, 2007
- [AD 2002-16-18](https://openairdocs.org/ad/2002-16-18): Low pressure turbine (LPT) nozzle segments · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/P and 33 more. Effective Sep 18, 2002
- [AD 2002-13-03](https://openairdocs.org/ad/2002-13-03): Turbofan Engines · CFM International CFM56-2, CFM56-2A, CFM56-2B and 55 more. Effective Aug 1, 2002
- [AD 2001-11-05](https://openairdocs.org/ad/2001-11-05): No. 4 Bearings · CFM International CFM56-2, CFM56-2B, CFM56-3 and 45 more. Effective Jun 11, 2001
- [AD 2001-02-12](https://openairdocs.org/ad/2001-02-12): On-Wing Torque Inspection · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B22 and 11 more. Effective Feb 14, 2001
- [AD 98-21-23](https://openairdocs.org/ad/98-21-23): Electronic Engine Control · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B22 and 10 more. Effective Nov 2, 1998
- [AD 98-19-20](https://openairdocs.org/ad/98-19-20): Hydromechanical Unit · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B22 and 7 more. Effective Oct 7, 1998
- [AD 98-14-51](https://openairdocs.org/ad/98-14-51): Accessory Gearbox · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B22 and 10 more. Effective Oct 1, 1998

### Historical (superseded or no longer in force)

- [AD 2021-10-09](https://openairdocs.org/ad/2021-10-09) (historical): Turbine Engine Compressor Section · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/3 and 82 more. Effective Jun 24, 2021
- [AD 2019-12-05](https://openairdocs.org/ad/2019-12-05) (historical): Turbine Section · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/P and 39 more. Effective Jul 5, 2019
- [AD 2018-18-01](https://openairdocs.org/ad/2018-18-01) (historical): Turbine Engine Compressor Section · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Oct 16, 2018
- [AD 2018-10-11](https://openairdocs.org/ad/2018-10-11) (historical): Turbine Engine Compressor Section · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Jun 1, 2018
- [AD 2018-09-10](https://openairdocs.org/ad/2018-09-10) (historical): Turbine Engine Compressor Section · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective May 14, 2018
- [AD 2013-26-01](https://openairdocs.org/ad/2013-26-01) (historical): Oil dynamic seal assembly · CFM International CFM56-3, CFM56-3B, CFM56-3C and 52 more. Effective Feb 3, 2014
- [AD 2000-12-01](https://openairdocs.org/ad/2000-12-01) (historical): Critical Life-Limited Parts · CFM International CFM56-2, CFM56-2A, CFM56-2B and 54 more. Effective Dec 11, 2000

## Information bulletins (advisory) (1 in force)

- [SAIB NE-08-17R3](https://openairdocs.org/saib/NE-08-17R3): Turbine Section - Propulsion Technology LLC Unapproved Repair. Issued May 28, 2014
- [SAIB NE-08-17R2](https://openairdocs.org/saib/NE-08-17R2) (historical): Turbine Section - Propulsion Technology LLC Unapproved Repair. Issued Mar 7, 2011
- [SAIB NE-08-17R1](https://openairdocs.org/saib/NE-08-17R1) (historical): Propulsion Technology LLC Unapproved Repair. Issued May 22, 2008
- [SAIB NE-08-17](https://openairdocs.org/saib/NE-08-17) (historical): Propulsion Technologies International Unapproved Repair. Issued May 14, 2008

## NTSB investigations

None matched to N835SY.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Incident 20250530008769I](https://openairdocs.org/incident/20250530008769I), May 30, 2025: Boeing 737-8KN (N835SY), Myrtle Beach, SC, Minor damage. Performed an incident investigation of a commercial flight, which after block-in at myr on 5/30/25, was “windmilled” by a lateral wind gust which rotated the…

## Service difficulty reports (28)

As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR SCNA20260716306](https://openairdocs.org/sdr/SCNA20260716306), Jul 14, 2026: COVER. MISSING. ROW 15 DEF OVER HEAD EMERGENCY LIGHT MISSING COVER. REPLACED 15 DEF EMER EXIT LIGHT ASSEMBLY COVER. IAW AMM 33-51-01. OK FOR SERVICE.
- [SDR SCNA20260713292](https://openairdocs.org/sdr/SCNA20260713292), Jul 11, 2026: LATCH. STUCK. FORWARD FA EMERGENCY EQUIPMENT CABINET DOOR LATCH STUCK. PERFORMED OPS CHECK OF EMERGENCY EQUIP CABINET DOOR LATCH IAW AMM 25-24-70 OK FOR SERVICE.
- [SDR SCNA20260424166](https://openairdocs.org/sdr/SCNA20260424166), Apr 24, 2026: HYDRAULIC SYSTEM. OVERSERVICED. DURING FLIGHT FA ADVISED BURNING ODOR IN CABIN AND FLICKERING LIGHTS OVERHEAD. NO SMOKE. REF FIM 21-00 TASK 806. COULD NOT DUPLICATE SMELL. FOUND HYD B SYSTEM A
- [SDR SCNA20260407150](https://openairdocs.org/sdr/SCNA20260407150), Apr 6, 2026: TEMP STRIP. FAILED. FWD LAV TEMERATURE STRIP WAS DARK ON 200 F CIRCLE . INSPECTED FWD LAV NO EVIDENCE OF FIRE, R & R TEMPETURE STRIP IAW AMM 26-24-01 .
- [SDR SCNA20260216083](https://openairdocs.org/sdr/SCNA20260216083), Feb 14, 2026: POTABLE WATER. ODOR. FWD GALLEY COFFEE MAKER HAS STRONG CHEMICAL ODOR, POTABLE WATER SYSTEM. DISINFECTED POTABLE WATER SYSTEM OZON REF TASK CARD 0538000002 W/O 102224 THIS CLEARS ME
- [SDR SCNA20260216082](https://openairdocs.org/sdr/SCNA20260216082), Feb 14, 2026: POTABLE WATER. ODOR. FA'S AND PASSENGERS NOTICE STRONG CHEMICAL SMELL COMING FRIM COFFEE/MAKER. POTABLE WATER SERVICED REF AMM 12-14-01 OK FOR SERVICE
- [SDR SCNA20260209064](https://openairdocs.org/sdr/SCNA20260209064), Jan 10, 2026: INTERCOSTAL. CORRODED. CORROSION ON INTERCOSTAL BTW BS 294.5 - 312, LBL 11. THE INTERCOSTAL WAS REPLACED IAW SRM 51-40-02-0G-0.
- [SDR SCNA20260127045](https://openairdocs.org/sdr/SCNA20260127045), Jan 10, 2026: FLOORBEAM. CORRODED. CORROSION ON THE FLOORBEAM UPPER TEE BS 328, BTW RBL 9 - 41. OPEN
- [SDR SCNA20260113025](https://openairdocs.org/sdr/SCNA20260113025), Jan 10, 2026: LIGHT. DAMAGED. SELF ILLUMINATING FLOOR PATH MARKING SYSTEM VISUAL CHECK. 12 EACH, PROXIMITY PHOTOLUMINESCENT WERE FOUND DAMAGE (SCRATCHED AND BROKEN) (WORK IN PROGRESS).
- [SDR SCNA20260129020](https://openairdocs.org/sdr/SCNA20260129020), Jan 10, 2026: FITTING. CORRODED. CORROSION ON AFT GIRT BAR ATTACHMENT FITTING (FLOOR STRUCTURE) STA 344.0 LBL 60 APPROX AT PASSENGER COMPARTMENT. GIRT BAR ATTACHMENT FITTING (FLOOR STRUCTURE) S
- [SDR SCNA202601300047](https://openairdocs.org/sdr/SCNA202601300047), Jan 7, 2026: PLATE. CORRODED. CORROSION ON SIDEPLATE RH FROM STA 727 TO STA 947.5 RBL 21 AT AFT CARGO COMPARTMENT. AFT CARGO COMPARTMENT WAS REMOVED PER SRM 51-10-02-0G-0 AND EVALUATED WITHI
- [SDR SCNA20260127046](https://openairdocs.org/sdr/SCNA20260127046), Jan 7, 2026: PLATE. CORRODED. CORRODED SIDEPLATE, BS 400 - 500I, S26R IN THE FWD CARGO COMPARTMENT. REMOVED IAW SRM 51-10-02-0G-0 AND WAS MEASURED AND FOUND WITHIN OF LIMITS IAW SRM 53--00-5
- [SDR SCNA20260127044](https://openairdocs.org/sdr/SCNA20260127044), Jan 7, 2026: FLOOR SUPPORT. CRACKED. CRACKED FLOOR SUPPORT BTW BS 312 - 328, RBL 29. THE FLOOR SUPPORT WAS REPLACED IAW SRM 51-40-02-0G-0.
- [SDR SCNA20251125449S](https://openairdocs.org/sdr/SCNA20251125449S), Nov 22, 2025: COVER. BROKEN. EMERGENCY LIGHT BY AFT LEFT LAV, ATTACHED TO THE F/A SEAT ATTACHMEENT PANEL IS BROKEN. REATTACHED LIGHT COVER IAW AMM 25-00-00. OPS CHECK GOOD.
- [SDR SCNA20251125449](https://openairdocs.org/sdr/SCNA20251125449), Nov 22, 2025: TRASH BIN. DAMAGED. AFT LEFT LAVATORY HAS A SHARP EDGE ON WASTE BASKET OPENING. INSPECTED WASTE BASKET, NO DEFECTS NOTED, REF AMM 25-40-08.
- [SDR SCNA20251121448](https://openairdocs.org/sdr/SCNA20251121448), Nov 20, 2025: BRACKET. LOOSE. FWD R1 DOOR GIRT BAR BRACKET LOOSE. TIGHTENED 1R DOOR GIRT BAR HOLDER IAW AMM 25-66-01.
- [SDR SCNA20250811314](https://openairdocs.org/sdr/SCNA20250811314), Aug 9, 2025: NONE. NO DISCREPANCY. EMERGENCY RETURN OVERWEIGHT LANDING. APPROX 153K LBS. REPORTS ROUTINE LANDING, PERFORMED A/C OVERWEIGHT LANDING WALK-AROUND INSPECTION OF MLG'S, NLG, WHEEL AND 
- [SDR SCNA20250731294](https://openairdocs.org/sdr/SCNA20250731294), Jul 31, 2025: UNKNOWN. UNKNOWN. EXCESSIVE PRESSURE AND NOISE FROM VENTS ON CLIMB OUT AT 10000 DIFFERENTIAL PRESSURE 2 PSI WITH CABIN CLIMB AT ZERO DUCT PRESSURE WAS 40 PSI BUT SAW IT FLUCTUATE
- [SDR SCNA20250725272](https://openairdocs.org/sdr/SCNA20250725272), Jul 25, 2025: LIGHT. LOOSE. ROW 9-12 LEFT SIDE EMERGENCY PATH LIGHTING HAS BECOME LOOSE AND NEEDS TO BE REATTACHED. RESECURED EMERGENCY PATH STRIP IAW AMM 25-27-31. OK FOR SERVICE.
- [SDR SCNA20250709251](https://openairdocs.org/sdr/SCNA20250709251), Jul 8, 2025: GLOWSTRIP. DAMAGED. DAMAGED PHOTOLUMINESCENT FLOOR PATH MARKING BETWEEN ROWS 9-11. REMOVED AND REPLACED DAMAGED PHOTOLUMINESCENT FLOOR PATH STRIP. NO OTHER DEFECTS NOTED. REF CMM 3
- [SDR SCNA20250725273](https://openairdocs.org/sdr/SCNA20250725273), Jun 24, 2025: SKIN. DAMAGED. WO 95798, NR ENG53SCA-11680: N835SY: FUSELAGE SKIN, STA 420 TO 460 BETWEEN S-21R AND S-26R - REPAIR - RESOLUTION: C/W BY FAS 4686
- [SDR SCNA20250725274](https://openairdocs.org/sdr/SCNA20250725274), Jun 23, 2025: SKIN. DAMAGED. WO 95798, NR 00001: REF EA 53-0249 ACCOMPLISH A PERMANENT REPAIR OF THE FUSELAGE SKIN BETWEEN STRA 370 – 380 AT S-24R PER SRM 53-00-01-2R-3 WITHIN 5 FLIGHT HOUR
- [SDR SCNA20250722270](https://openairdocs.org/sdr/SCNA20250722270), Jun 22, 2025: SKIN. DAMAGED. FUSELAGE SKIN, STA 420 TO 480 BETWEEN S-26R AND S-27L - REPAIR - C/W BY FAS 4686
- [SDR SCNA20250722269](https://openairdocs.org/sdr/SCNA20250722269), Jun 22, 2025: SKIN. DAMAGED. WO95798, ENG-53SCA-11679, N835SY: FUSELAGE SKIN, STA 370 TO 385 BETWEEN S-22R AND S-25R - REPAIR - RESOLUTION: C/W BY FAS 4686
- [SDR SCNA20250425130](https://openairdocs.org/sdr/SCNA20250425130), Apr 20, 2025: SIGN. INOPERATIVE. OVERWING ESCAPE HATCH EXIT SIGN ABOVE AISLE EMERGENCY LIGHT INOP - RESOLUTION: (IN PROGRESS)
- [SDR SCNA20250314074](https://openairdocs.org/sdr/SCNA20250314074), Mar 13, 2025: LENS. MISSING. DEFECT 797645: EMERGENCY EXIT ROW LIGHT LENS MISSING ROW 15ABC ( INTERIOR EMERGENCY EXIT LIGHTING SYSTEM; EMERGENCY AISLE LIGHTS ). - - RESOLUTION: (IN PROGRESS
- [SDR SCNA20230328114](https://openairdocs.org/sdr/SCNA20230328114), Mar 24, 2023: UNKNOWN. UNKNOWN. DEFECT 684679: DURING APPROACH TO LANDING THE AMBER L/E FLAP TRANSIT LIGHT ILLUMINATED AND STAY ILLUMINATED PERFORMED QRH AND LANDED FLAPS 15 NORMALLY. RESOLUTI
- [SDR SCNA20230125045](https://openairdocs.org/sdr/SCNA20230125045), Jan 21, 2023: LAMP. INOPERATIVE. L2 EXTERIOR EMERGENCY LIGHT INOP RELAMPED EXTERIOR L2 EMERGENCY LIGHT. OPS CHECKED GOOD. REF AMM 33-51-00.

## STCs that may be installed (OpenAirDocs) (2)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the engine (CFM International CFM56-7B series)

- [STC SE04840NY](https://openairdocs.org/stc/SE04840NY): Installation of HarcoSemco Exhaust Gas Temperature (EGT) Electrical Harnesses in CFM56-7 engine. Kilroy Aviation LLC. Lists CFM56-7B20
- [STC SE03036CH](https://openairdocs.org/stc/SE03036CH): Application of a deep compressive stress layer using a Low Plasticity Burnishing (LPB) process on CFM56-7 Series Engines Stage 1 High Pressure Compressor (HPC) Blade Dovetails in accordance with Delta Air Lines Inc. Drawing No. 72-0396, Revision B, dated November 3, 2011, or later FAA Approved revision. Delta Air Lines Inc. Lists CFM56-7B20

## Related

- Other Boeing 737-8KN aircraft: https://openairdocs.org/model/boeing-737-8kn/aircraft.md
- The CFM International CFM56-7B series engine: https://openairdocs.org/engine/cfm-international-cfm56-7b-series.md

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