# Service difficulty reports: Keystone Helicopter S-76C

A list on [Keystone Helicopter S-76C](https://openairdocs.org/model/keystone-helicopter-s-76c.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 15 · 717 reports

- [SDR 2026FA0000301](https://openairdocs.org/sdr/2026FA0000301.md): Indication Sys · false indication · Apr 24, 2026 · N781RL · Skrsky S76C · Fuel Quantity Indicator
  > RDAU DISPLAYS FAULTY FUEL INDICATIONS. AFTER START-UP #1 FUEL QUANTITY DROPS APPROX. 100 LBS. THEN RISES THE SAME AFTER SHUTDOWN.
- [SDR HEEA202601020001](https://openairdocs.org/sdr/HEEA202601020001.md): Brace · inoperative · Jan 1, 2026 · N745P · Skrsky S76C · Main Landing Gear
  > ON CLIMB OUT FROM KGLS, RIGHT SIDE LANDING GEAR WOULD NOT RETRACT.
- [SDR HEEA202509050001](https://openairdocs.org/sdr/HEEA202509050001.md): Transducer · inoperative · Sep 3, 2025 · N725P · Skrsky S76C · Engine Bleed Air System
  > NUMBER ONE ENGINE BARRIER FILTER MAINTENANCE CAUTION CAME ON IN FLIGHT RETURNED TO HOUMA. ALL OTHER ENGINE INDICATIONS NORMAL.
- [SDR HEEA202507240001](https://openairdocs.org/sdr/HEEA202507240001.md): Valve · leaking · Jul 21, 2025 · N738P · Skrsky S76C · Turbine Engine Oil System
  > DURING CRUISE FLIGHT, SLOW STEADY DECREASE OF NUMBER 1 ENGINE OIL PSI WAS NOTED.
- [SDR VE7A202505190127](https://openairdocs.org/sdr/VE7A202505190127.md): Fire Detector · failed · May 14, 2025 · N797P · Skrsky S76C · Fire Detection
  > #2 ENGINE FIRE CAUTION LIGHT ILLUMINATED AND ALARM SOUND WAS PRESENT DURING FLIGHT.
- [SDR 2025F00046](https://openairdocs.org/sdr/2025F00046.md): Computer · failed · Feb 19, 2025 · N784RL · Skrsky S76C · Flight Management Computing Hardware System
  > PILOTS IIDS SCREEN FAILS AT STARTUP. CENTER IIDS SCREEN FAILS INTERMITTENTLY DURING FLIGHT.
- [SDR HEEA202412180001](https://openairdocs.org/sdr/HEEA202412180001.md): Starter Gen · inoperative · Dec 17, 2024 · N794P · Skrsky S76C · DC Generator-Alternator
  > #2 GENERATOR FAILED DURING OUR HIGH ORBIT OF MC773. CONTINUED ORBITING AND FOLLOWED THE EMERGENCY PROCEDURE CHECKLIST. UNABLE TO RESET. LANDED AT MC773 WITHOUT INCIDENT.
- [SDR YTRA2024111500288](https://openairdocs.org/sdr/YTRA2024111500288.md): Fitting · cracked · Nov 15, 2024 · N787RL · Skrsky S76C · Main Landing Gear
  > LEFT MAIN LANDING GEAR COLLAPSED ONCE AIRCRAFT SETTLED. GEAR WAS DOWN AND LOCKED. FOUND AIRFRAME FITTING CRACKED.
- [SDR YTRA20241127001](https://openairdocs.org/sdr/YTRA20241127001.md): Fitting · cracked · Nov 13, 2024 · N787RL · Skrsky S76C · Fuselage, Landing Gear Attach Fittings
  > LEFT MAIN LANDING GEAR COLLAPSED WHEN AIRCRAFT SETTLED. GEAR WAS DOWN AND LOCKED. FOUND AIRFRAME FITTING CRACKED.
- [SDR VE7A2024091700001](https://openairdocs.org/sdr/VE7A2024091700001.md): Pump · failed · Sep 14, 2024 · N919CM · Skrsky S76C · Air Distribution System
  > ON CLIMB OUT WHEN AC WAS TURNED ON ODOR FILLED THE COCKPIT AREA. FLIGHT CANCELED AND RETURNED TO BASE. AIR PUMP MFG BY IMPACT INSTRUMENTATION FAILED AND CAUSED ODOR TO FILL THE COCK PIT AREA PUMP PN E-428K SN 0609003 WAS THE PROBLEM, AND IT FAILED.
- [SDR YTRA2024091626001](https://openairdocs.org/sdr/YTRA2024091626001.md): Fire Detector · intermittent · Sep 13, 2024 · N785RL · Skrsky S76C · Fire Detection
  > #2 ENGINE FIRE LIGHT ILLUMINATED INTERMITTENTLY IN LANDING PHASE OF FLIGHT. REMOVED AND REPLACED #2 REAR FLAME DETECTOR.
- [SDR HEEA202409160001](https://openairdocs.org/sdr/HEEA202409160001.md): Transducer · inoperative · Sep 13, 2024 · N725P · Skrsky S76C · Fuel Controlling System
  > DURING 3Q CLIMB OUT, FLUCTUATIONS IN TORQUE AND N1 OBSERVED WITH YAW TO THE LEFT. THIS WAS FOLLOWED BY DECU MINOR FAULT. PROCEEDED TO RTB.
- [SDR HEEA202407290001](https://openairdocs.org/sdr/HEEA202407290001.md): Transmitter · inoperative · Jul 26, 2024 · N725P · Skrsky S76C · Main Rotor Gearbox
  > DURING CRUISE FLIGHT THE MGB PRESSURE INDICATION BEGAN TO FLUCTUATE BETWEEN 65PSI TO 0 PSI. AIRCRAFT RETURNED TO BASE.
- [SDR HEEA202407240001](https://openairdocs.org/sdr/HEEA202407240001.md): Motor · inoperative · Jul 23, 2024 · N714P · Skrsky S76C · Humidity Control System
  > 15 MINUTES FROM HOUMA, SMOKE WAS OBSERVED COMING OUT OF A/C VENTS. AIR CONDITIONER AND FAN WERE TURNED OFF AND SMOKE IMMEDIATELY STOPPED.
- [SDR HEEA202405230001](https://openairdocs.org/sdr/HEEA202405230001.md): Hydraulic System · fluctuates · May 21, 2024 · N724PH · Skrsky S76C · Hydraulic System, Main
  > #1 HYDRAULIC FLUCTUATION, RTB
- [SDR HEEA202405210001](https://openairdocs.org/sdr/HEEA202405210001.md): Unknown · smoke · May 14, 2024 · N745P · Skrsky S76C · Air Distribution System
  > DURING CRUISE FLIGHT, EXPERIENCED SMOKE IN COCKPIT FOLLOWED BY ELECTRICAL BURNING SMELL. OPENED DOOR WINDOWS AND TURNED OFF AC AND BLOWER. MC365 WAS WITHIN A MILE AND SET UP FOR EMERGENCY LANDING. NOTIFIED COMM CENTER. VISUALLY INSPECTED AIRCRAFT NOSE, COCKPIT
- [SDR HEEA202402280001](https://openairdocs.org/sdr/HEEA202402280001.md): Computer · failed · Feb 26, 2024 · N738P · Skrsky S76C · Autopilot Computer
  > DURING APPROACH OFFSHORE, #2 AP FAILED.
- [SDR VE7A202402069052](https://openairdocs.org/sdr/VE7A202402069052.md): Fire Detector · false indication · Feb 2, 2024 · N919CM · Skrsky S76C · Fire Detection
  > : DURING CRUISE FLIGHT #1 ENG FIRE LIGHT, ALONG WITH AUDIO FLASHED ON FOR ABOUT ONE SECOND. NO SECONDARY INDICATIONS OF FIRE OBSERVED. ELECTED TO ABORT FLIGHT. SAME INDICATION OCCURRED THREE MORE TIMES PRIOR TO LANDING. INSPECTED #1 FLAME DECTECTOR FOUND FAUL
- [SDR HEEA202401310001](https://openairdocs.org/sdr/HEEA202401310001.md): Transmission · making metal · Jan 30, 2024 · N794P · Skrsky S76C · Main Rotor Gearbox
  > MAIN GEAR BOX CHIP LIGHT CAME ON. ALL OTHER INDICATIONS WERE NORMAL, RESET CIRCUIT BREAKER, AND LIGHT REMAINED ON. AIRCRAFT RETURNED TO HOUMA.
- [SDR HEEA202401110001](https://openairdocs.org/sdr/HEEA202401110001.md): Pressure Switch · inoperative · Jan 11, 2024 · N794P · Skrsky S76C · Hydraulic Indicating System
  > # SERVO SYSTEM LIGHT ILLUMINATED IN CRUISE FLIGHT. FOLLOWED EMERGENCY PROCEDURE CHECK LIST. HYDRAULIC PRESSURE REMAINED IN GREEN. NO BINDING IN CONTROL. SLOWED TO 125 KNOTS. LOWERED LANDING GEAR. NO FUTHER ISSUE.
- [SDR U0GA202311150001](https://openairdocs.org/sdr/U0GA202311150001.md): Control Rod · damaged · Nov 13, 2023 · N760BG · Skrsky S76C · Main Rotor Control
  > BRISTOW RECENTLY DISCOVERED A LOOSE JAM NUT ON AFT M/R SERVO INPUT ROD END DURING A SCHEDULED INSPECTION. THE JAM NUT IS THE SUBJECT OF FAA AD 2015-19-51, AD 2017-19-01 AND SIK AWL 300 HOUR INSPECTION ITEM 30A. THE INTENT OF THESE INSPECTIONS IS ‘. TO DETECT
- [SDR HEEA202310310001](https://openairdocs.org/sdr/HEEA202310310001.md): Gauge · failed · Oct 31, 2023 · N718P · Skrsky S76C · Fuel Quantity Indicator
  > DURING CRUISE FLIGHT THE FUEL QUANTITY GAUGE FAILED EN-ROUTE TO MC773. THE CREW ELECTED TO DIVERT TO THEIR OFFSHORE ALTERNATE TO BE EVALUATED BY MECHANIC.
- [SDR HEEA202310230001](https://openairdocs.org/sdr/HEEA202310230001.md): Retaining Ring · dislodged · Oct 23, 2023 · N725P · Skrsky S76C · Tail Rotor Control System
  > DURING CRUISE FLIGHT, WASHERS AND RETENTION RING WERE SEEN ON THE COPILOT FLOOR. DISCOVERED THE RIGHT TAIL ROTOR PEDAL WAS SLIPPING OFF. RETURNED TO BASE WITH NO FURTHER INCIDENT.
- [SDR HEEA202310170002](https://openairdocs.org/sdr/HEEA202310170002.md): Landing Gear · inoperative · Oct 17, 2023 · N738P · Skrsky S76C · Nose/Tail Landing Gear
  > RTB DUE TO NOSE LANDING GEAR DID NOT RETRACT.
- [SDR U0GA ASR11041](https://openairdocs.org/sdr/U0GA%20ASR11041.md): Unknown · unknown · Aug 27, 2023 · N760BG · Skrsky S76C · Fire Protection System
  > HOLDING SOUTH OF 92LA AT 500' AGL FOR COMPANY TO CLEAR HOSPITAL HELIPAD, #2 ENGINE FIRE WARNING TONE SOUNDED, #2 ENGINE FIRE LIGHT ILLUMINATED, MASTER CAUTION LIGHT ILLUMINATED, AND #2 FIRE T-HANDLE LIGHT ILLUMINATED. AFTER ASSESSING THE SITUATION, CREW DECID
- [SDR 2023FA0000392](https://openairdocs.org/sdr/2023FA0000392.md): Transducer · abnormal · Jul 26, 2023 · N991MK · Skrsky S76C · Engine Controls
  > MOMENTARY ENGINE ROLL BACK WITH TORQUE SPLIT AND YAWING MOTION
- [SDR 2023FA0000387](https://openairdocs.org/sdr/2023FA0000387.md): Transducer · abnormal · Jul 26, 2023 · N431MK · Skrsky S76C · Engine Controls
  > MOMENTARY PARTIAL POWER LOSS WITH YAW KICK AND LOSS OF TORQUE
- [SDR 2023FA0000391](https://openairdocs.org/sdr/2023FA0000391.md): Transducer · abnormal · Jul 14, 2023 · N991MK · Skrsky S76C · Engine Controls
  > MOMENTARY ENGINE ROLL BACK WITH TORQUE SPLIT AND YAWING MOTION
- [SDR 2023FA0000386](https://openairdocs.org/sdr/2023FA0000386.md): Transducer · abnormal · Jun 13, 2023 · N431MK · Skrsky S76C · Engine Controls
  > MOMENTARY PARTIAL POWER LOSS WITH YAW KICK AND LOSS OF TORQUE
- [SDR 2023FA0000390](https://openairdocs.org/sdr/2023FA0000390.md): Transducer · abnormal · Jun 5, 2023 · N991MK · Skrsky S76C · Engine Controls
  > MOMENTARY ENGINE ROLL BACK WITH TORQUE SPLIT AND YAWING MOTION
- [SDR 2023FA0000389](https://openairdocs.org/sdr/2023FA0000389.md): Transducer · abnormal · May 2, 2023 · N991MK · Skrsky S76C · Engine Controls
  > MOMENTARY ENGINE ROLL BACK WITH TORQUE SPLIT AND YAWING MOTION.
- [SDR 2023FA0000385](https://openairdocs.org/sdr/2023FA0000385.md): Transducer · abnormal · Apr 20, 2023 · N431MK · Skrsky S76C · Engine Controls
  > MOMENTARY PARTIAL POWER LOSS WITH YAW KICK AND LOSS OF TORQUE
- [SDR 2023FA0000213](https://openairdocs.org/sdr/2023FA0000213.md): Transducer · defective · Apr 13, 2023 · N991MK · Skrsky S76C · Engine Fuel and Control
  > PILOT REPORT: WHEN DEPARTING PN44 IN 431MK WITH TWO PAX ONBOARD, WE EXPERIENCED A MOMENTARY LOSS OF POWER WITH ENGINE OSCILLATIONS. ON TAKEOFF WE PULLED APPROXIMATELY 95% TQ, AFTER ABOUT 5 SECONDS THE LEFT ENGINE ROLLED BACK TO ABOUT 70% TQ AND THE RIGHT SPIK
- [SDR 2023FA0000384](https://openairdocs.org/sdr/2023FA0000384.md): Transducer · abnormal · Mar 23, 2023 · N431MK · Skrsky S76C · Engine Controls
  > MOMENTARY PARTIAL POWER LOSS WITH YAW KICK AND LOSS OF TORQUE
- [SDR 2023FA0000388](https://openairdocs.org/sdr/2023FA0000388.md): Transducer · abnormal · Mar 16, 2023 · N991MK · Skrsky S76C · Engine Controls
  > ENGINE OUT INDICATION WITH A TORQUE SPLIT AND YAWING MOTION MOMENTARILY
- [SDR 2023F00074](https://openairdocs.org/sdr/2023F00074.md): Cable · inoperative · Mar 3, 2023 · N794P · Skrsky S76C · Landing Gear Retraction/Extension System
  > DURING INITIAL LANDING CHECK, THE GEAR LEVER WAS MOVE TO THE LOWERED POSITION. THE NOSE GEAR LIGHT WOULD NOT ILLUMINATE AND WAS INDICATING UNLOCKED. CREW VERIFIED THE LIGHT BULB WAS NOT THE FAULT. RTB HOUMA.
- [SDR 2023FA0000383](https://openairdocs.org/sdr/2023FA0000383.md): Transducer · abnormal · Mar 1, 2023 · N431MK · Skrsky S76C · Engine Controls
  > MOMENTARY PARTIAL POWER LOSS WITH YAW KICK AND LOSS OF TORQUE
- [SDR 2023FA0000085](https://openairdocs.org/sdr/2023FA0000085.md): Contactor · inoperative · Feb 10, 2023 · N714P · Skrsky S76C · Electrical Power System
  > DURING CRUISE IN IMC NO 2 DC GENERATOR FAILED AND DID NOT RESET AFTER EMERGENCY PROCEDURE WAS PERFORMED.
- [SDR YTRA22249](https://openairdocs.org/sdr/YTRA22249.md): Fire Detector · defective · Sep 2, 2022 · N781RL · Skrsky S76C · Fire Detection
  > AT APPROXIMATELY 10:30 AM ENROUTE FROM MC109 TO GALLIANO WHILE CRUISING AT 2200 FT AND ABOUT 45 MILES FROM THE BASE THE #1 ENGINE FIRE LIGHT ILLUMINATED WITH THE ASSOCIATED TONE. PILOTS WENT THROUGH EMERGENCY PROCEDURES AND DISCHARGED THE FIRE BOTTLE IN THE EN
- [SDR YTRA22244](https://openairdocs.org/sdr/YTRA22244.md): Smoke Detector · smoke · Sep 1, 2022 · N784RL · Skrsky S76C · Fire Detection
  > "AFT BAGGAGE" CAUTION LIGHT ILLUMINATED DURING DEPARTURE CLIMB OUT. ON LANDING THE SIC INSPECTED THE BAGGAGE COMPARTMENT AND NOTED SMOKE COMING OUT. THE PIC AND SIC THEN PROCEEDED TO REMOVE THE BAGGAGE AND COULD NOT FIND A SOURCE OF THE SMOKE. MAINTENANCE INSP
- [SDR YTRA2218101](https://openairdocs.org/sdr/YTRA2218101.md): Connector · burned · Jun 30, 2022 · N783RL · Skrsky S76C · Electrical Connectors
  > DURING THE FIRST ENGINE CHECK, SMOKE WAS DETECTED IN THE CABIN SO WE ABORTED THE CHECK SHUTDOWN THE ENGINES DOWN AND EVACUATED THE AIRCRAFT.
- [SDR 2023FA0000583](https://openairdocs.org/sdr/2023FA0000583.md): Keelbeam · corroded · Jun 27, 2022 · N725MF · Skrsky S76C · Fuselage Main, Keel
  > BONDED ASSY. KEEL BEAM PANEL CORRODED BEYOND LIMITS. REPLACED CORRODED KEEL BEAM WITH SERVICEABLE KEEL BEAM.
- [SDR 2022FA0000220](https://openairdocs.org/sdr/2022FA0000220.md): None · leaking · Apr 19, 2022 · N883AL · Skrsky S76C · Fuel Controlling System
  > ON CLIMB OUT FROM ARA THERE WAS A STRONG SMELL OF FUEL. ALL CREW MEMBERS SMELLED IT. RTB AND SHUT DOWN.
- [SDR 2023FA0000382](https://openairdocs.org/sdr/2023FA0000382.md): Transducer · abnormal · Mar 24, 2022 · N991MK · Skrsky S76C · Engine Controls
  > AIRCRAFT HAS A MOMENTARY POWER LOSS WITH ENGINE OUT INDICATION AND TORQUE SPLIT WITH A YAWING MOTION,
- [SDR 2023FA0000381](https://openairdocs.org/sdr/2023FA0000381.md): Transducer · abnormal · Mar 24, 2022 · N431MK · Skrsky S76C · Engine Controls
  > INFLIGHT MOMENTARY ENGINE ROLLBACK WITH YAW KICK AND TORQUE LOSS
- [SDR 2022FA0000632](https://openairdocs.org/sdr/2022FA0000632.md): Fire Warning · false indication · Feb 6, 2022 · N911LK · Skrsky S76C · Fuselage Structure (General)
  > FALSE FIRE WARNING DURING FIGHT
- [SDR ALGA2020073103002](https://openairdocs.org/sdr/ALGA2020073103002.md): Pump · failed · Jul 28, 2020 · N896BG · Skrsky S76C · Hydraulic Pump (Electric/Engine), Main
  > AFTER TAKEOFF, IN CRUISE, THE NR 1 HYDRAULICS INDICATOR DROPPED TO ZERO AND THE NR 1 SERVO LIGHT IN THE CAUTION ADVISORY PANEL ILLUMINATED BY SLIGHT FEED BACK IN THE CONTROLS. AFTER REFERENCING THE EMERGENCY CHECKLIST AND ACCOMPLISHING THE TASKS, DECLARED AN
- [SDR HEER202001023483](https://openairdocs.org/sdr/HEER202001023483.md): Wire · burned · Dec 23, 2019 · N794P · Skrsky S76C · Air Conditioning System Wiring
  > SMOKE IN CABIN. FOUND WIRE ON MOTOR BURNT/CHAFED. REPLACED A/C BLOWER ASSEMBLY.
- [SDR ALGA20191205154](https://openairdocs.org/sdr/ALGA20191205154.md): Duct · cracked · Dec 3, 2019 · N871AL · Skrsky S76C · Heating System
  > THE CABIN HEATER WAS ON AND AS USUAL SMALL AMOUNT OF SMOKE & ENGINE CLEANER ODOR IS PRESENT WHEN HEATER IS INITIALLY TURNED ON. CREW INFORMED PASSENGERS THAT THIS WAS NORMAL. DURING TAKEOFF THE AFT BAGGAGE COMPARTMENT LIGHT ILLUMINATED. TAKEOFF WAS ABORTED, R
- [SDR ALGA020190828087](https://openairdocs.org/sdr/ALGA020190828087.md): Magnetic Seal · leaking · Aug 24, 2019 · N871AL · Skrsky S76C · Turbine Engine Oil System
  > OIL PRESSURE ON #2 ENGINE FLUCTUATING BETWEEN 30-45PSI, OIL TEMP BEGAN TO DECREASE FROM 74 DEG C - 67 DEG C. OIL PRESSURE LIGHT ILLUMINATED. ENGINE WAS SECURED. CREW DIVERTED TO 2LS0.

Next page: https://openairdocs.org/model/keystone-helicopter-s-76c/reports.md?page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
WHERE aircraft_model_key = 'S76C'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/keystone-helicopter-s-76c/reports

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