# Service difficulty reports: Enstrom F-28F

A list on [Enstrom F-28F](https://openairdocs.org/model/enstrom-f-28f.md).

Newest first. General aviation reporting is voluntary.

- [SDR 2017FA0000418](https://openairdocs.org/sdr/2017FA0000418.md): Fuel Cell · deteriorated · Oct 14, 2016 · N128T · Enstrm F28F · Fuel Storage
  > DURING PREFLIGHT, SMALL PARTICLES WERE FOUND WHILE CHECKING THE FUEL SUMPS. ON FURTHER INVESTIGATION, IT WAS DETERMINED THAT THE EC776 SLOSHING COMPOUND INSTALLED BY THE FACTORY WAS SEPARATING FROM THE TANK. WE WERE ABLE TO REMOVE SOME PIECES THE SIZE OF A
- [SDR 2009FA0000284](https://openairdocs.org/sdr/2009FA0000284.md): Mount · cracked · Mar 31, 2009 · N620TA · Enstrm F28F · Engine Mount Section
  > TROUBLESHOOTING A TRACKING DISCREPANCY, IT WAS FOUND THAT THE RT FWD MOUNT LOCATION OF THE PYLON HAD CRACKED AS WELL AS THE GUSSET. THE CRACK WAS NOT VISIBLE THROUGH THE UPPER SIDE PANELS JUST BELOW THE FUEL TANKS. THE CRACK WAS NOT FOUND UNTIL THE FUEL TANK
- [SDR 2008FA0000654](https://openairdocs.org/sdr/2008FA0000654.md): Cylinder Head · damaged · Jul 23, 2008 · N8626E · Enstrm F28F · Reciprocating Engine Cylinder Section
  > DURING CYLINDER OVERHAUL A DAMAGE SEAT POCKET CUTTER USE USED. THIS RESULTED IN A VALVE SEAT POCKET THAT MEASURED WITHIN LIMITS BUT LACKED THE PROPER SURFACE CONTACT. AFTER APPROXIMATELY 3 HOURS OF ENGINE OPERATION, THE VALVE SEAT CAME OUT CAUSING THE INTAKE V
- [SDR EAHR200500002](https://openairdocs.org/sdr/EAHR200500002.md): Adapter · broken · Sep 30, 2005 · N8095 · Enstrm F28F · Exhaust Turbocharger
  > WELD BROKEN AT TURBO-CHARGER FLANGE.
- [SDR 2003FA0000351](https://openairdocs.org/sdr/2003FA0000351.md): Line · broken · Jan 4, 2002 · N8626A · Enstrm F28F · Aircraft Fuel Distribution System
  > THE TUBE FAILED ADJACENT TO FERRULE ON THE ENGINE DRIVEN FUEL PUMP FITTING. FAILURE WAS FOUND UPON REMOVAL OF THE PART FROM THE AIRCRAFT TO PERFORM OTHER MAINTENANCE. RECOMMEND CHANGING THIS RIDGED LINE TO A FLEXIBLE LINE;
- [SDR 20000524SH010](https://openairdocs.org/sdr/20000524SH010.md): Capacitor · failed · Apr 28, 2000 · N110PD · Enstrm F28F · Magneto/Distributor
  > SUBJECT CAPACITOR WAS INSTALLED NEW IN AUGUST, 1999. MAGNETO WAS PART OF SPARE ENGINE NOT INSTALLED UNTIL THIS MONTHV. THE CAPACITOR HAD VERY FEW HOURS (13.3 HRS) WHEN IT CAUSED HEAVY POINT RACING WHICH MELTED THE NYLON FOLLOWER. WHEN THIS HAPPENED, THE POI
- [SDR 20000615SH012](https://openairdocs.org/sdr/20000615SH012.md): Servo · leaking · Apr 4, 2000 · N756H · Enstrm F28F · Fuel Control/Reciprocating Engines
  > ENGINE QUIT IN-FLIGHT. HELICOPTER AUTOROTATED TO GROUND. INSPECTION FOUND FUEL LEAKING INSIDE THE SERVO. SERVO TO REPAIR STATION FOR REPAIR. DEBRIS FOUND IN BALL VALVE. FLUSHED SERVO, AND OPS CHECK OK. (X)
- [SDR 20000714SH022](https://openairdocs.org/sdr/20000714SH022.md): Guard · cracked · Jun 9, 1999 · N86243 · Enstrm F28F · Tail Rotor System
  > TAIL ROTOR GUARD CRACKED DUE TO VIBRATION.
- [SDR 99ZZZX1720](https://openairdocs.org/sdr/99ZZZX1720.md): Points · failed · Mar 24, 1999 · N756H · Enstrm F28F · Magneto/Distributor
  > POINTS CLOSED AND MAGNETO QUIT DUE TO MELTED CAM FOLLOWER. LYCOMING FACTORY OVERHAULED ENGINE, TELEDYNE CONT FACTORY OVERHAULED MAG, AND SLICK OVERHAULED HARNESS.
- [SDR 99ZZZX1719](https://openairdocs.org/sdr/99ZZZX1719.md): Capacitor · failed · Mar 24, 1999 · N756H · Enstrm F28F · Magneto/Distributor
  > POINTS CLOSED AND MAGNETO QUIT DUE TO MELTED CAM FOLLOWER. LYCOMING FACTORY OVERHAULED ENGINE, TELEDYNE CONT FACTORY OVERHAULED MAG, AND SLICK OVERHAULED HARNESS.
- [SDR 99ZZZX856](https://openairdocs.org/sdr/99ZZZX856.md): Gearbox · making metal · Jan 28, 1999 · N52PD · Enstrm F28F · Main Rotor Gearbox
  > 2.5 HOURS AFTER OIL CHANGE, M/R GEARBOX HAD CHIP LIGHT. LARGE FLAKES, BLACK OIL, SMELLED BURNT. OIL LEVEL CORRECT. OIL SAMPLE TAKEN.
- [SDR 98ZZZX1349](https://openairdocs.org/sdr/98ZZZX1349.md): Control Cable · binding · Mar 25, 1998 · N8626S · Enstrm F28F · Power Lever
  > THROTTLE CONTROL CABLE INTERNAL BINDING CAUSES PARTIAL TO FULL LOSS OF THROTTLE CONTROL. UNIT IN SERVICE 7 WEEKS.
- [SDR 98ZZZX1350](https://openairdocs.org/sdr/98ZZZX1350.md): Control Cable · binding · Mar 9, 1998 · N8624B · Enstrm F28F · Power Lever
  > THROTTLE CONTROL CABLE INTERNAL BINDING CAUSES PARTIAL TO FULL LOSS OF THROTTLE CONTROL. UNIT IN SERVICE 36 WEEKS.
- [SDR 98ZZZX1348](https://openairdocs.org/sdr/98ZZZX1348.md): Control Cable · binding · Mar 6, 1998 · N890JR · Enstrm F28F · Power Lever
  > THROTTLE CONTROL CABLE INTERNAL BINDING CAUSES PARTIAL TO FULL LOSS OF THROTTLE CONTROL. UNIT IN SERVICE 20 WEEKS.
- [SDR 97ZZZX4492](https://openairdocs.org/sdr/97ZZZX4492.md): Transmission · making metal · Oct 2, 1997 · N8626S · Enstrm F28F · Main Rotor Gearbox
  > TRANSMISSION GENERATING CHIP LIGHTS SINCE NEW ON AVERAGE OF 7-10 HOURS OF OPERATION. MFG SUGGESTED LESS SENSITIVE CHIP PLUG. XMSN CONTINUED TO GENERATE METAL. ACFT REMOVED FROM SERVICE WHEN PIECES REACHED.25 INCH IN LENGTH. MFG HAS NO PUBLISHED CRITERIA F
- [SDR 98ZZZX1351](https://openairdocs.org/sdr/98ZZZX1351.md): Control Cable · binding · Jul 8, 1997 · N8624B · Enstrm F28F · Power Lever
  > THROTTLE CONTROL CABLE INTERNAL BINDING CAUSES PARTIAL TO FULL LOSS OF THROTTLE CONTROL. UNIT IN SERVICE 12 WEEKS.
- [SDR 97ZZZX3759](https://openairdocs.org/sdr/97ZZZX3759.md): Amplifier · failed · Jun 25, 1997 · N99YC · Enstrm F28F · Main Rotor Indicating System
  > DURING CLIMB-OUT AT 200 FEET AND 60 MPH, THE ENGINE LOST POWER DUE TO THE NR 2 CYLINDER INTAKE VALVE ROCKER ARM SHAFT FALLING OUT OF THE CYLINDER HEAD. THE LOW ROTOR RPM WARNING HORN, A MAJOR SAFETY FEATURE IN MARKETING THE MODEL F28F, DID NOT SOUND OFF ALTHO
- [SDR 97ZZZX3758](https://openairdocs.org/sdr/97ZZZX3758.md): Seat · deformed · Jun 25, 1997 · N99YC · Enstrm F28F · Passenger Compartment Equipment
  > THIN COMPOSIT BENCH SEAT ACROSS 15.50 INCH WIDE ALUMINUM SEAT STRUCTURE. NOT ADEQUATE FOR TWO PASSENGERS. LOSS OF ENGINE POWER WHEN A VALVE ROCKER ARM SHAFT FELL OUT OF THE ENGINE AND A DEFECTIVE LOW ROTOR RPM WARNING HORN RESULTED IN A CRASH LANDING AND DAM
- [SDR 97ZZZX3551](https://openairdocs.org/sdr/97ZZZX3551.md): Rocker Shaft · failed · Jun 25, 1997 · N99YC · Enstrm F28F · Reciprocating Engine Cylinder Section
  > LOOSE RETAINING NUTS WORKED OFF STUDS ALLOWING THE PORT COVER TO FALL OFF AND NR 2 CYLINDER INTAKE VALVE ROCKER ARM SHAFT TO FALL OUT OF THE ENGINE RESULTING IN A CRASH LANDING. SUGGEST REVIEWING ENSTROM PRODUCTION CERTIFICATE AND TIGHTEN THE INSPECTION PROCED
- [SDR 97ZZZX2773](https://openairdocs.org/sdr/97ZZZX2773.md): Rod End Bearing · worn · May 19, 1997 · N890JR · Enstrm F28F · Tail Rotor Control System
  > ACCELERATED LATERAL BEARING WEAR. EXCEEDED LIMITS WITHIN 304 HOURS. THIS ROD END NORMALLY LASTS UP TO 1,000 HOURS IN SERVICE. INSTALLED 2 NEW 01-691-04 BEARINGS.
- [SDR 97ZZZX2554](https://openairdocs.org/sdr/97ZZZX2554.md): Rod End Bearing · worn · May 19, 1997 · N890JR · Enstrm F28F · Tail Rotor Control System
  > ACCELERATED LATERAL BEARING WEAR. EXCEEDED LIMITS WITHIN 304 HOURS. THIS ROD END NORMALLY LASTS UP TO 1,000 HRS IN SERVICE. INSTALLED 2 NEW 01-691-04 BEARINGS.
- [SDR 97ZZZX2769](https://openairdocs.org/sdr/97ZZZX2769.md): Universal Hsng · cracked · May 18, 1997 · N8624B · Enstrm F28F · Main Rotor Mast/Swashplate
  > MOUNTING WEBS FOR CONTROL ROD BEARINGS AND UNIVERSAL JOINT OF LOWER SWASHPLATE FOUND CRACKED AT INSPECTION. THIS IS A PRIMARY FLIGHT CONTROL PART. THIS PART HAS A RETIREMENT LIFE OF 17,700 HOURS. PART NON-REPAIRABLE. REPLACED WITH NEW PART 28-16119-1.
- [SDR 97ZZZX2771](https://openairdocs.org/sdr/97ZZZX2771.md): Universal Hsng · cracked · May 14, 1997 · N8626S · Enstrm F28F · Main Rotor Mast/Swashplate
  > MOUNTING WEBS FOR CONTROL ROD BEARINGS AND UNIVERSAL JOINT OF LOWER SWASHPLATE FOUND CRACKED AT INSPECTION. THIS IS A PRIMARY FLIGHT CONTROL PART. THIS PART HAS A RETIREMENT LIFE OF 17,700 HOURS. PART NON-REPAIRABLE. REPLACED WITH NEW PART 28-16119-1.
- [SDR 97ZZZX2557](https://openairdocs.org/sdr/97ZZZX2557.md): Universal Hsng · cracked · May 14, 1997 · N8626S · Enstrm F28F · Main Rotor Mast/Swashplate
  > MOUNTING WEBS FOR CONTORL ROD BEARINGS AND UNIVERSAL JOINT OF LOWER SWASHPLATE FOUND CRACKED AT INSPECTION. THIS IS A PRIMARY FLIGHT CONTROL PART. THIS PART HAS A RETIREMENT LIFE OF 17,700 HOURS. PART NON-REPAIRABLE. REPLACED WITH NEW PART 28-16119-1.
- [SDR 97ZZZX2556](https://openairdocs.org/sdr/97ZZZX2556.md): Universal Hsng · cracked · May 13, 1997 · N8624B · Enstrm F28F · Main Rotor Mast/Swashplate
  > MOUNTING WEBS FOR CONTORL ROD BEARINGS AND UNIVERSAL JOINT OF LOWER SWASHPLATE FOUND CRACKED AT INSPECTION. THIS IS A PRIMARY FLIGHT CONTROL PART. THIS PART HAS A RETIREMENT LIFE OF 17,700 HOURS. PART NON-REPAIRABLE. REPLACED WITH NEW PART 28-16119-1.
- [SDR 96ZZZX5175](https://openairdocs.org/sdr/96ZZZX5175.md): Relay · stuck contacts · Sep 11, 1996 · N890JR · Enstrm F28F · Main Rotor Control
  > POINTS IN RELAY FUSE TOGETHER CAUSING RUNAWAY TRIM ACTION RESULTING IN UNCONTROLLED ATTITUDES OF ACFT. REQUIRES TWO PILOTS ON CYCLIC TO OVERRIDE AND LAND ACFT. RELAY MFG (SIEMENS) HAS INDICATED THIS MAY NOT BE THE CORRECT RELAY FOR THIS APPLICATION. INSTALL
- [SDR 96ZZZX4104](https://openairdocs.org/sdr/96ZZZX4104.md): Rocker Cover · grooved · Jul 8, 1996 · N210PD · Enstrm F28F · Reciprocating Engine Cylinder Section
  > ENGINE DISASSEMBLED DUE TO ROTOR BLADE STRIKE. FOUND SEVERAL DEEP RINGS WORN IN ROCKER COVERS WHERE ROCKER SHAFTS RIDE. (NOT CAUSED BY ACCIDENT.) SUBMITTER STATED THIS PROBLEM HAS BEEN CORRECTED ON OTHER TYPES OF LYCOMINGS BY INSTALLATION OF PLASTIC THRUST
- [SDR 96ZZZX5540](https://openairdocs.org/sdr/96ZZZX5540.md): Yoke · cracked · Jun 7, 1996 · N890JR · Enstrm F28F · Main Rotor Mast/Swashplate
  > CRACKS FOUND BETWEEN CONTROL ROD AND UNIVERSAL YOKES. CRACK RUNS DOWN THE WEB BETWEEN BOTH AT 2 LOCATIONS. SUBMITTER STATED THIS IS SECOND FOUND THIS MONTH. THE OTHER CRACKED SWASHPLATE IS S/N 11-897-88H WITH SIMILAR TIME IN SERVICE. CRACKED SWASHPLATE YOK
- [SDR 96ZZZX4185](https://openairdocs.org/sdr/96ZZZX4185.md): Swashplate Yoke · cracked · Jun 7, 1996 · N890JR · Enstrm F28F · Main Rotor Mast/Swashplate
  > CRACKS FOUND BETWEEN CONTROL ROD AND UNIVERSAL YOKES. CRACK RUNS DOWN THE WEB BETWEEN BOTH AT 2 LOCATIONS. THIS IS SECOND FOUND THIS MONTH. THE OTHER CRACKED SWASHPLATE IS S/N 11-897-88H WITH SIMILAR TIME IN SERVICE. CRACKED SWASHPLATE YOKE REMOVED FROM SE
- [SDR 96ZZZX5176](https://openairdocs.org/sdr/96ZZZX5176.md): Relay · stuck contacts · May 21, 1996 · N8626S · Enstrm F28F · Main Rotor Control
  > POINTS IN RELAY FUSE TOGETHER CAUSING RUNAWAY TRIM ACTION RESULTING IN UNCONTROLLED ATTITUDES OF AIRCRAFT. REQUIRES BOTH PILOTS ON CYCLIC TO OVERRIDE. RELAY MFG HAS INDICATED THIS IS NOT THE CORRECT RELAY FOR THIS APPLICATION. INSTALLED NEW RELAY PER MM.
- [SDR 96ZZZX2936](https://openairdocs.org/sdr/96ZZZX2936.md): Relay · failed · May 21, 1996 · N8626S · Enstrm F28F · Rotorcraft Flight Control
  > POINTS IN RELAY FUSE TOGETHER CAUSING RUNAWAY TRIM ACTION RESULTING IN UNCONTROLLED ATTITUDES OF AIRCRAFT. REQUIRES BOTH PILOTS ON CYCLIC TO OVERRIDE. RELAY MFG HAS INDICATED THIS IS NOT THE CORRECT RELAY FOR THIS APPLICATION. INSTALLED NEW RELAY PER MM.
- [SDR 97ZZZX2770](https://openairdocs.org/sdr/97ZZZX2770.md): Universal Hsng · cracked · May 6, 1996 · N8626S · Enstrm F28F · Main Rotor Mast/Swashplate
  > MOUNTING WEBS FOR CONTROL ROD BEARINGS AND UNIVERSAL JOINT OF LOWER SWASHPLATE FOUND CRACKED AT INSPECTION. THIS IS A PRIMARY FLIGHT CONTROL PART. THIS PART HAS A RETIREMENT LIFE OF 17,700 HOURS. PART NON-REPAIRABLE. REPLACED WITH SERVICEABLE PART 28-16119
- [SDR 97ZZZX2555](https://openairdocs.org/sdr/97ZZZX2555.md): Universal Hsng · cracked · May 6, 1996 · N8626S · Enstrm F28F · Main Rotor Mast/Swashplate
  > MOUNTING WEBS FOR CONTROL ROD BEARINGS AND UNIVERSAL JOINT OF LOWER SWASHPLATE FOUND CRACKED AT INSPECTION. THIS IS A PRIMARY FLIGHT CONTROL PART. THIS PART HAS A RETIREMENT LIFE OF 17,700 HOURS. PART NON-REPAIRABLE. REPLACED WITH SERVICEABLE PART 28-16119
- [SDR 96ZZZX2937](https://openairdocs.org/sdr/96ZZZX2937.md): Transmission · making metal · May 2, 1996 · N8626S · Enstrm F28F · Main Rotor Gearbox
  > TRANSMISSION GENERATING CHIP LIGHTS EVERY FIVE MINUTES OF OPERATION. TOOTH OF RING GEAR HAD CHUNK MISSING 1.25 INCHES LONG BY.25 INCH DEEP. INSTALLED ZERO TIME OVERHAUL TRANSMISSION.
- [SDR 96ZZZX2796](https://openairdocs.org/sdr/96ZZZX2796.md): Wastegate · failed · Apr 8, 1996 · N8624G · Enstrm F28F · Exhaust Turbocharger
  > BUTTERFLY IN WASTEGATE WARPED AND LOSE FROM CRACKED WELDS JAMMING THROTTLE. BUTTERFLY SHAFT WORN AT PIVOT POINTS ALSO CAUSING THROTTLE BINDING. SUBMITTER STATES COMMON TO ALL F28F AND F280FX MODELS. REQUIRES REPLACEMENT OF WASTEGATE.
- [SDR 96ZZZX2789](https://openairdocs.org/sdr/96ZZZX2789.md): Control Cable · frayed · Apr 1, 1996 · N8627J · Enstrm F28F · Tail Rotor Control System
  > INFORMATION APPLICABLE TO MODELS, F28C, F28C-2 F28-F, 280F, 280FX. INSPECTION FOUND TAIL ROTOR CABLES FRAYED WHERE THEY PASS OVER THE AFT ALIGNMENT PULLEYS IN THE TAIL CONE. PULLEYS WERE LUBED, FREE AND TURNING. SUSPECT VIBRATION WAS CAUSING CABLES TO RATTL
- [SDR CA960227012](https://openairdocs.org/sdr/CA960227012.md): Clamp · cracked · Feb 7, 1996 · Enstrm F28F · Main Landing Gear Strut/Axle/Truck
  > (CAN)CRACKED CLAMP ON FORWARD CROSSTUBE. AIRCRAFT USED AS A TRAINER.
- [SDR 96ZZZX615](https://openairdocs.org/sdr/96ZZZX615.md): Wastegate · warped · Jan 24, 1996 · N8626S · Enstrm F28F · Exhaust Turbocharger
  > BUTTERFLY IN WASTEGATE FOUND WARPED AT EACH 100-HOUR INSPECTION. WARPED WASTEGATE AND WORN BUTTERFLY AND SHAFT CAUSE THROTTLE BINDING. BUTTERFLY MUST BE STRAIGHTENED FOR PROPER RIGGING. ON SOME AIRCRAFT, BUTTERFLIES COME OFF OF SHAFT AND BIND THROTTLE. COM

## 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 = 'F28F'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/enstrom-f-28f/reports

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