# Service difficulty reports: N747WS

A list on [N747WS](https://openairdocs.org/aircraft/N747WS.md).

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first.

- [SDR HYIA20250506002](https://openairdocs.org/sdr/HYIA20250506002.md): Fitting · corroded · May 1, 2025 · N747WS · Cessna 402C · Wing, Attach Fittings
  > DURING SCHEDULED MAINTENANCE A SMALL AREA OF SURFACE CORROSION WAS VISUALLY IDENTIFIED ON THE RIGHT WING LOWER AFT WING FITTING. (OEM PN: 0822550-44). THIS CORROSION MEASURES APPROX..375" LONG WITH A MAX DEPTH OF APPROX..030" AND IS CONSISTENT WITH OTHER COR
- [SDR HYIA20250506001](https://openairdocs.org/sdr/HYIA20250506001.md): Door Frame · corroded · May 1, 2025 · N747WS · Cessna 402C · Fuselage Main, Structure
  > DURING MAINTENANCE, CORROSION DAMAGE WAS NOTED UNDERNEATH THE STRIKER PLATE FOR THE UPPER CLAMSHELL DOOR PIN ENGAGEMENT HOLE LOCATED ON THE MAIN CABIN DOOR POST. (F.S. 213.6) THE DEPTH OF THIS CORROSION IN GREATER THAN 25% OF THE THICKNESS OF THE DOOR POST AND
- [SDR HYIA20211101001](https://openairdocs.org/sdr/HYIA20211101001.md): Switch · dirty · Oct 27, 2021 · N747WS · Cessna 402CESSNA · Heating System
  > THE PILOT REPORTED A BURNING SMELL IN CABIN DURING FLIGHT. MAINTENANCE INSPECTED AND FOUND THE HEATER FLOW SWITCH DIRTY. THIS WAS CLEANED AND SUBSEQUENT HEATER RUN-UPS PRODUCED NO FURTHER DEFECTS NOTED.
- [SDR HYIA20210811001](https://openairdocs.org/sdr/HYIA20210811001.md): Attach Fitting · corroded · Aug 10, 2021 · N747WS · Cessna 402C · Wing, Fuselage Attach Fittings
  > DURING SCHEDULED MAINTENANCE, A SPOT OF INTERGRANULAR CORROSION WAS VISUALLY IDENTIFIED ON THE RIGHT HAND, UPPER, WING ATTACH FITTING. IT MEASURES APPROXIMATELY.520 INCHES LONG,.064 INCHES DEEP, AND.221 INCHES WIDE. IT IS LOCATED ON THE BOTTOM EDGE OF THE V
- [SDR HYIA20190611001](https://openairdocs.org/sdr/HYIA20190611001.md): Spring · broken · Jun 7, 2019 · N747WS · Cessna 402C · Master Cylinder/Brake Valve
  > PILOT REPORTED A LOUD BANG FROM THE RIGHT SIDE WHEEL, A LOSS OF RIGHT DIRECTIONAL CONTROL AND BRAKES, AND THE RIGHT RUDDER PEDAL FELT VERY LOOSE. MAINTENANCE INSPECTED AND FOUND THE RIGHT BRAKE MASTER CYLINDER SPRINGS BROKEN. THE MASTER CYLINDER WAS REPLACED W
- [SDR HYIA01042018001](https://openairdocs.org/sdr/HYIA01042018001.md): Fitting · cracked · Jan 3, 2019 · N747WS · Cessna 402C · Nacelle/Pylon Miscellaneous Structure
  > THE LT NACELLE OB FITTING WAS FOUND TO BE CRACKED AT THE LWR PORTION OF THE IB LEG WHILE PERFORMING INTIAL NDT (HFEC) TO SATISFY REQUIREMENT OF TEXTRON SID 57-10-16. THE FITTING DOES NOT APPEAR TO BE CORRODED OR OTHERWISE DAMAGED AND THERE DO NOT APPEAR TO BE
- [SDR HYIA20170124002](https://openairdocs.org/sdr/HYIA20170124002.md): Exhaust Valve · burned · Jan 20, 2017 · N747WS · Cessna 402C · Reciprocating Engine Cylinder Section
  > PILOT REPORTED THE LEFT ENGINE RUNNING ROUGH, AND CHT SHOWING 175 ON LEFT ENGINE. MAINTENANCE INSPECTED AND FOUND THE LEFT ENGINE CYLINDER NR 3 EXHAUST VALVE BURNT AND THE NR 4 CYLINDER EXHAUST VALVE BROKEN; BOTH CYLINDERS HAS A TOTAL TIME IN SERVICE OF 1382.
- [SDR HYIA20170124001](https://openairdocs.org/sdr/HYIA20170124001.md): Exhaust Valve · burned · Jan 20, 2017 · N747WS · Cessna 402C · Reciprocating Engine Cylinder Section
  > PILOT REPORTED THE LEFT ENGINE RUNNING ROUGH, AND CHT SHOWING 175 ON LEFT ENGINE. MAINTENANCE INSPECTED AND FOUND THE LEFT ENGINE CYLINDER NR 3 EXHAUST VALVE BURNED AND THE NR 4 CYLINDER EXHAUST VALVE BROKEN. BOTH CYLINDERS WERE REPLACED WITH NO FURTHER ISSU
- [SDR HYIA20160912133](https://openairdocs.org/sdr/HYIA20160912133.md): Exhaust Valve · damaged · Sep 9, 2016 · N747WS · Cessna 402C · Reciprocating Engine Cylinder Section
  > CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION. EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE.
- [SDR HYIA20160825088](https://openairdocs.org/sdr/HYIA20160825088.md): Exhaust Valve · damaged · Aug 20, 2016 · N747WS · Cessna 402C · Reciprocating Engine Cylinder Section
  > CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION. EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE.
- [SDR HYIA20160825087](https://openairdocs.org/sdr/HYIA20160825087.md): Exhaust Valve · low pressure · Aug 20, 2016 · N747WS · Cessna 402C · Reciprocating Engine Cylinder Section
  > CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION. EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE.
- [SDR HYIA20160803059](https://openairdocs.org/sdr/HYIA20160803059.md): Exhaust Valve · damaged · Jul 29, 2016 · N747WS · Cessna 402C · Reciprocating Engine Cylinder Section
  > CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION. EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE
- [SDR HYIA20160802005](https://openairdocs.org/sdr/HYIA20160802005.md): Exhaust Valve · damaged · Jun 11, 2016 · N747WS · Cessna 402C · Reciprocating Engine Cylinder Section
  > CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION. EXHAUST VALVE CRACKED AND DISPLAYS EVIDENCE OF HEAT DAMAGE.
- [SDR HYIA20160304002](https://openairdocs.org/sdr/HYIA20160304002.md): O-Ring · damaged · Feb 28, 2016 · N747WS · Cessna 402C · Aircraft Fuel Filter/Strainer
  > PILOT REPORTED FUEL SMELL IN COCKPIT. ACCESSED CABIN FUEL LINES & VISUALLY INSPECTED LINES. NO DEFECTS NOTED. LOCATED EVIDENCE OF FUEL LEAK AT THE LT FUEL FILTER BOWL. REPLACED LT FUEL FILTER BOWL O RINGS. PERFORMED OPERATIONAL LEAK CHECK. NO FURTHER LEA
- [SDR HYIA20160226001](https://openairdocs.org/sdr/HYIA20160226001.md): Unknown · odor · Feb 19, 2016 · N747WS · Cessna 402C · Air Distribution System
  > PILOT REPORTED FUEL SMELL IN CABIN. RAN ACFT, RAN HEATER & PERFORMED INSPECTION OF FUEL SYS COMPONENTS. AT NO POINT DURING INSPECTION WAS EVIDENCE OR SMELL OF FUEL DETECTED.
- [SDR HYIA20150820001](https://openairdocs.org/sdr/HYIA20150820001.md): Liner · defective · Aug 15, 2015 · N747WS · Cessna 402C · Landing Gear Brake System
  > PILOT REPORTED RT BRAKE DROPPED TO FLOOR AFTER LANDING & A VERY MUSHY FEEL. R & R THE RT BRAKE LINING ASSEMBLY & SERVICED THE HYD SYS IAW CHAPTER 32-40-00. OPERATIONS CHECKED SATISFACTORY AT THAT TIME.
- [SDR HYIA20150428002](https://openairdocs.org/sdr/HYIA20150428002.md): Master Cylinder · low · Apr 25, 2015 · N747WS · Cessna 402C · Master Cylinder/Brake Valve
  > PILOT REPORTED RT BRAKE INOPERATIVE. INSPECTED RT BRAKE SYS FOR LEAKS IN FUSELAGE, WING, & WW, NONE FOUND. SERVICED RT MASTER CYLINDER & BLED SYS AS PRECAUTION. OPERATIONALLY CHECKED WITH NO DEFECTS NOTED.
- [SDR HYIA20150320002](https://openairdocs.org/sdr/HYIA20150320002.md): Brake Sys · contaminated · Mar 18, 2015 · N747WS · Cessna 402C · Landing Gear Brake System
  > PILOT REPORTED RT BRAKE INOPERATIVE. INSPECTED, SERVICED & BLED BRAKE SYS. TAXI OPERATIONAL CHECKED GOOD.
- [SDR HYIA20141208001](https://openairdocs.org/sdr/HYIA20141208001.md): Engine · failed · Dec 4, 2014 · N747WS · Cessna 402C · Reciprocating Engine Power Section
  > RT ENG LOST POWER IN FLIGHT & ENDED UP SHUTTING IT DOWN. THE ACFT LANDED WITHOUT INCIDENT. UPON INSPECTION MX FOUND THE RT ENG CRANK CASE HAD BEEN PENETRATED. INITIAL INVESTIGATION LEADS UP TO BELIEVE A CONNECTING ROD SEPARATED FROM THE CRANKSHAFT. THE ENG
- [SDR HYIA20140414055](https://openairdocs.org/sdr/HYIA20140414055.md): Drag Brace · cracked · Dec 2, 2013 · N747WS · Cessna 402C · Landing Gear Retraction/Extension System
  > AT SCHEDULED INSPECTION, NLG DRAG BRACE, OEM PN 5142002-5, WAS FOUND TO BE CRACKED IN THE AREA OF NLG ACTUATOR ATTACH POINT. METHOD OF INSPECTION WAS DYE PENETRANT. THIS CRACK WAS FOUND TO BE BEYOND LIMIT ALLOWABLE. THIS UNIT HAS BEEN SCRAPPED & A REPLACEME
- [SDR HYIA20120817002](https://openairdocs.org/sdr/HYIA20120817002.md): Connector · shorted · Aug 16, 2012 · N747WS · Cessna 402C · Light System Wiring
  > PILOT REPORTED FLIGHT COMPARTMENT LIGHTS INOPERATIVE. SLIGHT ELECTRICAL ODOR NOTED WHEN SELECTED ON. ON MX INSPECTION, SYS WAS INSPECTED AND FOUND POST LIGHT CONNECTOR ABOVE CLOCK SHORTED AND SMOKING. NO OTHER DEFECTS NOTED. R & R POST LIGHT CONNECTOR. OPS C
- [SDR HYIA20140414009](https://openairdocs.org/sdr/HYIA20140414009.md): Drag Brace · cracked · Jan 16, 2012 · N747WS · Cessna 402C · Landing Gear Retraction/Extension System
  > AT SCHEDULED INSPECTION, NLG DRAG BRACE, PN 5142002-5, WAS FOUND TO BE CRACKED IN THE AREA OF NLG ACTUATOR ATTACH POINT. METHOD OF INSPECTION WAS DYE PENETRANT. THIS CRACK WAS FOUND TO BE BEYOND LIMIT ALLOWABLE OF MEB91-11R1. THIS UNIT HAS BEEN SCRAPPED & A
- [SDR HYIA20140415070](https://openairdocs.org/sdr/HYIA20140415070.md): Drag Brace · cracked · Aug 11, 2011 · N747WS · Cessna 402C · Landing Gear Retraction/Extension System
  > AT SCHEDULED INSPECTION, NLG DRAG BRACE, PN 5142002-5, WAS FOUND TO BE CRACKED IN THE AREA OF NLG ACTUATOR ATTACH POINT. METHOD OF INSPECTION WAS DYE PENETRANT. THIS CRACK WAS FOUND TO BE WITHIN ALLOWABLE LIMIT OF MEB91-11R1. THIS UNIT HAS BEEN REPAIRED IAW
- [SDR HYIA20140415046](https://openairdocs.org/sdr/HYIA20140415046.md): Drag Brace · cracked · Apr 12, 2011 · N747WS · Cessna 402C · Landing Gear Retraction/Extension System
  > AT SCHEDULED INSPECTION, NLG DRAG BRACE, OEM PN 5142002-5, WAS FOUND TO BE CRACKED IN THE AREA OF NLG ACTUATOR ATTACH POINT. METHOD OF INSPECTION WAS DYE PENETRANT. THIS CRACK WAS FOUND TO BE WITHIN ALLOWABLE LIMIT. THIS UNIT HAS BEEN REPAIRED IAW PROCEDURE
- [SDR HYIA20140415027](https://openairdocs.org/sdr/HYIA20140415027.md): Drag Brace · cracked · Feb 8, 2011 · N747WS · Cessna 402C · Landing Gear Retraction/Extension System
  > AT SCHEDULED INSPECTION, NLG DRAG BRACE OEM PN 5142002-5 WAS FOUND TO BE CRACKED IN THE AREA OF NLG ACTUATOR ATTACH POINT. METHOD OF INSPECTION WAS DYE PENETRANT. THIS CRACK WAS FOUND TO BE WITHIN ALLOWABLE LIMIT. THIS UNIT HAS BEEN REPAIRED IAW PROCEDURE O
- [SDR HYIA747LFTGEAR](https://openairdocs.org/sdr/HYIA747LFTGEAR.md): Downlock Switch · out of adjust · Jul 22, 2010 · N747WS · Cessna 402C · Landing Gear Position and Warning
  > ON APPROACH, CREW REPORTED LT MAIN GEAR DOWN AND LOCK INDICATOR FAILED TO ILLUMINATE. COMPLIED WITH EMERGENCY GEAR EXTENSION,STILL NO DOWN LOCK INDICATION, DECLARED EMERGENCY. LANDED WITHOUT INCIDENT. MAINTENANCE ADJUSTED LEFT MAIN GEAR DOWN LOCK SWITCH. COM
- [SDR GNB2007F00000](https://openairdocs.org/sdr/GNB2007F00000.md): Squat Switch · intermittent · Dec 11, 2006 · N747WS · Cessna 402C · Landing Gear Position and Warning
  > PILOT SELECTED GEAR UP AFTER TAKEOFF. GEAR DID NOT RETRACT. PILOT SELECTED GEAR DOWN AND RETURNED FOR AN UNEVENTFUL LANDING. SQUAT SWITCH INTERMITTENT. (K)
- [SDR GNB2006F00001](https://openairdocs.org/sdr/GNB2006F00001.md): Distributor Gear · stripped · Dec 5, 2005 · N747WS · Cessna 402C · Magneto/Distributor
  > PRE TAKEOFF RUNUP CHECKED GOOD. PULLED ONTO RUNWAY, APPLIED POWER, RT ENGINE BEGAN TO RUN ROUGH. ABORTED TAKEOFF. MAINTENANCE DISCOVERED 10-15 TEETH STRIPPED ON DISTRIBUTOR GEAR. VERY COLD TEMP, PROBABLE CAUSE. (SW01200603303) (K)
- [SDR 20010319CW008](https://openairdocs.org/sdr/20010319CW008.md): Control Cable · separated · Feb 1, 2001 · N747WS · Cessna 402C · Mixture Control
  > START UP, PILOT PUSHED MIXTURE FORWARD, COULD NOT START LEFT MOTOR OR GET FUEL FLOW. INVESTIGATION REVEALLED MIXTURE KNOB WOULD MOVE, ROD END AT MIXTURE CONTROL DID NOT. FOUND CABLE HOUSING SEPARATED FROM FACTORY CRIMP INSIDE FUSELAGE AT CONTROL COLUM AREA.
- [SDR 96ZZZX5658](https://openairdocs.org/sdr/96ZZZX5658.md): Post Light · shorted · Oct 28, 1996 · N747WS · Cessna 402C · Flight Compartment Lighting
  > PILOT REPORTED SEEING A SMALL AMOUNT OF SMOKE FROM UNDER COPILOT'S INSTRUMENT PANEL AND SMELLING SOMETHING 'ELECTRICAL' BURNING. UPON INSPECTION, A POST LIGHT WAS FOUND SHORTED. NO CIRCUIT BREAKERS TRIPPED. A VERY THIN SPRING INSIDE THE SCREW ON CONNECTOR B
- [SDR 96ZZZX5572](https://openairdocs.org/sdr/96ZZZX5572.md): Flow Valve · sticking · Oct 10, 1996 · N747WS · Cessna 402C · Airfoil Anti/De-ice System
  > WING DEICE BOOTS DID NOT FULLY DEFLATE AFTER NORMAL CYCLE. LEFT FLOW VALVE STUCK PARTIALLY OPEN. INSTALLED NEW VALVE. OPS CHECKED NORMAL.

## 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 n_number = 'N747WS' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N747WS/reports

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