# Service difficulty reports: N494SP

A list on [N494SP](https://openairdocs.org/aircraft/N494SP.md).

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

- [SDR 2001FA0000130](https://openairdocs.org/sdr/2001FA0000130.md): Cylinder · overheated · Jun 29, 2001 · N494SP · Cessna 172S · Powerplant System
  > PILOT REPORTED ENGINE STARTED RUNNING ROUGH IN FLIGHT AND LOOSING ALTITUDE. MADE EMERGANCY LANDING, WENT OFF END OF RUNWAY AND WENT UPSIDE DOWN. AIRCRAFT RIGHTED AND MOVED TO HANGER. MAINTENANCE FOUND #2 CYLINDER EXHAUST PUSHROD BENT IN HALF & BROKEN, THE P
- [SDR 20010410AP015](https://openairdocs.org/sdr/20010410AP015.md): Fuel Control · malfunctioned · Mar 16, 2001 · N494SP · Cessna 172S · Fuel Control/Reciprocating Engines
  > ENGINE RSA-5AD1 FUEL SERVO WILL NOT MEET SPECIFICATIONS. FUEL FLOW BELOW 1700 RPM IS TOO HIGH. IDLE SPEED AND MIXTURE CAN NOT BE SET TO MFG SPECIFICATIONS WITH SATISFACTORY ENGINE OPERATION. FUEL SERVO REMOVED, SENT FOR REPAIRS. MAJOR REPAIRS ACCOMPLISHED
- [SDR 20010323CW016](https://openairdocs.org/sdr/20010323CW016.md): Control Unit · broken · Jan 24, 2001 · N494SP · Cessna 172S · Flight Compartment Equipment
  > CO-PILOTS SEAT LOCK CONTROL ASSEMBLY WOULD NOT RELEASE SEAT LOCK PIN. MAINTENANCE FOUND THE RIGHT LOCK PIN CABLE BROKEN. REPLACED CONTROL ASSEMBLY PN161102105. THIS HAS BEEN A REOCCURRING PROBLEM ON NEW SEATS.
- [SDR 2000ZZZX77](https://openairdocs.org/sdr/2000ZZZX77.md): Thermocouple · inoperative · Dec 16, 1999 · N494SP · Cessna 172S · Engine EGT/TIT Indicating System
  > PILOT DISCREPANCY, EGT INOPERATIVE. DURING PHASE 3 INSPECTION, FOUND THERMOCOUPLE LEADS SEPARATED FROM THERMOCOUPLE. REPLACED EGT THERMOCOUPLE, OPERATIONAL CHECK SATISFACTORY. SUBMITTER STATED ON A FLEET OF 5 NEW C-172S AIRCRAFT, THIS IS THE 10TH FAILURE IN
- [SDR 2000ZZZX76](https://openairdocs.org/sdr/2000ZZZX76.md): Panel · misinstalled · Dec 16, 1999 · N494SP · Cessna 172S · Fuselage Miscellaneous Structure
  > DURING PHASE 3 INSPECTION, REMOVED RT AFT TRIM PANEL AND FOUND 1 ATTACH SCREW WAS DRILLED THROUGH DOORPOST STRUCTURAL RIVET. REPLACED RIVET AND RELOCATED PANEL ATTACH SCREW WITH NEW TRIM PANEL.
- [SDR 2000ZZZX75](https://openairdocs.org/sdr/2000ZZZX75.md): Skin · cracked · Dec 16, 1999 · N494SP · Cessna 172S · Wing, Plate/Skin
  > DURING PHASE 3 INSPECTION, FOUND RT UPPER WING TRAILING EDGE SKIN ABOVE FLAP WELL HAD A 1 INCH CRACK IN THE TRAILING EDGE SKIN AT THE3RD RIVET FROM INBD TRAILING EDGE. REPLACED SKIN P/N 0523011-53, RESEALED FUEL CELL, PAINTED SKIN AND LEAK CHECKED.
- [SDR 2000ZZZX74](https://openairdocs.org/sdr/2000ZZZX74.md): Skin · cracked · Dec 16, 1999 · N494SP · Cessna 172S · Wing, Plate/Skin
  > DURING PHASE 3 INSPECTION, FOUND LT UPPER WING TRAILING EDGE SKIN ABOVE FLAP WELL HAD A 1 INCH CRACK IN THE TRAILING EDGE SKIN AT THE 3RD RIVET FROM INBD TRAILING EDGE. REPLACED SKIN P/N 0523011-53, RELEASED FUEL CELL, PAINTED SKIN AND LEAK CHECKED.
- [SDR 2000ZZZX73](https://openairdocs.org/sdr/2000ZZZX73.md): Skin · cracked · Dec 16, 1999 · N494SP · Cessna 172S · Trailing Edge Flaps
  > DURING PHASE 3 INSPECTION, FOUND RT FLAP LOWER SKIN TRAILING EDGE CRACKED IN TWO LOCATIONS, THE 13TH AND 16TH RIVETS FROM THE INBD END HAD CRACKS OF.25 INCH AND.50 INCH. REPLACED FLAP ASSEMBLY WITH FACTORY NEW ASSY AND PAINTED.
- [SDR 2000ZZZX72](https://openairdocs.org/sdr/2000ZZZX72.md): Shock Mount · torn · Dec 16, 1999 · N494SP · Cessna 172S · Engine Mount Section
  > DURING PHASE 3 INSPECTION, FOUND 4 LOWER COWL ATTACH SHOCK MOUNTS TORN AT THE BASE. REPLACED SHOCK MOUNTS.
- [SDR 99ZZZX4621](https://openairdocs.org/sdr/99ZZZX4621.md): Thermocouple · inoperative · Nov 23, 1999 · N494SP · Cessna 172S · Engine EGT/TIT Indicating System
  > EGT THERMOCOUPLE INOPERATIVE. WIRES ARE SEPARATED FROM PROBE. TOTAL AIRFRAME TIME 482.8 HOURS AND SUBMITTER STATED THIS IS THE SECOND EGT THERMOCOUPLE REPLACED ON THIS AIRCRAFT. REPLACED EGT THERMOCOUPLE, OPERATIONAL CHECKED SATISFACTORY.
- [SDR 99ZZZX4620](https://openairdocs.org/sdr/99ZZZX4620.md): Indicator · failed · Nov 23, 1999 · N494SP · Cessna 172S · Attitude Gyro and Indicating System
  > ATTITUDE INDICATOR TUMBLED FOR ABOUT 45 MINUTES ON A CROSS-COUNTRY FLIGHT BEFORE RE-ERECTING. VACUUM SYSTEM TESTS SATISFACTORY, NO OTHER DEFECTS NOTED. REPLACED GYRO, FURTHER OPERATION SATISFACTORY.
- [SDR 99ZZZX4619](https://openairdocs.org/sdr/99ZZZX4619.md): Rivet · cracked · Nov 23, 1999 · N494SP · Cessna 172S · Trailing Edge Flaps
  > DURING FIRST PHASE 3 INSPECTION WITH TOTAL AIRFRAME TIME OF 482.8 HOURS, FOUND RT FLAP TRAILING EDGE RIVETS HAD CRACKS AROUND 2 RIVETS. THE CRACKS WERE AROUND THE 13TH AND 16TH RIVETS FROM THE INBOARD END. ONE CRACK.50 INCH IN LENGTH, THE OTHER.25 INCH IN
- [SDR 99ZZZX4618](https://openairdocs.org/sdr/99ZZZX4618.md): Skin · cracked · Nov 23, 1999 · N494SP · Cessna 172S · Wing, Plate/Skin
  > DURING FIRST PHASE 3 INSPECTION, FOUND RT UPPER WING TRAILING EDGE SKIN ASSY CRACKED. THE THIRD RIVET FROM INBOARD TRAILING EDGE HAD A ONE INCH CRACK EMANATING FROM THE RIVET HEAD. REPLACED TRAILING EDGE SKIN AND RE-PAINTED.
- [SDR 99ZZZX4520](https://openairdocs.org/sdr/99ZZZX4520.md): Skin · cracked · Nov 23, 1999 · N494SP · Cessna 172S · Wing, Plate/Skin
  > DURING FIRST PHASE 3 INSPECTION, FOUND LT UPPER WING TRAILING EDGE SKIN ASSY CRACKED. THE 3RD RIVET FROM INBOARD TRAILING EDGE HAD A 1 INCH CRACK EMANATING FROM THE RIVET HEAD. REPLACED TRAILING EDGE SKIN AND RE-PAINTED.
- [SDR 99ZZZX4228](https://openairdocs.org/sdr/99ZZZX4228.md): Elbow · leaking · Oct 4, 1999 · N494SP · Cessna 172S · Aircraft Fuel Distribution System
  > DURING PHASE I INSPECTION, FOUND FUEL LEAKING OUT OF AIR INLET ELBOW ADAPTER. ADAPTER OVERBOARD DRAIN IS RIVETED AND SEALED TO ELBOW. SEALANT MISSING AROUND ONE RIVET AND FUEL LEAKS OUT OF ADAPTER BASE INTO ENGINE COWLING.
- [SDR 99ZZZX2940](https://openairdocs.org/sdr/99ZZZX2940.md): Connector · loose · Jul 21, 1999 · N494SP · Cessna 172S · Engine Oil Pressure
  > NEW C-172S ON CROSS-COUNTRY FLIGHT, OIL PRESSURE STARTED FLUCTUATING. OIL TEMP NORMAL AND NO LOW OIL PRESSURE LIGHT ILLUMINATION. OIL PRESSURE GAUGE STARTED FLUCTUATING OFF SCALE LOW. PRECAUTIONARY LANDING MADE. MAINTENANCE FOUND OIL PRESSURE GAUGE CONNECT
- [SDR 99ZZZX2733](https://openairdocs.org/sdr/99ZZZX2733.md): Fitting · bent · Apr 2, 1999 · N494SP · Cessna 172S · Flight Compartment Equipment
  > PILOT'S SEAT BACK IN FULL UPRIGHT POSITION WAS RECLINED 3 INCHES FROM FULL UPRIGHT. THE PILOT'S SEAT BACK SUPPORT FITTING WAS BENT. THIS IS THE SECOND DEFECTIVE SEAT BACK FITTING REPLACED ON THE PILOT'S SEAT BACK. THE FIRST ONE WAS REPLACED AT 23.6 HOURS TO
- [SDR 99ZZZX1732](https://openairdocs.org/sdr/99ZZZX1732.md): Fitting · bent · Mar 30, 1999 · N494SP · Cessna 172S · Flight Compartment Equipment
  > NEW CESSNA, PILOT'S SEAT BACK IN FULL UPRIGHT POSITION WAS RECLINED APPROXIMATELY 4 INCHES. FOUND L-SEATBACK ATTACH FITTING P/N 0514215-8 WAS BENT ONE INCH AFT. SUBMITTER STATED THIS PART WAS REPLACED FOR THE SAME PROBLEM 25.7 HOURS AGO.
- [SDR 99ZZZX1111](https://openairdocs.org/sdr/99ZZZX1111.md): Starter · failed · Mar 4, 1999 · N494SP · Cessna 172S · Engine Starter
  > NEW CESSNA WITH 54.7 HOURS, STARTER FAILED. REMOVED LAMAR STARTER, PN PM2401, SN 80098132, THE END CAP WAS REMOVED REVEALING TWO MELTED BRUSH TERMINAL LEADS WHERE THEY ATTACH TO THE BRUSHES. TT ON STARTER 54.7 HOURS.
- [SDR 99ZZZX1110](https://openairdocs.org/sdr/99ZZZX1110.md): Support · cracked · Mar 4, 1999 · N494SP · Cessna 172S · Reciprocating Engine Power Section
  > NEW CESSNA WITH 50.0 HOURS UNDERGOING FIRST PHASE INSPECTION. FOUND ENGINE STARTER RING GEAR SUPPORT ASSY, PN 31M22045, HAD VISIBLE CRACK ON FRONT FACE. WHEN REMOVED, AFT SIDE ADJACENT TO CRACK HAD CASTING FLAW.
- [SDR 99ZZZX1003](https://openairdocs.org/sdr/99ZZZX1003.md): Bulkhead · broken · Feb 24, 1999 · N494SP · Cessna 172S · Propeller Spinner Section
  > NEW CESSNA WITH 50.0 HOURS, AFTER LAST FLIGHT PRIOR TO PHASE 1 INSPECTION, FOUND AFT PROPELLER SPINNER BULKHEAD BROKEN AT THE FIRST NUTPLATE FROM ONE BLADE CUT-OUT, APPROXIMATELY A 1 INCH PIECE BROKE OUT WITH NUTPLATE. THE BROKEN PIECE STILL ATTACHED TO PROPE
- [SDR 99ZZZX1001](https://openairdocs.org/sdr/99ZZZX1001.md): Support · cracked · Feb 24, 1999 · N494SP · Cessna 172S · Engine Starter
  > NEW CESSNA WITH 50.0 HOURS, WHILE ACCOMPLISHING A PHASE 1 INSPECTION, FOUND THE STARTER RING GEAR SUPPORT ASSY HAD A 1.50 INCH CRACK ON THE OUTER FACE.25 INCH AFT OF THE FRONT FACE. REMOVAL OF THE PROPELLER AND SUPPORT ASSY REVEALED A CASTING DEFECT ON THE A
- [SDR 99ZZZX990](https://openairdocs.org/sdr/99ZZZX990.md): Fitting · mismanufactured · Feb 18, 1999 · N494SP · Cessna 172S · Cabin Equipment/Furnishings
  > NEW CESSNA WITH 39.4 HOURS. PILOT'S SEAT BACK WOULD NOT SWING FORWARD FOR ACCESS TO REAR SEAT. LOOSENED RECLINE CYLINDER BOLT IN L-SEAL BACK FITTING SO SEAT BACK WOULD SWING FORWARD. WITH THIS BOLT LOOSE AS REQUIRED, FOUND SEAT BACK IN FULL UPRIGHT POSITION
- [SDR 99ZZZX989](https://openairdocs.org/sdr/99ZZZX989.md): Piston Pin · worn · Jan 28, 1999 · N494SP · Cessna 172S · Reciprocating Engine Cylinder Section
  > NEW CESSNA WITH 24.1 HOURS, DRAINED OIL AND REPLACED OIL FILTER. WHEN FILTER WAS CUT OPEN AND INSPECTED FOUND EXCESSIVE AMOUNT OF ALUMINUM IN FILTER. NOTIFIED CESSNA AND LYCOMING. THEY REQUIRED A PIECE OF FILTER TO ANALYZE. AFTER ANALYSIS, LYCOMING ADVISED
- [SDR 99ZZZX988](https://openairdocs.org/sdr/99ZZZX988.md): Piston Pin · worn · Jan 28, 1999 · N494SP · Cessna 172S · Reciprocating Engine Cylinder Section
  > NEW CESSNA WITH 24.1 HOURS, DRAINED OIL AND REPLACED OIL FILTER. WHEN FILTER WAS CUT OPEN AND INSPECTED FOUND EXCESSIVE AMOUNT OF ALUMINUM IN FILTER. NOTIFIED CESSNA AND LYCOMING. THEY REQUIRED A PIECE OF FILTER TO ANALYZE. AFTER ANALYSIS, LYCOMING ADVISED
- [SDR 99ZZZX987](https://openairdocs.org/sdr/99ZZZX987.md): Piston Pin · worn · Jan 28, 1999 · N494SP · Cessna 172S · Reciprocating Engine Cylinder Section
  > NEW CESSNA WITH 24.1 HOURS, DRAINED OIL AND REPLACED OIL FILTER. WHEN FILTER WAS CUT OPEN AND INSPECTED FOUND EXCESSIVE AMOUNT OF ALUMINUM IN FILTER. NOTIFIED CESSNA AND LYCOMING. THEY REQUIRED A PIECE OF FILTER TO ANALYZE. AFTER ANALYSIS, LYCOMING ADVISED
- [SDR 99ZZZX986](https://openairdocs.org/sdr/99ZZZX986.md): Piston Pin · worn · Jan 28, 1999 · N494SP · Cessna 172S · Reciprocating Engine Cylinder Section
  > NEW CESSNA WITH 24.1 HOURS, DRAINED OIL AND REPLACED OIL FILTER. WHEN FILTER WAS CUT OPEN AND INSPECTED FOUND EXCESSIVE AMOUNT OF ALUMINUM IN FILTER. NOTIFIED CESSNA AND LYCOMING. THEY REQUIRED A PIECE OF FILTER TO ANALYZE. AFTER ANALYSIS, LYCOMING ADVISED
- [SDR 99ZZZX998](https://openairdocs.org/sdr/99ZZZX998.md): Tab · out of adjust · Jan 8, 1999 · N494SP · Cessna 172S · Elevator Tab Control System
  > ACCEPTANCE INSPECTION ON NEW CESSNA WITH 8.0 HOURS SINCE MANUFACTURE REVEALED ELEVATOR TRIM TAB OUT OF ADJUSTMENT. NEUTRAL POSITION WAS UP.25 INCH AND THE UP/DOWN LIMITS WERE 25 DEGREES/27 DEGREES. THE TRIM TAB WAS ADJUSTED TO NEUTRAL AND THE UP/DOWN STOPS
- [SDR 99ZZZX997](https://openairdocs.org/sdr/99ZZZX997.md): Light · broken · Jan 8, 1999 · N494SP · Cessna 172S · Fuel Indicating System
  > ACCEPTANCE INSPECTION OF NEW CESSNA WITH 8.0 HOURS SINCE MANUFACTURE REVEALED THE FUEL SELECTOR LIGHT WAS INOPERATIVE. THE LIGHT SOCKET BASE WAS BROKEN. REPLACED SOCKET AND OPERATIONAL CHECKED SATISFACTORY.
- [SDR 99ZZZX996](https://openairdocs.org/sdr/99ZZZX996.md): Control Cable · out of adj · Jan 8, 1999 · N494SP · Cessna 172S · Control Column Section
  > ACCEPTANCE INSPECTION ON NEW CESSNA WITH 8.0 HOURS SINCE MANUFACTURE REVEALED THE PILOTS AND COPILOTS YOKES WERE NOT ALIGNED IN NEUTRAL. ADJUSTED CABLE TO ALIGN YOKES THAN CHECKED CARRY-THROUGH CABLE TENSION AND FOUND IT ADJUSTED TO 58 POUNDS. ADJUSTED CABLE
- [SDR 99ZZZX995](https://openairdocs.org/sdr/99ZZZX995.md): Control Cable · out of adj · Jan 8, 1999 · N494SP · Cessna 172S · Rudder Control System
  > ACCEPTANCE INSPECTION ON NEW CESSNA WITH 8.0 HOURS SINCE MANUFACTURE REVEALED THE RUDDER WAS NOT CENTERED WITH THE NOSE WHEEL CENTERED. ADJUSTED CABLE TENSION TO ALIGN RUDDER AND RUDDER PEDALS.
- [SDR 99ZZZX994](https://openairdocs.org/sdr/99ZZZX994.md): Line · misinstalled · Jan 8, 1999 · N494SP · Cessna 172S · Pitot/Static System
  > ACCEPTANCE INSPECTION ON NEW CESSNA WITH 8.0 HOURS SINCE MANUFACTUE REVEALED WITH FULL AFT ELEVATOR, THE YOKE HIT THE ALTERNATE STATIC SOURCE VALVE T-FITTING RESTRICTING ELEVATOR TRAVEL. RE-ROUTED ALTERNATE STATIC SOURCE LINES AND T-FITTING.
- [SDR 99ZZZX993](https://openairdocs.org/sdr/99ZZZX993.md): Cowl · misinstalled · Jan 8, 1999 · N494SP · Cessna 172S · Engine Cowling System
  > ACCEPTANCE INSPECTION OF NEW CESSNA WITH 8.0 HOURS SINCE MANUFACTURE REVEALED THE LOWER ENGINE COWLING WAS CHAFING THE FUSELAGE AT THE 3 AND 10 O'CLOCK POSITIONS. RE-SHIMMED THE 3 AND 10 O'CLOCK COWL SHOCK MOUNTS BY ADDING SPACERS ELIMINATED CHAFING.
- [SDR 99ZZZX992](https://openairdocs.org/sdr/99ZZZX992.md): Belt · loose · Jan 8, 1999 · N494SP · Cessna 172S · DC Generator-Alternator
  > ACCEPTANCE INSPECTION OF NEW CESSNA WITH 8.0 HOURS SINCE MANUFACTURE REVEALED THE ALTERNATOR BELT TENSION WAS LOOSE. ADJUSTED TENSION WITHIN LIMITS, 11 TO 13 FEET/POUNDS.
- [SDR 99ZZZX991](https://openairdocs.org/sdr/99ZZZX991.md): Tachometer · mismanufactured · Jan 8, 1999 · N494SP · Cessna 172S · Engine RPM Indicating System
  > ACCEPTANCE INSPECTION OF NEW CESSNA WITH 8.0 HOURS SINCE MANUFACTURE REVEALED THE TACHOMETER WAS IN ERROR. A CALIBRATED TACHOMETER TESTER INDICATED THE AIRCRAFT TACHOMETER WAS 25 RPM'S LOW AT TAKEOFF AND 75 RPM'S LOW AT IDLE. A REPLACEMENT TACHOMETER IS BEIN
- [SDR 99ZZZX1009](https://openairdocs.org/sdr/99ZZZX1009.md): Bolt · misinstalled · Jan 8, 1999 · N494SP · Cessna 172S · Heating System
  > ACCEPTANCE INSPECTION ON NEW CESSNA WITH 8.0 HOURS SINCE MANUFACTURE REVEALED THE CABIN HEAT VALVE CABLE RETAINER BOLT WAS PROTRUDING THROUGH THE ACTUATOR ARM AND CHAFING ON THE HOUSING. THE BOLT WASHER CONFIGURATION WAS INCORRECT LOCKING THE ACTUATOR CABLE T

## 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 = 'N494SP' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N494SP/reports

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