# Service difficulty reports: Cessna 401A

A list on [Cessna 401A](https://openairdocs.org/model/cessna-401a.md).

Newest first. General aviation reporting is voluntary.

- [SDR CA150511004](https://openairdocs.org/sdr/CA150511004.md): Engine · power loss · Apr 16, 2015 · Cessna 401A · Engine (Turbine/Turboprop)
  > (CAN) DURING TAKEOFF, THE PILOT ADVANCED BOTH PLAS TO TAKEOFF & NOTICED THAT THE NR 1 ENG DID NOT RESPOND FROM THE IDLE SPEED OF 28% N1. THE PILOT ABORTED THE MISSION & RETURNED TO THE GATE & TRIED AGAIN WITH NO ABILITY TO ADVANCE POWER ON THE SUSPECT ENG NR
- [SDR EBTR20150309008](https://openairdocs.org/sdr/EBTR20150309008.md): Unknown · unknown · Mar 5, 2015 · N401GS · Cessna 401A · Engine (Reciprocating)
  > SHORTLY AFTER TAKE-OFF AT APPROXIMATELY 200 FT AGL, PILOT NOTICED PARTIAL LEFT ENGINE POWER LOSS WITH ENGINE FUEL FLOW SURGING FROM MINIMUM TO MAXIMUM. DECLARED AN EMERGENCY RETURNED AND LANDED. NOTICED WHEN PULLING POWER BACK TO LAND PROBLEM LEFT. VISUAL
- [SDR EBTR20130305007](https://openairdocs.org/sdr/EBTR20130305007.md): Lug · failed · Mar 5, 2013 · N401GS · Cessna 401A · Engine Mount Section
  > APPROXIMATELY 1.5 HRS INTO FLIGHT, PILOT NOTED RT ENGINE MANIFOLD PRESSURE DROPPED AFTER SWITCHING FUEL TANKS ADJUSTED POWER, ENGINE MANIFOLD PRESSURE DROPPED AND SURGED, PILOT NOTICED OIL ON TOP OF RT ENG COWL AND OIL PRESSURE LOW AND SURGING, REDUCED POWER
- [SDR EBTR20120712006](https://openairdocs.org/sdr/EBTR20120712006.md): Control Cable · broken · Jul 9, 2012 · N401GS · Cessna 401A · Aileron Control System
  > ON APPROACH PILOT SELECTED FULL FLAPS, HEARD LOUD POP AIRCRAFT WANTED TO ROLL RIGHT. CORRECTED WITH AILERON, DECLARED EMERGENCY AND LANDED WITHOUT INCIDENCE. INSPECTED AIRCRAFT FOUND THAT A FLOOR PANEL CLIP NUT HAD BECOME CAUGHT IN FLAP DRIVE GEAR/CHAIN CAUS
- [SDR CA090710007](https://openairdocs.org/sdr/CA090710007.md): Screw · broken · Jul 9, 2009 · Cessna 401A · Main Landing Gear
  > (CAN) RT MLG COLLAPSED DURING TURN TO LINE UP FOR TAKEOFF. PARTS FOUND FAILED AFTER COLLAPSE. ADJUSTING SCREW PN 0841113-3 FOUND SHEARED. BOLT ATTACHING BELLCRANK ASSY TO LANDING GEAR TRUNNION FOUND SHEARED. BOLT PN NAS464P4-26 FOUND SHEARED. MOUNTING LUG
- [SDR EBT2009F00000](https://openairdocs.org/sdr/EBT2009F00000.md): Torque Tube · broken · Mar 30, 2009 · N401GS · Cessna 401A · Rudder Structure
  > DURING RETURN FLIGHT, PILOTS NOTICED SLOPPY RUDDER CONTROL, THEY INVESTIGATED AND FOUND VERY LITTLE RUDDER INPUT FROM LT PEDAL ON BOTH PILOT AND CO-PILOTS SIDE. USING RUDDER TRIM FOUND THEY COULD CONTROL RUDDER. THEY FOUND CLOSEST AIRPORT ENROUTE WITH WINDS
- [SDR CA060112008](https://openairdocs.org/sdr/CA060112008.md): Intercostal · damaged · Dec 15, 2005 · Cessna 401A · Fuselage Main, Attach Fittings
  > CAPTAINS OUTBOARD RUDDER PEDAL MOUNT BLOCK INTERCOSTAL AT STN 118.55, REPAIRED DUE TO CRACKED.
- [SDR TZR2005F00029](https://openairdocs.org/sdr/TZR2005F00029.md): Cylinder · cracked · Jul 12, 2005 · N409TE · Cessna 401A · Reciprocating Engine Cylinder Section
  > CRACKED BETWEEN SPARK PLUG BOSS AND EXHAUST CYLINDER. TYPICAL OF THE CYLINDERS. (K)
- [SDR TZR2005F00028](https://openairdocs.org/sdr/TZR2005F00028.md): Cylinder · cracked · Jul 12, 2005 · N409TE · Cessna 401A · Reciprocating Engine Cylinder Section
  > RT ENGINE NR 5 CYLINDER. LOW COMPRESSION. (K)
- [SDR TZR2005F00026](https://openairdocs.org/sdr/TZR2005F00026.md): Cylinder · cracked · Jun 10, 2005 · N409TE · Cessna 401A · Reciprocating Engine Cylinder Section
  > CRACK IS TYPICAL FOR THESE CYLINDERS, RT ENGINE NR 6 CYLINDER. (SW05200509365) (K)
- [SDR TZR2005F00023](https://openairdocs.org/sdr/TZR2005F00023.md): Cylinder · cracked · Jun 10, 2005 · N409TE · Cessna 401A · Reciprocating Engine Cylinder Section
  > CRACK IS TYPICAL FOR THESE CYLINDERS, RT ENGINE NR 3. (K)
- [SDR TZR2005F00022](https://openairdocs.org/sdr/TZR2005F00022.md): Cylinder · cracked · Jun 10, 2005 · N409TE · Cessna 401A · Reciprocating Engine Cylinder Section
  > CRACK IS TYPICAL FOR THESE CYLINDERS. RT NR 4. (SW05200509363). (K)
- [SDR TZR2005F00021](https://openairdocs.org/sdr/TZR2005F00021.md): Cylinder · cracked · Jun 10, 2005 · N409TE · Cessna 401A · Reciprocating Engine Cylinder Section
  > CRACK IS TYPICAL FOR THESE CYLINDERS, LT NR 3, (SW05200509362). (K)
- [SDR CA050722006](https://openairdocs.org/sdr/CA050722006.md): Rudder Pedal · cracked · May 27, 2005 · Cessna 401A · Wing Miscellaneous Structure
  > PILOT REPORTED THAT RT PARK BRAKE DOES NOT HOLD WHEN SET. UPON MAINTENANCE INSPECTION IT WAS DISCOVERED THAT CAPTAINS OB RUDDER PEDAL INTERCOSTAL MOUNT AT STATION 110.00 WAS CRACKED. IT WAS REPAIRED AS PER CESSNA SRM SECTION 16-38 FIGURE 16-25.
- [SDR TZR2005F00017](https://openairdocs.org/sdr/TZR2005F00017.md): Cylinder · cracked · Apr 11, 2005 · N409TE · Cessna 401A · Reciprocating Engine Cylinder Section
  > CRACKED FROM EXHAUST VALVE TO TOP SPARK PLUG. ECI CYLINDER. (SW05200507950) (K)
- [SDR TZR2005F00016](https://openairdocs.org/sdr/TZR2005F00016.md): Cylinder · cracked · Apr 11, 2005 · N409TE · Cessna 401A · Reciprocating Engine Cylinder Section
  > CRACKED FROM EXHAUST VALVE TO TOP OF SPARK PLUG. ECI CYLINDER. (SW05200507949) (K)
- [SDR TZR2005F00027](https://openairdocs.org/sdr/TZR2005F00027.md): Torque Link · cracked · Mar 4, 2005 · N409TE · Cessna 401A · Main Landing Gear
  > THE LT AND RT MLG HAD CRACKS ON THE BOSS AREA WHERE THE TORQUE LINKS ATTACH. THE CRACKS WERE ABOUT.2500 INCH LONG AND LOCATED NEXT TO WHERE THE BOSS CONNECTS TO THE TUBE. (K)
- [SDR TZR2005F00001](https://openairdocs.org/sdr/TZR2005F00001.md): Attach Fitting · cracked · Mar 4, 2005 · N409TE · Cessna 401A · Main Landing Gear Attach Section
  > THE LT AND RT MAIN LANDING GEAR HAD CRACKS ON THE BOSS AREA WHERE THE TORQUE LINKS ATTACH. THE CRACKS WERE ABOUT.2500 INCH LONG AND LACATED NEXT TO WHERE THE BOSS CONNECTS TO THE TUBE. (SW05200506155) (K)
- [SDR 2002FA0001217](https://openairdocs.org/sdr/2002FA0001217.md): Hub · mismanufactured · Sep 19, 2002 · N6221Q · Cessna 401A · Propeller Hub Section
  > BLADE RETENTION NUT TO HUB LOCK PLUG HOLE DRILLED TO IMPROPER DEPTH. HUB RETIRED FROM SERVICE.
- [SDR 2002FA0001216](https://openairdocs.org/sdr/2002FA0001216.md): Hub · mismanufactured · Sep 19, 2002 · N6221Q · Cessna 401A · Propeller Hub Section
  > BLADE FERRULE ACTUATING PIN HOLE DRILLED IN WRONG LOCATION IAW MM. (MIN. EDGE DISTANCE BETWEEN HOLE 1 INCH) HUB RETIRED FROM SERVICE.
- [SDR 2002FA0001215](https://openairdocs.org/sdr/2002FA0001215.md): Hub · mismanufactured · Sep 19, 2002 · N6221Q · Cessna 401A · Propeller Hub Section
  > BLADE RETENTION NUT TO HUB LOCK PLUG HOLE MACHINED IN WRONG LOCATION AT LAST OVERHAUL OR LAST ASSEMBLY. HUB RETIRED FROM SERVICE.
- [SDR MHJ2002F00001](https://openairdocs.org/sdr/MHJ2002F00001.md): Cylinder · broken · Feb 18, 2002 · N217BA · Cessna 401A · Reciprocating Engine Cylinder Section
  > NR 2 CYLINDER ON LEFT ENGINE HAD A SMALL PIECE MISSING FROM AROUND EXHAUST VALVE AREA. ENGINE HAS BEEN REMOVED FROM SERVICE FOR OVERHAUL.
- [SDR AUS20010504](https://openairdocs.org/sdr/AUS20010504.md): Bracket · cracked · May 8, 2001 · Cessna 401A · Rudder/Tab, Attach Fittings
  > (AUS) RUDDER LOWER HINGE BRACKET CRACKED AT CORNERS.
- [SDR AUS20010498](https://openairdocs.org/sdr/AUS20010498.md): Structure · corroded · May 8, 2001 · Cessna 401A · Empennage Structure
  > (AUS) EXTENSIVE SURFACE CORROSION THROUGHOUT THE FIN AND TAIL ASSEMBLY.
- [SDR 20001218SH017](https://openairdocs.org/sdr/20001218SH017.md): Link · worn · Nov 15, 2000 · N6296Q · Cessna 401A · Landing Gear Retraction/Extension System
  > UPON C/W AD 76-13-07, REPLACEMENT OF FORK BOLTS, PLAY WAS NOTICED AT ADJUSTING SCREW/DOWNLOCK SWITCH LOCK LINK. UPON FURTHER INSPECTION, THREADS WERE SHOWN TO BE WORN AND PART WAS ALLOWED ABOUT 5 THOUSANDS OF AN INCH IN PLAY. THIS IS THE SECOND REPORT FILED
- [SDR 20001018SH028](https://openairdocs.org/sdr/20001018SH028.md): Counterweight · cracked · Sep 25, 2000 · N401PC · Cessna 401A · Propeller Blade Section
  > RELEVANT MAGNETIC PARTICLE INDICATION. (X)
- [SDR 20001018SH027](https://openairdocs.org/sdr/20001018SH027.md): Blade · corroded · Sep 21, 2000 · N401PC · Cessna 401A · Propeller Blade Section
  > PROPELLER BLADE CORRODED. (X)
- [SDR 20001018SH026](https://openairdocs.org/sdr/20001018SH026.md): Blade · corroded · Sep 21, 2000 · N401PC · Cessna 401A · Propeller Blade Section
  > PROPELLER BLADE CORRODED. (X)
- [SDR 20000404SH025](https://openairdocs.org/sdr/20000404SH025.md): Hub · cracked · Feb 7, 2000 · Cessna 401A · Propeller Hub Section
  > PROPELLER HUB CRACKED IN THE BLADE SOCKET AREA.
- [SDR 99ZZZX4605](https://openairdocs.org/sdr/99ZZZX4605.md): Exhaust Pipe · cracked · Dec 6, 1999 · N4057Q · Cessna 401A · Engine Collector/Tailpipe/Nozzle
  > LEFT EXHAUST TAIL PIPE WAS FOUND CRACKED AND A PIECE OF THE PIPE APPROXIMATELY 2 INCHES BY 2.50 INCHES WAS MISSING. IT APPEARED THE CRACKING WAS MOST LIKELY CAUSED BY VIBRATION. EXHAUST GAS LEAKING FROM THIS TAIL PIPE CAN CAUSE DAMAGE TO THE WING SPAR.
- [SDR AU990733](https://openairdocs.org/sdr/AU990733.md): Wire · loose · Jul 26, 1999 · Cessna 401A · Landing Gear System Wiring
  > (AUS) LANDING GEAR MOTOR CONNECTION LOOSE.
- [SDR CA980928016](https://openairdocs.org/sdr/CA980928016.md): Manifold · damaged · Sep 17, 1998 · Cessna 401A · Engine Fuel Distribution
  > (CAN) NR 1 ENGINE RAN ROUGH IN CRUISE. INSPECTION FOUND ONE FUEL INJECTOR WAS PARTIALLY BLOCKED. THE FUEL MANIFOLD WAS DISASSEMBLED AND THE SCREEN WITHIN THE MANIFOLD WAS FOUND DISTORTED. THE FUEL MANIFOLD WAS REPLACED. THE ENGINE WAS GROUND RUN SERVICEABL
- [SDR CA980706004](https://openairdocs.org/sdr/CA980706004.md): Case · fractured · Jun 10, 1998 · Cessna 401A · Reciprocating Engine Power Section
  > (CAN) AFTER TAKEOFF WITH CRUISE POWER SELECTED, THERE WAS SEVERE VIBRATION FROM THE LEFT HAND ENGINE. SMOKE, FLAMES, AND OIL WERE SEEN COMING FROM THE ENGINE COWLING. THE ENGINE WAS SHUT DOWN. POST-FLIGHT INSPECTION FOUND THERE WERE TWO HOLES IN THE UPPER E
- [SDR 98ZZZX115](https://openairdocs.org/sdr/98ZZZX115.md): Lifter · galled · Oct 14, 1997 · N401GS · Cessna 401A · Reciprocating Engine Power Section
  > LIFTER/CAMSHAFT GALLED. LIFTER BODY CHIP FOUND IN OIL FILTER. PRESSURE RELIEF VALVE CAUSING LOW OIL PRESSURE. ENGINE TORN DOWN, NEW PARTS INSTALLED.
- [SDR 98ZZZX114](https://openairdocs.org/sdr/98ZZZX114.md): Camshaft · galled · Oct 14, 1997 · N401GS · Cessna 401A · Reciprocating Engine Power Section
  > LIFTER/CAMSHAFT GALLED. LIFTER BODY CHIP FOUND IN OIL FILTER. PRESSURE RELIEF VALVE CAUSING LOW OIL PRESSURE. ENGINE TORN DOWN, NEW PARTS INSTALLED.
- [SDR 97ZZZX2920](https://openairdocs.org/sdr/97ZZZX2920.md): Alternator · lug cracked · Jun 12, 1997 · N711SN · Cessna 401A · DC Generator-Alternator
  > ALTERNATOR MOUNT LUG FOUND CRACKED, AND OIL LEAKING AT GASKET. ALTERNATOR HAS ONLY 197 HRS SINCE OVERHAUL. ON DISASSEMBLY, ONE LUG FOUND CRACKED AND ONE LUG FELL OFF COMPLETELY.
- [SDR 97ZZZX1952](https://openairdocs.org/sdr/97ZZZX1952.md): Torque Tube · failed · Apr 16, 1997 · N671AW · Cessna 401A · Rudder Control System
  > RUDDER SYSTEM CEASED TO OPERATE. FOUND LEFT RUDDER TORQUE TUBE ASSY ARM BROKEN FREE OF TORQUE TUBE. THIS ARM IS CONNECTED TO RUDDER CABLE. REPLACED TORQUE TUBE WITH NEW PART.
- [SDR 97ZZZX2081](https://openairdocs.org/sdr/97ZZZX2081.md): Torque Tube · broken · Apr 8, 1997 · N671AW · Cessna 401A · Rudder Control System
  > PILOT EXPERIENCED LANDING DIFFICULTIES. UPON INSPECTION OF FLIGHT CONTROLS, TECHNICIAN DISCOVERED RUDDER CABLE ATTACH FITTING BROKEN OFF OF THE LT CONTROL TORQUE TUBE ASSY. MAGNAFLUX INSPECTION OF THE RT TORQUE TUBE ASSY REVEALED IT CRACKED AT THE EDGE OF TH
- [SDR AU961096](https://openairdocs.org/sdr/AU961096.md): Bearing · loose · Jul 25, 1996 · Cessna 401A · DC Generator-Alternator
  > (AUS) RH ENGINE DRIVEN ALTERNATOR SLIP RING END BEARING LOOSE IN END HOUSING - BEARING HOUSING SUPPORT WEBS CRACKED AND BROKEN
- [SDR CA970421093](https://openairdocs.org/sdr/CA970421093.md): Control Cable · separated · Jun 19, 1996 · Cessna 401A · Trailing Edge Flap Control System
  > (CAN) THE AREA WHERE THIS FAILURE OCCURRED IS LOCATED BEHIND A PULLEY AND IS NOT EASILY INSPECTED WITHOUT THE USE OF A MIRROR LOOKING INBOARD. SOME WEAR AND FRAYING WAS ALSO NOTICED JUST OUTBOARD OF THE PULLEY. THERE WAS SOME CORROSION ON THE CABLE BUT NOT IN
- [SDR CA960826062](https://openairdocs.org/sdr/CA960826062.md): Control Cable · separated · Jun 19, 1996 · Cessna 401A · Trailing Edge Flap Control System
  > (CAN) THE AREA WHERE THIS FAILURE OCCURRED IS LOCATED BEHIND A PULLEY AND IS NOT EASILY INSPECTED WITHOUT THE USE OF A MIRROR LOOKING INBOARD. SOME WEAR AND FRAYING WAS ALSO NOTICED JUST OUTBOARD OF THE PULLEY. THERE WAS SOME CORROSION ON THE CABLE BUT NOT IN
- [SDR AU960556](https://openairdocs.org/sdr/AU960556.md): Diode · faulty · Apr 23, 1996 · Cessna 401A · DC Generator-Alternator
  > (AUS) LH ALTERNATOR DIODES LOOSE AND BROKEN
- [SDR AU960302](https://openairdocs.org/sdr/AU960302.md): Switch · broken wire · Feb 11, 1996 · Cessna 401A · Trailing Edge Flap Control System
  > (AUS) FLAP SELECTOR DOWN MICROSWITCH WIRE BROKEN
- [SDR EY2R9601405](https://openairdocs.org/sdr/EY2R9601405.md): Retain Bearing · fretted · Feb 1, 1996 · Cessna 401A · Propeller Assembly
  > PROP ASSY RETAIN BEARING RACES FRETTED
- [SDR EY2R9601404](https://openairdocs.org/sdr/EY2R9601404.md): Ball Bearing · fretted · Feb 1, 1996 · Cessna 401A · Propeller Assembly
  > PROP ASSY BALLS FRETTED
- [SDR 96ZZZX722](https://openairdocs.org/sdr/96ZZZX722.md): Shaft · sheared · Jan 19, 1996 · N7816Q · Cessna 401A · Reciprocating Engine Rear Section
  > INSTALLED REBUILT STARTER/ADAPTER AFTER PREVIOUS ONE FAILED AFTER 26 HOURS OF USE. THIS CURRENT ONE, SN 77371, FAILED AFTER 2.5 HOURS AND SIX STARTS DUE TO THE SAME PROBLEM - SHEARED GEAR.
- [SDR CA951228003](https://openairdocs.org/sdr/CA951228003.md): Bearing · failed · Dec 11, 1995 · Cessna 401A · Reciprocating Engine Power Section
  > (CAN)DURING FLIGHT THE OIL PRESSURE ON THE #2 ENGINE BEGAN TO DROP SO THE ENGINE WAS SHUTDOWN. POST FLIGHT INSPECTION OF THE ENGINE REVEALED THE OIL BREATHER LINE HAD FROZEN AND CREATED A PRESSURE BUILD THAT CAUSED ONE OF THE PUSH RODS SEAL TO BLOW OUT RESULT
- [SDR 95ZZZX5209](https://openairdocs.org/sdr/95ZZZX5209.md): Transfer Pump · leaking · Sep 15, 1995 · N401WD · Cessna 401A · Aircraft Fuel Distribution System
  > AIRCRAFT LANDED AND DURING TAXI OUT, PILOT NOTICED GLOW NEAR RT NACELLE AREA. TOWER REPORTED SUSPECT FIRE. PILOT SHUT DOWN, EXITED AIRCRAFT. FIRE WAS EXTERNAL UNDER WING. FIRE EXTINGUISHED ON ITS OWN. NO DAMAGE TO AIRCRAFT FOUND ON FOLLOW-UP INSPECTION.

## 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 = '401A'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/cessna-401a/reports

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