# Service difficulty reports: Cessna 401

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

Newest first. General aviation reporting is voluntary.

Page 1 of 2 · 93 reports

- [SDR 2025FA0000406](https://openairdocs.org/sdr/2025FA0000406.md): Bellcrank · cracked · May 22, 2025 · N3239Q · Cessna 401 · Landing Gear Retraction/Extension System
  > CONDUCTED A GEAR UP LANDING AT KGKY. PILOT STATED THAT THEY WERE CONDUCTING A MX FLT AFTER ACFT HAD NOT FLOWN IN OVER 20 YEARS. HAD PERFORMED MULTIPLE HIGH SPEED TAXIS WITH SUBSEQUENT ADJUSTMENTS MADE. DEPARTED & CONDUCTED AN INITIAL PATTERN WITH GEAR DOWN W
- [SDR XGNA2020102600008](https://openairdocs.org/sdr/XGNA2020102600008.md): Indication Sys · malfunctioned · Oct 26, 2020 · N31DB · Cessna 401 · Fuel Indicating System
  > ON TAKE OFF CLIMB OUT AT EDC THE PILOT OF FLIGHT GTX336 THOUGHT HE OBSERVED ERRONEOUS FUEL FLOW INDICATIONS ON THE RIGHT FUEL FLOW GAUGE. HE DID NOT DECLARE AN EMERGENCY, BUT REQUESTED RTB AS A PRECAUTION. HE STATED BOTH ENGINES WERE RUNNING. ONCE ON THE GR
- [SDR CA140625006](https://openairdocs.org/sdr/CA140625006.md): Fitting · cracked · Jun 25, 2014 · Cessna 401 · Elevator Structure
  > (CAN) WHEN COMPLETING THE SID INSPECTION PROGRAM THE LT ELEVATOR WAS REMOVED FOR INSPECTION. A TAPER PIN, PASSES THROUGH A FITTING. THE FITTING WAS FOUND CRACKED AT THE TAPER PIN HOLE.
- [SDR XGN2012F00001](https://openairdocs.org/sdr/XGN2012F00001.md): Engine · damaged · Jun 18, 2012 · N31DB · Cessna 401 · Engine (Reciprocating)
  > PILOT REPORTED LOSING OIL PRESSURE ON THE LEFT ENGINE IN CRUISE FLIGHT. THE ENGINE WAS SHUT DOWN IN FLIGHT TO PREVENT DAMAGE. REMOVAL OF THE OIL FILTER AND ITS INSPECTION SHOWED METAL CONTAMINATION IN THE FILTER. THE ENGINE WAS REMOVED FROM SERVICE.
- [SDR CA120524012](https://openairdocs.org/sdr/CA120524012.md): Cotter Pin · missing · May 23, 2012 · Cessna 401 · AC Inverter
  > (CAN) IN LEVEL CRUISE FLGHT THE LT ALTERNATOR STOPPED PRODUCING POWER. AFTER LANDING OIL WAS DISCOVERED UNDER THE LT ENGINE. THE ALTERNATOR WAS REMOVED. THE ALTERNATOR ARMATURE WAS FOUND BROKEN OFF. THE COTTER PIN HOLDING THE DRIVE GEAR NUT WAS FOUND MISSIN
- [SDR XGN2011F00000](https://openairdocs.org/sdr/XGN2011F00000.md): Spring · broken · Dec 30, 2010 · N31DB · Cessna 401 · Landing Gear Position and Warning
  > LANDING GEAR WOULD NOT RETRACT. FOUND SAFETY SWITCH SPRING BROKEN AND LEVER ACTUATOR TEETH WORN OUT.
- [SDR 2010FA0001182](https://openairdocs.org/sdr/2010FA0001182.md): Support · detached · Nov 5, 2010 · N37WC · Cessna 401 · Main Landing Gear Attach Section
  > 2 OF THE 3 BOLTS ATTACHING THE UPPER HALF OF THE LT MLG SIDE BRACE SUPPORT BRACKET WERE FOUND MISSING. THE STRESS IMPOSED ON THE REMAINING BOLT CAUSED IT TO BE PULLED THROUGH THE ATTACHING STRUCTURE. THE FAILURE OF THIS ATTACHMENT CAUSED THE GEAR TO NOT ACQU
- [SDR CA101021004](https://openairdocs.org/sdr/CA101021004.md): Fitting · cracked · Oct 21, 2010 · Cessna 401 · Elevator Structure
  > RT ELEVATOR END FITTING CRACKED AT TAPER PIN HOLE. FOUND DURING INSP.
- [SDR CA080930006](https://openairdocs.org/sdr/CA080930006.md): Wheel · cracked · Jul 23, 2008 · Cessna 401 · Wheel/Ski/Float
  > (CAN) RT MAIN WHEEL ASSY BEAD AREA FOUND CRACKED. WHEEL REPLACED WITH SERVICEABLE UNIT.
- [SDR YJV2009F00000](https://openairdocs.org/sdr/YJV2009F00000.md): Connecting Rod · broken · Jun 27, 2008 · N8438F · Cessna 401 · Reciprocating Engine Power Section
  > ENGINE VIBRATING, HIGH OIL TEMP AND LOW OIL PRESSURE. POST FLIGHT FOUND NR 2 CONNECTING ROD BROKEN. (K)
- [SDR CA080314013](https://openairdocs.org/sdr/CA080314013.md): Engine · making metal · Mar 7, 2008 · Cessna 401 · Engine (Reciprocating)
  > (CAN) ON FINAL APPROACH INTO AIRPORT THE RT ENGINE MANIFOLD PRESSURE STARTED CHANGING. THE PILOT THEN NOTICED THAT THE RT OIL PRESSURE HAD DROPPED TO THE RED LINE. THE RT PROP WAS FEATHERED AND THE ENGINE WAS SHUTDOWN. SMALL BITS OF METAL WERE FOUND UNDER THE
- [SDR CA070126011](https://openairdocs.org/sdr/CA070126011.md): Torque Link · failed · Jan 18, 2007 · Cessna 401 · Main Landing Gear Strut/Axle/Truck
  > (CAN) AIRCRAFT WAS DOING TOUCH AND GO`S ON THE 2ND LANDING PILOT REPORTED ABNORMAL LANDING AND NO GEAR UP INDICATION. GEAR CYCLED AND ONLY 2 OUT OF 3 INDICATOR LIGHTS ILUMINATED. RT MAIN, NO INDICATION. GEAR CYCLED AGAIN NO UP INDICATION AND NO RT GREEN DOWN
- [SDR CA070115015](https://openairdocs.org/sdr/CA070115015.md): Mount · loose · Jan 12, 2007 · Cessna 401 · Fuselage Main, Attach Fittings
  > (CAN) DURING SCHEDULED LANDING GEAR ROUTINE INSPECTION, LANDING GEAR ACTUATOR GEARBOX MOUNTING BOLTS (3) FOUND MISSING AND REMAINING (1) BOLT FOUND SHEARED. EMERGENCY GEAR OPERATION ATTEMPTED TO RELOCATE GEAR. EMERGENCY OPERATION INHIBITED DUE TO IMPROPER GEA
- [SDR CA061023005](https://openairdocs.org/sdr/CA061023005.md): Case · cracked · Oct 12, 2006 · Cessna 401 · Reciprocating Engine Power Section
  > (CAN) THE ENGINE HAD A SMALL OIL LEAK. AFTER REMOVING THE DIP STICK ASSEMBLY, A CRACK WAS FOUND BETWEEN NR 2 AND NR 4 CYLINDERS. THE ENGINE WAS REMOVED FOR OVERHAUL. (TC NR 20061023005)
- [SDR XGN2006F00014](https://openairdocs.org/sdr/XGN2006F00014.md): Cylinder · cracked · May 23, 2006 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00013](https://openairdocs.org/sdr/XGN2006F00013.md): Cylinder · cracked · May 23, 2006 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEAD CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00025](https://openairdocs.org/sdr/XGN2006F00025.md): Cylinder · cracked · May 20, 2006 · N3260Q · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00024](https://openairdocs.org/sdr/XGN2006F00024.md): Cylinder · cracked · Apr 16, 2006 · N3260Q · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00015](https://openairdocs.org/sdr/XGN2006F00015.md): Cylinder · cracked · Mar 30, 2006 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00023](https://openairdocs.org/sdr/XGN2006F00023.md): Cylinder · cracked · Mar 16, 2006 · N3260Q · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDR HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00022](https://openairdocs.org/sdr/XGN2006F00022.md): Cylinder · cracked · Dec 16, 2005 · N3260Q · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2005F00007](https://openairdocs.org/sdr/XGN2005F00007.md): Cylinder · cracked · Jun 14, 2005 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > THIS CYLINDER WAS IN THE NR 6 POSITION AND IS A TYPE (A) HEAD. THIS CRACKED CYLINDER HEAD WAS FOUND AT THE 50 HOUR INSPECTION. WE ARE FINDING SIGNS OF AIR LEAKAGE ON THE EXHAUST SIDE OF THE CYLINDER HEAD WHEN DOING A COMPRESSION CHECK. WE ARE SPRAYING SOAPY
- [SDR TZR2005F00025](https://openairdocs.org/sdr/TZR2005F00025.md): Cylinder · cracked · Jun 10, 2005 · N405TE · Cessna 401 · Reciprocating Engine Cylinder Section
  > CRACK IS TYPICAL FOR THESE CYLINDERS. RT ENGINE, NR 3 CYL. (SW05200509364) (K)
- [SDR XGN2006F00021](https://openairdocs.org/sdr/XGN2006F00021.md): Cylinder · cracked · May 24, 2005 · N3260Q · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00020](https://openairdocs.org/sdr/XGN2006F00020.md): Cylinder · cracked · May 23, 2005 · N3217Q · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00019](https://openairdocs.org/sdr/XGN2006F00019.md): Cylinder · cracked · May 20, 2005 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00062](https://openairdocs.org/sdr/XGN2006F00062.md): Cylinder · cracked · May 6, 2005 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00061](https://openairdocs.org/sdr/XGN2006F00061.md): Cylinder · cracked · May 6, 2005 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00018](https://openairdocs.org/sdr/XGN2006F00018.md): Cylinder · cracked · May 6, 2005 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00017](https://openairdocs.org/sdr/XGN2006F00017.md): Cylinder · cracked · May 6, 2005 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00059](https://openairdocs.org/sdr/XGN2006F00059.md): Cylinder · cracked · Apr 16, 2005 · N3260Q · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR TZR2005F00019](https://openairdocs.org/sdr/TZR2005F00019.md): Cylinder · cracked · Apr 15, 2005 · N403TE · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER CRACKED FROM EXHAUST VALVE TO TOP SPARK PLUG PORT. ECI CYLINDER. (SW05200507952) (K)
- [SDR TZR2005F00018](https://openairdocs.org/sdr/TZR2005F00018.md): Cylinder · cracked · Apr 5, 2005 · N405TE · Cessna 401 · Reciprocating Engine Cylinder Section
  > CRACKED FROM INJECTOR TOWARD SPARK PLUG, ECI CYLINDER. (SW05200507951) (K)
- [SDR XGN2006F00060](https://openairdocs.org/sdr/XGN2006F00060.md): Cylinder · cracked · Apr 3, 2005 · N3260Q · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00066](https://openairdocs.org/sdr/XGN2006F00066.md): Cylinder · cracked · Mar 30, 2005 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00065](https://openairdocs.org/sdr/XGN2006F00065.md): Cylinder · cracked · Mar 30, 2005 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00016](https://openairdocs.org/sdr/XGN2006F00016.md): Cylinder · cracked · Mar 30, 2005 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR TZR2005F00005](https://openairdocs.org/sdr/TZR2005F00005.md): Cylinder · cracked · Mar 21, 2005 · N405TE · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER CRACK FROM EXHAUST VALVE. (K)
- [SDR TZR2005F00004](https://openairdocs.org/sdr/TZR2005F00004.md): Cylinder · cracked · Mar 21, 2005 · N405TE · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER CRACKED FROM EXHAUST VALVE TO TOP SPARK PLUG HOLE. (K)
- [SDR XGN2006F00064](https://openairdocs.org/sdr/XGN2006F00064.md): Cylinder · cracked · Mar 3, 2005 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR XGN2006F00063](https://openairdocs.org/sdr/XGN2006F00063.md): Cylinder · cracked · Mar 3, 2005 · N31DB · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER HEADS CRACKED IN THE EXHAUST PORT AREA. (K)
- [SDR TZR2005F00009](https://openairdocs.org/sdr/TZR2005F00009.md): Cylinder · cracked · Feb 22, 2005 · N405TE · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER CRACKED VALVE TO VALVE. (K)
- [SDR TZR2005F00006](https://openairdocs.org/sdr/TZR2005F00006.md): Cylinder Head · cracked · Jan 29, 2005 · N405TE · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER CRACKED AT HEAD. (K)
- [SDR TZR2005F00007](https://openairdocs.org/sdr/TZR2005F00007.md): Cylinder · cracked · Jan 14, 2005 · N405TE · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER CRACKED FROM EXHAUST VALVE. (K)
- [SDR TZR2005F00008](https://openairdocs.org/sdr/TZR2005F00008.md): Cylinder · cracked · Jan 12, 2005 · N405TE · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER CRACKED AT SPARK PLUG HOLE. (K)
- [SDR TZR2005F00013](https://openairdocs.org/sdr/TZR2005F00013.md): Cylinder · damaged · Jan 10, 2005 · N403TE · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER COMPRESSION BELOW MINIMUMS. (K)
- [SDR TZR2005F00003](https://openairdocs.org/sdr/TZR2005F00003.md): Cylinder · cracked · Jan 3, 2005 · N401TE · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER CRACK FROM EXHAUST VALVE TO SPARK PLUG. (K)
- [SDR TZR2005F00002](https://openairdocs.org/sdr/TZR2005F00002.md): Cylinder · cracked · Jan 3, 2005 · N401TE · Cessna 401 · Reciprocating Engine Cylinder Section
  > CYLINDER CRACKED FROM EXHAUST VALVE TO SPARK PLUG HOLE. (K)
- [SDR TZR2004F00005](https://openairdocs.org/sdr/TZR2004F00005.md): Turbocharger · failed · Mar 10, 2004 · N403TE · Cessna 401 · Exhaust Turbocharger
  > PILOT REPORTED LOSS OF TURBO BOOST AND OIL PRESSURE, SHUT DOWN ENGINE AND FEATHERED PROPELLER IN FLIGHT. LANDED AIRCRAFT WITHOUT FURTHER INCIDENT. DURING POST FLIGHT INSPECTION OF TURBO OIL WAS OBSERVED IN THE EXHAUST OVERBOARD PIPE INDICATING SEAL FAILURE.
- [SDR TZR2004F00000](https://openairdocs.org/sdr/TZR2004F00000.md): Bearing · failed · Dec 23, 2003 · N408TE · Cessna 401 · Exhaust Turbocharger
  > AFTER INSTALLATION OF RT ENGINE, WHILE PERFORMING ENGINE FUEL SET-UP AND ADJUSTMENT OF MANIFOLD PRESSURE, THERE WAS A DECREASE IN MANIFOLD PRESSURE AND A NOTICEABLE NOISE AND VIBRATION FROM THE RT ENGINE. UPON FURTHER INVESTIGATION IT WAS NOTED THAT THE TURBO

Next page: https://openairdocs.org/model/cessna-401/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 = '401'
ORDER BY difficulty_date DESC
```

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

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