# Service difficulty reports: Cessna 421B

A list on [Cessna 421B](https://openairdocs.org/model/cessna-421b.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 5 · 210 reports

- [SDR 2022FA0000351](https://openairdocs.org/sdr/2022FA0000351.md): Magneto · defective · Jul 14, 2022 · N678DB · Cessna 421B · Magneto/Distributor
  > LOSS OF 5 INCHES OF MP AT FL 240 AND INFLIGHT INVESTIGATION SHOWED A ROUGH RUNNING RH MAGNETO. DISCOVERY OF A DEFECTIVE SPARK PLUG LEAD (SEE OTHER SDR) ON A 25 HR TTSN CHAMPION SPARK PLUG HARNESS LED WITH 25 HRS TTSN SPARK CHAMPION RHB32E SPARK PLUGS LED US
- [SDR 2022FA0000319](https://openairdocs.org/sdr/2022FA0000319.md): None · failed · Jun 24, 2022 · N678D · Cessna 421B · Ignition Harness (Distribution)
  > CRUISE FLIGHT FL 240, 25 HRS SINCE NEW CHAMPION IGNITION HARNESS, BLUE LABEL TCM/CAT BENDIX S6LN-1205 MAGNETO, AND CHAMPION RHB32E SPARK PLUGS AT ENGINE OVERHAUL (25 HRS TTSMOH OF ENGINE). IN CRUISE FLIGHT LOST 5 INCHES OF MP PRESSURE ON NEWLY OVERHAULED RH
- [SDR 2020FA0000406](https://openairdocs.org/sdr/2020FA0000406.md): Skin · cracked · Sep 16, 2020 · N780JC · Cessna 421B · Wing, Plate/Skin
  > A CRACK ON THE SKIN AT THE RIGHT WING REAR SPAR AND TRAILING EDGE. THE LOCATION IS AT THE MAIN FUEL TANK REAR SPAR ATTACH POINT. THE CRACK IS CAUSED BY VIBRATION OR LOOSE REAR MAIN FUEL TANK ATTACH BOLT. RECOMMENDED AT EACH ANNUAL INSPECTION, INSPECT THE AR
- [SDR 2019FA0000402](https://openairdocs.org/sdr/2019FA0000402.md): Hinge · corroded · Dec 10, 2019 · N5448J · Cessna 421B · Fuselage, Door Hinge
  > PERFORMED REPAIR WORK ON THE AIRCRAFT FOR LOW CABIN DIFFERENTIAL/PRESSURIZATION. FOUND MANY LEAKS AND REPAIRED. DIFFERENTIAL WAS REPAIRED TO BOOK VALUES. CUSTOMER TOOK POSSESSION OF THE AIRCRAFT AND AFTER SEVERAL FLIGHT HOURS HEARD A POP AND LOST SOME PRESSURI
- [SDR CA180925012](https://openairdocs.org/sdr/CA180925012.md): Support · loose · Sep 22, 2018 · Cessna 421B · Reciprocating Engine Rear Section
  > (CAN) AIRCRAFT SUFFERED AN UNCOMMANDED RIGHT ENGINE SHUT DOWN APPROXIMATELY 10 MINUTES INTO THE FLIGHT, PILOT EXECUTED AND ENGINE OUT SHUT DOWN AND FEATHERED THE PROPELLER, THEN DIVERTED. ON OPENING THE RIGHT ENGINE COWLS THE FOLLOWING WAS FOUND: THE TWO RETA
- [SDR 2017FA0000635](https://openairdocs.org/sdr/2017FA0000635.md): Magneto · faulty · Nov 15, 2017 · N4AD · Cessna 421B · Magneto/Distributor
  > HAD ONE ROUGH MAG CHECK AND 2 GOOD MAG CHECKS PRIOR TO FLIGHT. REDUCED POWER IN CLIMB AND MAG CHECK REVEALED NO SPARK ON LT MAGNETO. RETURNED TO AIRPORT. REMOVED IGNITION HARNESS FROM MAG AND NOTICED LOTS OF METAL FLAKES UNDER THE COVER OF THE MAG. THIS ENG
- [SDR YN8R2017032400001](https://openairdocs.org/sdr/YN8R2017032400001.md): Pivot · broken · Mar 24, 2017 · N104WM · Cessna 421B · Flight Compartment Equipment
  > FOUND PILOTS SEAT LT PIVOT ARM BROKEN. REPLACED PIVOT ARM IAW SERVICE MANUAL (REV 15) SECTION 3.
- [SDR YN8R201606300001](https://openairdocs.org/sdr/YN8R201606300001.md): Piston · cracked · Jun 30, 2016 · N50DL · Cessna 421B · Reciprocating Engine Cylinder Section
  > WHEN OIL FILTER WAS SECTIONED FOR CHECK FOR CONTAMINATION, LARGE CHIPS OF ALUMINUM WERE NOTED. SENT OIL FILTER TO AVIATION OIL ANALYSIS LABS AND CONTACTED ENGINE MFG FOR GUIDANCE. REMOVED AND INSPECTED OIL PUMP, NO DEFECTS FOUND. REMOVED VALVE TRAIN AND BOR
- [SDR YN8R201511090001](https://openairdocs.org/sdr/YN8R201511090001.md): Torque Tube · corroded · Nov 9, 2015 · N44KF · Cessna 421B · Rudder Control System
  > WHILE REPAIRING RUDDER DUE TO WIND DAMAGE, FOUND RUDDER TORQUE TUBE, PN 5133011-9 TO BE BADLY CORRODED. REPLACED WITH NEW.
- [SDR 2014FA0000721](https://openairdocs.org/sdr/2014FA0000721.md): Screw · sheared · Dec 25, 2014 · N21WT · Cessna 421B · Reciprocating Engine Cylinder Section
  > RPM AND MANIFOLD PRESSURE STARTED FLUCTUATING FOR THE RT ENGINE. WHITE SMOKE FROM TURBO CHARGER VENTS WAS NOTED AS WELL AS OIL STREAKS NOTED. OIL PRESSURE DROPPED TO BOTTOM OF GREEN ARC ON THE OIL PRESSURE GAGE. EMERGENCY PROCEDURE CHECKLIST CALLED FOR ENGI
- [SDR 2014F00153](https://openairdocs.org/sdr/2014F00153.md): Connector · unsecure · Sep 16, 2014 · N522BA · Cessna 421B · Instrument System Wiring
  > LOST PANEL LIGHTS AND INDICATIONS DURING LANDING. TROUBLESHOT SYSTEM AND FOUND THAT A CONNECTOR PLUG CONTAINING THE POWER AND GROUND LEADS HAD COME LOOSE. TIGHTEN AND SECURED CONNECTOR PLUG OPS CHECK SYSTEM WITH NO DEFECTS FOUND AT THIS TIME.
- [SDR 2014F00141](https://openairdocs.org/sdr/2014F00141.md): Adapter · failed · Jul 31, 2014 · Cessna 421B · Engine Cranking
  > DURING INSPECTION, AFTER ENGINE INFLIGHT SHUTDOWN FOUND THE RT ENGING STARTER ADAPTER GEAR SPLINES WERE DAMAGED CAUSING FURTHER DAMAGE TO THE CRANK SHAFT DRIVE GEAR AND THE CAM SHAFT DRIVE GEAR. THE CRANK SHAFT DRIVE GEAR ALSO DRIVES THE CAM SHAFT AS WELL AS
- [SDR 2012FA0000596](https://openairdocs.org/sdr/2012FA0000596.md): Clamp · cracked · Aug 24, 2012 · N678DB · Cessna 421B · Exhaust Turbocharger
  > TURBOCHARGER TURBINE TO TAILPIPE V BAND CLAMP, FOUND TO HAVE A 3" LONG CRACK ALONG THE OUTER PERIMETER OF THE V BAND. CRACK SEPARATION WAS LESS THAN.0625" AT THE WIDEST POINT. THIS IS NOT A MULTI-SEGMENT V BAND. NO EXHAUST LEAK EVIDENT. DISCOVERED DURING
- [SDR CA120417008](https://openairdocs.org/sdr/CA120417008.md): Actuator · malfunctioned · Apr 17, 2012 · Cessna 421B · Rudder Tab Control System
  > (CAN) DURING ASSY OF THE RUDDER TRIM ACTUATOR IT WAS NOTED THAT THE AFT BEARING SURFACE ON THE EXTERNAL SCREW, PN: 5815023-7 FROM THE REPAIR KIT, PN: 5115275-201 IS TOO SHORT. THE ACTUATOR WAS HAS NOT BEEN ASSEMBLED AS OF YET, SO THE CLEARANCE SPECIFIED IN TH
- [SDR CA120207001](https://openairdocs.org/sdr/CA120207001.md): Bellcrank · broken · Jan 29, 2012 · Cessna 421B · Landing Gear Door Retract Section
  > (CAN) AFTER LANDING, PARKING AND SHUTDOWN THE PILOT NOTICED THE RT LANDING GEAR INBD DOOR HANGING OPEN. MAINTENANCE DISCOVERED THE INBD WHEEL WELL BELLCRANK CASTING ARM FOR THE INBD GEAR DOOR OPERATION HAD SNAPPED OFF. UPON CLOSER EXAMINATION IT COULD BE SEE
- [SDR YWYR201209158826](https://openairdocs.org/sdr/YWYR201209158826.md): Spark Plug · cracked · Nov 8, 2011 · N1946G · Cessna 421B · Spark Plug/Igniter
  > PILOT REPORTED HIGH RPM DROP DURING MAGNETO DROP OFF CHECK. ISOLATED PROBLEM TO NR 5 CYLINDER BY USE OF GRAPHIC ENGINE MONITOR. REMOVED ALL SPARK PLUGS AND FOUND 1 SPARK PLUG ON NR 5 CYLINDER HAD CRACKED INSULATOR TIP. INSTALLED NEW SPARK PLUG. GROUND RUN
- [SDR EG6R2011101800769](https://openairdocs.org/sdr/EG6R2011101800769.md): Tube · failed · Oct 18, 2011 · N5929M · Cessna 421B · Tire Tube
  > NOSE TIRE BLEW UPON LANDING. UPON DISASSEMBLING TIRE AND WHEEL ASSY, FOUND APPROX 2 INCH HOLE IN TUBE. PROBABLE CAUSE UNKNOWN.
- [SDR 2011FA0000582](https://openairdocs.org/sdr/2011FA0000582.md): Gear · sheared · Aug 12, 2011 · N71544 · Cessna 421B · DC Generator-Alternator
  > PILOT REPORTED IN FLIGHT LOSS OF ALTERNATOR. ACFT LANDED W/O INCIDENT. INVESTIGATION REVEALED ALTERNATOR DRIVE CLUTCH GEAR. MISSING DAMPNER MATERIAL AND ALTERNATOR SHAFT BROKEN AT END OF ARMATURE. CUT OIL FILTER OPEN, FOUND TO BE FULL OF STEEL FILINGS. AL
- [SDR Z8G2011F00000](https://openairdocs.org/sdr/Z8G2011F00000.md): Thrust Bearing · mismanufactured · Jul 28, 2011 · N960EM · Cessna 421B · Exhaust Turbocharger
  > PILOT REPORTED EXCESSIVE LOSS OF OIL AND LOW OIL PRESSURE ON RT ENGINE. DISASSEMBLY OF TURBOCHARGER REVEALED THE 3 GROOVES ON THE INBD THRUST BRG WERE MACHINED INCORRECTLY. THEY ARE TOO LARGE TO THE EDGE OF BEARING ALLOWING OIL TO BYPASS. BEARING PIN 40726
- [SDR CA110203004](https://openairdocs.org/sdr/CA110203004.md): Burner Can · cracked · Jan 28, 2011 · Cessna 421B · Heating System
  > (CAN) BURNER CAN CRACKS IN SOUTHWIND COMBUSTION HEATER WITH ONLY 170 HRS SINCE OVERHAUL BY AIRCRAFT HEATING AND ELECTRICAL INC. THIS CAUSED EXHAUST FUMES IN AIRCRAFT CABIN. COMPLETED PRESSURE DECAY TEST ON HEATER WITH FAILED RESULTS. REMOVED HEATER FORM AIRCRA
- [SDR 2010FA0001149](https://openairdocs.org/sdr/2010FA0001149.md): Boss · cracked · Nov 1, 2010 · N1958G · Cessna 421B · Reciprocating Engine Power Section
  > DURING VISUAL INSP OF THE ENGINE DISCOVERED INTERCOOLER AFT MOUNTING BOSS TO BE CRACKED 3/4 OF THE WAY AROUND.
- [SDR 2010FA0001147](https://openairdocs.org/sdr/2010FA0001147.md): Shaft · cracked · Sep 16, 2010 · N421DP · Cessna 421B · Propeller Assembly
  > PILOT HAD A ROUGH RUNNING ENGINE AND DIFFICULTY CONTROLLING THE ENGINE RPM'S. PILOT SHUTDOWN AND FEATHERED THE RT ENGINE AND LANDED SAFELY. MX PERFORM REPAIR ON PROPELLER CONTROL CABLE AND PROCEEDED TO PERFORM ENGINE RUN. HOWEVER, THE ENGINE WOULD NOT DEVEL
- [SDR 2010FA0000439](https://openairdocs.org/sdr/2010FA0000439.md): Gearbox · worn · Apr 30, 2010 · N421PD · Cessna 421B · Landing Gear Actuator
  > AFTER TAKEOFF GEAR DID NOT FULLY RETRACT. THE RED GEAR IN-TRANSIT LIGHT REMAINED ILLUMINATED. EMERGENCY GEAR EXTENSION WAS PERFORMED AND GOT (3) GREEN INDICATION. RETURNED TO AIRPORT AND PLACED ACFT ON JACKS. RETRACT CHECK PERFORMED AND AFTER GEAR UNLOCKED
- [SDR 2010FA0000426](https://openairdocs.org/sdr/2010FA0000426.md): Control Cable · loose · Apr 23, 2010 · N22FX · Cessna 421B · Rudder Control System
  > THE CONTROL CABLE FOR THE RUDDER WAS UNDER TENSIONED AND THE FAIR LEAD MISSING AT FUSELAGE STA 289.94 CAUSING THE CONTROL CABLE TO SAW INTO THE BULKHEAD.1250" DEEP. THE CABLE TENSION AND CONDITION OF THE RUDDER CONTROL SYS WAS NOT CLOSELY INSPECTED DURING 10
- [SDR 2010FA0000274](https://openairdocs.org/sdr/2010FA0000274.md): Clamp · cracked · Mar 9, 2010 · N1944G · Cessna 421B · Exhaust Turbocharger
  > DURING AN ANNUAL INSP, THE CLAMP BETWEEN THE TURBO AND EXHAUST OVERBOARD ON THE LT ENGINE WAS FOUND WITH A 4.5 IN CRACK ALONG THE CIRCUMFERENCE.
- [SDR 2009FA0000845](https://openairdocs.org/sdr/2009FA0000845.md): Cylinder · cracked · Oct 6, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder Section
  > REPAIRED CYLINDER FOUND TO BE CRACKED SPARK PLUG TO INJECTOR.
- [SDR 2009FA0000844](https://openairdocs.org/sdr/2009FA0000844.md): Cylinder · cracked · Sep 19, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder Section
  > REPAIRED CYLINDER FOUND TO BE CRACKED SAME PLACE AS OTHERS, SPARK PLUG TO INJECTOR.
- [SDR XTTA09030918](https://openairdocs.org/sdr/XTTA09030918.md): Autopilot Sys · shorted · Sep 3, 2009 · N21WT · Cessna 421B · Altitude Controller
  > ON APPROACH, A FEW WISPS OF SMOKE WAS SEEN IN THE COCKPIT EMANATING FROM THE PILOT'S SIDE OF THE INSTRUMENT PANEL. AT THE SAME TIME, AN ELECTRICAL SMOLDERING ODOR WAS DETECTED. THE WISPS OF SMOKE CLEARED WITHIN 20 SECONDS AND NO FURTHER SMOKE WAS VISUALIZED.
- [SDR CA090819006](https://openairdocs.org/sdr/CA090819006.md): Fitting · cracked · Aug 12, 2009 · Cessna 421B · Engine Fuel Distribution
  > ON WALK AROUND BEFORE FLIGHT A VERY SMALL POOL OF FRESH FUEL WAS DISCOVERED DRIPPING FROM BOTTOM OF LT ENG COWL, UPON FURTHER EXAMINATION A BRASS FUEL FITTING IN FUEL CONTROL ASSY. HAD CRACKED IN THE UPPER THREADED PORTION CAUSING FUEL TO LEAK FROM ENG JUST A
- [SDR 2009FA0000843](https://openairdocs.org/sdr/2009FA0000843.md): Cylinder · cracked · Apr 17, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder Section
  > REPAIRED CYLINDER FOUND TO BE CRACKED
- [SDR W9W2009F00000](https://openairdocs.org/sdr/W9W2009F00000.md): Windshield · departed · Apr 14, 2009 · N700BR · Cessna 421B · Flight Compartment Windows
  > WHILE CLIMBING THROUGH 6000 FT, THE PILOT SIDE WINDSHIELD BLEW OUT. PROBABLE CAUSE APPEARS TO BE A CRACK FROM ONE OF THE LWR ATTACH SCREWS THAT PROPAGATED OUT. SOME LOWER ATTACH SCREWS WERE RUSTY. WATER MAY HAVE MIGRATED INTO THE SCREW HOLES AND FROZEN, CAU
- [SDR 2009FA0000438](https://openairdocs.org/sdr/2009FA0000438.md): Bolt · sheared · Mar 30, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder Section
  > DURING FUEL SYSTEM SETUP, SEVERE OIL LEAK WAS OBSERVED WHICH NECESSITATED UBRUPT SHUTDOWN. UPON FURTHER INSPECTION A HOLE WAS DISCOVERED IN TOP OF NR 4 EXHAUST ROCKER COVER. WHEN COVER WAS REMOVED IT WAS FOUND THAT ROCKER SHAFT RETAINING BOLT HAD SHEARED AT
- [SDR 2009F00016](https://openairdocs.org/sdr/2009F00016.md): Gearbox · locked · Feb 24, 2009 · N421LP · Cessna 421B · Landing Gear Retraction/Extension System
  > LANDING GEAR WOULD NOT EXTEND ELECTRICALLY OR BY UTILIZING THE EMERGENCY GEAR EXTENSION SYSTEM. THE ACFT LANDED GEAR UP. POST INCIDENT INVESTIGATION WAS CONDUCTED ON SCENE AND A COMPLETE INSPECTION OF THE LANDING GEAR SYS WAS CONDUCTED WITH NO FINDINGS AS TO
- [SDR 2009FA0000842](https://openairdocs.org/sdr/2009FA0000842.md): Cylinder · cracked · Jan 20, 2009 · N54DR · Cessna 421B · Reciprocating Engine Cylinder Section
  > ECI REPAIRED CYLINDER FOUND TO BE CRACKED
- [SDR 2009FA0000841](https://openairdocs.org/sdr/2009FA0000841.md): Cylinder · cracked · Dec 5, 2008 · N54DR · Cessna 421B · Reciprocating Engine Cylinder Section
  > 12/25/08 6 CRACKED TCM CYLINDERS WERE REPLACED.
- [SDR CA081212002](https://openairdocs.org/sdr/CA081212002.md): Bearing · failed · Dec 5, 2008 · Cessna 421B · AC Generator-Alternator
  > (CAN) IN CRUISE PILOT NOTICED SPARKS COMING FROM RT ENGINE. UPON EXAMINATION ON GROUND BY MX, ALTERNATOR OUTER BRG. FAILED. SHAFT DEFORMED FROM HEAT. FAILURE OF CRANKSHAFT ALTERNATOR DRIVE GEAR CAUSED MAJOR INTERNAL ENGINE DAMAGE.
- [SDR 2008FA0000926](https://openairdocs.org/sdr/2008FA0000926.md): Control Cable · frayed · Dec 1, 2008 · Cessna 421B · Aileron Control System
  > TT ON CABLES UNKNOWN SUSPECT ORIGINAL. FOUND LT AFT AILERON CABLE FRAYED AT WING STA 59 THE PULLEY WAS FROZEN. INSPECTED REST OF SYSTEM NO DEFECTS FOUND. ON REPLACEMENT OF CABLE FOUND WAS ALSO FRAYED AT WING STA 87.29. THE PULLEYS AT THIS STATION WERE TURNING
- [SDR 2008FA0000924](https://openairdocs.org/sdr/2008FA0000924.md): Control Cable · frayed · Dec 1, 2008 · Cessna 421B · Aileron Control System
  > TT ON CABLES UNKNOWN SUSPECT ORIGINAL. FOUND LT AFT AILERON CABLE FRAYED AT WING STATION 58.94 THE PULLEY WAS FROZEN. INSPECTED REST OF SYSTEM NO DEFECTS FOUND. ON REPLACEMENT OF CABLE FOUND WAS ALSO FRAYED AT WING STA 87.29. THE PULLEYS AT THIS STATION WE
- [SDR 2007FA0001053](https://openairdocs.org/sdr/2007FA0001053.md): Lock Plate · missing · Nov 30, 2007 · N707DT · Cessna 421B · Reciprocating Engine Front Section
  > THIS ENGINE WAS REMOVED ON AUGUST 31, 2007, HOBBS TIME 1523.9 DUE TO CRACKED ENGINE CASE. THE ENGINE WAS SENT TO RAM AIRCRAFT FOR REPAIR. RAM REPAIRED THE ENGINE ON SEPT 20, 2007. THIS ENGINE WAS REINSTALLED BACK ON THE AIRCRAFT. DURING A NIGHT FLIGHT ON NOVEM
- [SDR O5W2007F00000](https://openairdocs.org/sdr/O5W2007F00000.md): Lock Plate · destroyed · Nov 20, 2007 · N707DT · Cessna 421B · Reciprocating Engine Front Section
  > THIS ENGINE WAS REMOVED ON AUG 31, 2007, HOBBS TIME 1523.9 DUE TO A CRACKED ENGINE CASE. THE ENGINE WAS SENT FOR REPAIR. REPAIRED THE ENGINE ON SEPT 20, 2007. THIS ENGINE WAS REINSTALLED ON AIRCRAFT. DURING A NIGHT FLIGHT ON NOV 20, 2007 THE PILOT HAD AN A
- [SDR CA070514024](https://openairdocs.org/sdr/CA070514024.md): Exhaust Valve · failed · May 14, 2007 · Cessna 421B · Reciprocating Engine Cylinder Section
  > (CAN) EXHAUST VALVE HEAD SEPARATED, STRIKING THE INTAKE VALVE AND CAUSING THE INTAKE VALVE TO FAIL. THE HEAD OF THE EXHAUST VALVE LODGED INTO THE EXHAUST PORT. THE INTAKE VALVE HAD (2) PIECES SEPARATE AND ONE LODGED ITSELF INTO THE TOP OF THE NR 1 CYLINDER HEA
- [SDR 2007FA0000366](https://openairdocs.org/sdr/2007FA0000366.md): Gasket · broken · Apr 12, 2007 · N42776 · Cessna 421B · Engine Oil Cooler
  > AIRCRAFT DEPARTED ON A CHARTER, PILOT WAS OVER LAKE WHEN HE NOTICED ENGINE OIL COMING OUT OF TOP ENGINE COWLING COOLING LOUVERS. PILOT NOTIFIED CONTROL HE WAS LOSING OIL. FEATHERED THE RT ENGINE AND DIVERTED. PILOT MADE UNEVENTFUL SINGLE ENGINE LANDING AN
- [SDR CA070228008](https://openairdocs.org/sdr/CA070228008.md): Window · cracked · Feb 8, 2007 · Cessna 421B · Door Windows
  > (CAN) DURING MAJOR INSPECTION OF AIRCRAFT, REMOVED PLASTIC UPHOLSTERY COVER ON THE EMREGENCY EXIT HATCH. WINDOW FOUND CRACKED AT ALL LOWER ATTACH SCREW HOLES, ONLY THE SEALANT KEEPING THE WINDOW IN PLACE. (TC NR 20070228008)
- [SDR 1538T092806](https://openairdocs.org/sdr/1538T092806.md): Duct · blown · Sep 28, 2006 · N1538T · Cessna 421B · Air Distribution System
  > CABIN BEGAN TO CLIMB AT 2000 FPM DURING CRUISE AT 12,500 FT. DESCENT TO 10,500 FT. CABIN WOULD ONLY MAINTAIN 2.5 PSID. CHECKED OUTFLOW AND SAFETY VALVES, MOISTURE DRAINS, LANDING GEAR BOOTS, FAILEADS ALL FOUND OK. PERFORM GROUND CHECK OF SYSTEM FOUND NO AU
- [SDR 2006F00031](https://openairdocs.org/sdr/2006F00031.md): Engine · seized · Jul 18, 2006 · N37676 · Cessna 421B · Engine (Reciprocating)
  > PILOT REPORTED VIBRATION FROM LT ENGINE SHORTLY AFTER TAKEOFF. SECURED ENGINE, RETURNED TO AIRPORT. INITIAL INVESTIGATION FOUND ENGINE SEIZED/LOCKED UP. SUSPECT BROKEN CRANKSHAFT OR CONNECTING ROD. ENGINE RETURNED TO OVERHAUL FACILITY.
- [SDR 2006FA0000475](https://openairdocs.org/sdr/2006FA0000475.md): Hinge Bracket · elongated · May 10, 2006 · N1944G · Cessna 421B · Elevator Control System
  > CUSTOMER REPORTED VIBRATION AT HIGH SPEEDS. INSPECTED AIRCRAFT AND FOUND CENTER ELEVATOR HINGE IB AND OB BRACKETS ELONGATED ON THE RT ELEVATOR. INSTALLED MFG SERVICE KIT SK421-130B REPLACING ALUMINUM ELEVATOR HINGE BRACKETS WITH STAINLESS STEEL BRACKETS.
- [SDR 21200003AD](https://openairdocs.org/sdr/21200003AD.md): Hinge · damaged · May 10, 2006 · N1944G · Cessna 421B · Elevator Control System
  > CUSTOMER REPORTED VIBRATION AT HIGH SPEEDS. INSPECTED AIRCRAFT AND FOUND CENTER ELEVATOR HINGE INBOARD AND OUTBOARD BRACKETS ELONGATED ON THE RIGHT ELEVATOR. INSTALLED CESSNA SERVICE KIT SK421-130B REPLACING ALUMINUM ELEVATOR HINGE BRACKETS WITH STAINLESS STEE
- [SDR 2006F00002](https://openairdocs.org/sdr/2006F00002.md): Unknown · unknown · Jan 12, 2006 · N37676 · Cessna 421B · Powerplant System
  > DURING TAKEOFF FROM 2W6 LT ENGINE SHUTDOWN, SECURED ENGINE, CIRCLED, RETURNED FOR LANDING. CAUSE YET TO BE DETERMINED. PRELIMINARY INDICATIONS ARE FAILED FUEL PUMP DRIVE/ACCESSORY DRIVE.
- [SDR 2006FA0000002](https://openairdocs.org/sdr/2006FA0000002.md): Circuit Breaker · corroded · Jan 4, 2006 · N678DB · Cessna 421B · Electrical Power System Wiring
  > AVIONICS MASTER CIRCUIT BREAKER SWITCH FOUND INTERMITTENT DURING COMPLIANCE WITH AD 2005-20-05, MEB05-1. PN 593-240-101 NOT FOUND IN MFG PARTS MANUAL BUT THIS WAS CLEARLY THE ORIGINAL FACTORY INSTALLED CB. PROBLEM NR1, INTERNAL COMPONENTS OF CB HAD SEVERE C
- [SDR CA051220007](https://openairdocs.org/sdr/CA051220007.md): Bellcrank · broken · Dec 7, 2005 · Cessna 421B · Landing Gear Door Retract Section
  > AIRCRAFT LAND GEAR EXTENSION CARRIED OUT AS NORMAL ON AIRPORT APPROACH. ON THE GROUND, THE PILOT NOTICED THAT THE RIGHT MAIN GEAR INBOARD DOOR WAS NOT CLOSED. UPON FURTHER INSPECTION BY AN AME, RT GEAR DOOR RETRACTION SYSTEM BELLCRANK P/N 0841106-6 WAS FOUND

Next page: https://openairdocs.org/model/cessna-421b/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 = '421B'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/cessna-421b/reports

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