# Service difficulty reports: Beech B90

A list on [Beech B90](https://openairdocs.org/model/beech-b90.md).

Newest first. General aviation reporting is voluntary.

- [SDR 2025F00171](https://openairdocs.org/sdr/2025F00171.md): Oil System · low pressure · Jul 31, 2025 · N176TW · Beech B90 · Engine Oil Pressure
  > DEPARTED GYH-ADS, AT FL180 PILOT NOTED SPARKS BY THE RT ENGINE AND THEN THE OIL PRESSURE WARNING LIGHT ACTIVATED AND PRESSURE GAUGE SHOWED 0. ENGINE WAS SHUTDOWN, ATC CONTACTED AND PERFORMED AN UNSCHEDULED LANDING AT THE NEAREST AIRPORT.
- [SDR CA140602002](https://openairdocs.org/sdr/CA140602002.md): Tube · cracked · Apr 9, 2014 · Beech B90 · Engine Fuel Distribution
  > (CAN) 1 ENGINE ON THIS ACFT HAS REPORTEDLY EXPERIENCED REPETITIVE FUEL TUBES CRACKING, 3 TIMES IN THE RECENT PAST. THE FUEL TUBES WILL BE SENT TO MFG FOR FURTHER INVESTIGATION.
- [SDR 2012FA0000544](https://openairdocs.org/sdr/2012FA0000544.md): Support · cracked · Jun 12, 2012 · N821DA · Beech B90 · Landing Gear Actuator
  > DISCOVERED THE LANDING GEAR SUPPORT ASSY FOR THE LEFT MLG ACTUATOR HAD CRACKS THAT HAD GONE UNDETECTED. THE FAILURE OF THIS SUPPORT BRACKET WHILE THE LANDING GEAR WAS BEING EXTENDED, ALLOWED THE LANDING GEAR TO EXTEND ENOUGH TO PROVIDE A DOWN AND LOCKED INDI
- [SDR CA090529004](https://openairdocs.org/sdr/CA090529004.md): Actuator Cable · loose · May 26, 2009 · Beech B90 · Elevator Control System
  > (CAN) DURING FLIGHT, THE PILOT NOTICED THAT THE ELEVATOR TRIM WAS NOT FUNCTIONING AND REMAINED IN THE NEUTRAL POSITION. AFTER LANDING, WHEN IT WAS INSPECTED, WHAT WAS FOUND WAS THAT THE KEY THAT HOLDS THE SHAFT HAD COME LOOSE ALLOWING THE SHAFT TO FALL OUT AND
- [SDR CA060828003](https://openairdocs.org/sdr/CA060828003.md): Selector Valve · malfunctioned · Aug 28, 2006 · Beech B90 · Landing Gear Retraction/Extension System
  > (CAN) ON SCHEDULED MAINTENANCE 1000 HRS HYD. SYSTEM 3000 PSI LEAK TEST (LANDING GEAR MM M-8101, ROUTINE MAINTENANCE) HYD. SELECTOR FOUND LEAKING TO RETURN ON GEAR DOWN SECTION. WAS UNABLE TO BUILD UP PRESSURE TO OPERATE GEAR WITH MANUAL EXTERNAL PUMP. NEW HY
- [SDR CA060828002](https://openairdocs.org/sdr/CA060828002.md): Selector Valve · failed · Aug 28, 2006 · Beech B90 · Landing Gear Retraction/Extension System
  > (CAN) DURING THE SCHEDULED TASK TO LEAK CHECK THE LANDING GEAR SYSTEM (LANDING GEAR MM M-8101, ROUTINE MAINTENANCE) IT WAS NOT POSSIBLE TO BUILD PRESSURE IN THE LANDING GEAR HYDRAULIC SYSTEM WITH THE MANUAL PUMP INSTALLED. UPON INVESTIGATION IT WAS FOUND THAT
- [SDR 2006FA0000252](https://openairdocs.org/sdr/2006FA0000252.md): Boot · mismanufactured · Feb 22, 2006 · N379VM · Beech B90 · Airfoil Anti/De-ice System
  > ON INSTALLATION OF NEW LT AND RT WING DE-ICE BOOTS, PMA P/N SMR2014-21-1, -2, WAS DISCOVERED AIR INLET TUBES ARE INSTALLED IN WRONG LOCATION, MAKING IT IMPOSSIBLE TO MATCH BOOT CENTERLINE WITH LE CENTERLINE. OEM DRAWINGS SHOW 1 INCH FROM BOOT CENTERLINE TO I
- [SDR 2006FA0000251](https://openairdocs.org/sdr/2006FA0000251.md): Boot · mislocated · Feb 22, 2006 · N379VM · Beech B90 · Airfoil Anti/De-ice System
  > UPON INSTALLATION OF NEW LT AND RT WING DE-ICE BOOTS WITH NEW PMA P/N SMR2014-21-1, AND -2, IT WAS DISCOVERED THE AIR INLET TUBES ARE INSTALLED IN THE WRONG LOCATION, MAKING IT IMPOSSIBLE TO MATCH THE BOOT CENTERLINE WITH THE LE CENTERLINE. MFG AND OEM DRAWIN
- [SDR CA050419003](https://openairdocs.org/sdr/CA050419003.md): Drive Assy · inoperative · Mar 29, 2005 · Beech B90 · Engine Fuel Pump
  > (CAN) DURING TAKEOFF ROLL THE ENGINE EXPERIENCED AN UNCOMMANDED SHUTDOWN. TROUBLESHOOTING REVEALED A WORN FUEL PUMP DRIVE. THE FUEL PUMP WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.
- [SDR 2004FA0000796](https://openairdocs.org/sdr/2004FA0000796.md): Bolt · loose · Aug 15, 2004 · N148Z · Beech B90 · Fasteners
  > INSPECTION AFTER TURBULENT AIR, DISCOVERED BOTH UPPER FWD WING BOLTS AND NUTS WERE ONLY INSTALLED HAND TIGHT. REVEALED THAT WING BOLT INSP HAD BEEN COMPLETED 116.8 HOURS BEFORE. WING BOLT RETORQUE CHECK HAD BEEN COMPLIED WITH 72.8 HOURS AFTER THAT. AIRCRAFT
- [SDR IJA2004F00000](https://openairdocs.org/sdr/IJA2004F00000.md): Plate · broken · Jan 27, 2004 · N777KU · Beech B90 · Brake
  > ON LANDING PILOT NOTICED LT BRAKE WAS SOFT. AFTER SHUT DOWN PILOT NOTICED THAT THE LT AFT BRAKE CALIPER WAS BROKEN IT APPEARS THAT THE LT BRAKE TORQUE PLATE LOWER AFT CALIPER ATTACH POINT BROKE WHEN THE BRAKES WERE APPLIED.
- [SDR CA030424007](https://openairdocs.org/sdr/CA030424007.md): Nozzle · leaking · Mar 28, 2003 · Beech B90 · Heating System
  > (CAN) HEATER UNSERVICEABLE, LEAK FOUND ON HEAD ASSY. PARTS INSTALLED, NOZZEL, GASKETS, ELEC GROUND, ELEC WASHERS, GASKET HEAD, IGN, IGN UNIT, VALVE, BRUSH KIT, FILTER, VENT BLOWER MOTOR O/H. HEATER, SMOKY BLACK, PARTS INSTALLED, REG VALVE, VALVE, IGN, EXHAUST
- [SDR 20001222SH007](https://openairdocs.org/sdr/20001222SH007.md): Seal · leaking · Dec 14, 2000 · N777KU · Beech B90 · Cabin Compressor System
  > PILOT ABORTED FLIGHT DUE TO SMELL OF SMOKE IN CABIN. FOUND SUPERCHARGER SEAL LEAKING OIL INTO AIRCRAFT SILENCER. THIS MIXTURE OF OIL AND BLEED AIR CAUSED SMOKE TO ENTER CABIN. (X)
- [SDR CA000419010](https://openairdocs.org/sdr/CA000419010.md): Shunt · broken · Apr 11, 2000 · Beech B90 · DC Indicating System
  > (CAN) BAKELITE BASE MOUNTING PADS CRACKED ALLOWING R/H LOADMETER SHUNT TO MOVE FORWARD ENOUGH TO ALLOW SHUNT WIRE TERMINALS TO TOUCH HEAT SINK CONTAINING REVERSE CURRENT DIODE.RT AMMETER INDICATION WAS INTERMITTANTLY LOST. FURTHER INVESTIGATION FOUND THE LOAD
- [SDR 99ZZZX2520](https://openairdocs.org/sdr/99ZZZX2520.md): Wire · failed · Jun 1, 1999 · N901WL · Beech B90 · Electrical Power System Wiring
  > AFTER RUNNING THE AIR CONDITIONER DURING A PHSE INSPECTION, SMOKE WAS SEEN AND AND ODOR WAS DETECTED IN THE COCKPIT. FOUND WIRE PB3A2 SMOULDERING UNDER THE CENTER PEDESTAL AT THE ISOLATION LIMITER BUS. WIRES P83A2 AND P83B2 ARE ALUMINUM WIRES RUNNING FROM TH
- [SDR CA990119003](https://openairdocs.org/sdr/CA990119003.md): Bracket · cracked · Jan 7, 1999 · Beech B90 · Elevator Structure
  > (CAN) CRACK FOUND ON THE LEFT INBOARD ELEVATOR SUPPORT BRACKET. THE CRACK RADIATED FROM THE LOWER RIGHT BOLT HOLE TO THE WEB OPENING.
- [SDR 98ZZZX3585](https://openairdocs.org/sdr/98ZZZX3585.md): Bearing · failed · Aug 20, 1998 · N603PA · Beech B90 · Turbine Section
  > IN-FLIGHT, ENGINE POWER LOSS. LT ENGINE SLOWED AND LOST POWER. PILOT FEATHERED PROPELLER. FLIGHT LANDED WITHOUT INCIDENT. ENGINE REMOVED. ENGINE, SN PCE21765, PT6A-20, DISASSEMBLED. BEARING NR 2 FOUND FAILED. BEARING EXAMINED FOR LUBRICATION STARVATION.
- [SDR CA980629014](https://openairdocs.org/sdr/CA980629014.md): Skin · cracked · Jun 17, 1998 · Beech B90 · Elevator, Plate/Skin
  > (CAN) DURING INSPECTION BEECH SI-0423-133, A 1 INCH CRACK DISCOVERED ON LT ELEVATOR LOWER SKIN AT EDGE OF OVERLAP WITH OUTBOARD SKIN. DURING REPAIR WHEN THE SKIN WAS REMOVED THE CRACK RAN 6 INCHES LONG UNDER THE OVERLAP. REPAIRED. PART TC: 14,763.
- [SDR 98ZZZX2707](https://openairdocs.org/sdr/98ZZZX2707.md): Engine · failed · Jun 1, 1998 · N603PA · Beech B90 · Engine (Turbine/Turboprop)
  > LEFT ENGINE LOST POWER IN-FLIGHT. AIRCRAFT LANDED WITH NO INCIDENT. NO DETERMINATION MADE, UNIT MUST BE TORN DOWN TO INSPECT. SOUNDS LIKE BAD BEARINGS WHEN MOTORED BY STARTER. ACFT LOST POWER IN-FLIGHT. LANDED SAFELY AT SHEBOYGAN, WINCONSIN. PILOT REPORT
- [SDR 98ZZZX2006](https://openairdocs.org/sdr/98ZZZX2006.md): Torque Knee · cracked · Apr 29, 1998 · N7BF · Beech B90 · Landing Gear Retraction/Extension System
  > DURING BEECH SB 32-3134, FOUND A MLG TORQUE KNEE WITH A CRACK.
- [SDR 97ZZZX3036](https://openairdocs.org/sdr/97ZZZX3036.md): Strut · cracked · Jun 23, 1997 · N48A · Beech B90 · Main Landing Gear Strut/Axle/Truck
  > A CRACK WAS FOUND IN THE FILLET AREA ABOVE THE PIVOT OF THE TOP SCISSOR ARM.
- [SDR 97ZZZX3358](https://openairdocs.org/sdr/97ZZZX3358.md): Hinge · cracked · May 27, 1997 · N55MG · Beech B90 · Elevator Structure
  > WHEN INSPECTING AD 77-22-01 ELEVATOR HINGE, PN 50-524420-3, LEFT SIDE WAS FOUND TO HAVE A CRACK AT THE TOP OUTBOARD ATTACHMENT HOLE. REPLACED ELEVATOR HINGE.
- [SDR CA970513010](https://openairdocs.org/sdr/CA970513010.md): Skin · cracked · May 7, 1997 · Beech B90 · Elevator, Plate/Skin
  > (CAN) DURING 150 HR INSPECTION OF ELEVATOR AND STAB SKIN PER BEECH SI 0086-131, A 10 INCH CRACK WAS FOUND IN THE ELEVATOR UPPER SKIN BARREL TO DIRECTION OF FLIGHT ON THE EDGE OF OVERLAP OF TWO SKINS. SKIN REPLACED. AIRCRAFT TT: 11,077 HOURS.
- [SDR 97ZZZX1814](https://openairdocs.org/sdr/97ZZZX1814.md): Flap Cables · failed · Feb 19, 1997 · N55MG · Beech B90 · Trailing Edge Flap Control System
  > RIGHT FLAP FLEX CABLES FAILED WHEN FLAPS SELECTED TO 60, SPLIT FLAP CONDITION OCCURRED, LT FLAPS WENT TO FULL EXTENSION, RT OTBD WENT TO APPROX 30, RT INBD STAYED IN FULL UP POSITION. CABLES FAILED AT DRIVE ENDS AT TRANSMISSION, SWAGES FAILED, AND ENDS WERE F
- [SDR 97ZZZX1813](https://openairdocs.org/sdr/97ZZZX1813.md): Flap Cables · failed · Feb 19, 1997 · N55MG · Beech B90 · Trailing Edge Flap Control System
  > RIGHT FLAP FLEX CABLES FAILED WHEN FLAPS SELECTED TO 60, SPLIT FLAP CONDITION OCCURRED, LT FLAPS WENT TO FULL EXTENSION, RT OTBD WENT TO APPROX 30, RT INBD STAYED IN FULL UP POSITION. CABLES FAILED AT DRIVE ENDS AT TRANSMISSION, SWAGES FAILED, AND ENDS WERE F
- [SDR CA961115012](https://openairdocs.org/sdr/CA961115012.md): Flap Spars · cracked · Nov 4, 1996 · Beech B90 · Trailing Edge Flaps
  > (CAN) BOTH LEFT AND RIGHT HAND INBOARD FLAPS WERE FOUND TO HAVE CRACKS IN THEIR SPARS. THE CRACKS, APPROXIMATELY 1 INCH IN LENGTH ARE LOCATED AT THE SLOT IN THE SPAR THAT ALLOWS THE INBOARD FLAP TRACK TO PASS THROUGH. THE CRACKS RADIATE IN BOTH DIRECTIONS AWAY
- [SDR EY2R9601226](https://openairdocs.org/sdr/EY2R9601226.md): Clamp · corroded · Nov 1, 1996 · Beech B90 · Propeller Assembly
  > CLAMPS, SN'S EK395, EK359, FOUND CORRODED.
- [SDR EY2R9600122](https://openairdocs.org/sdr/EY2R9600122.md): Pilot Tube · cracked · Oct 1, 1996 · Beech B90 · Propeller Assembly
  > PROP ASSY IS CRACKED. ALL 3 PILOT TUBES
- [SDR EY2R9600121](https://openairdocs.org/sdr/EY2R9600121.md): Bearing · cracked · Oct 1, 1996 · Beech B90 · Propeller Assembly
  > PROP ASSY BEARING CRACKED
- [SDR 96ZZZX4711](https://openairdocs.org/sdr/96ZZZX4711.md): Shunt · broken · Aug 27, 1996 · N40CK · Beech B90 · DC Indicating System
  > MOUNTING BASE OF AMMETER SHUNT BROKE UP AROUND THE 2 MOUNTING SCREWS ALLOWING THE SHUNT TO MOVE ABOUT. THE BASE OF THE MOUNT IS HOLLOW EXPOSING THE SCREWS THAT HOLD THE TERMINAL BLOCKS TO THE BASE. THESE SCREWS CONTACTED THE BASE MOUNTING SCREWS ARCING TO GR
- [SDR EY2R9600829](https://openairdocs.org/sdr/EY2R9600829.md): Pitch Chg Rod · corroded · Jun 1, 1996 · Beech B90 · Propeller Assembly
  > PITCH CHANGE ROD FOUND CORRODED.
- [SDR EY2R9600828](https://openairdocs.org/sdr/EY2R9600828.md): Hub · corroded · Jun 1, 1996 · Beech B90 · Propeller Hub Section
  > HUB FOUND CORRODED.
- [SDR EY2R9600827](https://openairdocs.org/sdr/EY2R9600827.md): Split Bearing · corroded · Jun 1, 1996 · Beech B90 · Propeller Assembly
  > CORROSION FOUND ON SPLIT BEARING.
- [SDR 96ZZZX2700](https://openairdocs.org/sdr/96ZZZX2700.md): Bearing · failed · Apr 30, 1996 · N388MC · Beech B90 · Fuel Control/Turbine Engines
  > RIGHT ENGINE FLUCTUATIONS 2-3 SECONDS, 3 TIMES. AIRCRAFT YAW. FIFTEEN MINUTES LATER, FLUCTUATINS OCCURRED THEN FUEL FLOW WENT TO ZERO. ENGINE QUIT. RESTARTED ON GROUND, NO RESPONSE TO THROTTLE. DISASSEMBLED FUEL CONTROL, FOUND BUSHING ASSY BEARING FAILED.
- [SDR EY2R9601413](https://openairdocs.org/sdr/EY2R9601413.md): Clamp · pitted · Feb 1, 1996 · Beech B90 · Propeller Blade Section
  > BLADE CLAMP HAS PITS IN RADIUS
- [SDR EY2R9600371](https://openairdocs.org/sdr/EY2R9600371.md): Blade · corroded · Feb 1, 1996 · Beech B90 · Propeller Blade Section
  > BLADE, SN 62744, FOUND CORRODED.
- [SDR EY2R9600370](https://openairdocs.org/sdr/EY2R9600370.md): Clamp · corroded · Feb 1, 1996 · Beech B90 · Propeller Assembly
  > CORROSION FOUND ON CLAMP.
- [SDR CA960131008](https://openairdocs.org/sdr/CA960131008.md): Arm Assembly · missing parts · Jan 15, 1996 · Beech B90 · Propeller Controlling System
  > (CAN)AFTER START THE LEFT HAND SECONDARY LOW PITCH ANNUNCIATOR WAS NOT ILLUMINATING AS REQUIRED. MAINTENANCE INVESTIGATION REVEALED THE CARBON BRUSH BLOCK OF THE PROPELLER PITCH REVERSING ARM ASSEMBLY WAS MISSING & THE ATTACHING LEVER ARM WAS BENT. THERE WAS
- [SDR CA951030009](https://openairdocs.org/sdr/CA951030009.md): Fitting · corroded · Oct 19, 1995 · Beech B90 · Passenger Oxygen System
  > (CAN)DURING THE ROUTINE INSPECTION AND TEST OF THE OXYGEN SYSTEM A HISSING NOISE WAS DETECTED EMANATING FROM BEHIND THE LEFT SIDE PANEL OF THE CABIN. UPON FURTHER INVESTIGATION THE UNION FITTING IN THE OXY GEN LINE AT FUSELAGE STA. 176.5 BETWEEN LINE P/N 50560
- [SDR 95ZZZX3200](https://openairdocs.org/sdr/95ZZZX3200.md): Hose Assy · deteriorated · May 15, 1995 · N320E · Beech B90 · Pneumatic Distribution System
  > PILOT REPORTED PNEUMATIC PRESSURE AND VACUUM LOW AND DROPPING. FOUND PNEUMATIC REGULATOR CONTAMINATED WITH BLACK 'DUST' AND LARGER PIECES OF DEBRIS IN INLET LINE. TRACED PROBLEM TO PNEUMATIC SUPPLY HOSE AT LT ENGINE. APPROX ONE-THIRD OF INTERNAL PORTION OF
- [SDR 95ZZZX2444](https://openairdocs.org/sdr/95ZZZX2444.md): Hinge · cracked · May 1, 1995 · N984AA · Beech B90 · Elevator Structure
  > DURING INSPECTION, DISCOVERED THE LT ELEV HINGE LOWER LT (OUTBOARD) ATTACH POINT OF THE CASTING HAD CRACKED THROUGH THE BOLT HOLE. THIS ALLOWED THE BROKEN PIECE TO FALL OUT WHEN THE AN4 BOLT WAS REMOVED. CAUSE OF THIS PROBLEM IS UNKNOWN AS NO OTHER DEFECTS A
- [SDR 95ZZZX1683](https://openairdocs.org/sdr/95ZZZX1683.md): Compressor · fod damage · Mar 23, 1995 · N939K · Beech B90 · Turbine Engine Compressor Section
  > MGY - EN ROUTE, RT ENGINE FUEL FLOW FLUCTUATED AND FLAMES WERE OBSERVED OUT OF EXHAUST. FLIGHT DIVERTED TO DAY WHERE INSPECTION SHOWED FOD TO FIRST STAGE COMPRESSOR. ENGINE REMOVED FOR INSPECTION AND REPAIR FOLLOW-UP.
- [SDR 95ZZZX751](https://openairdocs.org/sdr/95ZZZX751.md): Pump · failed · Jan 11, 1995 · N14VK · Beech B90 · Engine Fuel Pump
  > DURING APROACH TO LANDING, RIGHT ENGINE LOST POWER. INSPECTION AND REMOVAL OF THE FUEL PUMP REVEALED A FAILURE OCCURRED INTERNALLY IN THE FUEL PUMP ASSY. THIS ALSO CAUSED THE ENGINE-TO-PUMP DRIVE COUPLING TO FAIL. FAILURE OF THE ENGINE DRIVEN PUMP AND DRIVE

## 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 = 'B90'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/beech-b90/reports

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