# Service difficulty reports: Continental IO-520-BB

A list on [Continental IO-520-BB](https://openairdocs.org/engine/continental-io-520-bb.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 8 · 388 reports

- [SDR 2025FA0000662](https://openairdocs.org/sdr/2025FA0000662.md): Intake Valve · damaged · Sep 24, 2025 · N66919 · Beech A36 · Reciprocating Engine Cylinder Section
  > THE INTAKE VALVE HAS MATERIAL MISSING IN I LOCATIONS AROUND THE PERIMETER OF THE VALVE HEAD SEAT AREA, LT APPEARS TO BE VALVE FAILURE AND NOT FOD, (OTHER INFO FOUND ON VALVE WFAA PMA719077QITALY),
- [SDR 2025FA0000349](https://openairdocs.org/sdr/2025FA0000349.md): Retaining Clip · worn · May 9, 2025 · N4147S · Beech F33A · Powerplant System
  > COWLING - RIGHT SIDE - HOLD OPEN LATCH/LEVER SLIPPED LOOSE IN FLIGHT AND FELL DOWN ON BATTERY MASTER RELAY CAUSING A SHORT AND BURNED OUT THE DIODES USED TO APPLY POWER TO THE RELAY COIL. NO SMOKE OR FIRE AND NO INDICATION INFLIGHT. THE "CLIPS" THAT HOLD THI
- [SDR CA190823007](https://openairdocs.org/sdr/CA190823007.md): Case Half · cracked · Jun 10, 2019 · Beech 36BEECH · Reciprocating Engine Power Section
  > (CAN) OWNER OF AIRCRAFT REPORTED AN OIL LEAK. UPON INSPECTING FOR THE OIL LEAK A CRACK WAS FOUND. CRACK WAS APPROXIMATELY 6 INCH LONG IN THE CASE HALF ABOVE THE THE #2 CYLINDER BORE INTERSECTING WITH TOP REAR CYLINDER BASE STUD. ENGINE WAS REMOVED AND SENT F
- [SDR 2019FA0000149](https://openairdocs.org/sdr/2019FA0000149.md): Cable Assy · corroded · May 13, 2019 · N69SH · Beech 35C33A · Aileron Control System
  > ON AN ANNUAL INSPECTION OF THE AIRCRAFT, FOUND RIGHT AILERON CABLE BROKEN AT SWAGED PORTION ATTACHED TO TURNBUCKLE. THE CABLE WAS HELD TOGETHER ONLY BY THE SAFETY WIRE OF THE TURNBUCKLE. SOME CORROSION COULD BE SEEN ON THE SWAGED PORTION AFTER THE SAFETY WIRE
- [SDR 2019FA0000033](https://openairdocs.org/sdr/2019FA0000033.md): Control Cable · broken · Jan 5, 2019 · N3704Q · Beech V35 · Aileron Control System
  > DURING ANNUAL INSPECTION, FOUND RIGHT AILERON CABLE BROKEN AT SWAGED END BETWEEN SAFETY WIRE HOLE AND THREADED END. SAFETY WIRE WAS HOLDING IT TOGETHER.
- [SDR 2018FA0000413](https://openairdocs.org/sdr/2018FA0000413.md): Display · failed · Oct 9, 2018 · N8268T · Beech F33A · Central Display
  > THE REMOTE AUXILIARY DISPLAY WENT INOPERATIVE DURING TAKE-OFF.
- [SDR 2018FA0000036](https://openairdocs.org/sdr/2018FA0000036.md): Circuit Breaker · failed · Jan 12, 2018 · N1569A · Beech F33A · Exterior Lighting
  > PILOT REPORTED LANDING LIGHT INOP. TROUBLESHOOTING DISCOVERED CIRCUIT BREAKER HAD FAILED.
- [SDR 2018FA0000037](https://openairdocs.org/sdr/2018FA0000037.md): Circuit Breaker · failed · Jan 12, 2018 · N5540P · Beech F33A · Exterior Lighting
  > PILOT REPORTED THE TAXI LIGHT INOPERATIVE. TROUBLESHOOTING DISCOVERED THE CIRCUIT BREAKER HAD FAILED.
- [SDR 2017FA0000651](https://openairdocs.org/sdr/2017FA0000651.md): Circuit Breaker · failed · Dec 18, 2017 · N5530A · Beech F33A · Light System Wiring
  > PILOT REPORTED BEACON ONLY WORKS WHEN SWITCH ON AND OFF SEVERAL TIMES. CIRCUIT BREAKER WAS REPLACED, OPS CHECK NORMAL.
- [SDR 2017FA0000653](https://openairdocs.org/sdr/2017FA0000653.md): Circuit Breaker · failed · Dec 18, 2017 · N8268T · Beech F33A · Light System Wiring
  > PILOT REPORTED LANDING LIGHT INOP. TROUBLESHOOTING DISCOVERED CIRCUIT BREAKER HAD FAILED.
- [SDR T22R201607260001](https://openairdocs.org/sdr/T22R201607260001.md): Crankshaft · mismanufactured · Jul 26, 2016 · N3864 · Reciprocating Engine Power Section
  > CRANKSHAFT NR 1 BOTTOM BLADE BUSHING, LOCATED APPROXIMATELY.100 OFFSET ON ITS HORIZONTAL PLAIN WHICH ALLOWED COUNTERWEIGHT WHEN ASSEMBLED TO CRANKSHAFT BLADE TO CONTACT INSIDE EDGE OF COUNTERWEIGHT CAUSING DAMAGE TO INSIDE EDGE OF COUNTERWEIGHT.
- [SDR 2016FA0000194](https://openairdocs.org/sdr/2016FA0000194.md): Circuit Breaker · failed · Apr 26, 2016 · N8252T · Beech F33A · Light System Wiring
  > PILOT REPORTED THAT THE NAVIGATION LIGHTS WERE INOPERATIVE. THE TECH TROUBLESHOT THE SYS AND DISCOVERED THE NAVIGATION LIGHTS FAILED. THE TECH REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR 2016FA0000146](https://openairdocs.org/sdr/2016FA0000146.md): Circuit Breaker · failed · Mar 29, 2016 · N8242T · Beech F33A · Exterior Lighting
  > PILOT REPORTED THAT THE STROBE LIGHT WAS INOPERATIVE. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE STROBE LIGHT FAILED. THE TECH REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR VJ3R2016FA0000079](https://openairdocs.org/sdr/VJ3R2016FA0000079.md): Circuit Breaker · failed · Feb 9, 2016 · N8101C · Beech F33A · Light System Wiring
  > PILOT REPORTED THAT THE LANDING LIGHT WAS INOPERATIVE. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE LANDING LIGHT CIRCUIT BREAKER FAILED. THE TECH REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR VJ3S2016FA0000043](https://openairdocs.org/sdr/VJ3S2016FA0000043.md): Circuit Breaker · failed · Jan 29, 2016 · N8268T · Beech F33A · Light System Wiring
  > PILOT REPORTED THAT THE ANTI-COLLISION LIGHT WAS INOPERATIVE. THE TECH TROUBLESHOT THE SYS AND DISCOVERED THE ANTI-COLLISION LIGHT FAILED. THE TECH REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR VJ3S2016FA0000018](https://openairdocs.org/sdr/VJ3S2016FA0000018.md): Circuit Breaker · failed · Dec 16, 2015 · N8240T · Beech F33A · Light System Wiring
  > PILOT REPORTED THAT THE BEACON LIGHT WAS INOPERATIVE. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE BEACON LIGHT FAILED. THE TECH REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR VJ3S2016FA0000017](https://openairdocs.org/sdr/VJ3S2016FA0000017.md): Circuit Breaker · failed · Dec 15, 2015 · N8173C · Beech F33A · Electrical Power System Wiring
  > PILOT REPORTED THAT THE ALTERNATOR WAS INOPERATIVE. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE ALTERNATOR CIRCUIT BREAKER SWITCH WAS AT FAULT. THE TECH REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR VJ3R2015FA0000623](https://openairdocs.org/sdr/VJ3R2015FA0000623.md): Circuit Breaker · failed · Dec 4, 2015 · N1569P · Beech F33A · Electrical Power System Wiring
  > PILOT REPORTED THAT THE ALTERNATOR WAS INOPERATIVE. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE ALTERNATOR CIRCUIT BREAKER SWITCH FAILED. THE TECH REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR MAMR2015121600654](https://openairdocs.org/sdr/MAMR2015121600654.md): Housing · damaged · Dec 4, 2015 · N354DP · Beech V35 · Exhaust Turbocharger
  > TURBOCHARGER RECEIVED IN FOR INSPECTION, FOUND THE TURNINE HOUSING HAD DEVELOPED A GROWTH OR DEFORMITY IN THE CASTING. THIS DECREASED THE CLEARANCE BETWEEN THE TURBINE HOUSING AND THE TURBINE WHEEL CAUSING THE TURBO TO RUB/STICK. REPLACED THE TURBINE HOUSING
- [SDR 2015FA0000606](https://openairdocs.org/sdr/2015FA0000606.md): Housing · deformed · Nov 3, 2015 · N110CC · Beech V35 · Exhaust Turbocharger
  > TURBOCHARGER RECEIVED IN FOR INSPECTION. FOUND THE TURBINE HOUSING HAD DEVELOPED A GROWTH OR DEFORMITY IN THE CASTING. THIS DECREASED THE CLEARANCE BETWEEN THE TURBINE HOUSING AND TURBINE WHEEL CAUSING A SLIGHT RUB OR CLUNKING SOUND. REPLACED THE TURBINE HO
- [SDR 2015FA0000281](https://openairdocs.org/sdr/2015FA0000281.md): Throttle Arm · disconnected · Jun 22, 2015 · N54VK · Beech V35 · Power Lever
  > PRACTICING AN INSTRUMENT APPROACH INTO AIRPORT. PILOT FLYING WAS SLIGHTLY LOW ON A NON-PRECISION INSTRUMENT APPROACH. POWER SETTING WAS 15" MAP. APPLICATION OF FULL THROTTLE, DID NOT INCREASE MANIFOLD PRESSURE. AFTER SAFE LANDING ON RUNWAY WITH NO DAMAGE T
- [SDR VJ3R2015061000267](https://openairdocs.org/sdr/VJ3R2015061000267.md): Circuit Breaker · failed · Jun 10, 2015 · N1570A · Beech F33A · AC Inverter
  > PILOT REPORTED THAT THE ALTERNATOR OUT LIGHT TURNED ON. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE ALTERNATOR SWITCH FAILED. THE TECH REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR LS6R2015FA0000195](https://openairdocs.org/sdr/LS6R2015FA0000195.md): Tube · damaged · May 12, 2015 · N6197U · Beech F33A · Aircraft Fuel Distribution System
  > ENGINE RAN FINE ONE DAY, BUT NEXT DAY ALTHOUGH IT WOULD START, IT WOULD DIE AFTER JUST A FEW SECONDS. FOUND IT WOULD CONTINUE TO RUN ONLY IF BOOST PUMP WAS LEFT ON. ASSUMED ENGINE DRIVEN PUMP HAD FAILED. REPLACED ENGINE PUMP BUT PROBLEM PERSISTED. EVENTUAL
- [SDR 2015FA0000154](https://openairdocs.org/sdr/2015FA0000154.md): Circuit Breaker · failed · Apr 23, 2015 · N8046G · Beech F33A · Exterior Lighting
  > PILOT REPORTED THAT THE TAXI LIGHT WAS INOP. THE TECHNICIAN TROUBLESHOT THE SYSTEM AND DISCOVERED THE TAXI LIGHT FAILED. THE TECHNICIAN REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR 2015FA0000155](https://openairdocs.org/sdr/2015FA0000155.md): Circuit Breaker · failed · Apr 3, 2015 · N8046G · Beech F33A · Exterior Lighting
  > PILOT REPORTED THAT THE LANDING LIGHT WAS INOP. THE TECHNICIAN TROUBLESHOT THE SYSTEM AND DISCOVERED THE LANDING LIGHT FAILED. THE TECHNICIAN REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR VJ3R2015FA0000107](https://openairdocs.org/sdr/VJ3R2015FA0000107.md): Fuel Control · malfunctioned · Mar 24, 2015 · N5582X · Beech F33A · Fuel Control/Reciprocating Engines
  > ON THE RUNWAY, THE ENGINE QUIT WHEN THE THROTTLE WAS ADVANCED. THE ENGINE WOULD NOT MAINTAIN A MIXTURE SETTING.
- [SDR 2015FA0000156](https://openairdocs.org/sdr/2015FA0000156.md): Circuit Breaker · failed · Mar 11, 2015 · N1564A · Beech F33A · Exterior Lighting
  > PILOT REPORTED THAT THE LANDING LIGHT WAS INOP. THE TECHNICIAN TROUBLESHOT THE SYSTEM AND DISCOVERED THE LANDING LIGHT FAILED. THE TECHNICIAN REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR VJ3R2015FA0000035](https://openairdocs.org/sdr/VJ3R2015FA0000035.md): Circuit Breaker · failed · Jan 27, 2015 · N5587K · Beech F33A · Exterior Lighting
  > PILOT REPORTED THAT THE TAXI LIGHT WAS INOPERATIVE. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE TAXI LIGHT FAILED. THE TECH REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR VJ3R2015FA0000036](https://openairdocs.org/sdr/VJ3R2015FA0000036.md): Circuit Breaker · failed · Jan 27, 2015 · N5587K · Beech F33A · Exterior Lighting
  > PILOT REPORTED THAT THE LANDING LIGHT CIRCUIT BREAKER SWITCH WAS NOT STAYING IN THE "ON" POSITION. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE LANDING LIGHT CIRCUIT BREAKER SWITCH FAILED. THE TECH REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR REC
- [SDR 2015FA0000023](https://openairdocs.org/sdr/2015FA0000023.md): Lock Nut · stripped · Jan 22, 2015 · N5585Y · Beech F33A · Mixture Control
  > SHORTLY AFTER TAKEOFF, HAD A REDUCTION IN FUEL FLOW, LANDED WITHOUT INCIDENT. UPON INSPECTION IT WAS NOTICED THAT THE RETAINING LOCKNUT FOR THE MIXTURE CONTROL LEVER HAD BACKED OFF THE LEVER CAUSING THE LEVER TO COME OUT OF RIG AND STRIP THE SPLINES OFF THE L
- [SDR VJ3R2014FA0000692](https://openairdocs.org/sdr/VJ3R2014FA0000692.md): Circuit Breaker · failed · Dec 9, 2014 · N5544A · Beech F33A · Light System Wiring
  > PILOT REPORTED THAT THE TAXI LIGHT WAS INOPERATIVE. TROUBLESHOT THE SYSTEM AND DISCOVERED THE TAXI LIGHT FAILED. REPLACED THE CIRCUIT BREAKER. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR 2014FA0000689](https://openairdocs.org/sdr/2014FA0000689.md): Circuit Breaker · failed · Dec 7, 2014 · N5521A · Beech F33A · Electrical Power System Wiring
  > PILOT REPORTED THAT THE ALTERNATOR DID NOT WORK. AFTER TROUBLESHOOTING IT WAS FOUND THAT THE ALTERNATOR CIRCUIT BREAKER FAILED. INSTALLED NEW CIRCUIT BREAKER AND ALTERNATOR WORKED NORMALLY. NO CAUSE OR RECOMMENDATIONS AT THIS TIME.
- [SDR VJ3R2014FA0000683](https://openairdocs.org/sdr/VJ3R2014FA0000683.md): Circuit Breaker · failed · Dec 1, 2014 · N8251C · Beech F33A · Light System Wiring
  > PILOT REPORTED THAT THE TAXI LIGHT WAS INOPERATIVE. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE TAXI LIGHT FAILED. THE TECH REPLACED THE CIRCUIT BREAKER. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR VJ3R2014FA0000663](https://openairdocs.org/sdr/VJ3R2014FA0000663.md): Circuit Breaker · failed · Nov 18, 2014 · N5521A · Beech F33A · Light System Wiring
  > PILOT REPORTED THAT THE LANDING LIGHT WAS INOPERATIVE. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE LANDING LIGHT FAILED. THE TECH REPLACED THE CIRCUIT BREAKER. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR VJ3R2014110500652](https://openairdocs.org/sdr/VJ3R2014110500652.md): Circuit Breaker · intermittent · Nov 5, 2014 · N5581T · Beech F33A · Exterior Lighting
  > PILOT REPORTED THAT THE LANDING LIGHT WAS INOPERATIVE. THE TECHNICIAN TROUBLESHOT THE SYSTEM AND DISCOVERED THE LANDING LIGHT WAS INTERMITTENTLY FAILING. THE TECHNICIAN REPLACED THE CIRCUIT BREAKER.
- [SDR 2014FA0000649](https://openairdocs.org/sdr/2014FA0000649.md): Circuit Breaker · failed · Oct 31, 2014 · N5582X · Beech F33A · Exterior Lighting
  > PILOT REPORTED BEACON LIGHT INOPERATIVE. TROUBLESHOT AND FOUND CIRCUIT BREAKER FAILED. REPLACED THE CIRCUIT BREAKER, OPS CHECKED GOOD.
- [SDR 2014FA0000635](https://openairdocs.org/sdr/2014FA0000635.md): Circuit Breaker · failed · Oct 27, 2014 · N5521A · Beech F33A · Exterior Lighting
  > PILOT REPORTED THAT THE STROBE LIGHT WAS INOPERATIVE. TROUBLESHOT THE SYSTEM AND DISCOVERED THE STROBE LIGHT FAILED. REPLACED THE CIRCUIT BREAKER.
- [SDR 2014FA0000633](https://openairdocs.org/sdr/2014FA0000633.md): Circuit Breaker · failed · Oct 24, 2014 · N5530A · Beech F33A · Exterior Lighting
  > PILOT REPORTED THAT THE NAVIGATION LIGHT WAS INOPERATIVE. TROUBLESHOT THE SYSTEM AND DISCOVERED THE NAVIGATION LIGHT FAILED. REPLACED THE CIRCUIT BREAKER.
- [SDR 2014FA0000616](https://openairdocs.org/sdr/2014FA0000616.md): Circuit Breaker · failed · Oct 22, 2014 · N8173C · Beech F33A · Exterior Lighting
  > PILOTS REPORTED THAT THE STROBE LIGHTS WERE NOT WORKING. FOUND STROBE LIGHT CIRCUIT BREAKER FAULTY. REPLACED THE CIRCUIT BREAKER.
- [SDR 2014FA0000617](https://openairdocs.org/sdr/2014FA0000617.md): Circuit Breaker · failed · Oct 22, 2014 · N5540P · Beech F33A · Electrical Power System Wiring
  > PILOT REPORTED THAT THE ALTERNATOR CIRCUIT BREAKER WAS INOPERATIVE. TROUBLESHOT THE SYSTEM AND DISCOVERED THE ALTERNATOR CIRCUIT BREAKER FAILED. REPLACED THE CIRCUIT BREAKER.
- [SDR VJ3R2014101300601](https://openairdocs.org/sdr/VJ3R2014101300601.md): Circuit Breaker · failed · Oct 13, 2014 · N5585Y · Beech F33A · Light System Wiring
  > PILOT REPORTED THAT THE NAV LIGHT WAS INOPERATIVE. THE TECHNICIAN TROUBLESHOT THE SYSTEM AND DISCOVERED THE NAV LIGHT FAILED. THE TECHNICIAN REPLACED THE NAV LIGHT CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR VJ3R2014101000596](https://openairdocs.org/sdr/VJ3R2014101000596.md): Circuit Breaker · failed · Oct 10, 2014 · N5599P · Beech F33A · Exterior Lighting
  > PILOT REPORTED THE LANDING LIGHT WAS INOPERATIVE. TROUBLESHOT AND FOUND THE LANDING LIGHT CIRCUIT BREAKER HOUSING BROKEN. REPLACED CIRCUIT BREAKER.
- [SDR KC2R2014100249404](https://openairdocs.org/sdr/KC2R2014100249404.md): Impulse Coupling · cracked · Oct 2, 2014 · N6233G · Beech A36 · Magneto/Distributor
  > DURING A 500 HOUR INSPECTION OF MAGNETO, A CRACK WAS DISCOVERED IN THE IMPULSE COUPLING BASE PLATE. CRACK ORIGINATES AT THE ADVANCE STOP NOTCH OF THE FLYWEIGHT BASE PLATE. CRACK DISCOVERED USING MAGNETIC PARTICLE INSPECTION NDT. IMPULSE REPLACED WITH NEW. H
- [SDR VJ3S2014FA0000563](https://openairdocs.org/sdr/VJ3S2014FA0000563.md): Circuit Breaker · failed · Sep 25, 2014 · N5519A · Beech F33A · Light System Wiring
  > PILOT REPORTED THAT THE STROBE LIGHT WAS INOPERATIVE. TROUBLESHOT THE SYSTEM AND DISCOVERED THE STROBE LIGHT FAILED. REPLACED THE CIRCUIT BREAKER.
- [SDR VJ3S2014FA0000499](https://openairdocs.org/sdr/VJ3S2014FA0000499.md): Circuit Breaker · failed · Aug 22, 2014 · N5530A · Beech F33A · Light System Wiring
  > PILOT REPORTED THAT THE LANDING LIGHT WAS INOPERATIVE. TROUBLESHOT THE SYSTEM AND DISCOVERED THE LANDING LIGHT FAILED. REPLACED THE CIRCUIT BREAKER.
- [SDR 2014FA0000475](https://openairdocs.org/sdr/2014FA0000475.md): Circuit Breaker · failed · Aug 11, 2014 · N5530A · Beech F33A · AC Power Distribution System
  > PILOT REPORTED ALTERNATOR INOPERATIVE. DURING TROUBLESHOOTING, FOUND THE CIRCUIT BREAKER AT FAULT. INSTALLED NEW CIRCUIT BREAKER, OPS CHECKED GOOD. CIRCUIT BREAKER THAT FAILED WAS INSTALLED TO COMPLY WITH AD 2008-13-17. ACFT HAS HAD THREE OF THE IMPROVED CI
- [SDR 2014FA0000476](https://openairdocs.org/sdr/2014FA0000476.md): Circuit Breaker · failed · Aug 11, 2014 · N1569P · Beech F33A · Light System Wiring
  > PILOT REPORTED THAT THE BEACON LIGHT WAS INOPERATIVE. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE BEACON LIGHT FAILED. THE TECHNICIAN REPLACED THE CIRCUIT BREAKER SWITCH. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR VJ3R2014FA0000462](https://openairdocs.org/sdr/VJ3R2014FA0000462.md): Circuit Breaker · failed · Aug 5, 2014 · N5519A · Beech F33A · Exterior Lighting
  > PILOT REPORTED THE NAVIGATION LIGHTS WERE NOT OPERATIONAL. AFTER TROUBLESHOOTING AIRCRAFT IT WAS FOUND THAT THE NAVIGATION LIGHTS CIRCUIT BREAKER WAS FAULTY. REPLACED THE CIRCUIT BREAKER AND OPS CHECKED NORMAL.
- [SDR 2014FA0000465](https://openairdocs.org/sdr/2014FA0000465.md): Circuit Breaker · failed · Aug 5, 2014 · N5521A · Beech F33A · Exterior Lighting
  > PILOT REPORTED THAT THE TAXI LIGHT WAS INOPERATIVE. THE TECH TROUBLESHOT THE SYSTEM AND DISCOVERED THE TAXI LIGHT FAILED. THE TECH REPLACED THE CIRCUIT BREAKER. NO CAUSE OR RECOMMENDATION AT THIS TIME.
- [SDR WS9R2014080400456](https://openairdocs.org/sdr/WS9R2014080400456.md): Armature · damaged · Jul 18, 2014 · N20651 · Beech A36 · Engine Starter
  > ENGINE WOULD NOT TURN OVER DURING START ATTEMPT. STARTER COULD BE HEARD TURNING. STARTER REMOVED AND DISASSEMBLED. ARMATURE COIL FOUND LOOSE AND SPINNING ON SPLINED SHAFT.

Next page: https://openairdocs.org/engine/continental-io-520-bb/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 engine_model_key = 'IO520BB'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/continental-io-520-bb/reports

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