# Service difficulty reports: Lycoming IO-720-A1B

A list on [Lycoming IO-720-A1B](https://openairdocs.org/engine/lycoming-io-720-a1b.md).

Newest first. General aviation reporting is voluntary.

- [SDR 2024F00317](https://openairdocs.org/sdr/2024F00317.md): Display · failed · Dec 10, 2024 · N306D · Beech 65B80 · Global Positioning System
  > GARMIN 600 PFD FAILED IN CRUISE FLIGHT
- [SDR BEMA202111170001](https://openairdocs.org/sdr/BEMA202111170001.md): Heater · odor · Nov 16, 2021 · N131BA · Beech 65B80 · Heating System
  > PILOT REPORTED SEEING A FLASH OF LIGHT AND A BURNING SMELL COMING FROM BELOW THE INTERMENT PANEL ON THE R/H SIDE BY THE RUDDER PEDDLES AREA. THE PILOT REPORTED AFTER TURNING THE COMBUSTION HEATER OFF THE PROBLEM WENT AWAY.
- [SDR BEMA20201028001](https://openairdocs.org/sdr/BEMA20201028001.md): Connecting Rod · broken · Oct 23, 2020 · N306D · Beech 65B80 · Reciprocating Engine Power Section
  > PILOT NOTICED ONSET OF SIGNIFICANT VIBRATION, FOLLOWED BY OIL PRESSURE LOSS. SHUT DOWN LT ENGINE ON FINAL AT KMSP. PILOT NOTIFIED MSP TOWER OF ENGINE FAILURE. ONCE ON GROUND UPON COWLING REMOVAL THERE WAS EVIDENCE THE PISTON ROD ON NR 8 CYLINDER HAD A ROD B
- [SDR BEMA202009230001](https://openairdocs.org/sdr/BEMA202009230001.md): Alternator · broken · Aug 24, 2020 · N5078N · Beech 65 · AC Generator-Alternator
  > RT ENGINE ALTERNATOR POWER SUPPLY STUD BROKE OFF RECTIFIER PLATE, AT THE PLATES 90 DEGREE BEND NEXT TO MADE IN CHINA STICKER. LOOKED LIKE CRACK STARTED FROM STRESS RISERS THAT FORMED IN THE BEND RADIUS OF THE RECTIFIER PLATE.
- [SDR BEMA20200618001](https://openairdocs.org/sdr/BEMA20200618001.md): Dme · failed · Jun 10, 2020 · N135BA · Beech 6580 · DME/TACAN System
  > PILOT REPORTED SMOKE IN COCKPIT AND MADE AN UNSCHEDULED LANDING SAFELY AT ALTERNATE AIRPORT. UPON INVESTIGATION IT WAS FOUND THAT THE DME HAD INTERNALLY FAILED AND BURNT THE CONNECTOR. THE DME IS NOT TRACKED BY TIME OR CYCLES. SO TIMES ARE UNKNOWN.
- [SDR BEMA2019072900001](https://openairdocs.org/sdr/BEMA2019072900001.md): Intake Valve · broken · Jul 23, 2019 · N131BA · Beech 65A80 · Reciprocating Engine Cylinder Section
  > THE #1 CYLINDER INDUCTION VALVE FAILED IN FLIGHT. THE PROBLEM WAS NOT DETECTED UNTIL THE PILOT DID HIE POST FLIGHT WALK AROUND. THE VALVE BROKE IN HALF AT THE NARROW SPOT WERE THE VALVE KEEPERS ARE. THE VALVE PART NUMBER IS 17A23937, AND CONTROL NUMBER FOR THE
- [SDR 2014FA0000328](https://openairdocs.org/sdr/2014FA0000328.md): Adapter · cracked · May 13, 2014 · N410RM · Piper PA36285 · Reciprocating Engine Oil System
  > OIL FILTER ADAPTER CRACKED ACROSS THE UPPER LT CORNER DURING FLIGHT, CAUSING LARGE LOSS OF OIL IN APPROX 10 MINUTES OF OPERATION. PART HAS NOT BEEN DISTURBED ON THE ENGINE SINCE THE ENGINE WAS REBUILT BY MFG 573 HRS AGO IN JULY OF 2011. THE ADAPTER IS ETCHED
- [SDR 2014FA0000082](https://openairdocs.org/sdr/2014FA0000082.md): Bushing · loose · Aug 12, 2012 · N410RM · Piper PA36285 · Magneto/Distributor
  > CENTER BUSHING OF DISTRIBUTOR BLOCK FOUND LOOSE IN THE PLASTIC OF THE DISTRIBUTOR BLOCK, ROTOR ARM WAS CONTACTING DISTRIBUTOR BLOCK BECAUSE OF THE BUSHING BEING LOOSE.
- [SDR 2012FA0000384](https://openairdocs.org/sdr/2012FA0000384.md): Governor · faulted · May 27, 2012 · N41NA · Beech A65 · Propeller Governor
  > ACFT WAS INSPECTED, ENGINE GROUND WAS CARRIED OUT BOTH ENGINE PERFORMANCE WAS GOOD. AT THE TIME OF FERRYING ACFT UNDER THE FERRY FLIGHT PERMIT WHEN ACFT FLEW AND CRUISE AT 10,000 FEET ALTITUDE. RT PROPELLER WAS NOT RESPONDING WITH THE THE PROPELLER LEVER MOVEM
- [SDR CA6R20110408003](https://openairdocs.org/sdr/CA6R20110408003.md): Governor · malfunctioned · May 27, 2012 · N41NA · Beech A65 · Propeller Governor
  > ACFT INSPECTED, ENGINE GROUND RUN CARRIED OUT, BOTH ENGINE PERFORMANCES WERE GOOD. ACFT TEST FLIGHT WAS CONDUCTED AND WAS GOOD. AT THE TIME OF FERRING THE ACFT, RT PROP RPM WAS NOT PROPERLY CONTROLLED IAW THE MOVEMENT OF THE PROP LEVER WHEN ACFT WAS FLYING A
- [SDR 2008FA0000468](https://openairdocs.org/sdr/2008FA0000468.md): Hinge · cracked · Jul 1, 2008 · N44MA · Beech 65B80 · Fuselage, Door Hinge
  > (2) OF THE HINGE LINKS HAD CRACKED OFF ON ONE END. UPON DISASSEMBLY IT WAS DETERMINED THAT A CRACK HAD FORMED LENGTHWISE BETWEEN THE FASTENERS AND THE HINGE LINKS. POSSIBLE CAUSE MAY HAVE BEEN FATIGUE. (K)
- [SDR 2006FA0001212](https://openairdocs.org/sdr/2006FA0001212.md): Bellcrank · cracked · Nov 22, 2006 · N44MA · Beech 65B80 · Elevator Structure
  > A CRACK WAS FOUND ON THE RT BELLCRANK SUPPORT ASSY. DURING A MANDITORY 5 YEAR INSPECTION IAW MSB 2231 REV 1. (K)
- [SDR ZES2006F00001](https://openairdocs.org/sdr/ZES2006F00001.md): Audio Panel · burned · Oct 11, 2006 · N44M · Cessna 680CE · Audio Integrating System
  > A SMELL OF SMOKE WAS DETECTED IN THE COCKPIT AND CABIN. PILOTS DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. (K)
- [SDR 2006F00012](https://openairdocs.org/sdr/2006F00012.md): Actuator · failed · Feb 14, 2006 · N55SA · Beech 65A80 · Landing Gear Actuator
  > PILOT SELECTED GEAR DOWN FOR LANDING AND HAD NO NOSE INDICATION. HE PERFORMED A LOW LEVEL PASS AND GROUND PERSONNEL DETERMINED THAT THE NOSE GEAR WAS NOT IN THE DOWN AND LOCKED POSITION. A GEAR UP LANDING WAS MADE WITH MINOR DAMAGE TO THE AIRCRAFT. FURTHER INS
- [SDR AU510001675](https://openairdocs.org/sdr/AU510001675.md): Bolt · sheared · Dec 12, 2005 · Newze FU24954 · Reciprocating Engine Power Section
  > (AUS) NR 2 CYLINDER CONNECTING ROD BIG END BOLT FAILED WITH OTHER BIG END BOLT BENT. NR 2 CYLINDER SEPARATED FROM CRANKCASE. (OTHER CAUSE: MATERIAL - HIGH HOURS) (CASA NR 510001675)
- [SDR AU510001770](https://openairdocs.org/sdr/AU510001770.md): Gasket · failed · Dec 12, 2005 · Beech 65B80 · Engine Oil Cooler
  > RT ENGINE OIL COOLER LOWER FITTING GASKET FAILED. LOSS OF ENGINE OIL.
- [SDR CVU2005F00003](https://openairdocs.org/sdr/CVU2005F00003.md): Shaft · sheared · Aug 18, 2005 · N46MA · Beech 65B80 · Pneumatic Distribution System
  > PUMP FAILED UNDER NORMAL OPERATING CONDITIONS (VFR, DAY).
- [SDR CVU2005F00001](https://openairdocs.org/sdr/CVU2005F00001.md): Camshaft · worn · Jul 15, 2005 · N44MA · Beech 65B80 · Reciprocating Engine Power Section
  > SMALL METAL FLAKES KEPT RE-APPEARING IN THE OIL SCREENS. FOUND WORN CAM NR 5 AND NR 6 CYLINDER INTAKE VALVES. ENGINES REMOVED FOR REPAIR. USE MFG ENGINE OIL ADDITIVE FROM TIME OF OVERHAUL. RUN ENGINES FREQUENTLY. (K)
- [SDR CVU2005F00002](https://openairdocs.org/sdr/CVU2005F00002.md): Lifter · worn · Jul 15, 2005 · N44MA · Beech 65B80 · Reciprocating Engine Power Section
  > SMALL METAL FLAKES KEPT RE-APPEARING IN THE OIL SCREENS. FOUND WORN CAM NR 5 AND NR 6 CYLINDER INTAKE VALVES. ENGINES REMOVED FOR REPAIR. USE MFG ENGINE OIL ADDITIVE FROM TIME OF OVERHAUL. RUN ENGINE FREQUENTLY. (K)
- [SDR CVU2005F00000](https://openairdocs.org/sdr/CVU2005F00000.md): Pump · failed · Nov 23, 2004 · N46MA · Beech 65B80 · Vacuum Distribution System
  > PUMP FAILED UNDER NORMAL OPERATING CONDITIONS. (VFR, DAY) (K)
- [SDR CVU2004F00000](https://openairdocs.org/sdr/CVU2004F00000.md): Pump · failed · Sep 23, 2004 · N44MA · Beech 65B80 · Vacuum Distribution System
  > VACUUM PUMP FAILED UNDER NORMAL OPERATING CONDITIONS. (VFR DAY)
- [SDR BEM2004F00000](https://openairdocs.org/sdr/BEM2004F00000.md): Bearing · failed · Jul 8, 2004 · N5078N · Beech 65 · DC Generating System
  > NR 1 ALTERNATOR WENT INOPERATIVE IN FLIGHT INVESTIGATION FOUND REAR ROTOR BEARING OF ALTERNATOR HAD NO GREASE AND FAILED.
- [SDR KZ52004F00000](https://openairdocs.org/sdr/KZ52004F00000.md): Valve · inoperative · May 6, 2004 · N50786 · Cessna 150J · Engine Oil Cooler
  > PILOT REPORTED HIGH OIL TEMP 210 DEGREES-220 DEGREES F., REMOVED VALVE AND TESTED SIDE BY SIDE WITH NEW VALVE, OLD VALVE DID NOT CLOSE AT THE SAME REATE AS NEW VALVE AND OIL TEMP DECREASED TO.
- [SDR 2004FA0000413](https://openairdocs.org/sdr/2004FA0000413.md): Valve · inoperative · May 6, 2004 · N50786 · Cessna 150J · Engine Oil Cooler
  > PILOT REPORTED HIGH OIL TEMPERATURE 220-225 DEGREES, REMOVED VALVE AND TESTED SIDE BY SIDE WITH NEW VALVE, OLD VALVE DID NOT CLOSE AT THE SAME RATE AS NEW VALVE, INSTALLED NEW VALVE AND OIL TEMP DECREASED TOO.
- [SDR AUS20040146](https://openairdocs.org/sdr/AUS20040146.md): Bolt · failed · Mar 1, 2004 · Fltchr FU24AAIRPTS · Fasteners
  > (AUS) RT MAIN LANDING GEAR TOP TORQUE LINK BOLT FAILED.
- [SDR AUS20040063](https://openairdocs.org/sdr/AUS20040063.md): Exhaust Valve · sticking · Jan 28, 2004 · Newze FU24954 · Reciprocating Engine Cylinder Section
  > (AUS) NR 2 CYLINDER REAR PUSHROD COVER BENT AND LEAKING OIL. SUSPECT CAUSED BY STICKING EXHAUST VALVE.
- [SDR CVU2003F00000](https://openairdocs.org/sdr/CVU2003F00000.md): Pump · failed · Sep 20, 2003 · N44MA · Beech 65B80 · Vacuum Distribution System
  > PUMP FAILED UNDER NORMAL OPERATING CONDITIONS (VFR DAY).
- [SDR AUS20030514](https://openairdocs.org/sdr/AUS20030514.md): Spacer · fractured · May 15, 2003 · Fltchr FU24AAIRPTS · Fuselage, Wing Attach Fittings
  > (AUS) WING TO FUSELAGE RT SPACER FRACTURED.
- [SDR AUS20030524](https://openairdocs.org/sdr/AUS20030524.md): Bearing · faulty · Apr 29, 2003 · Newze FU24954 · Reciprocating Engine Power Section
  > (AUS) REAR MAIN BEARING SURFACE SEPARATED FROM BEARING SHELL.
- [SDR 2003FA0000018](https://openairdocs.org/sdr/2003FA0000018.md): Main Bearing · failed · Dec 19, 2002 · Reciprocating Engine Power Section
  > AFTER TEST CELL RUN, ENGINE OIL WAS DRAINED AND THE SUCTION SCREEN AND FILTER WAS CHECKED. A ABNORMAL AMOUNT OF ALUMINUM WAS FOUND. UPON DISASSEMBLY, IT WAS FOUND THAT THE FRONT BEARING HAD FAILED AT THE NR 2 JOURNAL. THE METAL APPEARED TO HAVE DELAMINATED
- [SDR AUS20021409](https://openairdocs.org/sdr/AUS20021409.md): Fitting · cracked · Dec 2, 2002 · Piper PA36285 · Wing, Fuselage Attach Fittings
  > (AUS) LT WING ATTACHMENT FITTING CRACKED.
- [SDR KZ52002F00002](https://openairdocs.org/sdr/KZ52002F00002.md): Servo · failed · Aug 28, 2002 · N5078N · Beech 65 · Fuel Controlling System
  > PILOT REPORTED RT ENGINE TO BE LOW ON POWER, FOUND ENGINE TO BE RUNNING VERY RICH, WHICH CAUSED PLUGS TO FOUL, INSTALLED OVERHAULED FUEL SERVO AND CLEANED PLUGS, GROUND RUN AND TEST FLIGHT OK.
- [SDR KZ52002F00001](https://openairdocs.org/sdr/KZ52002F00001.md): Gear · broken · Aug 15, 2002 · N5078N · Beech 65 · Engine Starter
  > A NEW STARTER NEEDS TO BE DESIGNED. ENGINE DID NOT KICK BACK DURING START.
- [SDR AUS20021051](https://openairdocs.org/sdr/AUS20021051.md): Connecting Rod · failed · Jul 8, 2002 · Pac CT4A · Reciprocating Engine Power Section
  > (AUS) DURING AGRICULTURE OPERATIONS (SPREADING SUPER) THE PILOT ENCOUNTERED EXCESSIVE ENGINE VIBRATION AND A POSSIBLE OVERSPEED (WAS UNABLE TO READ GAUGES). ENGINE WAS SHUT DOWN AND A FORCED LANDING CARRIED OUT. INITIAL INVESTIGATION FOUND THAT NR 4 OR NR 6 C
- [SDR AUS20020418](https://openairdocs.org/sdr/AUS20020418.md): Bolt · broken · Apr 22, 2002 · Newze FU24A954 · Main Landing Gear Strut/Axle/Truck
  > (AUS) MAIN LANDING GEAR TORQUE LINK BOLT FAILED. LOWER HALF OF OLEO STRUT, TORQUE LINKS, AXLE AND WHEEL ASSEMBLY POPPED OUT AFTER TAKEOFF.
- [SDR AUS20020327](https://openairdocs.org/sdr/AUS20020327.md): Seal · leaking · Apr 5, 2002 · Newze FU24954 · Engine Fuel Pump
  > (AUS) ENGINE FUEL PUMP REAR SEAL LEAKING. FOUND DURING INSPECTION IAW AD/FSM/25.
- [SDR AUS20020102](https://openairdocs.org/sdr/AUS20020102.md): Pin · broken · Feb 3, 2002 · Newze FU24954 · Propeller Blade Section
  > (AUS) PROPELLER BLADE ACTUATING PIN BROKEN.
- [SDR AUS20020103](https://openairdocs.org/sdr/AUS20020103.md): Pin · broken · Feb 2, 2002 · Newze FU24954 · Propeller Blade Section
  > (AUS) PROPELLER BLADE PITCH ACTUATING PIN BROKEN.
- [SDR AUS20010773](https://openairdocs.org/sdr/AUS20010773.md): Gasket · faulty · Jul 23, 2001 · Fuel Divider
  > (AUS) FLOW DIVIDER GASKET FAULTY. NEW ITEM FROM MANUFACTURER.
- [SDR 2001FA0000142](https://openairdocs.org/sdr/2001FA0000142.md): Cylinder · broken · May 12, 2001 · Reciprocating Engine Cylinder Section
  > BARREL TO HEAD SEPERATION DURING FLIGHT.
- [SDR AUS20010528](https://openairdocs.org/sdr/AUS20010528.md): Pushrod · distorted · Apr 18, 2001 · Newze FU24954 · Reciprocating Engine Cylinder Section
  > (AUS) NR 7 CYLINDER EXHAUST VALVE PUSHROD BENT AND PUSHROD SHROUDDAMAGED CAUSING OIL LEAK. INVESTIGATION FOUND THE VALVE STEM CAP SEPARATED AND THE PISTON SUFFERING FROM SLIGHT IMPACT DAMAGE WITH THE EXHAUST VALVE. METAL CONTAMINATION OF OIL FILTER.
- [SDR AUS20010527](https://openairdocs.org/sdr/AUS20010527.md): Valve · worn · Apr 12, 2001 · Newze FU24954 · Reciprocating Engine Cylinder Section
  > (AUS) NO2 CYLINDER INLET VALVE DAMAGED IN THE COLLETT RECESS AREA.VALVE STEM CAP SEPARATED AND ONLY ONE COLLETT HALF WAS RETAININGTHE VALVE SPRING. METAL PARTICLES FROM THE DAMAGED VALVE WERE FOUND IN THE OIL FILTER AND PARTICLES OF THE MISSING COLLETT WERE FO
- [SDR 20010206CW006](https://openairdocs.org/sdr/20010206CW006.md): Exhaust Valve · broken · Jan 11, 2001 · N134BA · Beech 65A80 · Reciprocating Engine Cylinder Section
  > EXHAUST VALVE BROKEN IN HALF.
- [SDR AU001059](https://openairdocs.org/sdr/AU001059.md): Line · broken · Sep 30, 2000 · Newze FU24954 · Engine Fuel Distribution
  > (AUS) NR 2 AND NR 4 CYLINDER FUEL INJECTOR LINES PN LW-12098-0-170 AND PN LW-12098-0-240 BROKEN AT OR NEAR NIPPLE ON NOZZLE END OF LINE. (X)
- [SDR 20000720SH034](https://openairdocs.org/sdr/20000720SH034.md): Spring · cracked · Jun 26, 2000 · Beech 65B80 · Reciprocating Engine Cylinder Section
  > EXHAUST VALVE SPRING RETAINING CAP BROKE IN HALF AND BURNED EXHAUST VALVE. (X)
- [SDR 98ZZZX2598](https://openairdocs.org/sdr/98ZZZX2598.md): Stud · failed · Jun 11, 1998 · N103BA · Beech 65B80 · Reciprocating Engine Power Section
  > CYLINDER HOLD DOWN STUD BROKE UNDER NUT. SUSPECT DEFECTIVE STUD.
- [SDR AU970669](https://openairdocs.org/sdr/AU970669.md): Crankcase · worn · Jun 16, 1997 · Reciprocating Engine Power Section
  > (AUS) CRANKCASE FRETTING IN AREA OF CRANKCASE THROUGH BOLTS
- [SDR AU960896](https://openairdocs.org/sdr/AU960896.md): Clamp · faulty · Jun 27, 1996 · Beech 65B80 · Propeller Assembly
  > (AUS) PROPELLER CLAMP FAULTY - CLAMP APPEARS TO HAVE FORGING FLAW - SUSPECT MANUFACTURING FAULT
- [SDR AU960021](https://openairdocs.org/sdr/AU960021.md): Nozzle · failed · Jan 9, 1996 · Piper PA36285 · Reciprocating Engine Oil System
  > (AUS) ENGINE OIL SYSTEM CONTAMINATED BY METAL - NO3 CYLINDER OIL SQUIRT NOZZLE MISSING - THE NOZZLE BALL WAS FOUND IN THE CRANKCASE ANDTHE REMAINDER OF THE NOZZLE WAS FOUND IN THE SUMP FOLLOWING REMOVAL - INVESTIGATION FOUND THAT THE NOZZLE HAD BEEN CRUSHED B
- [SDR 95ZZZX3462](https://openairdocs.org/sdr/95ZZZX3462.md): Crankcase · cracked · Jun 15, 1995 · N269JW · Piper PA36285 · Reciprocating Engine Power Section
  > WHILE ASSISTING THE OWNER/OPERATOR WITH A PREVENTIVE MAINTENANCE OPERATION, A CRACK WAS DISCOVERED ON THE FRONT SIDE OF THE NR 1 CYLINDER MOUNT PAD AREA. THE CRACK, ALTHOUGH CLEARLY VISIBLE, WAS CONFIRMED WITH DYE PENETRANT. THE CRACK DID NOT APPEAR TO BE LE

## 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 = 'IO720A1B'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/lycoming-io-720-a1b/reports

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