# Service difficulty reports: JASC 8540

A list on [JASC 8540](https://openairdocs.org/jasc/8540.md).

Reports filed under 8540 · Reciprocating Engine Rear Section, newest first.

Page 1 of 4 · 167 reports

- [SDR 2022FA0000165](https://openairdocs.org/sdr/2022FA0000165.md): Drive Shaft · cracked · Mar 23, 2022 · N75MG · Cirrus SR22
  > LH MAGNETO DRIVE SHAFT FOUND CRACKED 3/4 OF THE LENGTH OF THE DRIVE SHAFT. THIS MAGNETO DRIVE OPERATES THE AFTER MARKET SUPERCHARGER FROM FORCED AEROMOTIVE.
- [SDR JU8S20210420255](https://openairdocs.org/sdr/JU8S20210420255.md): Impulse Coupling · loose · Apr 14, 2021 · N533KS · Cessna 172S
  > THIS ISSUE RELATES SPECIFICALLY TO THE CHAMPION MAGNETO IMPULSE COUPLING PART NUMBER M3163 INSTALLED IN THE CHAMPION PART NUMBER 4371 MAGNETOS. ON 10-14-2019, REVISED 02-14-2020 CHAMPION ISSUED SB2-19A WHICH DEALS WITH IMPULSE COUPLING RIVETS LOOSENING IN SER
- [SDR 2020FA0000307](https://openairdocs.org/sdr/2020FA0000307.md): Drive Gear · cracked · Jun 16, 2020 · N6911Q · Piper PA28236
  > DURING ROUTINE 100 HOUR INSPECTION THE MAGNETO WAS REMOVED FOR 500 HOUR SERVICE AND INSPECTION. SINCE THE MAGNETO WAS OUT OF THE WAY AND INSPECTION OF THE MAGNETO DRIVE CUSHIONS WAS REQUIRED, THE GEAR WAS REMOVED FROM THE ENGINE. ONCE THE CUSHIONS WERE REMOVED
- [SDR CA180925012](https://openairdocs.org/sdr/CA180925012.md): Support · loose · Sep 22, 2018 · Cessna 421B
  > (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 CA151007022](https://openairdocs.org/sdr/CA151007022.md): Gearbox · making metal · Oct 1, 2015 · Diamon DA42
  > (CAN) UNCOMMANDED POWER LOSS IN DEPARTURE LEG OF FLIGHT. PILOT REDUCED POWER TO 55% BUT NOTICED IT ACTUALLY REDUCED TO 35%. PROPELLER RPM DROPPED, ALTHOUGH DROP NOT RECORDED. PILOT CONTINUED FLIGHT TO A FULL STOP LANDING AT DEPARTURE AIRPORT. PILOT PROCEEDED T
- [SDR CA111206006](https://openairdocs.org/sdr/CA111206006.md): Bevel Gear · deformed · Nov 30, 2011
  > (CAN) THIS PN 640802, GEAR WAS PURCHASED NEW FROM THE OEM. IT WAS RECEIVED IN ORIGINAL TCM PACKAGING. DURING ASSY OF THE ACCESSORY DRIVE ADAPTER, THE NEW PN 640802 GEAR WAS FOUND TO HAVE 6 MISFORMED TEETH. MACHINING OF THESE 6 GEAR TEETH APPEARS TO BE INCOM
- [SDR 2011FA0000600](https://openairdocs.org/sdr/2011FA0000600.md): Bushing · defective · Sep 16, 2011 · N94669 · Cessna 182Q
  > DEFECTIVE MAGENTO DRIVE BUSHINGS INSTALLED AT ENGINE O/H. CONTINUE HIS VFR FLIGHT BACK TO WHERE THE ACFT IS BASED. UPON REMOVAL OF THE VACUUM PUMP IT WAS NOTED THAT THE DRIVE SHAFT HAD MELTED/BURNED AWAY. REMOVED ACCESSORY DRIVE PAD AND NOTED THAT THE ACCES
- [SDR CA110718001](https://openairdocs.org/sdr/CA110718001.md): Valve Seat · missing · Jul 7, 2011 · Diamon DA20C1
  > ACFT WAS SNAGGED FOR LOW OIL PRESSURE, AFTER INSPECTION, NOTICED THAT THERE WAS A SMALL CHIP ON THE OIL PRESSURE RELIEF VALVE SEAT THAT WAS MISSING. O/H REAR ACCESSORY CASE WAS INSTALLED AND OIL PRESSURE FOUND TO BE WITHIN MFG LIMITS.
- [SDR FXTA20110405005](https://openairdocs.org/sdr/FXTA20110405005.md): Mount · cracked · Jun 4, 2010 · N141ME · Piper PA31350
  > WHILE PERFORMING AN ENGINE INSPECTION TECHNICIAN DISCOVERED THE RT LOWER ENGINE/TURBO MOUNT BOLT LOOSE. AFTER REMOVING THE BOLT IT WAS DISCOVERED THE TURBO MOUNT BOSS CRACKED AND BROKEN IN SEVERAL PIECES.
- [SDR 2009FA0000392](https://openairdocs.org/sdr/2009FA0000392.md): Flange · warped · May 11, 2009 · N9456B · Cessna 175
  > WHILE LOOKING FOR THE SOURCE OF AN OIL LEAK FOUND THE TACHOMETER DRIVE ADAPTER HOUSING FLANGE WARPED AND CRACKED.
- [SDR 2007FA0000820](https://openairdocs.org/sdr/2007FA0000820.md): Bearing · destroyed · Sep 24, 2007 · N5147L · Piper PA28180
  > BEARING LW14227 CAGE DESTROYED AND APPROXIMATELY 50 PERCENT MISSING. THIS IS THE ENGINE SIDE BEARING OF THE LW15416 MAGNETO DRIVE ADAPTER (MAGNETO ISOLATION DRIVE FOR RIGHT HAND MAGNETO). ENGINE HAS 857 HOURS SINCE FACTORY OVERHAUL IN 2000.
- [SDR 2007FA0000183](https://openairdocs.org/sdr/2007FA0000183.md): Gear · loose · Feb 11, 2007 · N242SP · Cessna 172S
  > DURING TAKEOFF AT 400 FT AGL ENGINE QUIT FORCING AN OFF AIRPORT EMERGENCY LANDING. INITIAL INSPECTION FOUND NO MOVEMENT OF ACCESSORIES AND VALVE MOVEMENT. REMOVED ACCESSORIES CASE AND FOUND DRIVE GEAR ON CRANKSHAFT MOUNT BOLT LOOSE AND PIN SHEARED. MARKS SH
- [SDR 2007FA0000058](https://openairdocs.org/sdr/2007FA0000058.md): Gearshaft · seized · Jan 5, 2007 · N423FP · Diamon DA40
  > REMOVED VACUUM DRIVE ASSEMBLY AND FOUND DRIVE GEAR SHAFT SEIZED AND (3) TEETH BROKEN OFF OF DRIVE GEAR. FURTHER INSPECTION REVEALED NO LUBRICATION PORT FOR PRESSURIZED ENGINE OIL TO LUBRICATE THE DRIVE GEAR SHAFT. ALL (3) TEETH WER FOUND IN THE OIL PUMP INLE
- [SDR 2006FA0000675](https://openairdocs.org/sdr/2006FA0000675.md): Bushing · spun · Jul 3, 2006 · N3860H · Mooney M20J
  > FOUND DURING ANNUAL INSP, AN ALUMINUM BUSHING THAT IS LOCATED IN ACCESSORY CASE, WHERE MAGNETO DRIVE GEAR IS LOCATED HAD BECOME LOOSE IN CASE AND SPUN. FOUND THIS PROBLEM, WERE NOT ABLE TO INSTALL MAGNETO CORRECTLY, WHEN MAGNETO WAS INSTALLED, IMPULSE COUPL
- [SDR NACA20060039](https://openairdocs.org/sdr/NACA20060039.md): Case · separated · Jun 3, 2006 · N2907F · Doug DC6
  > NR 1 ENGINE SHUT DOWN DUE TO OIL LOSS, QUANTITY AND PRESSURE. REPLACED NR 1 ENGINE DUE TO COLLECTOR CASE TO INTERMEDIATE REAR CASE SEPARATION PER NAC DC-6MM SEC V PG 1-9.
- [SDR 2007FA0000212](https://openairdocs.org/sdr/2007FA0000212.md): Sump · leaking · Dec 21, 2005 · N8848Z · Cessna 172H
  > DURING NEWLY OVERHAULED ENGINE INSTALLATION AN OIL LEAK WAS DISCOVERED. WHEN BREAK-IN OIL WAS ADDED TO OIL SUMP FOR INITIAL ENGINE RUN, OIL WAS OBSERVED LEAKING ONTO NOSE TIRE. FURTHER EXAMINATION REVEALED OIL LEAK WAS ORIGINATING FROM LEFT REAR OF ENGINE WH
- [SDR AU510002007](https://openairdocs.org/sdr/AU510002007.md): Drive Shaft · failed · Dec 12, 2005 · Beech 58
  > CSU DRIVE ASSEMBLY FAILED. INVESTIGATION CONTINUING.
- [SDR 05308](https://openairdocs.org/sdr/05308.md): Seal · leaking · Nov 4, 2005 · N9621V · Cessna 172M
  > DURING 100 HOUR INSPECTION, FOUND ENGINE VACUUM PUMP DRIVE LEAKING OIL AND CONTAMINATING VACUUM PUMP. REMOVED VACUUM PUMP AND ENGINE VACUUM PUMP ADAPTOR DRIVE ASSEMBLY. FOUND SEAL P/N STD-1774 NOT FULLY INSTALLED IN DRIVE ASSY. REPLACED SEAL AND VACUUM PUMP,
- [SDR AU510001781](https://openairdocs.org/sdr/AU510001781.md): Spring · broken · Apr 7, 2005 · Cessna U206G
  > ENGINE STARTER ADAPTER SPRING END TANG BROKEN OFF.
- [SDR CA050222011](https://openairdocs.org/sdr/CA050222011.md): Bolt · broken · Feb 22, 2005
  > (CAN) UPON INSPECTION OF THE ENGINE DURING A SCHEDULED B-CHECK, ONE OF THE BOLTS HOLDING THE POWERCASE AND REAR ACCESSORY CASE TOGETHER WAS FOUND MIGRATING OUT OF THE POWERCASE BETWEEN CYLINDER NR4 AND NR5. ENGINE WAS REMOVED FOR REPAIR BY OVERHAUL SHOP.
- [SDR 2005FA0000144](https://openairdocs.org/sdr/2005FA0000144.md): Gear Shaft · broken · Aug 14, 2004
  > AT AIRCRAFT 100 HOUR ENGINE WAS FOUND WITH TIGHT SPOT. REMOVED ENGINE ACCYS AND FOUND GOVERNOR SHAFT NOT TURNING DISASSEMBLED ENGINE. FOUND GOVERNOR IDLER GEAR SHAFT (PN 70384) BROKEN IN 3 PARTS; ALL GOV GEARS HAD RG TEETH, 1 OF 2 KNOWN FAILURES, ON SHAFT (
- [SDR 2004FA0000764](https://openairdocs.org/sdr/2004FA0000764.md): Bushing · obstructed · Jul 2, 2004 · N915X · Scwzer G164A
  > ENGINE LOST POWER ON TAKE-OFF. PILOT LANDED IN BOG AND FLIPPED OVER. PRELIMINARY INSPECTION SHOWED DAMAGE TO INDUCTION IMPELLER. TEARDOWN REVEALED IMPELLER SHAFT SUPPORTED BY TWO BRONZE BUSHINGS WHICH ARE LUBRICATED BY AN.1250 INCH HOLE ON BOTH BUSHINGS AN
- [SDR AUS20031062](https://openairdocs.org/sdr/AUS20031062.md): Seal · damaged · Oct 20, 2003 · Piper PA31
  > (AUS) LT ENGINE HYDRAULIC PUMP DRIVESHAFT SEAL DAMAGED AND LEAKING. HYDRAULIC PUMP HAD BEEN CHANGED ON THE PREVIOUS DAY.
- [SDR AUS20031054](https://openairdocs.org/sdr/AUS20031054.md): Bushing · separated · Sep 24, 2003 · Piper PA31350
  > (AUS) GOVERNOR IDLE SHAFT BUSHING BROKEN AWAY AND ENTERED ENGINE LUBRICATION SYSTEM CAUSING METAL CONTAMINATION.
- [SDR 2003FA0001216](https://openairdocs.org/sdr/2003FA0001216.md): Gear · worn · Sep 23, 2003 · N7150E · Cessna 182B
  > TEETH TOO SHALLOW, TOOTH DEPTH WAS 0.152, NORMAL.0.180 TO 0.185.
- [SDR AUS20031059](https://openairdocs.org/sdr/AUS20031059.md): Gear · wrong part · Aug 28, 2003 · Bnorm BN2A8
  > (AUS) CRANKSHAFT GEAR INCORRECT PART. GEAR WAS NOT COMPLETELY MESHING WITH THE OIL PUMP DRIVE GEAR. PN 13S19648 FITTED INSTEAD OF CORRECT PN 13S19647. SUSPECT ENGINE HAD BEEN CONVERTED FROM EITHER AN IO-540 OR TSIO-540 MODEL, BOTH OF WHICH USED THE FITTED GEAR
- [SDR AUS20030891](https://openairdocs.org/sdr/AUS20030891.md): Spacer · worn · Aug 13, 2003 · Amtr RV8
  > (AUS) ENGINE OIL FILTER CONTAMINATED WITH BRONZE PARTICLES. INVESTIGATION FOUND THE TACHOMETER DRIVESHAFT SPACER HAD COME LOOSE FROM THE CAMSHAFT AND WAS WEARING ON THE SHAFT ROLL PIN.
- [SDR J792003F00000](https://openairdocs.org/sdr/J792003F00000.md): Seal · worn · Jun 3, 2003 · N95KM · Beech 58
  > DURING 100 HOUR INSPECTION, FOUND RT ENGINE PNEUMATIC PUMP COUPLING OILY. FURTHER INVESTIGATION REVEALED DRIVE SHAFT ADAPTER SEAL LEAKING OIL INTO PUMP COUPLING AND INTO PUMP. REPLACED SEAL (PN 25102) AND PRESSURE PUMP (442CW-12). SYSTEM OPS CHECK OK. REC
- [SDR 2002FA0001032](https://openairdocs.org/sdr/2002FA0001032.md): Collar · mismanufactured · Sep 3, 2002
  > AT INSTALLATION OF A NEW GOVERNOR OIL TRANSFER COLLAR IT WAS DISCOVERED THAT THE ASSEMBLY HALVES WERE IRREGULAR AT THE PARTING SURFACE. THE INSIDE DIAMETER LOOKED SMOOTH AND REGULAR WHEN REMOVED FROM THE PACKAGE. ONCE DISASSEMBLED AND REASSEMBLED AND TORQUED
- [SDR 2002FA0001030](https://openairdocs.org/sdr/2002FA0001030.md): Gear · damaged · Aug 29, 2002 · N5119X · Cessna TU206G
  > DURING PRE-FLIGHT INSPECTION PROPELLER WAS ROTATED BACKWARDS BY HAND TO CHECK COMPRESSION OF CYLINDERS. PROPELLER PHYSICALLY STOPPED BY SOMETHING INTERNAL IN ENGINE. AFTER INSPECTION BY REMOVING THE STARTER ADAPTER ASSEMBLY, THE CRANKSHAFT GEAR WAS FOUND TO
- [SDR AUS20021235](https://openairdocs.org/sdr/AUS20021235.md): Gasket · damaged · Aug 8, 2002 · Cessna 152
  > (AUS) ENGINE FUEL PUMP/BLANK PLATE GASKET CUT BY LOCKWIRE WRAPPED AROUND THE TWO MOUNTING BOLTS. GASKET LEAKING ENGINE OIL. ENGINEWAS FITTED WITH A BLANKING PLATE AND NOT A FUEL PUMP. ENGINE WASA RECENTLY OVERHAULED AND FITTED UNIT. PERSONNEL/MAINTENANCEERROR.
- [SDR 2002FA0000807](https://openairdocs.org/sdr/2002FA0000807.md): Drive Gear · seized · Jun 18, 2002 · N8154J · Piper PA44180
  > MAGNETO DRIVE GEAR WAS SEIZED TO CRANKCASE BUSHING WHICH WAS SPINNING IN ITS CRANKCASE BORE. THIS ENGINE HAD ONLY 219 HOURS SINCE FACTORY REMANUFACTURE. THE OPPOSITE ENGINE WHICH ALSO HAD 219 HOURS SINCE FACTORY REMANUFACTURE EXHIBITED THE EXACT SAME PROBLEM
- [SDR AUS20020789](https://openairdocs.org/sdr/AUS20020789.md): Screw · failed · Jun 14, 2002 · Hiller UH12E
  > (AUS) ENGINE ACCESSORY DRIVE GEAR PNO 67609 TO STARTER DRIVE GEAR PNO 67583 ATTACHMENT STUDS (6OFF) PNO STD-2208 AND DOWELS (3OFF) PNO72139 SHEARED.
- [SDR CA020611006](https://openairdocs.org/sdr/CA020611006.md): Bevel Gear · failed · Jun 3, 2002 · Cessna 337G
  > (CAN) - VACUUM PUMP DRIVE NOT TURNING.- INSPECTION REVEALS NO TEETH ON DRIVE BEVEL GEAR.- METAL CONTAMINANTS CONTAINED INSIDE STARTER ADAPTER.- TCM SB 01-5 ADDRESSES PROBLEM.- TCM WARRANTS FULL REPLACEMENT.
- [SDR CA021003008](https://openairdocs.org/sdr/CA021003008.md): Nut · loose · May 1, 2002 · Scwzer 269D
  > (CAN) DAILY INSPECTION REVEALED CLUTCH OIL ON BELT DRIVE ASSEMBLY, STATIC LEAK. INVESTIGATION REVEALED LT THREAD NUT/SEAL RUNNER WAS LOOSE.
- [SDR 2002FA0000463](https://openairdocs.org/sdr/2002FA0000463.md): Shaft · failed · Apr 10, 2002 · N29TC · Beech A36
  > AIRCRAFT ENGINE EXPERIENCED A LOSS OF OIL PRESSURE AND SUBSEQUENT LOSS OF POWER. ENGINE TEARDOWN INSPECTION REVEALED A FAILURE OF THE STARTER ADAPTER SHAFT.
- [SDR CA020307010](https://openairdocs.org/sdr/CA020307010.md): Casting · corroded · Mar 4, 2002 · Cessna 150L
  > (CAN) WHILE REMOVING COMPONENTS OFF OF THE ACCESORIE CASE, (UN RELATED REPAIR) DISCOVERED VER DEEP PITTING AND CORROSSION AROUND THE RIGHT MAGNETO OPENING.CASTING WAS REPLACED.
- [SDR AUS20020169](https://openairdocs.org/sdr/AUS20020169.md): Shaft · broken · Feb 22, 2002 · Cessna 404CESSNA
  > (AUS) STARTER SHAFT AND CRANKSHAFT GEAR HAD SEVERAL MISSING TEETH.
- [SDR AUS20020170](https://openairdocs.org/sdr/AUS20020170.md): Bearing · failed · Feb 18, 2002 · Cessna 404CESSNA
  > (AUS) STARTER SHAFT BEARING BROKEN UP. BEARING DEBRIS LOCATED IN SUMP.CRANKCASE DAMAGED IN AREA OF BEARING SUPPORT. STARTER SHAFT AND CRANK GEARS EXHIBITED DEFORMATION OF PROFILE. THE ENGINE WASFITTED WITH PNO EQ6642 ADAPTER KIT AS PER AD/CON/71.
- [SDR XGN2002F00000](https://openairdocs.org/sdr/XGN2002F00000.md): Crankcase · cracked · Dec 31, 2001 · N69RP · Beech D55
  > HALF CIRCLE CRACKED AT NR 6 CYLINDER PAD. CRACK RUNS FROM UPPER PART OF CRANKCASE FROM CYLINDER BASE STUD AT 2 OCLOCK POSITION TO CYLINDER BASE STUD AT 10 OCLOCK POSITION. WITH SEVERAL CRACK RADIATING FROM THE HALF CIRCLE CAUSING A SMALL TRIANGULAR PIECE TO
- [SDR LQU2002F00000](https://openairdocs.org/sdr/LQU2002F00000.md): Pin · missing · Dec 1, 2001 · N799 · Cessna 421B
  > RIGHT ENGINE RAN ROUGH AND VIBRATED BADLY IN FLIGHT, SHUT DOWN. VISUAL INSPECTION FOUND OPEN HOLE IN BACK OF CRANKCASE. IDLER GEAR SUPPORT PIN MISSING. FOUND PIN ON ENGINE NACELLE FLOOR UNDER ENGINE. NO VISUAL DAMAGE NOTED TO PIN. ENGINE NEEDS PIN TO HOLD
- [SDR YWB2001F00001](https://openairdocs.org/sdr/YWB2001F00001.md): Adapter · failed · Sep 24, 2001 · N876AN · Beech 58
  > DURING ROUTINE INSPECTION FOUND METAL (STEEL) IN FILTER. REMOVED STARTER ADAPTER AND FOUND SHAFT GEAR NEEDLE BEARING PN 630890 IN ENGINE CASE HAD FAILED. NEEDLES FROM FAILED BEARING HAD ALSO DAMAGED CRANKSHAFT AND IDLER GEARS. SOME DAMAGE DONE TO ENGINE CAS
- [SDR 2001FA0000230](https://openairdocs.org/sdr/2001FA0000230.md): Bevel Gear · failed · Aug 29, 2001 · N51WM · Cessna 337D
  > TROUBLESHOT LOSS OF VACUUM ON REAR ENGINE AND DETERMINE ACCESSORY DRIVE ASSEMBLY GEAR BOX FOR VACUUM PUMP AND HYDRAULIC PUMP INOPERABLE. REMOVE AND DISASSEMBLED GEAR BOX AND FOUND BEVEL GEAR PN 632617 STRIPPED OF ALL GEAR TEETH. ENGINE HAD BEEN RECENTLY OVER
- [SDR 2001FA0000177](https://openairdocs.org/sdr/2001FA0000177.md): Gear · broken · Jul 13, 2001 · N3556F · Piper PA31350
  > ONE TOOTH ON GEAR SEPARATED AND LODGED BETWEEN CRANKSHAFT GEAR AND OIL PUMP HOUSING. THIS CAUSED THE REMAINING TEETH OF THE CRANKSHAFT GEAR TO ROUND OFF AND DISENGAGE FROM THE OTHER GEARS. THIS ALSO CAUSED 2 IDLER GEARS AND THE OIL PUMP DRIVE GEAR TO SHEAR S
- [SDR AUS20010648](https://openairdocs.org/sdr/AUS20010648.md): Gear · failed · May 31, 2001 · Hiller UH12E
  > (AUS) ENGINE DRIVE GEAR PNO 67583 HAD SHEARED ALL THE BOLTS ATTACHING IT TO ACCESSORY DRIVE PNO 67609.
- [SDR 20010613CW005](https://openairdocs.org/sdr/20010613CW005.md): Drive Shaft · seized · Apr 13, 2001 · N6794D · Cessna 421C
  > AT 25 HR OIL CHANGE, INTERVAL OIL WAS FOUND VENTING OUT RIGHT ENGINE OVERBOARD DRAIN AND OIL DRAINED FROM ENGINE HAD METALLIC GLIMMER TO IT, ALTHOUGH CUTTING THE OIL FILTER DID NOT REVEAL ANY UNUSUAL AMOUNT OF METAL. OIL VENTING WAS TRACED TO ENGINE DRIVEN HY
- [SDR 20010613CW004](https://openairdocs.org/sdr/20010613CW004.md): Bearing · seized · Apr 13, 2001 · N6794D · Cessna 421C
  > AT 25 HR OIL CHANGE, INTERVAL OIL WAS FOUND VENTING OUT THE RIGHT ENGINE OVERBOARD DRAIN AND THE OIL DRAINED FROM THE ENGINE HAD A METALLIC GLIMMER TO IT, ALTHOUGH CUTTING THE OIL FILTER DID NOT REVEAL ANY UNUSUAL AMOUNT OF METAL. OIL VENTING WAS TRACED TO
- [SDR CA010301035](https://openairdocs.org/sdr/CA010301035.md): Idler Gear · worn · Feb 16, 2001 · Piper PA31350
  > (CAN) THE IDLER GEAR BETWEEN THE CRANKSHAFT AND THE CAMSHAFT GEAR DISENGAGED DUE TO FRACTURING OF THE CRANKCASE AND ACCESSORY CASE. THESE FRACTURES ARE DIRECTLY OPPOSITE THE CRAN GEAR AND WOULD INDICATE THAT A SOLID OBJECT WENT IN BETWEEN THE CRANK GEAR AND ID
- [SDR AU001135](https://openairdocs.org/sdr/AU001135.md): Shaft · failed · Nov 27, 2000 · Cessna 404CESSNA
  > (AUS) LT ENGINE STARTER ADAPTER GEAR SHAFT SHEARED IN AN AREA 16MM(0.629IN) FROM THE PILOT BEARING END OF THE SHAFT.
- [SDR AU001098](https://openairdocs.org/sdr/AU001098.md): Gear · failed · Nov 21, 2000 · Cessna 337G
  > (AUS) VACUUM PUMP DRIVE GEAR FAILED. (X)

Next page: https://openairdocs.org/jasc/8540/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 jasc_code = '8540'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/jasc/8540/reports

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