# Service difficulty reports: Hoffman Tom A-1 A list on [Hoffman Tom A-1](https://openairdocs.org/model/hoffman-tom-a-1.md). Newest first. General aviation reporting is voluntary. - [SDR 2006FA0000058](https://openairdocs.org/sdr/2006FA0000058.md): Vent Line · blocked · Jan 2, 2006 · N9622V · Chris A1 · Hydraulic System, Main > BOTH LT FUEL VENT LINES BLOCKED BY ICE. ENGINE STOPPED DURING TAXI TO RUNWAY. ALTHOUGH PREFLIGHT LISTS CHECKING FUEL VENT LINES ARE CLEAR, THIS NEEDS TO BE EMPHASIZED MORE. (K) - [SDR 2005FA0001568](https://openairdocs.org/sdr/2005FA0001568.md): Vent Line · blocked · Dec 3, 2005 · N9622V · Chris A1 · Fuel Storage > ENGINE STOPPED DUE TO BLOCKED FUEL VENT LINE. THIS OCCURRED ON THE GROUND DURING TAXIING. NO DAMAGE TO PLANE. PROBABLE CAUSE WAS SNOW BUILD UP ON THE WING EXTENDING OVER THE ENDS OF THE VENT LINES FOLLOWED BY FREEZING. - [SDR 2005FA0001577](https://openairdocs.org/sdr/2005FA0001577.md): Vent Line · blocked · Dec 3, 2005 · N9622V · Chris A1 · Fuel Storage > ENGINE STOPPED DUE TO BLOCKED FUEL VENT LINE. THIS OCCURRED ON THE GROUND DURING TAXIING. NO DAMAGE TO PLANE. PROBABLE CAUSE WAS SNOW BUILD UP ON THE WING EXTENDING OVER THE ENDS OF THE VENT LINES FOLLOWED BY FREEZING. - [SDR 2005FA0000483](https://openairdocs.org/sdr/2005FA0000483.md): Attach Bracket · cracked · Jan 19, 2005 · N6RX · Chris A1 · Wing, Attach Fittings > DURING A ROUTINE ANNUAL INSPECTION DISCOVERED THE LEFT LOWER WING REAR SPAR ATTACHMENT AFT FITTING CRACKED. THIS INSPECTION IS REQUIRED EA 50 HOURS BY AD 96-12-03R2 AND MANUFACTURES SERVICE BULLETIN 25. SERVICE BULLETIN 25 INDICATES THE REPAIR PROCEDURE FOR - [SDR 2004FA0000009](https://openairdocs.org/sdr/2004FA0000009.md): Flying Wire · broken · Dec 12, 2003 · N2868M · Chris A1 · Wing Structure > UPPER LT FLYING WIRE TAIL BROKE ABOUT 6 INCHES FROM TOP ATTACH POINT. WHILE FLYING, FLAT TYPE WIRE. - [SDR 2002FA0001253](https://openairdocs.org/sdr/2002FA0001253.md): Indicator · contaminated · Sep 24, 2002 · N2950Q · Chris A1 · Airspeed/Mach Indicator > AFTER RAIN STORM, FOUND WATER IN THE AIRSPEED INDICATOR AND THE ALTERNATOR POSSIBLE CAUSE IS COMING THROUGH THE STATIC PORTS ON THE PITOT TUBE. - [SDR 20000817SH010](https://openairdocs.org/sdr/20000817SH010.md): Horn · misaligned · Jul 12, 2000 · N8XJ · Chris A1 · Elevator Control System > P/N 50025 (AN3-5) BOLT AND P/N 53875 (AN 1115-21), CLEVIS ATTACHED TO THE ELEVATOR TRIM HORN LINE, P/N 3-5274-001, CHAFED ON TAIL STRUCTURE TUBING. THE LINK SHOULD HAVE A JOGGLE BUILT IN TO DEFLECT THE TRIM CABLE INBOARD FOR CLEARANCE. ANTI-CHAFE TAPE WAS AP - [SDR CA990728041](https://openairdocs.org/sdr/CA990728041.md): Brace Strut · broken · Jul 15, 1999 · Chris A1 · Horizontal Stabilizer Structure > (CAN) FOUND LOWER END OF FORWARD LEFT TAIL BRACE TUBE BROKEN IN THREADED END FITTING. SERVICE BULLETIN NOTES A HISTORY OF FAILURE TO THE REAR STRUT AND OFFERED TO REPLACE ALL LOWER STRUTS. ONLY THE REAR STRUTS HAD BEEN CHANGED TO DATE. - [SDR 99ZZZX519](https://openairdocs.org/sdr/99ZZZX519.md): Tail Strut · broken · Jan 20, 1999 · N23HG · Chris A1 · Vertical Stabilizer > STAINLESS STEEL STRUT ASSEMBLY BROKEN AT THREADS LOWER TERMINAL, TIE ROD. - [SDR CA990119010](https://openairdocs.org/sdr/CA990119010.md): Battery · damaged · Jan 4, 1999 · Chris A1 · Emergency Locator Beacon > (CAN) AT RE-CERTIFICATION WHEN ELT OPENED THERE WERE TRACES OF ABRASION ON THE BATTERY JACKETS WHERE BATTERIES CONTACT EACH OTHER. SOME OF THE 'D' CELLS WERE DAMAGED TO THE POINT THAT THE NEGATIVE OR 'CAN' WAS EXPOSED AND COULD HAVE TOUCHED THE ADJACENT CELL - [SDR CA990203002](https://openairdocs.org/sdr/CA990203002.md): Flying Wire · broken · Dec 30, 1998 · Chris A1 · Wing Structure > (CAN) IN CRUISE,THE PILOT FELT THE NOW FAMILIAR THUMP OF A FLYING BREAKING. THIS IS THIRD TIME. HOWEVER, THIS TIME IT WAS THE UPPER RIGHT HAND WIRE. PILOT REPORTED THAT THE WIRE SEEMED A LITTLE TIGHTER DUE, HE THOUGHT, TO CONTRACTION OF STEEL IN COLD TEMPE - [SDR CA980916042](https://openairdocs.org/sdr/CA980916042.md): Flying Wire · broken · Aug 31, 1998 · Chris A1 · Wing Structure > (CAN) IN CRUISE, AIRCRAFT ON FLOATS, IN CALM AIR, THE PILOT FELT A THUMP IN THE CONTROL STICK AND A SUBSEQUENT VIBRATION. FLIGHT CONTINUED TO AN UNEVENTFUL LANDING. THE UPPER LEFT FLYING WIRE WAS FOUND TO HAVE SEPARATED 6 INCHES FROM THE LOWER END. NO CORRO - [SDR 98ZZZX2291](https://openairdocs.org/sdr/98ZZZX2291.md): Horn Link · bent · Jun 2, 1998 · N8XJ · Chris A1 · Aileron Tab Control System > THE P/N 50025 (AN3-5) BOLT AND THE P/N 53875 (AN1115-21) CLEVIS ATTACHED TO THE ELEVATOR TRIM HORN LINK P/N 3-5274-001 CHAFED ON THE TAIL STRUCTURE TUBING. THE LINK SHOULD HAVE A JOGGLE BUILT IN TO DEFLECT THE TRIM CABLE INBOARD FOR CLEARANCE. - [SDR 98ZZZX2136](https://openairdocs.org/sdr/98ZZZX2136.md): Brace · failed · May 23, 1998 · N9623Z · Chris A1 · Horizontal Stabilizer Structure > DURING AN ANNUAL INSPECTION, A RATTLING SOUND WAS DISCOVERED IN THE LEFT HORIZONTAL STABILIZER. FURTHER INVESTIGATION REVEALED THE TRACK WELD SECURING THE DIAGONAL BRACE TO THE BUTT RIB HAD BROKEN LOOSE DUE TO AN INADEQUATE WELD. THE DIAGONAL BRACE IS NOT A - [SDR 98ZZZX2149](https://openairdocs.org/sdr/98ZZZX2149.md): Control Cable · worn · May 12, 1998 · N9598C · Chris A1 · Aileron Control System > DURING A 100-HOUR INSPECTION, FOUND A SLIGHTLY FLAT SPOT ON THE RT AILERON CABLE ADJACENT TO THE MOST INBOARD FAIRLEAD ON THE WING STRUT. FURTHER INVESTIGATION AND WIPING CABLE CLEAN WITH A RAG REVEALED A BROKEN STRAND AND SEVERAL MORE SOON TO BREAK. CLOSE I - [SDR 98ZZZX2135](https://openairdocs.org/sdr/98ZZZX2135.md): Control Cable · chafed · May 12, 1998 · N9598C · Chris A1 · Aileron Control System > DURING A 100-HOUR INSPECTION, FOUND A SLIGHTLY FLAT SPOT ON THE RT AILERON CABLE ADJACENT TO THE MOST INBOARD FAIRLEAD ON THE WING STRUT. FURTHER INVESTIGATION AND WIPING CABLE CLEAN WITH A RAG REVEALED A BROKEN STRAND AND SEVERAL MORE SOON TO BREAK. CLOSE I - [SDR 97ZZZX5038](https://openairdocs.org/sdr/97ZZZX5038.md): Air Box · worn · Nov 12, 1997 · N29076 · Chris A1 · Engine Air Intake System > AIR INTAKE BOX SHAFT, ARM AND SLEEVE BUSHINGS FOUND BADLY WORN. APPEARS TO BE CAUSED BY ENGINE VIBRATION EVEN THOUGH PROPELLER WAS BALANCED AT 532.5 HRS TO.013 IPS. BOX BY DESIGN IS NOT REPAIRABLE DUE TO SHAFT WELDED TO PLATE. SUBMITTER RECOMMENDED BOX BE - [SDR 97ZZZX4554](https://openairdocs.org/sdr/97ZZZX4554.md): Hose · leak · Oct 8, 1997 · N2UJ · Chris A1 · Aircraft Fuel Distribution System > BOTH REAR FUEL LINE HOSES HAVE FAILED WITHIN A WEEK OF EACH OTHER. FUEL WAS FOUND SEEPING THROUGH THE OUTER COVERING OF HOSE. AEROQUIP NR 1525-6. - [SDR 97ZZZX498](https://openairdocs.org/sdr/97ZZZX498.md): Flap Arm · bolts incorrect · Dec 26, 1996 · N9622V · Chris A1 · Trailing Edge Flap Control System > FLAP CABLE ATTACH BOLTS AT WING BELLCRANK FOUND TO BE INSTALLED UPSIDE DOWN. IPC SHOWS BOLTS INSTALLED HEAD UP. NUT STRIKES ADJACENT RIB AT FLAPS DOWN POSITION. NO RECORD OF FLAP MAINTENANCE IN A/C RECORDS. - [SDR CA960802201](https://openairdocs.org/sdr/CA960802201.md): Tail Strut · broken · Jul 8, 1996 · Chris A1 · Vertical Stabilizer > (CAN) PILOT NOTICED VIBRATION FROM THE TAIL SECTION AND LANDED WITHOUT INCIDENT. INVESTIGATION FOUND A BROKEN STRUT WIRE AND REPLACED IT. THE FLYING WIRE BROKE AT THE THREADS APPROXIMATELY 1.250 INCHES FROM THE END. - [SDR 96ZZZX2872](https://openairdocs.org/sdr/96ZZZX2872.md): Screen · cracked · May 13, 1996 · N2908U · Chris A1 · Engine Air Intake System > MECHANIC REMOVED THE FILTER ELEMENT FOR NORMAL REPLACMENT DURING AN ANNUAL, HE NOTICED A 3.5 INCH CRACK RUNNING VERTICALLY IN THE ELEMENT RETAINING SCREEN. IF PIECES BROKE LOOSE, THEY WOULD BE INGESTED INTO THE CARBURETOR. THIS WAS A STEEL MESH SCREEN NOT CO - [SDR 96ZZZX1096](https://openairdocs.org/sdr/96ZZZX1096.md): Cylinder · outlet failed · Jan 31, 1996 · N2898D · Chris A1 · Master Cylinder/Brake Valve > AFTER LANDING, PILOT COMPLAINED OF NO LEFT BRAKE. INSPECTION REVEALED LEFT BRAKE MASTER CYLINDER OUTLET THREAD BOSS HAD SEPARATED FROM THE MASTER CYLINDER, DISCONNECTING THE LEFT BRAKE HOSE. - [SDR 95ZZZX1688](https://openairdocs.org/sdr/95ZZZX1688.md): Bearing · loose · Jan 26, 1995 · N2941W · Chris A1 · Magneto/Distributor > ROTATING MAGNET FOUND GRINDING AGAINST STATIONARY MAGNET DUE TO MAIN BALLBEARING COMING LOOSE. MAG TOTAL TIME 535.2 HRS. DESIGN OF MAG PROMOTES NON-INSPECTION AT REQUIRED 500-HOUR INTERVALS. SUBMITTER SUGGESTS THE INSPECTIONS SHOULD BE MANDATORY AS THESE MA ## 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 = 'A1' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/model/hoffman-tom-a-1/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.