# Service difficulty reports: Sikorsky CH-54B A list on [Sikorsky CH-54B](https://openairdocs.org/model/sikorsky-ch-54b.md). Newest first. General aviation reporting is voluntary. - [SDR CA150511015](https://openairdocs.org/sdr/CA150511015.md): Solenoid · defective · May 9, 2015 · Skrsky CH54B · Aerial Tow Equipment > (CAN) UNCOMMANDED INADVERTENT RELEASE OF LOWER HOOKS. - [SDR 2009FA0000042](https://openairdocs.org/sdr/2009FA0000042.md): Nut · cracked · Jan 8, 2009 · N163AC · Skrsky CH54B · Main Rotor Head > DURING THE DISASSEMBLY OF THE MRH, 1 NUT WAS FOUND CRACKED. THE NUT IS CRACKED THROUGH ON ONE SIDE AND RUNS THE LENGTH OF THE NUT. THE UNT IS ONE OF (2) THAT SECURES THE DAMPER BRACKET TO THE MRH LOWER PLATE. THE CAUSE OF THE CRACK IS BEING INVESTIGATED. ( - [SDR 2006FA0000951](https://openairdocs.org/sdr/2006FA0000951.md): Axle · cracked · Sep 8, 2006 · N158AC · Skrsky CH54B · Main Landing Gear Strut/Axle/Truck > (REF NR: MDR06-091) UPON DISASSEMBLY, AXLE WAS FOUND TO BE CRACKED AND RUNS AROUND THE CIRCUMFERENCE. THE TRACTURE APPEARS TO ROIGINATE IN THE WELD ON THE CENTER OF THE AXLE SHAFT. THE AXLE WAS FRACTURED UNDER THE SOCKET, PN 6425-50202-101, AS EVIDENCED BY A - [SDR JYD2006F00000](https://openairdocs.org/sdr/JYD2006F00000.md): Bearing · spalled · Dec 9, 2005 · N159AC · Skrsky CH54B · Main Rotor Mast/Swashplate > BEARING OUTER RACE SPALLED AND CRACKED. SPALLING AND CRACK ARE ON NR1 BEARING ROW ONLY. CRACK IS APPROXIMATELY 2.25 INCHES LONG. PROBABLE CAUSE IS UNKNOWN. THE BEARING RACE WILL BE ANALYZED TO DETERMINE THE CAUSE. THERE ARE NO RECOMMENDATIONS TO PREVENT RE - [SDR 2005FA0000001](https://openairdocs.org/sdr/2005FA0000001.md): Duct · wrong part · Nov 30, 2004 · N158AC · Skrsky CH54B · Engine Air Intake System > DURING TEARDOWN OF F/T ASSEMBLY, A BROKEN EPR PROBE WAS FOUND AND THE INLET DUCT WAS SITTING LOW WHICH WOULD ALLOW MORE AXIAL TRAVEL OF INLET DUCT DURING OPERATION. AFTER REMOVING INLET DUCT, FOUND THE OVERALL HEIGHT OF INLET DUCT TO BE SHORT. THIS CAUSED WE - [SDR JYDRMDR04065](https://openairdocs.org/sdr/JYDRMDR04065.md): Spacer · cracked · Oct 20, 2004 · N179AC · Skrsky CH54B · Tail Rotor Blades > PART OF THE OB ROOT END SPACER BLOCK BROKE OFF AND WAS SENT THROUGH THE TIP CAP. THE OB SPACER BLOCK HAS SPLIT AROUND THE L/E THROUGH BOLT. PRIOR TO DISASSEMBLY THE OB MOST SPACER BLOCK COULD BE SEEN AS MISSING A PORTION THAT IS ABOUT THE SAME SIZE AS THE HO - [SDR MDR04061](https://openairdocs.org/sdr/MDR04061.md): Bearing Race · cracked · Aug 19, 2004 · N159AC · Skrsky CH54B · Tail Rotor Head > TAIL ROTOR HEAD WAS REMOVED FROM AC DUE TO SUDDEN LEAKAGE FROM TAIL ROTOR GRIP. DISASSEMBLED TAIL ROTOR HEAD AND FOUND THE SHOULDER BOLT INNER RACE CRACKED ON THE BACK SLEEVE AND SPINDLE. CRACK TRAVELS COMPLETELY ACROSS BEARING CONTACT SURFACE AND COMPLETELY - [SDR MDR04050](https://openairdocs.org/sdr/MDR04050.md): Support Beam · cracked · Apr 21, 2004 · N159AC · Skrsky CH54B · Fuselage Main, Structure > IN THE COURSE OF A POST FLIGHT INSPECTION, THE FIELD MAINTENANCE CREW DISCOVERED A CRACK IN THE RT MGB SUPPORT BEAM APPROXIMATELY STA 333. SL 199 AND RBL 20. THIS IS ON THE FORWARD TOP SIDE OF THE BEAM. OVERALL CRACK LENGTH APPROXIMATELY 3 INCHES. PROBABLE - [SDR MDR04047](https://openairdocs.org/sdr/MDR04047.md): Spar · cracked · Mar 16, 2004 · N159AC · Skrsky CH54B · Main Rotor Blades > THE BLADE WAS REMOVED FROM THE AIRCRAFT DUE TO A RED BIM INDICATION. DURING A 10 DAY LEAK CHECK, LOSS OF PRESSURE WAS NOTED. FURTHER INVESTIGATION FOUND A.6250 INCH CRACK LOCATED ON TOP OF BLADE. THE CRACK IS LOCATED 142.5 INCHES FROM TIP END, 6.75 INCH FR - [SDR MDR04046](https://openairdocs.org/sdr/MDR04046.md): Housing · cracked · Mar 15, 2004 · N158AC · Skrsky CH54B · Main Rotor Gearbox > MAIN GEAR BOX (SN A6167) WAS INSTALLED ON AIRCRAFT AND REQUIRED REMOVAL DUE TO A POSSIBLE CRACK FOUND ON THE UPPER HOUSING ON THE RT SIDE. HOUSING APPEARED TO BE SEEPING OIL FROM SUSPECTED CRACK IN THE ARMPIT OF THE UPPER HOUSING. THE SUSPECT AREA WAS LOCALL - [SDR MDR04045](https://openairdocs.org/sdr/MDR04045.md): Housing · cracked · Mar 10, 2004 · N159AC · Skrsky CH54B · Main Rotor Gearbox > DURING ROUTINE FIELD MAINTENANCE INSPECTIONS, A CRACK WAS DISCOVERED UNDER NR 2 INPUT (ARM PIT) APPROXIMATELY 6 INCHES LONG FROM APPROXIMATELY THE 5 TO 8 OCLOCK POSITION. THIS WAS VERIFIED BY FPI. PROBABLE CAUSE IS UNKNOWN. - [SDR MDR04043](https://openairdocs.org/sdr/MDR04043.md): Compressor Wheel · cracked · Jan 22, 2004 · N223AC · Skrsky CH54B · Turbine Engine Compressor Section > A CRACK WAS FOUND IN THE BLADE RETENTION HOLE OF THE 2ND STAGE COMPRESSOR DISK. COMPRESSOR SN 677782, WAS REMOVED FOR HSI/OVERHAUL. DURING THE INSPECTION PROCESS, NDT DETECTED A CRACK IN THE BLADE RETENTION HOLE, CENTER LAND USING EDDY CURRENT. THE CRACK WA - [SDR JYD2004F00003](https://openairdocs.org/sdr/JYD2004F00003.md): Compressor Wheel · cracked · Jan 22, 2004 · N223AC · Skrsky CH54B · Turbine Engine Compressor Section > A CRACK WAS FOUND IN THE BLADE RETENTION HOLE OF THE 2ND STAGE COMPRESSOR DISK. COMPRESSOR, SN 677782, WAS REMOVED FOR HSI/OVERHAUL. DURING THE INSPECTION PROCESS, NDT DETECTED A CRACK IN THE BLADE RETENTION HOLE, CENTER LAND USING EDDY CURRENT. THE CRACK W - [SDR MDR03039](https://openairdocs.org/sdr/MDR03039.md): Attach Angle · cracked · Dec 15, 2003 · N158AC · Skrsky CH54B · Fuselage Miscellaneous Structure > DURING A SCHEDULED INSPECTION, LT ATTACH ANGLE, PN 6420-66340-105, WAS FOUND CRACKED AT STA 767.8 LBL 5.5, WL 177.1. THE CRACK ORIGINATED AT THE BOTTOM HUCK FASTENER AND TRAVELED DOWN TO THE EDGE OF THE ANGLE. THESE ANGLES ATTACH THE INTERCOSTALS TO THE CANT - [SDR JYD2002F00003](https://openairdocs.org/sdr/JYD2002F00003.md): Spar · cracked · May 3, 2002 · N223AC · Skrsky CH54B · Engine/Transmission Coupling > MAIN ROTOR BLADE CRACKED. DURING POST-FLIGHT INSPECTION, AND REQUIRED COMPLIANCE WITH SB, (BLADE INSPECTION METHOD) INDICATION WAS FOUND ON BLADE (SN 64M-6547-5926) BLADE WAS REMOVED. CRACK WAS DETECTED ON TOP SIDE BETWEEN POCKET NR8 AND NR9. CRACK LENGTH A - [SDR JYD2002F00002](https://openairdocs.org/sdr/JYD2002F00002.md): Disk · cracked · Apr 26, 2002 · N223AC · Skrsky CH54B · Turbine Engine Compressor Section > CRACK FOUND IN BLADE PIN RETENTION HOLE OF 2ND STAGE COMPRESSOR DISK. COMPRESSOR (SN 677810) REMOVED FOR OVERHAUL. DURING INSPECTION PROCESS, NDT DETECTED A CRACK IN BLADE PIN RETENTION HOLE, CENTER LAND, USING EDDY CURRENT. CRACK VERIFIED BY FMPI. HOLDING ## 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 = 'CH54B' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/model/sikorsky-ch-54b/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.