# N4573B: Messerschmitt-Boelkow-Blohm BO-105S, registration cancelled 2024-05-11 - Type: Cancelled registration (FAA registry, deregistered aircraft) - Cancelled: May 11, 2024 - Status when cancelled: Expired dealer - Airframe: [Messerschmitt-Boelkow-Blohm BO-105S](https://openairdocs.org/model/messerschmitt-boelkow-blohm-bo-105s) (registry code 5626006) - Data sheets: [TCDS H3EU](https://openairdocs.org/tcds/H3EU) (OpenAirDocs) - Serial number: S673 - Type of aircraft: Rotorcraft - Last registry action: June 29, 2006 - Mode S code: A58EE0 - Owner when cancelled: [Hp Aviation Inc](https://openairdocs.org/faa-owner/HP%20AVIATION%20INC) - Location: [Oldsmar, FL](https://openairdocs.org/faa-place/FL/Oldsmar) - Owner type: Corporation - Owner's area on the map: 28.0445° N, 82.6743° W: Placed by OpenAirDocs at the center of ZIP code 34677, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based - The mark today: https://openairdocs.org/aircraft/N4573B - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4573B - Page: https://openairdocs.org/deregistered/N4573B-2024-05-11 From the FAA registry file of November 4, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe. ADs and bulletins for the Messerschmitt-Boelkow-Blohm BO-105S: https://openairdocs.org/model/messerschmitt-boelkow-blohm-bo-105s.md ## Service difficulty reports (28) Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. - [SDR HEEA082674](https://openairdocs.org/sdr/HEEA082674), Dec 11, 2002: FACEPLATE. DAMAGED. FACEPLATE BAD. FOUND LIGHT PANEL, VOLUME AND SELECTOR KNOBS, SWITCHES S6, S10, AND S11 BAD. REPLACED, REPAIRED. BENCH CHECK GOOD. - [SDR HEEA079289](https://openairdocs.org/sdr/HEEA079289), May 24, 2002: BLADE. ERODED. THE OUTBOARD ABRASION STRIP ON MAIN ROTOR BLADE HAS EROSION HOLE. - [SDR HEEA063855](https://openairdocs.org/sdr/HEEA063855), Aug 31, 1999: NOZZLE. CRACKED. ENGINE REMOVED DUE TO 3,500 HOUR OVERHAUL. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: CRACKED VANES ON NR 1 NOZZLE. INSTALLED NEW PART. - [SDR HEEA062899](https://openairdocs.org/sdr/HEEA062899), Jul 12, 1999: TRANSCEIVER. INOPERATIVE. INOPERATIVE. WILL NOT COME ON. PERFORMED PRELIMINARY INSPECTION. FOUND UNIT TO BE DRAWING CURRENT, BUT ALL POWER SUPPLY VOLTAGES ARE LOW. - [SDR HEEA060468](https://openairdocs.org/sdr/HEEA060468), Jan 25, 1999: TRANSDUCER. READS LOW. TRANSDUCER READS EXCESSIVLEY LOW. - [SDR HEEA0016738](https://openairdocs.org/sdr/HEEA0016738), Nov 6, 1998: TRANSDUCER. FAILED. TRANSDUCER - OUTPUT DOES NOT CHANGE WITH PRESSURE APPLIED. - [SDR HEEA0016704](https://openairdocs.org/sdr/HEEA0016704), Nov 6, 1998: INDICATOR. FLUCTUATED. OIL INDICATION FLUCTUATES, NR 1 NEEDLE STICKS AT ZERO. - [SDR HEEA0016650](https://openairdocs.org/sdr/HEEA0016650), Nov 5, 1998: DRIVE SHAFT. CRACKED. CRACKS AND FLAKING ON INBOARD JOURNAL FLAME SPRAY COATING. - [SDR HEEA0016031](https://openairdocs.org/sdr/HEEA0016031), Sep 11, 1998: FUEL CONTROL. OUT OF ADJUST. ON FIRST START AFTER INSTALLATION IN THE AIRCRAFT, TOT ROSE RAPIDLY. FOUND START/ACCEL AND START/DERICH ADJUSTMENTS TURNED TO MINIMUM, NO MORE ADJUSTMENT AVAILA - [SDR HEEA0015933](https://openairdocs.org/sdr/HEEA0015933), Aug 28, 1998: SERVOMOTOR. FAILED. SERVO MOTOR WILL NOT ACTUATE, FILTER SHORTED TO GROUND. - [SDR HEEA0015560](https://openairdocs.org/sdr/HEEA0015560), Aug 14, 1998: TRANSDUCER. FAILED. NO OUTPUT FROM TRANSDUCER. - [SDR HEEA0015058](https://openairdocs.org/sdr/HEEA0015058), Jun 30, 1998: BEVEL GEAR SET. SPALLED. SPALLING OF M/R GEARBOX GEAR TEETH. SCRAPPED PARTS AND REPLACED WITH NEW PARTS. - [SDR HEEA0014678](https://openairdocs.org/sdr/HEEA0014678), Jun 10, 1998: INDICATOR. OUT OF TOLERANCE. FOUND ENGINE TOT UNIT TO READ OUT OF TOLERANCE THROUGHOUT SCALE. - [SDR HEEA0014514](https://openairdocs.org/sdr/HEEA0014514), Jun 4, 1998: TRANSMITTER. INOPERATIVE. FUEL PRESSURE TRANSMITTER INOPERABLE. - [SDR HEEA0013240](https://openairdocs.org/sdr/HEEA0013240), Mar 4, 1998: INDICATOR. FAILED. MAST MOMENT INDICATOR HAS NO INDICATION IN FLIGHT. - [SDR HEEA0013239](https://openairdocs.org/sdr/HEEA0013239), Mar 4, 1998: TRANSMITTER. FAILED. MAST MOMENT INDICATOR NO INDICATION IN FLIGHT. - [SDR HEEA0012765](https://openairdocs.org/sdr/HEEA0012765), Feb 5, 1998: BEVEL GEAR. SPALLED. FOUND SPALLING ON BEVEL GEAR TEETH. REPLACED WITH SERVICEABLE PART. - [SDR HEEA0012764](https://openairdocs.org/sdr/HEEA0012764), Feb 5, 1998: SUN GEAR. SPALLED. FOUND SPALLING ON SUN GEAR TEETH. REPLACED WITH SERVICEABLE PART. - [SDR HEEA0012378](https://openairdocs.org/sdr/HEEA0012378), Dec 18, 1997: SPLINE ADAPTER. WORN. ENGINE REMOVED DUE TO CRACKED COMPRESSOR SCROLL AND VIBRATION. UPON INSPECTION OF COMPRESSOR PARTS NOTED: WORN BEYOND SERVICEABLE LIMITS ON SPLINE ADAPTER RETAI - [SDR HEEA0011883](https://openairdocs.org/sdr/HEEA0011883), Nov 10, 1997: TRANSDUCER. FAILED. INDICATES LOW OUT OF TOLERANCE. - [SDR HEEA0011882](https://openairdocs.org/sdr/HEEA0011882), Nov 10, 1997: TRANSDUCER. DEFECTIVE. FUEL PRESSURE INDICATES LOW OUT OF TOLERANCE. - [SDR 98ZZZX2099](https://openairdocs.org/sdr/98ZZZX2099), Nov 2, 1997: GOVERNOR. MALFUNCTIONED. DURING FLIGHT, NR 2 ENGINE BEGAN OSCILLATING. PILOT RETURNED TO BASE AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED ENGINE N2 GOVERNOR DUE TO STIFF CONTROL S - [SDR HEEA0011366](https://openairdocs.org/sdr/HEEA0011366), Oct 9, 1997: GYRO. DEFECTIVE. DIR GYRO INTERMEDIATE GEAR OUT OF BALANCE. EAST HEADING PRECESSES EXCESSIVELY. - [SDR HEEA0010554](https://openairdocs.org/sdr/HEEA0010554), Aug 5, 1997: COUPLING. WORN. ENGINE REMOVED DUE TO METAL. UPON INSPECTION OF TURBINE PARTS NOTED: WEAR BEYOND SERVICEABLE LIMITS ON N1 COUPLING SPLINES (FAILED NO GO GAUGE) INSTALLED A NEW - [SDR HEEA0010072](https://openairdocs.org/sdr/HEEA0010072), Jun 11, 1997: TRANSCEIVER. INOPERATIVE. TRANSCEIVER LOCALIZER INOPERATIVE. - [SDR HEEA0010015](https://openairdocs.org/sdr/HEEA0010015), Jun 2, 1997: TRANSDUCER. FAILED. TRANSDUCER PEGS HIGH AND FLUCTUATES. - [SDR HEEA968474](https://openairdocs.org/sdr/HEEA968474), Nov 13, 1996: TUBE ASSY.. OUT OF SPEC. ENGINE REMOVED DUE TO METAL IN OIL. UPON INSPECTION OF GEARBOX PARTS NOTED THE FOLLOWING:TUBE FAILED DIMENSIONAL CHECK PER CEB 1307. INSTALLED A NEW PART. - [SDR HEEA968222](https://openairdocs.org/sdr/HEEA968222), Oct 11, 1996: REAR DIFFUSER. MIS MFG. RECEIVING INSPECTION REVEALED: BEARING BORE UNDERSIZED MEASURED 2.165 (SPECS 2.1654 - 2.1659) ON REAR DIFFUSER. ## Other aircraft with N4573B - [Cancelled 1955-05-09](https://openairdocs.org/deregistered/N4573B-1955-05-09): Cessna 180, S/N 31472. Exported to Mexico. Owner: [Cessna Aircraft Company](https://openairdocs.org/faa-owner/CESSNA%20AIRCRAFT%20COMPANY), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita) --- 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.