# N5421E: 1989 Messerschmitt BO105CBS, registration cancelled 2024-05-11

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 11, 2024
- Status when cancelled: Expired dealer
- Airframe: [Messerschmitt BO105CBS](https://openairdocs.org/model/messerschmitt-bo105cbs) (registry code 5626008)
- Engine: [Allison 250-C20 series](https://openairdocs.org/engine/allison-250-c20-series) (registry code 03020)
- Data sheets: [TCDS E4CE](https://openairdocs.org/tcds/E4CE) (OpenAirDocs)
- Serial number: S-806
- Year built: 1989
- Type of aircraft: Rotorcraft
- Engine type: Turbo-prop
- Airworthiness: Standard, normal
- Airworthiness date: November 29, 1989
- Last registry action: June 29, 2006
- Mode S code: A6E1DA
- 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/N5421E
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=5421E
- Page: https://openairdocs.org/deregistered/N5421E-2024-05-11

From the FAA registry file of November 12, 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 BO105CBS: https://openairdocs.org/model/messerschmitt-bo105cbs.md

## Service difficulty reports (51, newest 50)

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR HEEA079788](https://openairdocs.org/sdr/HEEA079788), May 30, 2002: BATTERY. WEAK. BATTERY WEAK. REPAIRED.
- [SDR HEEA065159](https://openairdocs.org/sdr/HEEA065159), Nov 15, 1999: PUMP. LEAKING. FUEL PUMP ASSY LEAKING AT SCREWS ON BASE PLATE.
- [SDR HEEA063668](https://openairdocs.org/sdr/HEEA063668), Aug 17, 1999: SEAL. CHIPPED. ENGINE REMOVED DUE TO TURBINE OVERHAUL. UPON INSPECTION OF TURBINE PARTS NOTED: PITS AND CHIPPING ON CARBON SEAL MATING SURFACE. INSTALLED NEW CARBON SEAL.
- [SDR HEEA063437](https://openairdocs.org/sdr/HEEA063437), Aug 9, 1999: INDICATOR. INOPERATIVE. TURN AND SLIP INDICATOR INOPERATIVE.
- [SDR HEEA0016758](https://openairdocs.org/sdr/HEEA0016758), Nov 6, 1998: INDICATOR. ERRATIC. FUEL LEVEL GAUGE SUPPLY INDICATOR ERRATIC.
- [SDR HEEA0016709](https://openairdocs.org/sdr/HEEA0016709), Nov 6, 1998: TRANSMITTER. FAILED. INDICATOR DROPS TO ZERO AFTER TRANSMITTER WARMS UP.
- [SDR HEEA0016651](https://openairdocs.org/sdr/HEEA0016651), Nov 5, 1998: DRIVE SHAFT. CRACKED. TAIL ROTOR HAS CRACKS IN PLATING.
- [SDR HEEA0015916](https://openairdocs.org/sdr/HEEA0015916), Aug 28, 1998: TRANSMITTER. READS HIGH. FUEL PRESSURE TRANSMITTER READS HIGH DURING PUMP OPERATION.
- [SDR HEEA0015779](https://openairdocs.org/sdr/HEEA0015779), Aug 26, 1998: WARNING BOX. MALFUNCTIONED. RPM LIGHT AND AUDIO COME ON INTERMITTENTLY.
- [SDR HEEA0015543](https://openairdocs.org/sdr/HEEA0015543), Aug 14, 1998: INDICATOR. STICKING. TACHOMETER STICKS AT LOW RPM EXCESSIVE FRICTION ERROR.
- [SDR HEEA0015482](https://openairdocs.org/sdr/HEEA0015482), Jul 30, 1998: INDICATOR. STICKING. INDICATOR STICKS AT LOW RPM.
- [SDR HEEA0015384](https://openairdocs.org/sdr/HEEA0015384), Jul 29, 1998: INDICATOR. INOPERATIVE. NEEDLES NOT MOVING, NO INDICATION ON RPM INDICATOR.
- [SDR HEEA0014699](https://openairdocs.org/sdr/HEEA0014699), Jun 10, 1998: TRANSMITTER. FAULTY. FUEL PRESSURE TRANSMITTER PEGS OUT INTERMITTENTLY.
- [SDR HEEA0013734](https://openairdocs.org/sdr/HEEA0013734), Apr 2, 1998: INDICATOR. ERRATIC. ERRATIC ON STARTUP AND SHUTDOWN.
- [SDR HEEA0013727](https://openairdocs.org/sdr/HEEA0013727), Apr 2, 1998: INDICATOR. STICKS. INDICATOR INTERMITTENTLY STICKS AT ZERO.
- [SDR HEEA0013351](https://openairdocs.org/sdr/HEEA0013351), Mar 17, 1998: TACH-GENERATOR. MALFUNCTION. FROM STOCK, INSTALLED IN AIRCRAFT DURING GROUND RUN, HAD NO NEEDLE INDICATION ON TRIPLE TACH INDICATOR. INSPECTED AND TESTED BY ACCESSORY OVERHAUL SHOP AND COUL
- [SDR HEEA0012758](https://openairdocs.org/sdr/HEEA0012758), Feb 3, 1998: PT SUPPORT. DEFECTIVE. TURBINE REMOVED DUE TO CYCLES. UPON INSPECTION OF TURBINE PARTS NOTED: MEASURED .003 OVER SPECS (1.764-1.761) ON PT SUPPORT NR 6 DAMPER GROOVE AND CHROME FLAKIN
- [SDR HEEA0012757](https://openairdocs.org/sdr/HEEA0012757), Feb 3, 1998: NOZZLE. CRACKED. TURBINE REMOVED DUE TO CYCLES. UPON INSPECTION OF TURBINE PARTS NOTED: CRACKED BEYOND SERVICEABLE LIMITS ON NR 3 NOZZLE FORWARD FLANGE AND AREAS MARKED. INSTALL
- [SDR HEEA0012648](https://openairdocs.org/sdr/HEEA0012648), Jan 26, 1998: INDICATOR. FAILED. MAST MOMENT INDICATOR READS HIGH OUT OF TOLERANCE.
- [SDR HEEA0012647](https://openairdocs.org/sdr/HEEA0012647), Jan 26, 1998: TRANSMITTER. FAILED. TORQUE TRANSMITTER READS HIGH OUT OF TOLERANCE.
- [SDR HEEA0012646](https://openairdocs.org/sdr/HEEA0012646), Jan 26, 1998: INDICATOR. FAILED. MAST MOMENT INDICATOR WILL NOT CALIBRATE OR TEST.
- [SDR HEEA0012645](https://openairdocs.org/sdr/HEEA0012645), Jan 26, 1998: TRANSMITTER. FAILED. TORQ TRANSMITTER WILL NOT CALIBRATE OR TEST.
- [SDR HEEA0011712](https://openairdocs.org/sdr/HEEA0011712), Oct 22, 1997: INDICATOR. STICKS. TOT NEEDLE HAS EXCESSIVE FRICTION.
- [SDR HEEA0011666](https://openairdocs.org/sdr/HEEA0011666), Oct 22, 1997: INDICATOR. FAILED. TOT INDICATOR HAD EXCESSIVE FRICTION AND READS LOW OUT OF TOLERANCE.
- [SDR HEEA0011458](https://openairdocs.org/sdr/HEEA0011458), Oct 10, 1997: IGNITER BOX. DEFECTIVE. IGNITER BOX THREADS ON IGNITER LEAD CONNECTOR CROSS THREADED.
- [SDR HEEA0010502](https://openairdocs.org/sdr/HEEA0010502), Jul 16, 1997: TRANSMITTER. DEFECTIVE. FUEL PRESS TRANSMITTER INTERMITTENT LOW FUEL PRESSURE.
- [SDR HEEA0010423](https://openairdocs.org/sdr/HEEA0010423), Jul 9, 1997: CLUTCH. SLIPPAGE. FREEWHEEL CLUTCH SLIPPAGE.
- [SDR HAIHEEA9990](https://openairdocs.org/sdr/HAIHEEA9990), May 30, 1997: CLUTCH. SLIPPING. FREEWHEEL SLIPPAGE.
- [SDR HAIHEEA9803](https://openairdocs.org/sdr/HAIHEEA9803), May 7, 1997: BLADE. CRACKED. NOSE AND NECK SHELL CRACKED AND TIP CAP SEPARATED.
- [SDR HAIHEEA9541](https://openairdocs.org/sdr/HAIHEEA9541), Apr 23, 1997: BLADE. PAINT PEEL. T/R BLADE PAINT PEELING. TIME SINCE REPAIR 99:25.
- [SDR HAIHEEA9540](https://openairdocs.org/sdr/HAIHEEA9540), Apr 23, 1997: BLADE. REQ REPAINT. NO DISCREPANCIES, BLADE REQ REPAINT TO BALANCE.
- [SDR HEEA968537](https://openairdocs.org/sdr/HEEA968537), Nov 21, 1996: NOZZLE. CRACKED. ENGINE REMOVED DUE TO AFT T/M LEAKS. TURBINE DISASSEMBLED DUE TO LOW POWER ON TEST RUN. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: CRACKED AND BOWED 
- [SDR HEEA968136](https://openairdocs.org/sdr/HEEA968136), Oct 4, 1996: COMB LINER. NOT WELDED. RECEIVING INSPECTION REVEALED: MID SKIRT NOT WELDED TO LOWER SKIRT ON COMBUSTION LINER AS MARKED. REPLACED DISCREPANT PART.
- [SDR HEEA968020](https://openairdocs.org/sdr/HEEA968020), Oct 3, 1996: RPM WARN BOX. MALFUNCTION. WARNING LIGHT ILLUMINATES AT 100% N2 AND 100% NR WITH N1'S MATCHED. DOES NOT ILLUMINATE WITH 12% N1 SPLIT.
- [SDR HEEA967746](https://openairdocs.org/sdr/HEEA967746), Sep 3, 1996: INDICICATOR. STICKS. STICKS FROM 0% TO 30% INTERMITTENTLY. TIME SINCE REPAIR 17:05.
- [SDR HEEA967649](https://openairdocs.org/sdr/HEEA967649), Aug 13, 1996: CASE. DEFECTIVE. UPON TURBINE ASSEMBLY NOTED THE FOLLOWING: UNABLE TO FIT AIR TUBE RETAINING RING INTO COMB CASE RING GROOVE. REPLACED DISCREPANT PART.
- [SDR HEEA967504](https://openairdocs.org/sdr/HEEA967504), Jul 5, 1996: INDICATOR. WONT CALIB. WILL NOT CALIBRATE.
- [SDR HEEA967312](https://openairdocs.org/sdr/HEEA967312), Jun 4, 1996: CONTROL ROD. CORRODED. ROD IS CORRODED. (CORROSION FOUND UNDERNEATH BLACK HEAT SHRINK. REPLACED WITH SERVICEABLE CONTROL TUBE.
- [SDR HEEA967309](https://openairdocs.org/sdr/HEEA967309), May 31, 1996: CONTROL ROD. DAMAGED. NUT END OF CONTROL ROD DAMAGED. REPLACED WITH SERVICEABLE CONTROL ROD.
- [SDR HEEA967308](https://openairdocs.org/sdr/HEEA967308), May 31, 1996: CONTROL ROD. CORRODED. CONTROL ROD IS CORRODED. (CORROSION UNDER CONTROL ROD NUT) REPLACED WITH SERVICEABLE CONTROL ROD.
- [SDR HEEA966482](https://openairdocs.org/sdr/HEEA966482), Jan 19, 1996: TUBE ASSY. LEAKING. ENGINE REMOVED DUE TO OIL LEAKING AT GEARBOX SPLIT LINE. UPON INSPECTION OF GEARBOX PARTS NOTED THE FOLLOWING: OIL TRANSFER TUBE FAILED DIMENSIONAL CHECK IN ACC
- [SDR HEEA966331](https://openairdocs.org/sdr/HEEA966331), Jan 2, 1996: BLADE. DELAMINATED. ENGINE REMOVED DUE TO CYCLED OUT 2ND STAGE WHEEL. UPON INSPECTION OF TURBINE PARTS NOTED THE FOLLOWING: SULFIDATION OF 1ST STAGE WHEEL BLADES CAUSING DELAMINATI
- [SDR HEEA955566](https://openairdocs.org/sdr/HEEA955566), Aug 8, 1995: TRANSCEIVER. DEFECTIVE. TRANSPONDER WILL NOT IDENT. RESOLDERED COLD SOLDER JOINT ON DIODE CR416. REPAIRED RECEIVE PROBLEM. FOUND -10 VOLTS ON -6 VOLT LINE. TROUBLESHOT AND FOUND C409 C
- [SDR HEEA955558](https://openairdocs.org/sdr/HEEA955558), Aug 8, 1995: PUMP ASSY. DEFECTIVE. PUMP CUTS OUT AND CAUSE FUEL PRESSURE TO FLUCTUATE. REPLACED PUMP ASSEMBLY.
- [SDR HEEA955000](https://openairdocs.org/sdr/HEEA955000), May 12, 1995: CENTER CASE. WORN. CENTER CASE TAIL ROTOR BORE WORN BEYOND LIMITS.
- [SDR HEEA954986](https://openairdocs.org/sdr/HEEA954986), May 12, 1995: BLADE. CRACKED. NOSE AND NECK SHELLS CRACKED.
- [SDR HEEA954985](https://openairdocs.org/sdr/HEEA954985), May 12, 1995: BLADE. CRACKED. NOSE AND NECK SHELLS CRACKED.
- [SDR HEEA954729](https://openairdocs.org/sdr/HEEA954729), Apr 10, 1995: INDICATOR. DEFECTIVE. ROTOR AND #2 NEEDLE BOUNCES.
- [SDR HEEA954728](https://openairdocs.org/sdr/HEEA954728), Apr 10, 1995: INDICATOR. DEFECTIVE. #2 NEEDLE READS LOW BELOW TOLERANCE.
- [SDR HEEA954705](https://openairdocs.org/sdr/HEEA954705), Apr 7, 1995: LORAN. DEFECTIVE. SLOW TO WARM UP. LOSES ITSELF. SENT TO ARNAV SYSTEMS FOR INSPECTION AND REPAIR.

All 51: https://openairdocs.org/deregistered/N5421E-2024-05-11/reports.md

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