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Aircraft record

N541911988 Messerschmitt BO105CBS

DeregisteredUnclaimedSource: FAA, updated Oct 19, 2026

This N-number isn't registered right now. Below is its last known registration, canceled May 11, 2024.

Safety record in brief:No NTSB accidents or incidents since 19823 ADs may apply35 service difficulty reports

Registration
Deregistered
Last based in
Oldsmar, FL
owner city / state
Engine
250-C20 SER · 420 hp
Allison
Owners
1
on record
NTSB events
None
since 1982
ADs may apply
3
confirm with A&P
Service reports
35
since 1995

Registration

FAA Aircraft Registry · Oct 19, 2026
Last registered owner
Hp Aviation INC
Owner type
Corporation
City, state
Oldsmar, FL
Canceled
May 11, 2024
Airworthiness
Standard · Normal
Airworthiness date
Nov 29, 1989

We never show street addresses, even though they appear in the public FAA file. Individual owners are shown by city and state only.

Airframe & engine

FAA Registry + type data

Airframe

Manufacturer
Messerschmitt
Model
BO105CBS
Year
1988
Serial number
S-804
Aircraft type
Rotorcraft
Category
Land
Certification
Type Certificated
Seats
6
Engines
2
Max takeoff weight
Up to 12,499 lb
Mode S code
A6DF50

Engine

Make and model
Allison 250-C20 Ser
Type
Turbo-shaft
Power
420 hp

Total time and engine hours aren't public. They appear here once the owner adds logbooks.

Ownership history

Ownership history from FAA records
  1. until 2024Hp Aviation INCOldsmar, FL
  2. Date unknownIndividual ownerdifferent airframe: Laister-Kauffman Lk-10a S/N 60

Individual owners are shown by city and state only.

Safety record

NTSB · Oct 15, 2026 · FAA ADs · Oct 19, 2026 · SDRs · Oct 16, 2026

NTSB events (0)

No NTSB accidents or incidents found for this airframe since 1982.

ADs published since 1998 that may apply (3)

These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.

ADSubjectEffectiveApplies to
2006-16-04Rolls-Royce Corporation (Formerly Allison Engine Company, Allison Gas Turbine Division…Sep 7, 2006Engine (250-C20 SER)
2006-13-06Rolls-Royce Corporation (Formerly Allison Engine Company, Allison Gas Turbine Division…Jul 26, 2006Engine (250-C20 SER)Only with: Engines with gas producer rotor assembly tie bolt P/Ns A23008020, E23008020 (EXTEX), 23008020, 6843388, 6876991 (RRC), A23008020 (SAP), or 23008020P (Pacific Sky Supply) installed.
2005-10-13Rolls-Royce Corporation (Formerly Allison Engine Company) 250-B17B, -B17C, -B17D, -B17E…Jun 22, 2005Engine (250-C20 SER)Only with: Engines that do not have turbine energy absorbing ring RRC P/N 23035175, or an equivalent FAA-approved serviceable ring, installed.

AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.

Service Difficulty Reports (35)

Reports of failures and defects that operators and repair stations sent to the FAA since 1995. A report describes one finding; it is not an accident.

  • Electrical power · case · corrodedDec 11, 2002

    BATTERY HAS EXCESSIVE CORROSION ON OUTER CASE.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Engine · filter assembly · malfunctionedApr 2, 1999

    FILTER ASSEMBLY WILL NOT BYPASS.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Engine oil · switch · failedAug 28, 1998

    OIL LIGHT WOULD NOT ILLUMINATE WHEN BATTERY SWITCHED TO ON POSITION.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
Show all 10 reports
  • Navigation · encoder · inoperativeAug 17, 1998

    ALTIMETER HAS NO ENCODER OUTPUT.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Rotor flight controls · bellcrank · wornJul 1, 1998

    BELLCRANK ASSY HAS WORN BEARING BORE HOLE.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Engine oil · valve · stickingJul 1, 1998

    VALVE STICKS IN OPEN POSITION.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Navigation · encoder · malfunctionedJun 11, 1998

    ENCODER DOES NOT HOLD CALIBRATION SLOW TO RESPOND.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Navigation · encoder · failedJun 11, 1998

    ENCODER GIVES NO VALID OUTPUT.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Electrical power · ac regulator · failedJun 4, 1998

    UNABLE TO ADJUST VOLTAGE. REGULATOR FAILED.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Equipment and furnishings · elt · failedApr 22, 1998

    BATTERY INOPERATIVE. TIME SINCE REPAIR 0:00.

    From FAA Service Difficulty Reports; matched by N-number and serial number.

Showing the 10 most recent of 35 reports.

Related aircraft

Show all 8 related aircraft

Sources

  • FAA Aircraft RegistryRegistration, owner city and state, airframe, engineupdated Oct 19, 2026
  • NTSB accident and incident databaseAccidents and incidents since 1982updated Oct 15, 2026
  • FAA Airworthiness Directives (Federal Register)ADs published since 1998updated Oct 19, 2026
  • FAA Service Difficulty ReportsReports since 1995updated Oct 16, 2026

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