# N491HL: 1984 Messerschmitt-Boelkow-Blohm BO-105S CDN-BS-4, registration cancelled 2003-03-12

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: March 12, 2003
- Exported to: Canada
- Status when cancelled: Triennial form not returned
- Airframe: [Messerschmitt-Boelkow-Blohm BO-105S CDN-BS-4](https://openairdocs.org/model/messerschmitt-boelkow-blohm-bo-105s-cdn-bs-4) (registry code 5627000)
- Engine: [Allison 250 series](https://openairdocs.org/engine/allison-250-series) (registry code 03014)
- Data sheets: [TCDS H3EU](https://openairdocs.org/tcds/H3EU) (OpenAirDocs)
- Serial number: S-664
- Year built: 1984
- Type of aircraft: Rotorcraft
- Engine type: Turbo-prop
- Airworthiness: Standard, transport
- Airworthiness date: October 2, 1986
- Certificate issued: March 15, 1995
- Last registry action: February 20, 2001
- Mode S code: A61489
- Owner when cancelled: [Air Logistics Of Alaska Inc](https://openairdocs.org/faa-owner/AIR%20LOGISTICS%20OF%20ALASKA%20INC)
- Location: [Fairbanks, AK](https://openairdocs.org/faa-place/AK/Fairbanks)
- Owner type: Corporation
- Owner's area on the map: 67.3758° N, 149.7280° W: Placed by OpenAirDocs at the center of ZIP code 99701, within about 13 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N491HL
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=491HL
- Page: https://openairdocs.org/deregistered/N491HL-2003-03-12

From the FAA registry file of October 29, 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 CDN-BS-4: https://openairdocs.org/model/messerschmitt-boelkow-blohm-bo-105s-cdn-bs-4.md

## Service difficulty reports (2)

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

- [SDR 98ZZZX309](https://openairdocs.org/sdr/98ZZZX309), Nov 14, 1997: WIRE. SHORTED. WHILE AIRCRAFT WAS RUNNING, THE ODOR OF BURNED WIRE INSULATION WAS NOTICED AND NR 1 GENERATOR LIGHT ILLUMINATED AND THEN EXTINGUISHED. AIRCRAFT WAS SHUT DOWN. T
- [SDR 95ZZZX6205](https://openairdocs.org/sdr/95ZZZX6205), Sep 15, 1995: HOUSING. FLANGE DAMAGE. DURING DISASSEMBLY, THE RIGHT OIL PASSAGE O-RING FLANGE WAS FOUND DAMAGED. THE DAMAGE WAS OBVIOUSLY NOTED DURING LAST OVERHAUL DUE TO THE INSTALLATION OF 2 O-RI

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB ANC02LA081](https://openairdocs.org/ntsb/ANC02LA081), Jul 23, 2002: MBB BO-105S (N491HL), Deadhorse, AK, substantial damage. Probable cause: The pilot's failure to correct a settling-with-power condition during a helicopter landing flare/touchdown, resulting in a hard landing and roll over.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20020723016189A](https://openairdocs.org/incident/20020723016189A), Jul 23, 2002: Bolkms BO105S (N491HL), Deadhorse, AK, No damage. (.19) On July 23, 2002, about 1515 Alaska daylight time, a high skid-equipped mbb BO-105 helicopter, N491HL, sustained substantial damage during landing in a…

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