# N485UH: Messerschmitt-Bolkow-Blohm BK 117 A-4

- Status: Valid registration
- Airframe: [Messerschmitt-Bolkow-Blohm BK 117 A-4](https://openairdocs.org/model/messerschmitt-bolkow-blohm-bk-117-a-4) (registry code 5626017, 8 seats)
- Engine: [Lycoming LTS-101 series](https://openairdocs.org/engine/lycoming-lts-101-series) (registry code 41560)
- Data sheets: [TCDS H13EU](https://openairdocs.org/tcds/H13EU) (Airbus Helicopters Deutschland GmbH (AHD)), [TCDS E5NE](https://openairdocs.org/tcds/E5NE) (Intermountain Turbine Services Inc.) (OpenAirDocs)
- Serial number: 7036
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard, transport
- Airworthiness date: April 28, 1994
- Certificate issued: January 18, 2023
- Expires: January 31, 2030
- Mode S code: A5FCF6
- Registered owner: [Tvpx Aircraft Solutions Inc Trustee](https://openairdocs.org/faa-owner/TVPX%20AIRCRAFT%20SOLUTIONS%20INC%20TRUSTEE)
- Location: [North Salt Lake, UT](https://openairdocs.org/faa-place/UT/North%20Salt%20Lake)
- Owner type: Corporation
- Owner's area on the map: 40.8386° N, 111.9179° W: Placed by OpenAirDocs at the center of ZIP code 84054, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=485UH
- Page: https://openairdocs.org/aircraft/N485UH

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Lycoming LTS-101 model are included.

## ADs that may apply (OpenAirDocs): 24 in force

### Matched by airframe (Messerschmitt-Bolkow-Blohm BK 117 A-4)

None in force.

### Matched by engine (Lycoming LTS-101 series)

- [AD 2011-23-13](https://openairdocs.org/ad/2011-23-13): Power turbine governors (PTG) · Honeywell International LTS101-600A-2, LTS101-600A-3, LTS101-600A-3A and 1 more. Effective Nov 29, 2011
- [AD 2011-08-06](https://openairdocs.org/ad/2011-08-06): Power turbine rotors · Honeywell International LTP 101-600A-1A, LTP 101-700A-1A, LTS101-600A-2 and 10 more. Effective May 17, 2011
- [AD 2009-24-12](https://openairdocs.org/ad/2009-24-12): Gas generator · Honeywell International LTP 101-600A-1A, LTP 101-700A-1A, LTS101-600A-2 and 12 more. Effective Jan 4, 2010
- [AD 2002-03-09 R1](https://openairdocs.org/ad/2002-03-09-R1): Impellers · Honeywell International LTP 101-600, LTP 101-600A, LTP 101-600A-1A and 14 more. Effective Mar 27, 2002
- [AD 2001-25-04](https://openairdocs.org/ad/2001-25-04): Fuel Controls · Honeywell International LTP 101-600A-1A, LTP 101-700A-1A, LTS101-600A-2 and 1 more. Effective Jan 23, 2002
- [AD 2001-22-07](https://openairdocs.org/ad/2001-22-07): Rigid Tube Fuel Manifold Assemblies · Honeywell International LTP 101-600, LTP 101-600A, LTP 101-600A-1A and 14 more. Effective Nov 30, 2001
- [AD 2001-17-15](https://openairdocs.org/ad/2001-17-15): Engine Fuel Pumps · Honeywell International LTP 101-600A-1A, LTP 101-700A-1A, LTS101-600A-2 and 2 more. Effective Oct 1, 2001
- [AD 96-12-27](https://openairdocs.org/ad/96-12-27): Gas Generator Turbine Disk · Honeywell International LTP 101-600, LTP 101-600A, LTP 101-600A-1A and 21 more. Effective Aug 19, 1996
- [AD 96-12-05](https://openairdocs.org/ad/96-12-05): Turbine rotors · Honeywell International LTP 101-600, LTP 101-600A, LTP 101-600A-1A and 14 more. Effective Aug 12, 1996
- [AD 96-10-04](https://openairdocs.org/ad/96-10-04): Fuel control · Honeywell International LTS101-600A-2 and LTS101-600A-3. Effective Jun 13, 1996
- [AD 96-06-10](https://openairdocs.org/ad/96-06-10): Power turbine (PT) disk · Honeywell International LTS101-600A-2, LTS101-600A-3 and LTS101-750B-2. Effective May 28, 1996
- [AD 95-26-01](https://openairdocs.org/ad/95-26-01): Power Turbine · Honeywell International LTS101-650B-1, LTS101-650C, LTS101-750B-1 and 1 more. Effective Apr 22, 1996
- [AD 95-16-04](https://openairdocs.org/ad/95-16-04): Axial Compressor Rotors · Honeywell International LTP 101-600, LTP 101-600A, LTP 101-600A-1A and 21 more. Effective Oct 2, 1995
- [AD 95-08-14](https://openairdocs.org/ad/95-08-14): Electronic Overspeed Protection System · Honeywell International LTS101-650B-1, LTS101-650C-3, LTS101-650C-3A and 2 more. Effective May 9, 1995
- [AD 94-18-06](https://openairdocs.org/ad/94-18-06): Bearings · Honeywell International LTP 101-600, LTP 101-600A, LTP 101-600A-1A and 21 more. Effective Sep 26, 1994
- [AD 93-13-11](https://openairdocs.org/ad/93-13-11): Gas Generator Turbine Rotor Disk · Honeywell International LTP 101-600, LTP 101-600A, LTP 101-600A-1A and 22 more. Effective Nov 8, 1993
- [AD 92-15-07](https://openairdocs.org/ad/92-15-07): Integrally Cast Power Turbine (PT) Rotor Blade · Honeywell International LTP 101-600, LTP 101-600A, LTP 101-600A-1A and 21 more. Effective Sep 2, 1992
- [AD 88-14-01](https://openairdocs.org/ad/88-14-01): Power Turbine Disk · Honeywell International LTS101-600A, LTS101-600A-1, LTS101-600A-2 and 17 more. Effective Jul 6, 1988
- [AD 86-10-04](https://openairdocs.org/ad/86-10-04): Gas Producer (G.P.) Blade · Honeywell International LTP 101-600A-1A, LTP 101-700A-1A, LTS101-600A-2 and 11 more. Effective May 16, 1986
- [AD 84-02-07](https://openairdocs.org/ad/84-02-07): Output Gear Assembly and Torquemeter Gear Assembly · Honeywell International LTS101-600A-2. Effective May 7, 1984
- [AD 83-16-03](https://openairdocs.org/ad/83-16-03): Install Overspeed Limiter · Honeywell International LTS101-600A-2. Effective Aug 25, 1983
- [AD 79-06-06 R2](https://openairdocs.org/ad/79-06-06-R2): Lubrication System Contamination · Honeywell International LTP 101-600, LTP 101-600A, LTS101-600A and 3 more. Effective Jun 2, 1980
- [AD 79-20-03](https://openairdocs.org/ad/79-20-03): Fuel Control, Fuel Pump And Oil Pump Drive Gears · Honeywell International LTP 101-600, LTP 101-600A, LTP 101-600A-1A and 5 more. Effective Sep 26, 1979
- [AD 84-14-01](https://openairdocs.org/ad/84-14-01): T4 Indicator System Check · Honeywell International LTS101-600A-2

### Historical (superseded or no longer in force)

- [AD 95-09-02](https://openairdocs.org/ad/95-09-02) (historical): Fuel Pumps · Honeywell International LTP 101-600, LTP 101-600A, LTP 101-600A-1A and 12 more. Effective May 10, 1995

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N485UH.

## FAA accident and incident reports (2)

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.

- [Incident 20180125001629I](https://openairdocs.org/incident/20180125001629I), Jan 25, 2018: Messerschmitt-Bolkow-Blohm BK 117 A-4 (N485UH), Borden, IN, Minor damage. On January 25, 2018, about 1920 eastern standard time (EST) (0020Z), a Messerschmitt-Bolkow-Blohm bk 117, N485UH, with three crewmembers onboard, struck tree…
- [Incident 20070221003319I](https://openairdocs.org/incident/20070221003319I), Feb 21, 2007: Bolkms BK117A4 (N485UH), Carteret County, NC, Minor damage. (-23) Aircraft departed Carteret County hospital on 2045 local time. Pilot encountered shallow layer of scattered/broken fog at approximately 300'. Soon…

## Service difficulty reports (11)

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

- [SDR QMLA2018112518125](https://openairdocs.org/sdr/QMLA2018112518125), Nov 25, 2018: RIVET. LOOSE. PILOT CONTACTED ME AFTER PERFORMING HIS DAILY PREFLIGHT AIRWORTHINESS CHECK. HE STATED THE TAIL ROTOR WAS MAKING A POPPING SOUND WHEN ROTATING IT BY HAND. I PRO
- [SDR QMLA2017050517047](https://openairdocs.org/sdr/QMLA2017050517047), May 5, 2017: LANDING LIGHT. ODOR. ON APPROACH, THE FLIGHT CREW SMELLED A LIGHT ODOR OF BURNING PLASTIC. ONCE ON THE GROUND, THE MECHANIC FOUND THE RETRACTABLE LANDING LIGHT TO BE THE SOURCE. THE
- [SDR QMLA2013080113110](https://openairdocs.org/sdr/QMLA2013080113110), Aug 1, 2013: SWITCH. WORN. DURING LANDING , NOTICED NR 1 ENGINE FIRE LIGHT ILLUMINATED. AFTER LANDING AND SHUTDOWN NOTICED THE TEST SWITCH WAS NOT IN THE SPRING LOADED NEUTRAL POSITION. D
- [SDR QMLA2012011912008](https://openairdocs.org/sdr/QMLA2012011912008), Jan 19, 2012: BOLT. BROKEN. WHILE PERFORMING A ZONE 4 INSPECTION IAW AMC AAIP, WHICH REQUIRES AN INSPECTION OF THE TAIL ROTOR GEARBOX FOR PROPER TORQUE OF ATTACHING HARDWARE. DURING THIS I
- [SDR QMLA2011060211061](https://openairdocs.org/sdr/QMLA2011060211061), Jun 2, 2011: DOOR. SEPARATED. WHILE THE PILOT WAS IN CRUISE FLIGHT CONDUCTING AN ORIENTATION FLIGHT WITH ONLY A PASSENGER IN THE COPILOT SEAT, THE LT CABIN DOOR SEPARATED FROM THE ACFT AT AP
- [SDR QMLDMG1475](https://openairdocs.org/sdr/QMLDMG1475), Dec 7, 2010: STRUCTURE. CORRODED. DURING INSP FOUND CORROSION ON THE LT INBD, RT INBD AND RT AFT ENGINE DECK.
- [SDR QMLDMG1474](https://openairdocs.org/sdr/QMLDMG1474), Dec 7, 2010: FRAME. CRACKED. DURING INSP FOUND THE TAIL CONE "A" FRAME CRACKED AT THE ECS BLEED LINE ATTACHMENT. AWAITING A REPAIR SCHEME FROM MFG.
- [SDR QMLDMG1473](https://openairdocs.org/sdr/QMLDMG1473), Nov 24, 2010: SKIN. DENTED. (QMLD) VARIOUS DENTS, PUNCTURES, AND GOUGES TO THE OUTER SKIN OF THE LOWER FUSELAGE BELLY AREA. THE INTERNAL FRAME IS DEFORMED IN ONE LOCATION ALSO. SUBMITTED D
- [SDR QMLDMG1472](https://openairdocs.org/sdr/QMLDMG1472), Oct 7, 2010: DOUBLER. CRACKED. DURING AN INSPECTION OF THE TAIL CONE AREA FOUND THE AFT DOUBLER FRAME AT STA 6135 CRACKED. CONSULTED MFG AND ARE AWAITING A REPAIR SCHEME.
- [SDR QMLDMG1471](https://openairdocs.org/sdr/QMLDMG1471), Oct 7, 2010: STRUCTURE. CHAFED. DURING INSPECTION OF THE AIRFRAME, FOUND CHAFING FROM THE TRANSMISSION COWLINGS ON THE LT AND RT SIDES INTO THE LT AND RT SIDES OF THE TRANSMISSION DECK. CONSUL
- [SDR QML2008F00022](https://openairdocs.org/sdr/QML2008F00022), Oct 24, 2008: BULKHEAD. CRACKED. WHILE PERFORMING NON RELATED MX ON N125EC SN 7065 A CRACK WAS DISCOVERED IN THE LT AFT 5600 BULKHEAD IN THE AREA OF THE MOUNTED VACUUM PUMP. THE ACFT WAS GROUND

## STCs that may be installed (OpenAirDocs) (1)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the engine (Lycoming LTS-101 series)

- [STC SE934GL](https://openairdocs.org/stc/SE934GL): Installation of a fuel flow tranducer. Shadin Avionics. Lists LTS101-650B-1

## Related

- Other Messerschmitt-Bolkow-Blohm BK 117 A-4 aircraft: https://openairdocs.org/model/messerschmitt-bolkow-blohm-bk-117-a-4/aircraft.md
- The Lycoming LTS-101 series engine: https://openairdocs.org/engine/lycoming-lts-101-series.md

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