# N155SC: Messerschmitt BK 117 B-1

- Status: Valid registration
- Airframe: [Messerschmitt BK 117 B-1](https://openairdocs.org/model/messerschmitt-bk-117-b-1) (registry code 5626012, 11 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: 7141
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard, transport
- Airworthiness date: May 6, 1988
- Certificate issued: August 13, 2013
- Expires: August 31, 2029
- Mode S code: A0DE55
- Registered owner: [Air Methods LLC](https://openairdocs.org/faa-owner/AIR%20METHODS%20LLC)
- Location: [Greenwood Village, CO](https://openairdocs.org/faa-place/CO/Greenwood%20Village)
- Owner type: LLC
- Owner's area on the map: 39.6120° N, 104.8828° W: Placed by OpenAirDocs at the center of ZIP code 80111, 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=155SC
- Page: https://openairdocs.org/aircraft/N155SC

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 BK 117 B-1)

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 N155SC.

## 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.

- [Incident 20100706038189I](https://openairdocs.org/incident/20100706038189I), Jul 6, 2010: Messerschmi BK 117 B-1 (N155SC), Beatrice, NE, No damage. On Tuesday July 6, 2010, at approximately 08:00 CDT, N155SC, MBB-BK117-B1, operated by air methods corporation was enroute at 2,500 feet, from bryan lgh west…

## Service difficulty reports (10)

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 QMLA201403214030](https://openairdocs.org/sdr/QMLA201403214030), Mar 25, 2014: DRAIN. STUCK. FUEL ODOR WHEN CABIN HEAT TURNED ON.
- [SDR QMLA2014011014004](https://openairdocs.org/sdr/QMLA2014011014004), Jan 15, 2014: FRAME. CRACKED. TAIL CONE LT OUTER FRAME CRACKED.
- [SDR QMLA2013110713161](https://openairdocs.org/sdr/QMLA2013110713161), Nov 7, 2013: UNKNOWN. ODOR. DURING LANDING, ODOR OF SMOKE IN COCKPIT AND THEN CENTER PANEL LIGHTS WENT OUT. INSPECTION FOUND NO DAMAGED WIRES. PANEL LIGHTING DIMMERS WERE INSPECTED AND SHO
- [SDR QMLA2012052612089](https://openairdocs.org/sdr/QMLA2012052612089), May 26, 2012: TRANSMISSION. MAKING METAL. TRANSMISSION CHIP CAUTION ILLUMINATED 100' FROM BASE HELIPAD DURING APPROACH FOR LANDING. ACTIVATED CHIP PULSE SEVERAL TIMES AFTER LANDING AND DURING SHUTDOWN. 
- [SDR QMLA2011012811020](https://openairdocs.org/sdr/QMLA2011012811020), Jan 29, 2011: TERMINAL. BROKEN. ON LANDING, ACFT PITCHED UP AND DOWN WITH NO PILOT CONTROL MOVEMENT AND CSAS PITCH LIGHT CAME ON. TROUBLESHOOTING AND INSP FOUND WIRE TERMINAL AT TB811 BROKEN. 
- [SDR QMLA2010081110049](https://openairdocs.org/sdr/QMLA2010081110049), Aug 10, 2010: WARNING LIGHT. FALSE ACTIVATION. ON SECOND LEG OF PATIENT FLIGHT, THE NR 2 HYD WARNING LIGHT ILLUMINATED ALONG WITH PRESSURE GAUGE INDICATION FLUCTUATION BETWEEN 0 AND 40 BAR. INSPECTED DUAL HY
- [SDR QMLA2001070610029](https://openairdocs.org/sdr/QMLA2001070610029), Jul 6, 2010: GYRO. FAILED. 5 MIN AFTER TAKEOFF, BASE CALLED AND SAID OUTERLINK WAS NOT TRACKING . THEN 15 MIN AFTER THE CALL FROM BASE, IT WAS NOTED, A SMELL OF SMOKE IN THE COCKPIT. STAN
- [SDR QMLA2009102209034](https://openairdocs.org/sdr/QMLA2009102209034), Oct 22, 2009: FITTING. CRACKED. T/R GEARBOX CASTING CRACKED, DISCOVERED DURING ROUTINE ZONE INSPECTION. T/R GBX FITTING HAD BEEN REPLACED FOR A SIMILAR CRACK 832 HRS PRIOR.
- [SDR QMLA2009081109026](https://openairdocs.org/sdr/QMLA2009081109026), Aug 11, 2009: LOCK. UNSERVICEABLE. FELT CYCLIC POP IN VERTICAL DIRECTION AT THE BOTTOM OF A SIMULATED SINGLE ENGINE LANDING FROM AN ABORTED MAXIMUM PERFORMANCE TAKEOFF PROFILE. AFTER LANDING, WAS
- [SDR 717311162007](https://openairdocs.org/sdr/717311162007), Nov 16, 2007: COMPUTER. FAILED. DURING FLIGHT, YAW CSAS CAUTION LIGHT ILLUMINATED. DIVERTED LANDING FROM HELIPAD TO AIRPORT 4 MILES AWAY. COMPLETED APPROPRIATE EMERGENCY PROCEDURE IAW AFM.

## 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 BK 117 B-1 aircraft: https://openairdocs.org/model/messerschmitt-bk-117-b-1/aircraft.md
- The Lycoming LTS-101 series engine: https://openairdocs.org/engine/lycoming-lts-101-series.md

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