# N117SR: 1986 MBB BK 117 A-3

- Status: Valid registration
- Airframe: [MBB BK 117 A-3](https://openairdocs.org/model/mbb-bk-117-a-3) (registry code 5626015, 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: 7084
- Year built: 1986
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Restricted, forest
- Airworthiness date: December 8, 1998
- Certificate issued: May 1, 1987
- Expires: June 30, 2027
- Mode S code: A047D4
- Registered owner: [United States Department Of Energy](https://openairdocs.org/faa-owner/UNITED%20STATES%20DEPARTMENT%20OF%20ENERGY)
- Location: [Aiken, SC](https://openairdocs.org/faa-place/SC/Aiken)
- Owner type: Government
- Owner's area on the map: 33.5316° N, 81.7251° W: Placed by OpenAirDocs: center of Aiken, SC, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=117SR
- Page: https://openairdocs.org/aircraft/N117SR

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 (MBB BK 117 A-3)

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 N117SR.

## NTSB investigations on N117SR not matched to an aircraft (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 ATL85FA272](https://openairdocs.org/ntsb/ATL85FA272), Sep 9, 1985: MBB BK-117A-1 (N117SR), Aiken, SC, substantial damage

## FAA accident and incident reports

None matched to N117SR.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## 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

## Earlier aircraft with N117SR

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N117SR before.

- [Cancelled (date not recorded)](https://openairdocs.org/deregistered/N117SR-undated): Messerschmitt BK 117, S/N 7019. N-number assigned, not yet registered

## Related

- Other MBB BK 117 A-3 aircraft: https://openairdocs.org/model/mbb-bk-117-a-3/aircraft.md
- The Lycoming LTS-101 series engine: https://openairdocs.org/engine/lycoming-lts-101-series.md

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.