# N117CH: 1987 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: 7123
- Year built: 1987
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard, transport
- Airworthiness date: November 22, 2000
- Certificate issued: February 2, 1988
- Expires: December 31, 2029
- Mode S code: A0466E
- Registered owner: [Metro Aviation Inc](https://openairdocs.org/faa-owner/METRO%20AVIATION%20INC)
- Location: [Shreveport, LA](https://openairdocs.org/faa-place/LA/Shreveport)
- Owner type: Corporation
- Owner's area on the map: 32.5252° N, 93.7502° W: Placed by OpenAirDocs: center of Shreveport, LA, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=117CH
- Page: https://openairdocs.org/aircraft/N117CH

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 N117CH.

## FAA accident and incident reports

None matched to N117CH.

## Service difficulty reports (15)

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 HDNA20230222001](https://openairdocs.org/sdr/HDNA20230222001), Feb 21, 2023: SWASHPLATE. CRACKED. DURING THE PERFORMANCE OF A DAILY AIRWORTHINESS CHECK THE MAIN ROTOR SWASHPLATE SUPPORT WAS FOUND CRACKED. CRACKS ARE NOT ALLOWED ON THIS COMPONENT.
- [SDR HDNA20150413002](https://openairdocs.org/sdr/HDNA20150413002), Apr 11, 2015: COWL LATCH. MISMANUFACTURED. AFTER REPLACING SEVERAL BROKEN NR 2 SIDE HYD LATCH HOOKS WITH AN UNREASONABLE SHORT FREQUENCY. TOOK BROKEN HOOK TO NDI SPECIALIST & INFORMED THAT LATCH WAS IMPR
- [SDR 99ZZZX2884](https://openairdocs.org/sdr/99ZZZX2884), Apr 28, 1999: INDICATOR. FLUCTUATES. NG INDICATOR FLUCTUATES. REF: MCN 63. REMOVED AND REPLACED.
- [SDR 99ZZZX1253](https://openairdocs.org/sdr/99ZZZX1253), Oct 23, 1998: INDICATOR. INOPERATIVE. NR 2 N2 NEEDLE INOPERATIVE. REMOVED AND REPLACED.
- [SDR 98ZZZX1753](https://openairdocs.org/sdr/98ZZZX1753), Mar 20, 1998: TRANSDUCER. FAILED. OIL PRESSURE TRANSDUCER FLUCTUATES AND DROPS TO ZERO. REMOVED AND REPLACED.
- [SDR 98ZZZX949](https://openairdocs.org/sdr/98ZZZX949), Jan 19, 1998: BATTERY. FAILED. BATTERY WEAK, SLOW STARTS, WILL NOT TOP CHARGE AFTER 4 HOURS. GREEN LIGHT WOULD NOT COME ON. REMOVED AND REPLACED.
- [SDR 98ZZZX268](https://openairdocs.org/sdr/98ZZZX268), Nov 25, 1997: INDICATOR. FAILED. NG INDICATOR SLOW TO INDICATE, FALLS OFF-LINE AT 5 PERCENT ON DECELERATION. REMOVED AND REPLACED.
- [SDR 98ZZZX269](https://openairdocs.org/sdr/98ZZZX269), Nov 12, 1997: INDICATOR. FAILED. NG INDICATOR SLOW TO INDICATE. FALLS OFF-LINE ON DECELERATION AT 8 PERCENT. READS ALMOST 2 PERCENT LOW. REMOVED AND REPLACED.
- [SDR 98ZZZX270](https://openairdocs.org/sdr/98ZZZX270), Nov 6, 1997: INDICATOR. FAILED. NG INDICATOR SLOW TO INDICATE AND FALLS OFF-LINE ON DECELERATION. PREVIOUSLY SENT FOR WARRANTY REPAIR ON P.O. 93129. FAILED APPROXIMATELY ONE WEEK AFTER INSTALL
- [SDR 97ZZZX1347](https://openairdocs.org/sdr/97ZZZX1347), Nov 25, 1996: TRANSCEIVER. INOPERATIVE. INOPERABLE COCKPIT VHF.
- [SDR 97ZZZX1345](https://openairdocs.org/sdr/97ZZZX1345), Nov 25, 1996: TRANSCEIVER. FAILED. TRANSCEIVER WILL NOT TRANSMIT.
- [SDR 97ZZZX1346](https://openairdocs.org/sdr/97ZZZX1346), Nov 12, 1996: TRANSCEIVER. FAILED. TRANSCEIVER WILL NOT RECEIVE. DID NOT WORK WHEN INSTALLED.
- [SDR 96ZZZX5991](https://openairdocs.org/sdr/96ZZZX5991), Oct 18, 1996: TRANSCEIVER. FAILED. TRANSCEIVER WILL NOT TRANSMIT. IN A/C ONLY 3.5 HRS BEFORE FAILURE.
- [SDR 96ZZZX5992](https://openairdocs.org/sdr/96ZZZX5992), Oct 16, 1996: TRANSCEIVER. FAILED. TRANSCEIVER WILL NOT TRANSMIT.
- [SDR 98ZZZX587](https://openairdocs.org/sdr/98ZZZX587), Jan 12, 1996: MANIFOLD. LEAKS. SUBMITTER STATES EXCESSIVE FUEL MANIFOLD LEAKS OVER THE LAST 18 MONTHS. ALLIED SIGNAL IS IN THE PROCESS OF RELEASING AN ASB LIMITING THE LIFE OF THE FUEL MANIFO

## 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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