# Kawasaki BK117B-2 - Type: Aircraft model (FAA registry) - Registry code: 4820106 - Manufacturer (registry): KAWASAKI - Model: BK117B-2 - Aircraft type: Rotorcraft - Category: Rotorcraft - Engines: 2 ยท Turbo-jet - Seats: 9 - Weight class: Up to 12,499 lb - Certification: Not type certificated - Registered aircraft: 0 - Page: https://openairdocs.org/model/kawasaki-bk117b-2 Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. ## ADs that may apply (OpenAirDocs) Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. None matched. ## Registered aircraft None registered with this model now. ## NTSB investigations None matched to aircraft with this model. ## FAA accident and incident reports None matched to aircraft with this model. ## Service difficulty reports (435, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR QMLA2026100520075](https://openairdocs.org/sdr/QMLA2026100520075), Oct 4, 2026: FUEL CAP. LOOSE. FUEL ODOR CLIMBING OUT OF AIRPORT. AFTER AN IMMEDIATE RETURN TO THE AIRPORT THE IT WAS CONFIRMED THAT THE FUEL CAP WAS SECURELY LOCKED, HOWEVER FUEL WAS VISIBLE - [SDR QMLA2025010820045](https://openairdocs.org/sdr/QMLA2025010820045), Mar 15, 2025: SKIN. CRACKED. DURING INSPECTION FOUND 2 CRACKS IN THE TOP SKIN OF THE TAILBOOM. - [SDR QMLA2024042520042](https://openairdocs.org/sdr/QMLA2024042520042), Apr 25, 2024: FUEL CAP. LOOSE. DURING TAKEOFF AND CLIMB, CREW NOTICED A FUEL SMELL AS WELL AS FUEL ON THE CLAMSHELL DOOR WINDOWS AND TAILBOOM SECTION. AIRCRAFT RETURNED TO THE AIRPORT FOR FUR - [SDR QMLA2024022520042](https://openairdocs.org/sdr/QMLA2024022520042), Apr 25, 2024: UNKNOWN. ODOR. DURING TAKEOFF AND CLIMB, CREW NOTICED A FUEL SMELL AS WELL AS FUEL ON THE CLAMSHELL DOOR WINDOWS AND TAIL BOOM SECTION. AIRCRAFT RETURNED TO THE AIRPORT FOR FU - [SDR QMLA2024030520030](https://openairdocs.org/sdr/QMLA2024030520030), Mar 5, 2024: FRAME. CRACKED. DURING SCHEDULED INSPECTION FOUND CRACK IN 11L FRAME IN TAIL BOOM AT THE 8 O'CLOCK POSITION, 31MM LONG. - [SDR QMLA2023052620040](https://openairdocs.org/sdr/QMLA2023052620040), May 8, 2023: TAIL BOOM. CRACKED. DURING VISUAL INSPECTIONS FOUND A CRACK AT THE 0900 O'CLOCK POSITION ON THE 11L FRAME OF THE TAIL BOOM. DURING DISASSEMBLY AND FURTHER INSPECTION FOUND CHAFE DA - [SDR QMLA20220202006](https://openairdocs.org/sdr/QMLA20220202006), Jan 20, 2022: UNKNOWN. ODOR. UPON STARTUP OF #1 ENGINE PILOT & CREW NOTICED AN UNUSUAL BURNING SMELL IN THE COCKPIT/CABIN OF THE AIRCRAFT. VERIFICATION THAT THE SMELL WASN'T COMING FROM OUT - [SDR QMLA2021101120051](https://openairdocs.org/sdr/QMLA2021101120051), Sep 20, 2021: TAIL BOOM. CRACKED. FOUND 16MM CRACK IN L/H SIDE OF TAIL ROTOR GEARBOX MOUNTING ACCESS HOLE ON TAILBOOM VERTCAL FIN - [SDR CA190521024](https://openairdocs.org/sdr/CA190521024), Apr 29, 2019: CHIP DETECTOR. ACTIVATED. (CAN) THE CREW WAS JUST FINISHING UP THE COLLECTIVE PITCH STOP CHECK WHEN ENG #2 CHIP ILLUMINATED. CONDUCTED THE ENG CHIP PROCEDURE AS LISTED IN THE QRH. CHIP D - [SDR HDNA2019013100001](https://openairdocs.org/sdr/HDNA2019013100001), Jan 30, 2019: WIRE HARNESS. SHORTED. DURING CRUISE FLIGHT PILOT NOTICED MASTER CAUTION FLICKERING, DETERMINED IT WAS "ENG 1 LOW" LIGHT FLICKERING, BOTH ENG INDICATIONS SOLID, NO OTHER INDICATION NO - [SDR QMLA2018081618097](https://openairdocs.org/sdr/QMLA2018081618097), Aug 16, 2018: MOUNT. CRACKED. DURING A PREFLIGHT, A CRACK WAS NOTICED NEAR UPPER LEFT CORNER OF TAIL ROTOR GEARBOX MOUNTING PAD. INVESTIGATED A POSSIBLE CRACK AND CLEANED AREA OF PAINT. INSP - [SDR QMLA2018030418028](https://openairdocs.org/sdr/QMLA2018030418028), Mar 4, 2018: CYCLIC CONTROL. MALFUNCTIONED. PILOT CLAIMED THAT IN LEVEL FLIGHT THE CYCLIC FLIGHT CONTROL WOULD NOT MOVE MORE THAN AN INCH IN ANY DIRECTION. TRIED SYSTEM 2 AND HAD THE SAME BLOCKAGE AND WEN - [SDR QMLA2018022718023](https://openairdocs.org/sdr/QMLA2018022718023), Feb 26, 2018: GEARBOX. CRACKED. THIS AIRCRAFT REMAINS OUT OF SERVICE AT THE TIME OF THIS SUBMISSION. THE AFT VERTICAL FIN SPAR WAS CLEANED TO PERFORM AD 1998-24-13. THE FOLLOWING DAY A VERY SM - [SDR QMLA2018022618022](https://openairdocs.org/sdr/QMLA2018022618022), Feb 26, 2018: MOUNT. CRACKED. THIS AIRCRAFT REMAINS OUT OF SERVICE AT THE TIME OF THIS SUBMISSION. TOP FWD ECU MOUNT TOP FIVE RIVETS SHEARED AND GUSSET CRACKED. TOP AFT MOUNT AND GUSSET FOUN - [SDR QMLA2018022618021](https://openairdocs.org/sdr/QMLA2018022618021), Feb 26, 2018: FRAME. CRACKED. WHILE COMPLETING THE A 2710 1800 HOUR INSPECTION, THE CABIN OVERHEAD CROSS FRAMES, BOTH WERE FOUND CRACKED ON THE LEFT SIDE END FLANGE AREA. THE FWD FRAME FOUND - [SDR QMLA2017101717112](https://openairdocs.org/sdr/QMLA2017101717112), Oct 17, 2017: FIRE WARNING. FALSE ACTIVATION. HEARD A SINGLE CHIME. 2 MINUTES LATER, THE CHIME RETURNED CONSTANTLY. THE NR 2 ENGINE FIRE LIGHT WAS ILLUMINATED. CHECKED INDICATIONS, STARTED A TURN AND STARTE - [SDR QMLA2017101117106](https://openairdocs.org/sdr/QMLA2017101117106), Oct 11, 2017: BLADE. CRACKED. CRACK IN THE INBOARD LEADING EDGE EROSION PROTECTIVE SHELL AT THE SPLICE JOINT, UNDER THE PU TAPE. THIS WAS FOUND DURING A SCHEDULED MAINTENANCE EVENT. THE AIRC - [SDR QMLA2017091817094](https://openairdocs.org/sdr/QMLA2017091817094), Sep 18, 2017: ENGINE. MAKING METAL. DURING CRUISE FLIGHT, THE NR 2 ENGINE CHIP LIGHT ILLUMINATED ALONG WITH MASTER CAUTION LIGHT. ATTEMPTED TO BURN CHIP IAW RFM AND CHIP DID NOT BURN. ABORTED FLIG - [SDR QMLA2017030317024](https://openairdocs.org/sdr/QMLA2017030317024), Mar 3, 2017: GOVERNOR. OUT OF ADJUST. AFTER TAKEOFF AND BEFORE REACHING CRUISE ALTITUDE, THE PILOT NOTICED THE ROTOR RPM AND ENGINE NR 1 N2 WERE ON THE HIGH SIDE (RED LINE) AND ENGINE NR 2 N2 WAS IN - [SDR QMLA2017022217021](https://openairdocs.org/sdr/QMLA2017022217021), Feb 22, 2017: SPLICE. CRACKED. CRACK FOUND IN SPLICE WHILE PERFORMING SCHEDULED MAINTENANCE ON AIRCRAFT. NO EVIDENCE OF ANY NICKS OR DAMAGE THAT MIGHT HAVE CAUSED CRACK. SUSPECT CRACK WAS CAU - [SDR HDNA724312160001](https://openairdocs.org/sdr/HDNA724312160001), Dec 29, 2016: WIRE. UNSECURE. ON STARTUP, THE NR 2 ENGINE FIRE LIGHT FLICKERED. TECHNICIAN FOUND WIRE 2WC2A20 AT PIN C ON WARNING LIGHT UNIT. REPOSITIONED AND SECURED WIRE AT WARNING LIGHT U - [SDR QMLA2016120616138](https://openairdocs.org/sdr/QMLA2016120616138), Dec 6, 2016: GEARBOX. MAKING METAL. DURING RUN UP OF AIRCRAFT FOR A FLIGHT, TAIL ROTOR CHIP LIGHT ILLUMINATED. PILOT ABORTED TAKEOFF AND CALLED MECHANIC. MECHANICS INSPECTION OF TAIL ROTOR CHIP DE - [SDR 3D9A2016102500007](https://openairdocs.org/sdr/3D9A2016102500007), Oct 24, 2016: CONNECTOR. DIRTY. MAIN TRANSMISSION NR 1 OIL PRESSURE IN YELLOW, WITH NO WARNING LIGHT. RETURNED TO BASE. CLEANED THE CONNECTOR ON THE NR 1 OIL PRESSURE TRANSDUCER. OPS CHECKED G - [SDR QMLA2016100316114](https://openairdocs.org/sdr/QMLA2016100316114), Oct 3, 2016: FIRE WARNING. ILLUMINATED. NR 2 ENGINE FIRE LIGHT ILLUMINATED. - [SDR QMLA2016092116107](https://openairdocs.org/sdr/QMLA2016092116107), Sep 21, 2016: FRAME. CRACKED. DURING AIRFRAME ZONE 6 INSPECTION, A SMALL CRACK WAS DISCOVERED IN THE TAILBOOM AFT FRAME. CRACK IS LOCATED ON THE RIGHT SIDE AT THE SMALL LIGHTENING HOLE AND I - [SDR QMLA2016090416102](https://openairdocs.org/sdr/QMLA2016090416102), Sep 4, 2016: WARNING LIGHT. INTERMITTENT. NR 2 ENGINE FIRE LIGHT ILLUMINATED INTERMITTENTLY. - [SDR QMLA2016080516090](https://openairdocs.org/sdr/QMLA2016080516090), Aug 5, 2016: GEARBOX. MAKING METAL. WHILE PERFORMING SCHEDULED INSPECTION. DISCOVERED FOUR SMALL METAL FLAKES ON INTERMEDIATE GEARBOX CHIP DETECTOR. NOT NUMEROUS OR LARGE ENOUGH TO CAUSE A CAUTION - [SDR QMLA2016052816056](https://openairdocs.org/sdr/QMLA2016052816056), May 28, 2016: WHEEL. SEIZED. AFTER COMPLETING PATIENT TRANSFER & APPROX 10 MINUTES FROM BASE, ACFT AC UNIT WAS TURNED ON. IMMEDIATELY A PECULIAR SMELL WAS NOTICED BY CREW, IN THE AFT CABIN. - [SDR QMLA201602216009](https://openairdocs.org/sdr/QMLA201602216009), Feb 22, 2016: DRAIN VALVE. FAILED. AFTER TAKEOFF, NURSE IN THE BACK THOUGHT SHE SMELLED FUEL FUMES. LANDED AT NEAREST AVAILABLE SITE, AIRPORT, WITHOUT FURTHER INCIDENT.. - [SDR HDNA201511030001](https://openairdocs.org/sdr/HDNA201511030001), Nov 3, 2015: SKIN. CRACKED. TAIL BOOM LT SIDE, JUST ABOVE THE LE OF HORIZONTAL STABILIZER CRACKED IN STIFFENER. UPON REMOVAL OF STIFFENER PN 117-30252.17 FOUND 4 ADDITIONAL CRACKS IN TAIL - [SDR QMLA2015100815094](https://openairdocs.org/sdr/QMLA2015100815094), Oct 8, 2015: RADIO. FIRE. AT APPROX 1539 HOURS ON OCTOBER 8TH 2015 ACFT EXPERIENCED AN ELEC MALFUNCTION WHICH PRODUCED SMOKE IN THE COCKPIT, NR 1 VHF RADIO FAILED. IMMEDIATELY NOTICED AN - [SDR 3D9A2015091200006](https://openairdocs.org/sdr/3D9A2015091200006), Sep 12, 2015: ENGINE. MAKING METAL. NR 1 ENGINE CHIP LIGHT ILLUMINATED IN FLIGHT. MADE PRECAUTIONARY LANDING. DISCOVERED SMALL SLIVER ON REAR BEARING SUPPORT HOUSING CHIP DETECTOR. CATEGORIZED AND - [SDR QMLA2015082715078](https://openairdocs.org/sdr/QMLA2015082715078), Aug 27, 2015: SUPPORT. CRACKED. WHILE COMPLETING TASK 26A0337-35, 12 MONTH TAIL CONE, WORN SKIN REPAIR, FOUND A CRACK ON THE FWD ECU MOUNT'S FWD SUPPORT. THE CRACK STARTS AT THE TOP OF THE SUP - [SDR QMLA2015081115069](https://openairdocs.org/sdr/QMLA2015081115069), Aug 11, 2015: O-RING. NOT SEATED. FOUND FUEL CAP ORING HAD ROLLED OFF OF ITS SEAT, RESEATED ORING & FITTED FUEL CAP. COMPLETED MX FLIGHT, FUEL CAP LEAK CHECKED GOOD. - [SDR QMLA2015070315057](https://openairdocs.org/sdr/QMLA2015070315057), Jul 3, 2015: FIRE DETECTOR. FAULTY. PILOT NOTED ENG FIRE INDICATION, FOUND FALSE INDICATION DUE TO FAULTY FIRE DETECTOR. PILOT ALSO REPORTED FIRING NR 1 FIRE BOTTLE, INSPECTION REVEALED THAT THE F - [SDR 3D9A2015062400005](https://openairdocs.org/sdr/3D9A2015062400005), Jun 24, 2015: CONNECTOR. DIRTY. NUMBER 1 ENG OIL PRESSURE GAUGE WENT TO 0 BAR INDICATION, WITH NO CORRESPONDING WARNING LIGHT. RETURNED TO BASE. CLEANED PRESSURE TRANSDUCER CONNECTOR. OPERATIO - [SDR CA150420006](https://openairdocs.org/sdr/CA150420006), Apr 7, 2015: ENGINE. MALFUNCTIONED. (CAN) DURING AN AUTOROTATION FOR INITIAL PILOT TRAINING BOTH ENGINES THROTTLES WERE RETARDED TO IDLE. IMMEDIATELY FOLLOWING THE AUTOROTATION ENTRY NR 2 ENGINE N - [SDR 3D9A201502200004](https://openairdocs.org/sdr/3D9A201502200004), Feb 20, 2015: DOUBLER. CRACKED. DURING DAILY PREFLIGHT CHECK, FOUND A 55 MM CRACK ON LEFT HAND TAIL BOOM TO VERTICAL FIN DOUBLER. - [SDR CA150118002](https://openairdocs.org/sdr/CA150118002), Jan 18, 2015: ANTENNA. UNSERVICEABLE. (CAN) DURING A DAILY INSPECTION THE ELT ANTENNA P/N ANT-406RW INSTALLED WAS DISCOVERED TO BE LOOSE AROUND THE IT`S BASE. UPON FURTHER INVESTIGATION CRACKS WERE - [SDR QMLA2015011515005](https://openairdocs.org/sdr/QMLA2015011515005), Jan 15, 2015: RAIL. CRACKED. WHILE PERFORMING AIRWORTHINESS CHECK FOUND CRACK ON RT SIDE CREST COWL RAIL AFT PORTION, LOOKED ON LT SIDE CREST COWL RAIL & FOUND ANOTHER CRACK. - [SDR CA150112015](https://openairdocs.org/sdr/CA150112015), Jan 9, 2015: MOUNT. CRACKED. (CAN) DURING THE DAILY INSPECTION THE ENGINEER NOTICED WHAT LOOKED LIKE A CRACK ON THE FORWARD VHF ANTENNA BASE MOUNT PROVISIONS. UPON DETAILED INSPECTION IT WA - [SDR 3D9A2014120600001](https://openairdocs.org/sdr/3D9A2014120600001), Dec 2, 2014: SKIN. CRACKED. 0.75 INCH CRACK ON FUSELAGE TAIL CONE SKIN UNDER TOP RIVET OF AFT UPPER ECU MOUNT DISCOVERED DURING 6000 HOUR/6 YEAR INSPECTION. - [SDR 3D9A20141206003](https://openairdocs.org/sdr/3D9A20141206003), Nov 28, 2014: FITTING. CORRODED. CORROSION FOUND UNDER RT LOWER TORQUE MOUNT FITTING ON MAIN TRANSMISSION CASE. - [SDR 3D9A2014120600002](https://openairdocs.org/sdr/3D9A2014120600002), Nov 28, 2014: FLOOR PANEL. CORRODED. CORROSION FOUND ON CABIN FLOOR SKIN AROUND THREADED INSERTS INSTALLED AS PART OF STC SR00346DE. - [SDR QMLA2014102714127](https://openairdocs.org/sdr/QMLA2014102714127), Oct 27, 2014: FIRE DETECTOR. DEFECTIVE. THE PILOT NOTED UPON POWER UP THAT THE NR 2 ENG FIRE LIGHT ILLUMINATED DIMLY. TROUBLE SHOT & FOUND A FIRE DETECTOR PROBE TO BE THE CAUSE. THIS FIRE DETECTOR WAS - [SDR QMLA2014080414098](https://openairdocs.org/sdr/QMLA2014080414098), Aug 4, 2014: UNKNOWN. ODOR. UPON DEPARTURE, SMELLED FUEL, THOUGHT POSSIBLY FROM VENT DUE TO ACFT BEING TOPPED OFF. UPON TURNING ON AIR CONDITIONER, MED CREW IN COPILOTS SEAT OBSERVED A GRA - [SDR QMLA2014080214097](https://openairdocs.org/sdr/QMLA2014080214097), Aug 2, 2014: STRUT. DAMAGED. DURING A SCHEDULED INSPECTION OF THE COMPRESSOR BLADES, AN INLET HOUSING STRUT ON THE INTAKE WAS FOUND TO HAVE A SMALL CHUNK OF METAL MISSING FROM THE TOP & BOT - [SDR QMLA2014072214088](https://openairdocs.org/sdr/QMLA2014072214088), Jul 25, 2014: SEAL. WORN. DURING DAILY AIRWORTHINESS CHECK, NOTICED EXCESSIVE NOISE & HORIZONTAL PLAY IN M/R MAST AT TRANSMISSION UPPER BEARING AREA WHEN SHAKING M/R BLADES. DURING INVES - [SDR CA140619011](https://openairdocs.org/sdr/CA140619011), Jun 19, 2014: BLADE. CRACKED. (CAN) DURING A DAILY INSPECTION OF THE T/R BLADES IT WAS NOTED THAT A HAIR LINE CRACK WAS VISBLE NEAR THE ROOT OF THE BLADE S/N 393. UPON FURTHER INVESTIGATION - [SDR 15MA20140330001](https://openairdocs.org/sdr/15MA20140330001), Mar 30, 2014: PROBE. FALSE INDICATION. UPON TAKEOFF, FIRE INDICATION ON NR 1 ENGINE FLICKERED ON AND OFF FOR 5-10 SECONDS, PILOT TURNED AND LANDED, FIRE INDICATION GONE UPON LANDING, LANDED WITHOUT I All 435: https://openairdocs.org/model/kawasaki-bk117b-2/reports.md ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Messerschmitt-Bolkow-Blohm BK 117 B-2](https://openairdocs.org/model/messerschmitt-bolkow-blohm-bk-117-b-2): 11 registered aircraft, registry code 5626013 - [Eurocopter BK117-B2](https://openairdocs.org/model/eurocopter-bk117-b2): 1 registered aircraft, registry code 8680915 --- 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.