# N527MB: 1986 Messerschmitt-Bolkow-Blohm BK 117 A-4, registration cancelled 2016-07-22 - Type: Cancelled registration (FAA registry, deregistered aircraft) - Cancelled: July 22, 2016 - Status when cancelled: Third renewal notice - Airframe: [Messerschmitt-Bolkow-Blohm BK 117 A-4](https://openairdocs.org/model/messerschmitt-bolkow-blohm-bk-117-a-4) (registry code 5626017) - 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), [TCDS E5NE](https://openairdocs.org/tcds/E5NE) (OpenAirDocs) - Serial number: 7103 - Year built: 1986 - Type of aircraft: Rotorcraft - Engine type: Turbo-shaft - Airworthiness: Standard, transport - Airworthiness date: July 19, 2005 - Certificate issued: July 8, 1998 - Last registry action: November 23, 2011 - Mode S code: A6A404 - Owner when cancelled: [Omniflight Helicopters Inc](https://openairdocs.org/faa-owner/OMNIFLIGHT%20HELICOPTERS%20INC) - Location: [Englewood, CO](https://openairdocs.org/faa-place/CO/Englewood) - Owner type: Corporation - Owner's area on the map: 39.5732° N, 104.8649° W: Placed by OpenAirDocs at the center of ZIP code 80112, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based - The mark today: https://openairdocs.org/aircraft/N527MB - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=527MB - Page: https://openairdocs.org/deregistered/N527MB-2016-07-22 From the FAA registry file of October 28, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe. ADs and bulletins for the Messerschmitt-Bolkow-Blohm BK 117 A-4: https://openairdocs.org/model/messerschmitt-bolkow-blohm-bk-117-a-4.md ## Service difficulty reports (20) Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. - [SDR QMLD201110052601](https://openairdocs.org/sdr/QMLD201110052601), Oct 5, 2011: RIB. CRACKED. THE TOP RIB OF THE VERTICAL FIN WHERE THE ANTI COLLOSION LIGHT BASE IS MOUNTED, EXIBITS A CRACK RADIATING FROM THE NUTPLATE THAT IS MOUNTED UNDERNEATH. - [SDR RMXA072820107103](https://openairdocs.org/sdr/RMXA072820107103), Jul 28, 2010: SKIN. CRACKED. DURING MX A 1" LONG CRACK WAS DISCOVERED IN THE TAILBOOM VERTICAL FIN OUTER SKIN STARTING FROM AN ACCESS OPENING AT THE UPPER END OF THE VERTICAL FIN. REPAIR SC - [SDR RMXA032320097103](https://openairdocs.org/sdr/RMXA032320097103), Mar 23, 2009: FITTING. CRACKED. DURING A DAILY INSPECTION, THE TAIL ROTOR GEARBOX MOUNT FITTING WAS DISCOVERED CRACKED. - [SDR 04222008](https://openairdocs.org/sdr/04222008), Apr 22, 2008: SUPPORT BRACKET. LOOSE. DURING SCHEDULED INSPECTION, A TAIL ROTOR CONTROL TUBE SUPPORT MOUNT WAS FOUND LOOSE INSIDE THE TAILCONE DUE TO WORKING RIVETS. - [SDR TI1R001485](https://openairdocs.org/sdr/TI1R001485), Jun 1, 2001: INDICATOR. INOPERATIVE. INDICATOR NG - NEEDLE DOES NOT MOVE. REMOVED AND REPLACED. - [SDR TI1R001400](https://openairdocs.org/sdr/TI1R001400), Jan 23, 2001: CONTROL UNIT. FAULTY. CONTROL UNIT - SHUTS DOWN ON FULL BRIGHT. REMOVED AND REPLACED. - [SDR 20000721SH029](https://openairdocs.org/sdr/20000721SH029), Jun 10, 2000: ENGINE. MAKING METAL. INSPECTED NR 2 ENGINE CHIP DETECTOR AND FOUND NO SIGN OF CHIPS OR DEBRIS. CLEARED CHIP PLUG AND REINSERTED INTO HOUSING. PILOT PERFORMED A GROUND RUN OF THE NR - [SDR 20000413SH040](https://openairdocs.org/sdr/20000413SH040), Jan 13, 2000: INDICATOR. FLUCTUATES. INDICATOR FLUCTUATES UNDER POWER. REMOVED AND REPLACED. (X) - [SDR 20000413SH041](https://openairdocs.org/sdr/20000413SH041), Jan 12, 2000: INDICATOR. DAMAGED. NG INDICATOR TRIPPED CIRCUIT BREAKER WHEN INSTALLED AFTER REPAIR. REMOVED AND REPLACED. (X) - [SDR 99ZZZX3281](https://openairdocs.org/sdr/99ZZZX3281), Aug 10, 1999: PUMP. FAILED. MED VAC PUMP MOTOR SEIZING-UP CAUSING SMOKE AND FUMES IN COCKPIT WHICH CREATED AN EMERGENCY LANDING. REPLACED WITH SERVICEABLE VAC PUMP ASSY. FUNCTIONAL CHECK O - [SDR 99ZZZX3357](https://openairdocs.org/sdr/99ZZZX3357), Oct 7, 1998: ROD END. WORN. BEARING WORN ON ROD END. REMOVED AND REPLACED. - [SDR 99ZZZX3356](https://openairdocs.org/sdr/99ZZZX3356), Oct 7, 1998: ROD END. WORN. BEARING WORN. REMOVED AND REPLACED. - [SDR 99ZZZX911](https://openairdocs.org/sdr/99ZZZX911), Sep 28, 1998: INDICATOR. FAILED. NR 2 NEEDLE ON TACHOMETER INDICATOR STAYS AT ZERO, NR 1 NEEDLE RUNS 15 PERCENT LOW, AND ROTOR NEEDLE RUNS 4-5 PERCENT HIGH. REMOVED AND REPLACED. - [SDR 99ZZZX905](https://openairdocs.org/sdr/99ZZZX905), Aug 28, 1998: STARTER. DAMAGED. DRIVE DAMPER BROKEN. REMOVED AND REPLACED. - [SDR 98ZZZX335](https://openairdocs.org/sdr/98ZZZX335), Dec 8, 1997: VALVE. FAILED. VALVE INOPERATIVE. REMOVED AND REPLACED. - [SDR 97ZZZX5055](https://openairdocs.org/sdr/97ZZZX5055), Oct 16, 1997: INDICATOR. FAILED. CIRCUIT BREAKER TRIPS. INDICATOR HAS INTERNAL SHORT. REMOVED AND REPLACED. - [SDR 97ZZZX3591](https://openairdocs.org/sdr/97ZZZX3591), Jun 17, 1997: COMPUTER. FAILED. SPAS COMPUTER CAUTION LIGHT ILLUMINATES INTERMITTENTLY IN-FLIGHT. UNIT FAILED AFTER ONLY 178 HOURS. REMOVED AND REPLACED. (X) - [SDR 96ZZZX4670](https://openairdocs.org/sdr/96ZZZX4670), Jun 17, 1996: GENERATOR. ARMATURE SCORED. START/GENERATOR ARMATURE SCORED DUE TO BRUSH HOLDER BENT. - [SDR 96ZZZX3173](https://openairdocs.org/sdr/96ZZZX3173), Apr 26, 1996: GYRO. FAILED. SLOW TO OPERATE, PULL THREE OR FOUR TIMES TO ERECT. REPAIR AS NECESSARY. - [SDR RMXA9520591](https://openairdocs.org/sdr/RMXA9520591), Mar 26, 1995: BELLCRANK ASSY. BEARING WORN. TEFLON BEARING IS WORN. REMOVED AND REPLACED. ## 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 19970819028159I](https://openairdocs.org/incident/19970819028159I), Aug 19, 1997: Bolkms BK117A3 (N527MB), Florence, SC, Minor damage. Southwest of airport bird shattered windscreen. Went thru and shattered aft greenhouse. Found only bird feathers. --- 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.