# N911MZ: 1986 Messerschmitt-Bolkow-Blohm BK 117 A-4, registration cancelled 2017-12-20 - Type: Cancelled registration (FAA registry, deregistered aircraft) - Cancelled: December 20, 2017 - Exported to: New Zealand - Status when cancelled: First 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: 7098 - Year built: 1986 - Type of aircraft: Rotorcraft - Engine type: Turbo-shaft - Airworthiness: Standard, transport - Airworthiness date: March 25, 2003 - Certificate issued: March 24, 2015 - Last registry action: December 5, 2017 - Mode S code: AC9B8D - Owner when cancelled: [Air Methods Corp](https://openairdocs.org/faa-owner/AIR%20METHODS%20CORP) - Location: [Greenwood Village, CO](https://openairdocs.org/faa-place/CO/Greenwood%20Village) - Owner type: Corporation - 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 was based - The mark today: https://openairdocs.org/aircraft/N911MZ - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=911MZ - Page: https://openairdocs.org/deregistered/N911MZ-2017-12-20 From the FAA registry file of October 29, 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 (30) Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. - [SDR QMLA2016110116120](https://openairdocs.org/sdr/QMLA2016110116120), Nov 1, 2016: ELEC CONNECTOR. CONTAMINATED. CREW MEMBER REPORTED FUEL ODOR DURING GROUND OPERATIONS. THE PILOT SHUTDOWN THE ENGINES AND CALLED THE MECHANIC OUT TO INSPECT THE AIRCRAFT. REMOVED THE CENTER - [SDR QMLA2016103016119](https://openairdocs.org/sdr/QMLA2016103016119), Oct 30, 2016: B-NUT. LEAKING. THE PILOT AND MEDICAL CREW SMELLED A STRONG FUEL ODOR WITHIN THE CABIN OF THE AIRCRAFT. THE MECHANIC WAS CALLED OUT TO INSPECT THE AIRCRAFT AND FOUND A FUEL LIN - [SDR QMLA2016052016052](https://openairdocs.org/sdr/QMLA2016052016052), May 20, 2016: CHIP DETECTOR. CONTAMINATED. NUMBER 2 ENG CHIP LIGHT IN CRUISE, WOULD NOT EXTINGUISH WITH 3 ZAPS. SHUTDOWN NR 2 ENG IAW ACFT EMER PROCEDURE CHECKLIST. UPON ARRIVAL, INSPECTED THE CHIP DETEC - [SDR QMLA2015071715059](https://openairdocs.org/sdr/QMLA2015071715059), Jul 17, 2015: FIRE WARNING. FALSE ACTIVATION. THE NR 2 FIRE WARNING LIGHT WAS GLOWING VERY DIMLY. DID NOT NOTICE THE FIRE LIGHT WAS ON UNTIL THE OTHER COCKPIT LIGHTS WERE DIMMED FOR SHUTDOWN. THERE WAS NO E - [SDR QMLA2015062615053](https://openairdocs.org/sdr/QMLA2015062615053), Jun 26, 2015: MOUNT FITTING. WORN. NUMBER 2 INBD FWD ENG MOUNT FITTING BUSHING WORN & ELONGATED, REQUIRING REPAIR SCHEME. REPAIR COMPLETED WITH FORM 337 DATED 07 07 2015. - [SDR QMLA2015031915019](https://openairdocs.org/sdr/QMLA2015031915019), Mar 19, 2015: FIRE WARNING. FALSE ACTIVATION. NUMBER 2 ENG FIRE LIGHT ILLUMINATED IN FLIGHT WITH NO FIRE. ACFT LANDED WITHOUT INCIDENT. NR 2 ENG FIRE DETECTOR SYS INSPECTED & TESTED, NO FAULTS FOUND, COULD - [SDR UNFR2011052500003](https://openairdocs.org/sdr/UNFR2011052500003), May 23, 2011: SKIN. MISREPAIRED. PERFORMING INSP ON TAILBOOM AND DISCOVERED RIVETS IN TAILBOOM THAT WERE NOT CORRECTLY INSTALLED AT PREVIOUS REPAIR ON TOP SKIN BECAUSE OF DIMPLES IN SKIN DID NO - [SDR RMXA051220097098](https://openairdocs.org/sdr/RMXA051220097098), May 12, 2009: FRAME. CRACKED. DURING SCHEDULED MAINTENANCE, A 1 INCH LONG CRACK WAS DISCOVERED IN THE FUSELAGE TAILCONE LT A FRAME PT NR 117-22106-01. - [SDR TI1R001477](https://openairdocs.org/sdr/TI1R001477), Mar 13, 2001: CLOCK. DEFECTIVE. CLOCK 8 DAY - CLOCK WORKS FOR 30 TO 90 MINUTES AND THEN STOPS. REMOVED AND REPLACED. - [SDR 99ZZZX2561](https://openairdocs.org/sdr/99ZZZX2561), Jun 3, 1999: O-RING. LEAKING. TROUBLESHOT SYSTEM PER ENGINE MM. FOUND AIR LEAK ON TEMP COMPENSATOR. REMOVED 5 O-RINGS, PN M8324811-904. INSTALLED 5 NEW O-RINGS, P/N SAME. PERFORMED 7 GROUND - [SDR 98ZZZX1883](https://openairdocs.org/sdr/98ZZZX1883), Apr 24, 1998: SENSOR. FAILED. INDICATION FAILURE. TROUBLESHOOT TO NG PICKUP. INSTALLED NEW PICKUP, OPS CHECK GOOD. - [SDR 98ZZZX283](https://openairdocs.org/sdr/98ZZZX283), Nov 13, 1997: COMPUTER. FAILED. CSAS COMPUTER CAUSES FLUCTUATIONS IN PITCH ACTUATOR. NOISY SIGNAL COMING OUT OF PINS 18 AND 19. REMOVED AND REPLACED. - [SDR 98ZZZX282](https://openairdocs.org/sdr/98ZZZX282), Nov 13, 1997: ARTIFICIAL HORIZ. NOISY. ARTIFICIAL HORIZ CAUSES CSAS PITCH ACTUATOR TO FLUCTUATE. SIGNAL OUT OF PINS, X AND Y ARE TOO NOISY SIMULATING PITCH UP OR DOWN. REMOVED AND REPLACED. - [SDR 97ZZZX5132](https://openairdocs.org/sdr/97ZZZX5132), Nov 1, 1997: CONTROL. OVERHEAT. INSPECTED RHEOSTAT, WIRING, AND INTENSITY CONTROL UNIT. FOUND CONTROL UNIT TO HAVE STRONG ELECTRICAL ODOR. REPLACED WITH NEW UNIT. OPS CHECK GOOD. - [SDR 97ZZZX5056](https://openairdocs.org/sdr/97ZZZX5056), Oct 19, 1997: INDICATOR. DEFECTIVE. BAD INPUTS TO YAW CSAS. NOTE: RED IMPACT INDICATOR. REMOVED AND REPLACED. - [SDR 98ZZZX569](https://openairdocs.org/sdr/98ZZZX569), Oct 7, 1997: 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 - [SDR 98ZZZX570](https://openairdocs.org/sdr/98ZZZX570), Sep 13, 1997: 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 - [SDR 97ZZZX3617](https://openairdocs.org/sdr/97ZZZX3617), Apr 1, 1997: COMPUTER. MALFUNCTION. PITCH AND ROLL CSAS CAUTION LIGHT ILLUMINATED INTERMITTENTLY. - [SDR 97ZZZX1342](https://openairdocs.org/sdr/97ZZZX1342), Jan 17, 1997: GYRO HORIZON. INOPERABLE. GYRO HORIZ PITCH AND ROLL CSAS INOPERABLE. - [SDR 97ZZZX1343](https://openairdocs.org/sdr/97ZZZX1343), Jan 4, 1997: COMPUTER. FAILED. YAW COMPUTER HAD EHA FAILED IN FULL RETRACT POSITION. - [SDR 97ZZZX1340](https://openairdocs.org/sdr/97ZZZX1340), Jan 2, 1997: GYRO HORIZON. FAILED. HORIZON STARTED SPINNING AND TUMBLING IN-FLIGHT. - [SDR 97ZZZX1341](https://openairdocs.org/sdr/97ZZZX1341), Dec 13, 1996: INDICATOR. DEFECTIVE. INDICATOR TESTS PASSED THE CALIBRATION LINE. - [SDR 98ZZZX583](https://openairdocs.org/sdr/98ZZZX583), Dec 2, 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 - [SDR 96ZZZX5770](https://openairdocs.org/sdr/96ZZZX5770), Sep 22, 1996: TRANSCEIVER. INOPERATIVE. INOP WHEN INSTALLED IN A/C - WILL NOT TRANSMIT. - [SDR 96ZZZX5842](https://openairdocs.org/sdr/96ZZZX5842), Aug 24, 1996: TRIPLE TACH. INTERMITTENT. INTERMITTENT N2 - NR 2 DROP OF 2 PERCENT AT 100 PERCENT. - [SDR 96ZZZX4674](https://openairdocs.org/sdr/96ZZZX4674), Jun 27, 1996: TRANSCEIVER. DEFECTIVE. TRANSCEIVER WILL NOT TRANSMIT CLEAR, BUT RECEIVES OK. PART WAS JUST IN FOR REPAIR 5-14-96. - [SDR 96ZZZX3671](https://openairdocs.org/sdr/96ZZZX3671), Jun 19, 1996: INDICATOR. DEFECTIVE. TRANSMITTER FAULT. RADAR SENSOR. COLOR RADAR INDICATOR. - [SDR 96ZZZX3670](https://openairdocs.org/sdr/96ZZZX3670), Jun 19, 1996: SENSOR. DEFECTIVE. TRANSMITTER FAULT. RADAR SENSOR. COLOR RADAR INDICATOR. - [SDR 96ZZZX3669](https://openairdocs.org/sdr/96ZZZX3669), May 25, 1996: TRANSCEIVER. FAILED. VHF-FM HI BAND RADIO WILL NOT TRANSMIT OR RECEIVE. REMOVED AND REPLACED. - [SDR 96ZZZX3667](https://openairdocs.org/sdr/96ZZZX3667), Apr 2, 1996: GYRO. DEFECTIVE. ON INSTALLATION, GYRO UNIT WAS SLOW TO SPIN-UP AND GRADE-OFF. REMOVED AND REPLACED. ## Other aircraft with N911MZ - [Registered now](https://openairdocs.org/aircraft/N911MZ): Sling SLING LSA, S/N 365A, built 2023 --- 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.