# N1174U: 1988 Messerschmitt-Bolkow-Blohm BK 117 B-2 - Status: Valid registration - Airframe: [Messerschmitt-Bolkow-Blohm BK 117 B-2](https://openairdocs.org/model/messerschmitt-bolkow-blohm-bk-117-b-2) (registry code 5626013, 7 seats) - Engine: [Lycoming LTS-750-B-1](https://openairdocs.org/engine/lycoming-lts-750-b-1) (registry code 41564) - Data sheets: [TCDS H13EU](https://openairdocs.org/tcds/H13EU) (Airbus Helicopters Deutschland GmbH (AHD)) (OpenAirDocs) - Serial number: 7146 - Year built: 1988 - Type: Rotorcraft - Engine type: Turbo-shaft - Airworthiness: Standard, transport - Airworthiness date: December 19, 1998 - Certificate issued: February 21, 2023 - Expires: February 28, 2030 - Mode S code: A0492B - Registered owner: [Guardian Helicopters Inc](https://openairdocs.org/faa-owner/GUARDIAN%20HELICOPTERS%20INC) - Location: [Fillmore, CA](https://openairdocs.org/faa-place/CA/Fillmore) - Owner type: Corporation - Owner's area on the map: 34.4082° N, 118.8651° W: Placed by OpenAirDocs at the center of ZIP code 93015, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=1174U - Page: https://openairdocs.org/aircraft/N1174U 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. ## ADs that may apply (OpenAirDocs): 0 in force ### Matched by airframe (Messerschmitt-Bolkow-Blohm BK 117 B-2) None in force. ### Matched by engine (Lycoming LTS-750-B-1) None in force. ## Information bulletins (advisory) None matched. ## NTSB investigations (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 CEN18LA115](https://openairdocs.org/ntsb/CEN18LA115), Mar 5, 2018: Messerschmitt-Bolkow-Blohm BK 117 B-2 (N1174U), Sheboygan, WI, substantial damage. Probable cause: The restricted cyclic control movement for reasons that could not be determined because postaccident examination and testing of the cyclic control system did not reveal any evidence of mechanical… ## 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. - [Accident 20180304001429A](https://openairdocs.org/incident/20180304001429A), Mar 4, 2018: Messerschmitt-Bolkow-Blohm BK 117 B-2 (N1174U), Sheboygan, WI, Substantial damage. On March 4, 2018, about 2324 central standard time, a Messerschmitt-Bolkow-Blohm bk 117 B-2 helicopter, N1174U, operated by air methods englewood, Colorado… ## Service difficulty reports (13) 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 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 QMLA2011060411062](https://openairdocs.org/sdr/QMLA2011060411062), Jun 4, 2011: INDICATOR. FLUCTUATES. MADE THE FIRST LEG FROM BASE TO HOSPITAL, LANDED FINE, KEPT BOTH ENGINE RUNNING AT IDLE, PATIENT LOADED, READY TO GO, HOVER CHECK WITH BOTH ENG NR 1 & NR 2 TORQ - [SDR QMLA2011041511047](https://openairdocs.org/sdr/QMLA2011041511047), Apr 15, 2011: GEARBOX. MAKING METAL. PILOT REPORTED A TAIL ROTOR CHIP LIGHT FLICKER AND THE LIGHT WENT ON SOLID AT LANDING. PILOT CALLED THE MECHANIC WHO INSPECTED THE CHIP DETECTOR AND FOUND A CHI - [SDR QMLA2011033111040](https://openairdocs.org/sdr/QMLA2011033111040), Mar 31, 2011: STRUCTURE. CRACKED. CRACK DISCOVERED DURING INSPECTION ON VERTICAL FIN CAP AT STA 10950, BL 20, AND WL 4050. ACFT BEING FERRIED TO FACILITATE REPAIR. - [SDR QMLA2011033111039](https://openairdocs.org/sdr/QMLA2011033111039), Mar 31, 2011: FLOOR PANEL. CRACKED. CRACK DISCOVERED DURING INSP ON AFT DECK AT STA 6750, BL 500, AND WL 2620. ACFT BEING FERRIED TO FACILITATE REPAIR. - [SDR QMLA2009121009048](https://openairdocs.org/sdr/QMLA2009121009048), Dec 10, 2009: BOLT. MISINSTALLED. FOUND HARDWARE INSTALLED INCORRECTLY CAUSING: WEAR IN THE HYD PACK AND MOUNT HOLES. CRACKS IN THE CABIN FLOOR AND CROSS STRUCTURE SUPPORT IN THE CABIN CEILING U - [SDR QMLA2009120509045](https://openairdocs.org/sdr/QMLA2009120509045), Dec 5, 2009: SLEEVE. WORN. PILOT FELT BINDING IN TAIL ROTOR CONTROLS IN HOVER, MX IS TROUBLESHOOTING PROBLEM. REPLACED CSAS COMPUTER AND CSAS ACTUATOR PROBLEM WAS GONE FOR ABOUT 12 FLIGHT - [SDR BAQA090554](https://openairdocs.org/sdr/BAQA090554), Oct 30, 2003: BRUSHES. ARCED. STARTER GENERATOR BRUSHES STARTED ARCING AFTER ONLY 119.6 HOURS OF USE. . REPLACED WITH SERVICEABLE UNIT. - [SDR BAQA089045](https://openairdocs.org/sdr/BAQA089045), Aug 27, 2003: INDICATOR. MALFUNCTIONED. REQUEST WARRANTY REPAIR. NR 1 N2 NEEDLE READS 2 PERCENT WHEN POWERED UP. NR 1 N2 NEEDLES READS 100 PERCENT, NR 2 N2 NEEDLES READS 99 PERCENT, AND NR READS 98 PE - [SDR BAQA088839](https://openairdocs.org/sdr/BAQA088839), Aug 25, 2003: STARTER GEN. FAILED. STARTER GENERATOR FAILED. WOULD NOT TEST. REPLACED WITH SERVICEABLE UNIT. 9/4/03 - [SDR BAQA086455](https://openairdocs.org/sdr/BAQA086455), May 19, 2003: ACTUATOR. MALFUNCTIONED. CAUSING SEVERE KICKING EVEN WITH YAW-CSAS DISENGAGED. SEALS LEAKING. REPLACED WITH SERVICEABLE UNIT. - [SDR BAQA085196](https://openairdocs.org/sdr/BAQA085196), Mar 20, 2003: GYRO. INOPERATIVE. SKEWED 8 DEGREES TO THE LT WHEN SPOOLED UP. REPLACED WITH SERVICEABLE UNIT. - [SDR BAQA084830](https://openairdocs.org/sdr/BAQA084830), Feb 27, 2003: INDICATOR. FLUCTUATES. TRIPLE TACH NR NEEDLE INTERMITTENTLY FLUCTUATES 20-30 PERCENT. REPLACED WITH SERVICEABLE UNIT. ## STCs that may be installed (OpenAirDocs) None matched to this aircraft's models. ## Earlier aircraft with N1174U The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N1174U before. - [Cancelled 1990-10-11](https://openairdocs.org/deregistered/N1174U-1990-10-11): Cessna 172M, S/N 17266875. Exported to Italy ## Related - Other Messerschmitt-Bolkow-Blohm BK 117 B-2 aircraft: https://openairdocs.org/model/messerschmitt-bolkow-blohm-bk-117-b-2/aircraft.md - The Lycoming LTS-750-B-1 engine: https://openairdocs.org/engine/lycoming-lts-750-b-1.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.