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N1174U

1988 Messerschmitt-Bolkow-Blohm BK 117 B-2 · Lycoming LTS-750-B-1

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Registered owner: Guardian Helicopters Inc
Location: Fillmore, CA
Owner type: Corporation
Serial number: 7146
Year built: 1988
Type: Rotorcraft
Engine: Turbo-shaft
Airworthiness: Standard, transport
Airworthiness date: December 19, 1998
Certificate issued: February 21, 2023
Expires: February 28, 2030
Mode S code: A0492B

Messerschmitt-Bolkow-Blohm BK 117 B-2Airframe model · 7 seats · 2 engines · 11 registered TCDS H13EUAirframe · Messerschmitt-Bolkow-Blohm BK 117 B-2 Engine modelLycoming LTS-750-B-1

From the FAA registry file of October 24, 2026.

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Airworthiness directives that may apply · 0

Matched by this aircraft’s airframe and engine models. Each AD’s applicability may narrow it by serial number, part number or equipment.

No ADs matched this aircraft’s modelsADs on appliances, propellers and installed equipment aren’t matched by model; check those separately.

Information bulletins that may apply

Advisory, not mandatory.

No bulletins matched this aircraft’s models

NTSB investigations · 1

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

NTSB CEN18LA115Accident · No injuriesLimited investigationFinal reportSheboygan, WIThe 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 malfunctions or failures that would have precluded normal…Mar 5, 2018 · Substantial damage

FAA incident reports · 1

FAA accident and incident reports matched to this aircraft by N-number and event date, checked against the reported make and model.

Accident 20180304001429ALanding: Approach · Sheboygan, WIOn March 4, 2018, about 2324 central standard time, a Messerschmitt-Bolkow-Blohm bk 117 B-2 helicopter, N1174U, operated by air methods englewood, Colorado departed fond du lac, Wisconsin (fld) enroute to st. nicholas hospital (WS56) Sheboygan, Wisconsin. The…Mar 4, 2018 · Substantial damage

Service difficulty reports · 13

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

SDR QMLA2018030418028Cyclic Control · malfunctionedPILOT 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 WENT BACK TO SYSTEM 1. NOTED TO ME THAT THE COLLECTIVE AND YAW WAS ACTING NORMAL ONLY THE CYCLIC HADMar 4, 2018 · N1174U · Bolkms BK117B2 · Main Rotor Control SDR QMLA2011060411062Indicator · fluctuatesMADE 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 TORQUE NEEDLE MATCH AT 60 PERCENT, MAX PERFORMANCE TAKEOFF TO ABOUT 150FT OGE, ENG NR2 TORQUE GAUGE DROPJun 4, 2011 · N1174U · Bolkms BK117B2 · Engine BMEP/Torque Indicating SDR QMLA2011041511047Gearbox · making metalPILOT 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 CHIP. MECHANIC THEN DRAINED THE GEAR BOX, SERVICED AND DID A 30 MINUTE GROUND RUN. INSPECTED THE CHApr 15, 2011 · N1174U · Bolkms BK117B2 · Tail Rotor Gearbox SDR QMLA2011033111040Structure · crackedCRACK DISCOVERED DURING INSPECTION ON VERTICAL FIN CAP AT STA 10950, BL 20, AND WL 4050. ACFT BEING FERRIED TO FACILITATE REPAIR.Mar 31, 2011 · N1174U · Bolkms BK117B2 · Rotorcraft Tail Boom SDR QMLA2011033111039Floor Panel · crackedCRACK DISCOVERED DURING INSP ON AFT DECK AT STA 6750, BL 500, AND WL 2620. ACFT BEING FERRIED TO FACILITATE REPAIR.Mar 31, 2011 · N1174U · Bolkms BK117B2 · Fuselage Floor Panel SDR QMLA2009121009048Bolt · misinstalledFOUND 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 UNDER THE HYD PACK. AFT HYD MOUNT ON DECK HAS WEAR IN THE BUSHING HOLES 0.100" THICK, FITTING DAMAGEDec 10, 2009 · N1174U · Bolkms BK117B2 · Standard Practices/Structures SDR QMLA2009120509045Sleeve · wornPILOT 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 HOURS. PROBLEM RETURNED. THIS TIME WE FOUND THE SLIDING SLEEVE TO BE BINDING ON THE TAIL ROTOR SHDec 5, 2009 · N1174U · Bolkms BK117B2 · Tail Rotor Drive Shaft SDR BAQA090554Brushes · arcedSTARTER GENERATOR BRUSHES STARTED ARCING AFTER ONLY 119.6 HOURS OF USE. . REPLACED WITH SERVICEABLE UNIT.Oct 30, 2003 · N1174U · Bolkms BK117B2 · Starter-Generator SDR BAQA089045Indicator · malfunctionedREQUEST 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 PERCENT AT FULL "FLY" RPM. PART ONLY LASTED 29.5 HOURS FROM THE LAST REPAIR. UNIT SENT OUT TO AEC FAug 27, 2003 · N1174U · Bolkms BK117B2 · Engine RPM Indicating System SDR BAQA088839Starter Gen · failedSTARTER GENERATOR FAILED. WOULD NOT TEST. REPLACED WITH SERVICEABLE UNIT. 9/4/03Aug 25, 2003 · N1174U · Bolkms BK117B2 · Starter-Generator SDR BAQA086455Actuator · malfunctionedCAUSING SEVERE KICKING EVEN WITH YAW-CSAS DISENGAGED. SEALS LEAKING. REPLACED WITH SERVICEABLE UNIT.May 19, 2003 · N1174U · Bolkms BK117B2 · Tail Rotor Drive System SDR BAQA085196Gyro · inoperativeSKEWED 8 DEGREES TO THE LT WHEN SPOOLED UP. REPLACED WITH SERVICEABLE UNIT.Mar 20, 2003 · N1174U · Bolkms BK117B2 · Attitude Gyro and Indicating System SDR BAQA084830Indicator · fluctuatesTRIPLE TACH NR NEEDLE INTERMITTENTLY FLUCTUATES 20-30 PERCENT. REPLACED WITH SERVICEABLE UNIT.Feb 27, 2003 · N1174U · Bolkms BK117B2 · Main Rotor Indicating System

STCs that may be installed

No STCs matched this aircraft’s modelsSTCs are matched through the model’s type certificate data sheet, and this registry model isn’t matched to one.

Earlier aircraft with this N-number · 1

This aircraft carried N1174U before the one registered now. The FAA can assign a mark to another aircraft once a registration is cancelled.

1990Cessna 172M · S/N 17266875Cancelled Oct 11, 1990 · Exported to Italy