Type Record · As of May 3, 2026
MESSERSCHMITT-BOLKOW-BLOHM BK 117 A-4
Rotorcraft · LYCOMING LTS-101 SER
Registered
1
NTSB Events
0
Airworthiness Directives
0
Aircraft Resources
01 / Distribution
Where the fleet lives and was built
Counts of currently-registered MESSERSCHMITT-BOLKOW-BLOHM BK 117 A-4 aircraft by US state and decade of manufacture, sourced from the FAA Aircraft Registry.
By State (top 10)
- UT 100.0% 1
By Decade of Manufacture
- Unknown 100.0% 1
02 / NTSB Records
Events involving MESSERSCHMITT-BOLKOW-BLOHM BK 117 A-4 aircraft
No NTSB-recorded events match MESSERSCHMITT-BOLKOW-BLOHM BK 117 A-4 in the indexed corpus.
02b / NASA ASRS Reports
Near-miss reports involving MESSERSCHMITT-BOLKOW-BLOHM BK 117 A-4
NASA's voluntary, confidential reporting system surfaces what almost went wrong. 2 de-identified ASRS reports reference this airframe. Pilot-written narrative. ASRS reports are voluntary and not investigated — they represent the reporter's perspective and cannot infer prevalence.
- ACN 2008212 Emergency Medical Service Incidents
MBB-BK117 pilot reported the rotor wash of the helicopter while performing a hover taxi over the taxiway caused a nearby aircraft that was fueling to move. The other aircraft did not have a parking br
MBB-BK 117 All Series
- ACN 1895808 Emergency Medical Service Incidents
Helicopter Captain reported while attempting to land on the helipad, a person was standing near the landing area, requiring the pilot to execute a missed approach and go- around.
MBB-BK 117 All Series
03 / Airworthiness Directives
FAA directives applicable to MESSERSCHMITT-BOLKOW-BLOHM BK 117 A-4
No matching airworthiness directives are on file for this make and model in the Federal Register.
07 / PMA replacement parts
FAA-approved replacement parts for MESSERSCHMITT-BOLKOW-BLOHM BK 117 A-4
60+ parts on file from the FAA Parts Manufacturer Approval database. Each is a non-OEM part the FAA has authorized for use as a replacement on this aircraft type.
-
DeVore Dwg. 11700002 Rev. A dated 11-4-88 or later FAA Approved Revision#https://drs.faa.gov/browse/excelExternalWindow/FCF87B6D3A2495858625740500621357.0001##
Forward Facing Recognition Light Installation
Devore Aviation Corp of America replaces Modification Part
PMA holder → -
DeVore Dwg. 11700001 Rev. C dated 11-4-88 or later FAA Approved Revision#https://drs.faa.gov/browse/excelExternalWindow/3187642D9D387478862574050062131F.0001##
Tail Rotor Floodlight Installation
Devore Aviation Corp of America replaces Modification Part
PMA holder → -
MDL-020398#https://drs.faa.gov/browse/excelExternalWindow/C111AB478C85C376862572C800506B3E.0001##
Medical Subfloor
Air Methods Corp International replaces Modification Part
PMA holder → -
RMHD50070-2WP#https://drs.faa.gov/browse/excelExternalWindow/6272892613F63A31862572C80051CD29.0001##
Panel, door, upper, right side
Air Methods Corp International replaces 50070-2WP
PMA holder → -
RMHD50070-2W#https://drs.faa.gov/browse/excelExternalWindow/C805F33D5828C08A862572C80051CD06.0001##
Panel assembly, door, upper, right side
Air Methods Corp International replaces 50070-2W
PMA holder → -
RMHD50070-1W#https://drs.faa.gov/browse/excelExternalWindow/50A5D6578BEBF487862572C80051CCD9.0001##
Panel assembly, door, upper, left side
Air Methods Corp International replaces 50070-1W
PMA holder → -
RMHD50067-1WP#https://drs.faa.gov/browse/excelExternalWindow/5553F6F3EA861EFF862572C80051CCC3.0001##
Panel, door lower, right side
Air Methods Corp International replaces 50067-1WP
PMA holder → -
RMHD50070-1WP#https://drs.faa.gov/browse/excelExternalWindow/513F72ED2B5B7165862572C80051CCF1.0001##
Panel, door, upper, left side
Air Methods Corp International replaces 50070-1WP
PMA holder → -
RMHD50066-11W#https://drs.faa.gov/browse/excelExternalWindow/8ADC4A512650779D862572C80051CC82.0001##
Panel assembly, door, lower, left side
Air Methods Corp International replaces 50066-11W
PMA holder → -
RMHD50067-1W#https://drs.faa.gov/browse/excelExternalWindow/6079F07E37CA66E6862572C80051CCAD.0001##
Panel assembly, door, lower, right side
Air Methods Corp International replaces 50067-1W
PMA holder → -
RMHD50056-111WB#https://drs.faa.gov/browse/excelExternalWindow/714286858B0D2307862572C80051CBF8.0001##
Sound blanket, cargo joint
Air Methods Corp International replaces 50056-111WB
PMA holder → -
RMHD50066-11WP#https://drs.faa.gov/browse/excelExternalWindow/B531FA88A6AB8B9F862572C80051CC99.0001##
Panel, door, lower, left side
Air Methods Corp International replaces 50066-11WP
PMA holder → -
RMHD50056-112W#https://drs.faa.gov/browse/excelExternalWindow/C74A9B801022811D862572C80051CC17.0001##
Panel assembly, right side, cargo joint
Air Methods Corp International replaces 50056-112W
PMA holder → -
RMHD50056-112WP#https://drs.faa.gov/browse/excelExternalWindow/73F25E3616B231B5862572C80051CC38.0001##
Panel, right side, cargo joint
Air Methods Corp International replaces 50056-112WP
PMA holder → -
RMHD50056-111WP#https://drs.faa.gov/browse/excelExternalWindow/8B47EE27A626F636862572C80051CBD9.0001##
Panel, left side, cargo joint
Air Methods Corp International replaces 50056-111WP
PMA holder → -
RMHD50056-111W#https://drs.faa.gov/browse/excelExternalWindow/1FF738495A9EF3D1862572C80051CBB8.0001##
Panel assembly, left side, cargo joint
Air Methods Corp International replaces 50056-111W
PMA holder → -
RMHD50046-111WB#https://drs.faa.gov/browse/excelExternalWindow/6699BDAD3DEC36DF862572C80051CAD9.0001##
Sound blanket, access, left side
Air Methods Corp International replaces 50046-111WB
PMA holder → -
RMHD50055-111W#https://drs.faa.gov/browse/excelExternalWindow/D6D32441BC77CE9E862572C80051CB5C.0001##
Panel assembly, cargo ceiling joint
Air Methods Corp International replaces 50055-111W
PMA holder → -
RMHD50055-111WP#https://drs.faa.gov/browse/excelExternalWindow/A23CF1F473D96216862572C80051CB75.0001##
Panel cargo ceiling joint
Air Methods Corp International replaces 50055-111WP
PMA holder → -
RMHD50055-111WB#https://drs.faa.gov/browse/excelExternalWindow/EC0E613088B5FEB2862572C80051CB94.0001##
Sound blanket, cargo ceiling joint
Air Methods Corp International replaces 50055-111WB
PMA holder → -
RMHD50046-111WP#https://drs.faa.gov/browse/excelExternalWindow/0BAEF3AD247F9385862572C80051CABD.0001##
Panel, access, left side
Air Methods Corp International replaces 50046-111WP
PMA holder → -
RMHD50046-111W#https://drs.faa.gov/browse/excelExternalWindow/DA73B79FDFE6CAC0862572C80051CAFB.0001##
Panel assembly, access left side
Air Methods Corp International replaces 50046-111W
PMA holder → -
RMHD50046-112W#https://drs.faa.gov/browse/excelExternalWindow/3A04EDEE96D1D1F0862572C80051CA89.0001##
Panel, assembly, access, right side
Air Methods Corp International replaces 50046-112W
PMA holder → -
RMHD50045-112WP#https://drs.faa.gov/browse/excelExternalWindow/09EC670D51344D44862572C80051CA62.0001##
Panel, access, left side
Air Methods Corp International replaces 50045-112WP
PMA holder → -
RMHD50045-111WP#https://drs.faa.gov/browse/excelExternalWindow/F1582F8E3C2682E6862572C80051CA28.0001##
Panel, access, right side
Air Methods Corp International replaces 50045-111WP
PMA holder → -
RMHD50045-112W#https://drs.faa.gov/browse/excelExternalWindow/A7A17DCBEA575F79862572C80051CA41.0001##
Panel assembly, access, left side
Air Methods Corp International replaces 50045-112W
PMA holder → -
RMHD50045-111W#https://drs.faa.gov/browse/excelExternalWindow/42F8BC1EDBA44F51862572C80051CA14.0001##
Panel assembly, access, right side
Air Methods Corp International replaces 50045-111W
PMA holder → -
RMHD50043-112WB#https://drs.faa.gov/browse/excelExternalWindow/EDD2EA570A86D0E5862572C80051C9A5.0001##
Sound blanket, right side lower cargo
Air Methods Corp International replaces 50043-112WB
PMA holder → -
RMHD50044-2WP#https://drs.faa.gov/browse/excelExternalWindow/20FD4F444629A130862572C80051C9FE.0001##
Panel, skirting, right side
Air Methods Corp International replaces 50044-2WP
PMA holder → -
RMHD50044-1W#https://drs.faa.gov/browse/excelExternalWindow/30F80B67B26EF04C862572C80051C9BB.0001##
Panel assembly, skirting, left side
Air Methods Corp International replaces 50044-1W
PMA holder → -
RMHD50044-2W#https://drs.faa.gov/browse/excelExternalWindow/D657529E1B5A72F4862572C80051C9E6.0001##
Panel assembly, skirting, right side
Air Methods Corp International replaces 50044-2W
PMA holder → -
RMHD50044-1WP#https://drs.faa.gov/browse/excelExternalWindow/CD5A22E5569076CB862572C80051C9D2.0001##
Panel, skirting, left side
Air Methods Corp International replaces 50044-1WP
PMA holder → -
RMHD50043-112W#https://drs.faa.gov/browse/excelExternalWindow/54D9859817F6D733862572C80051C970.0001##
Panel assembly, right side lower cargo
Air Methods Corp International replaces 50043-112W
PMA holder → -
RMHD50043-112WP#https://drs.faa.gov/browse/excelExternalWindow/3697FCF54E5EC8ED862572C80051C98F.0001##
Panel, right side lower cargo
Air Methods Corp International replaces 50043-112WP
PMA holder → -
RMHD50043-111WP#https://drs.faa.gov/browse/excelExternalWindow/F7E972385C6C59A9862572C80051C942.0001##
Panel, left side lower cargo
Air Methods Corp International replaces 50043-111WP
PMA holder → -
RMHD50043-111WB#https://drs.faa.gov/browse/excelExternalWindow/35178C196DA29701862572C80051C958.0001##
Sound blanket, left side lower cargo
Air Methods Corp International replaces 50043-111WB
PMA holder → -
RMHD50042-112WB-4#https://drs.faa.gov/browse/excelExternalWindow/C168DC3BFD6B740B862572C80051C917.0001##
Sound blanket, right side, upper cargo
Air Methods Corp International replaces 50042-112WB-4
PMA holder → -
RMHD50043-111W#https://drs.faa.gov/browse/excelExternalWindow/6EB76CF0A3ED8C3A862572C80051C92D.0001##
Panel assembly, left side lower cargo
Air Methods Corp International replaces 50043-111W
PMA holder → -
RMHD50042-112WB-3#https://drs.faa.gov/browse/excelExternalWindow/43DE23D2CC387EF8862572C80051C901.0001##
Sound blanket, right side, upper cargo
Air Methods Corp International replaces 50042-112WB-3
PMA holder → -
RMHD50042-112WB-2#https://drs.faa.gov/browse/excelExternalWindow/9E5846E1565E70AE862572C80051C8EB.0001##
Sound blanket, right side, upper cargo
Air Methods Corp International replaces 50042-112WB-2
PMA holder →
+ 20 more PMA parts on file
04 / Regulations watching this type
Advisory Circulars and Federal Register activity for MESSERSCHMITT-BOLKOW-BLOHM BK 117 A-4
Advisory Circulars
No ACs explicitly mention this type. Showing universal operating-rule ACs that apply to all aircraft.
Recent Federal Register activity
Latest rulemakings touching general operating rules (Part 91) and maintenance rules (Part 43).
- 2026-04-17 Settlement Policy for Small Unmanned Aircraft System (UAS) Cases FR ↗
- 2026-02-10 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period; Denial of Extension FR ↗
- 2026-02-02 25-Hour Cockpit Voice Recorder (CVR) Requirement, New Aircraft Production FR ↗
- 2026-01-28 Normalizing Unmanned Aircraft Systems Beyond Visual Line of Sight Operations; Reopening of Comment Period FR ↗
- 2026-01-07 Requirements for Interference-Tolerant Radio Altimeter Systems FR ↗
05 / Aircraft of this type
All 1 registered N-numbers
Every tail currently on the FAA registry for this make/model. Click an N-number to query the FAA Aircraft Inquiry; rows flagged ● have NTSB events on file. Tails seeded with full TallyAero pages link directly.
| N-number | St | Year | NTSB | FAA |
|---|---|---|---|---|
| N485UH | UT | — | · | Look up ↗ |
Source — FAA Aircraft Registry · click "Look up" to query the live registry record (owner, address, last airworthiness)
05 / Sources & Methodology
Every count traces back to a primary US-government source
- FAA Aircraft Registry →
Refreshed Apr 27, 2026
Available
- NTSB CAROL →
Refreshed Apr 27, 2026
Available
- Federal Register (FAA Airworthiness Directives) →
Refreshed Apr 27, 2026
Available
We render counts and lists as the agency publishes them. Read the methodology →