Warning Unit
27 failure reports named the warning unit in the last ten years, 38 since 1995, most often on the Messerschmitt-Bolkow-Blohm BK 117; the condition most often found was "defective".
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1995 | 2 |
| 1996 | 2 |
| 1997 | 1 |
| 1998 | 4 |
| 1999 | 2 |
| 2016 | 3 |
| 2017 | 1 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 5 |
| 2022 | 2 |
| 2023 | 6 |
| 2024 | 5 |
| 2025 | 2 |
| 2026 | 1 |
Which system the reports file it under last ten years
Instruments and avionics9Rotorcraft systems9Airframe structure3Emergency equipment2Engine2Flight controls1Landing gear1
Reports by system, as a table
| reports | |
|---|---|
| Instruments and avionics | 9 |
| Rotorcraft systems | 9 |
| Airframe structure | 3 |
| Emergency equipment | 2 |
| Engine | 2 |
| Flight controls | 1 |
| Landing gear | 1 |
Models most often reporting it last ten years
How it failed the condition found, last ten years
defective8inoperative5failed3unserviceable3faulted2faulty2bent1burned1malfunctioned1no test1
Conditions found, as a table
| reports | |
|---|---|
| defective | 8 |
| inoperative | 5 |
| failed | 3 |
| unserviceable | 3 |
| faulted | 2 |
| faulty | 2 |
| bent | 1 |
| burned | 1 |
| malfunctioned | 1 |
| no test | 1 |
Engines most often reporting it
Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.