Dcu
20 failure reports named the dcu in the last ten years, 88 since 1995, most often on the Bombardier CL-600 Challenger and CRJ; the condition most often found was "failed". 2 FAA approvals let 2 companies make a replacement dcu, Rohr Inc/Dba Goodrich Aerostructures holding the most (1).
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1995 | 1 |
| 2003 | 5 |
| 2004 | 7 |
| 2005 | 6 |
| 2006 | 11 |
| 2007 | 10 |
| 2008 | 7 |
| 2009 | 1 |
| 2010 | 2 |
| 2011 | 4 |
| 2012 | 4 |
| 2013 | 4 |
| 2014 | 4 |
| 2015 | 2 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 4 |
| 2019 | 3 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 3 |
| 2026 | 1 |
Which system the reports file it under last ten years
Reports by system, as a table
| reports | |
|---|---|
| Instruments and avionics | 6 |
| Flight controls | 6 |
| Engine | 4 |
| Landing gear | 2 |
| Emergency equipment | 1 |
| Heating, ice protection and utility systems | 1 |
Models most often reporting it last ten years
How it failed the condition found, last ten years
Conditions found, as a table
| reports | |
|---|---|
| failed | 6 |
| faulted | 6 |
| false indication | 2 |
| malfunctioned | 2 |
| contaminated | 1 |
| defective | 1 |
| inoperative | 1 |
| unserviceable | 1 |
Engines most often reporting it
Approved replacement parts 2 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a dcu and sell it as an approved part for the models named. These are the companies holding such approvals for a dcu:
For these models most: Embraer ERJ 190 E190 and E195 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Rohr Inc/Dba Goodrich Aerostructures | DCU 347D5051-503 | 347D5051-503 | Embraer ERJ-190-400 | 2019-05-30 | current |
| Honeywell International US LLC | DCU (Down Converter Unit) 4088467-902 | 4088467-902 | GULFSTREAM G650 | 2012-10-11 | current |
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.