Pylon
53 failure reports named the pylon in the last ten years, 107 since 1995, most often on the Mcdonnell Douglas MD-11; the condition most often found was "cracked". 3 FAA approvals let 2 companies make a replacement pylon, Lori INC holding the most (2). The reports call it "pylon", "#4 pylon".
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1995 | 4 |
| 1996 | 4 |
| 1997 | 3 |
| 1998 | 2 |
| 1999 | 1 |
| 2000 | 1 |
| 2001 | 10 |
| 2002 | 8 |
| 2003 | 3 |
| 2004 | 9 |
| 2005 | 3 |
| 2006 | 1 |
| 2009 | 1 |
| 2011 | 3 |
| 2012 | 1 |
| 2016 | 4 |
| 2019 | 1 |
| 2021 | 6 |
| 2022 | 5 |
| 2023 | 16 |
| 2024 | 6 |
| 2025 | 3 |
| 2026 | 12 |
Which system the reports file it under last ten years
Reports by system, as a table
| reports | |
|---|---|
| Airframe structure | 52 |
| Engine | 1 |
Models most often reporting it last ten years
How it failed the condition found, last ten years
Conditions found, as a table
| reports | |
|---|---|
| cracked | 10 |
| damaged | 10 |
| not reported | 10 |
| corroded | 8 |
| chafed | 4 |
| gouged | 3 |
| elongated | 2 |
| no discrepancy | 2 |
| abnormal | 1 |
| dented | 1 |
Approved replacement parts 3 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a pylon and sell it as an approved part for the models named. These are the companies holding such approvals for a pylon:
For these models most: Boeing 747 (2), Airbus A320 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Mra Systems, LLC | Pylon Kit 612C3400-099 | 612C3400-099 | Airbus A320-251NA320-252NA320-253NA321-251NA... | 2021-06-28 | current |
| Lori INC | Pylon/Mounted Precooler L8742898-1 | Airesearch Manufacturing 190992-8-1 | Boeing 747-200B, 747-200C, 747-200F | 1995-05-31 | current |
| Lori INC | PYLON/MOUNTED PRECOOLER L8742898-1 | AIRESEARCH MANUFACTURING P/N 190992-8-1 | BOEING 747-200B, 747-200C, 747-200F | 1995-05-04 | 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.