Labyrinth Seal
2 failure reports named the labyrinth seal in the last ten years, 20 since 1996, most often on the Boeing 737; the condition most often found was "cracked". 4 FAA approvals let 2 companies make a replacement labyrinth seal, Qualiseal Technology holding the most (3).
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1996 | 2 |
| 1999 | 1 |
| 2001 | 1 |
| 2002 | 2 |
| 2003 | 4 |
| 2005 | 1 |
| 2007 | 2 |
| 2008 | 3 |
| 2010 | 1 |
| 2015 | 1 |
| 2022 | 1 |
| 2024 | 1 |
Which system the reports file it under last ten years
Models most often reporting it last ten years
Models most reported, as a table
| reports | |
|---|---|
| Boeing 737 | 2 |
How it failed the condition found, last ten years
Conditions found, as a table
| reports | |
|---|---|
| cracked | 1 |
| out of limits | 1 |
Engines most often reporting it
Approved replacement parts 4 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a labyrinth seal and sell it as an approved part for the models named. These are the companies holding such approvals for a labyrinth seal:
For these models most: Boeing 767 (1), Airbus A300 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Rexnord Industries, LLC | Labyrinth Seal Assembly 5-1480-700 | 3844065-2 | Airbus A300, Model B4-601, B4-603 | 2014-02-13 | current |
| Qualiseal Technology | Labyrinth Seal Ass'y QT1-300-077 | 1-300-077 | Honeywell T5313B, T5317A, T5317A-1 | 2013-09-05 | current |
| Qualiseal Technology | Labyrinth Seal Assembly QT3059025-01 | Pratt & Whitney 3059025-01 | Pratt & Whitney PT6T-3, PT6T-6, PT6T-9 | 2006-05-02 | current |
| Qualiseal Technology | Labyrinth Seal Assembly QT3017934 | Pratt & Whitney P/N 3017934 | Pratt & Whitney PT6T-3, PT6T-6, PT6T-3B | 2005-11-04 | 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.