Sight Glass
28 failure reports named the sight glass in the last ten years, 52 since 1995, most often on the Boeing 737; the condition most often found was "missing". 5 FAA approvals let 4 companies make a replacement sight glass, Wencor LLC holding the most (2).
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1995 | 1 |
| 1997 | 1 |
| 1998 | 2 |
| 2001 | 1 |
| 2003 | 1 |
| 2004 | 2 |
| 2005 | 2 |
| 2006 | 1 |
| 2007 | 3 |
| 2008 | 2 |
| 2010 | 2 |
| 2011 | 3 |
| 2012 | 2 |
| 2014 | 1 |
| 2016 | 3 |
| 2017 | 4 |
| 2018 | 1 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 4 |
| 2025 | 9 |
Which system the reports file it under last ten years
Reports by system, as a table
| reports | |
|---|---|
| Cabin, seats and restraints | 21 |
| Airframe structure | 4 |
| Instruments and avionics | 1 |
| Electrical power | 1 |
| 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 | |
|---|---|
| missing | 6 |
| detached | 5 |
| cracked | 3 |
| broken | 2 |
| crazed | 2 |
| damaged | 2 |
| leaking | 2 |
| scratched | 2 |
| cloudy | 1 |
| inoperative | 1 |
Approved replacement parts 5 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a sight glass and sell it as an approved part for the models named. These are the companies holding such approvals for a sight glass:
For these models most: Sikorsky S-61 (1), Mcdonnell Douglas MD-10 (1), Mcdonnell Douglas DC-10 (1), Bell 412 (1), Airbus A300 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Rsg Products INC | Sight Glass 04BL224200012-01 | 04BL224200012-01 | Bell 412EP | 2020-10-07 | current |
| Wencor LLC | Sight Glass, Fluid Level 706196WE | 706196 | BOEING MD-10-10F, MD-10-30F | 2015-05-05 | current |
| Wencor LLC | Sight Glass, Fluid Level 706196WE | 706196 | Airbus A300 A300 Model B2-1A, A300 Model... | 2010-02-02 | current |
| Vibro-Meter CORP | Sight Glass VM6041004 | Vickers/Tedeco and Agusta S247-4 and EA6300V526-001 | Agusta EH-101 Series Model Helicopters | 1999-10-03 | current |
| Rotair Industries INC | Sight Glass R6165-62409 | Sikorsky S6165-62409 | Sikorsky S-61N/NM (TC 1H15) | 1993-01-10 | 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.