What it covers
For general reports of system units external to the engine which store and deliver engine lubricating oil to and from both turbine and reciprocating engines with insufficient information to file in a more specific JASC 7900 series code.
Service difficulty reports · 260
Reports filed under 7900, newest first.
| 1995 | 5 |
|---|---|
| 1996 | 1 |
| 1997 | 4 |
| 1998 | 1 |
| 1999 | 2 |
| 2000 | 7 |
| 2001 | 9 |
| 2002 | 10 |
| 2003 | 6 |
| 2004 | 2 |
| 2005 | 9 |
| 2006 | 4 |
| 2007 | 3 |
| 2008 | 1 |
| 2009 | 3 |
| 2010 | 2 |
| 2011 | 1 |
| 2012 | 4 |
| 2013 | 4 |
| 2014 | 4 |
| 2015 | 3 |
| 2017 | 2 |
| 2018 | 4 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 13 |
| 2022 | 32 |
| 2023 | 88 |
| 2024 | 11 |
| 2025 | 14 |
| 2026 | 9 |
SDR 2NSA100326727029Bypass Valve · failedPILOT EXPERIENCED RISE IN ENGINE OIL TEMPERATURE DURING STRAIGHT AND LEVEL FLIGHT. PILOT COULD NOT RECTIFY THROUGH INITIAL EMERGENCY PROCEDURES AND INITIATED A LAND AS SOON AS POSSIBLE AND CONDUCTED PEL. OIL TEMP REACHED 116 DEG, FAULT TROUBLESHOT IAW PWC PT6BSDR QMLA2026090820063Sensor · faultedENG OIL TEMP AT MAXIMUM OPERATING RANGES IN FLIGHT, REPLACED ENGINE TEMP SENSOR AND BYPASS VALVESDR ASAA2026070865689Safety Wire · brokenATB : ENG 2 LOW OIL QTY AT FL 320. GROUNDED - YES. FOUND LOOSE CONNECTION AND BROKEN SAFETY WIRE ON THE SCAVENGE PUMP LINE FROM THE HP/IP BEARING SUMP. OIL LEAK SOURCE IDENTIFIED AT THIS CONNECTION.RE-TORQUED THE CONNECTION AND INSTALLED NEW SAFETY WIRE. CHECK
See all 260 reportsAirworthiness concern sheets · 1
Other codes in chapter 79 · 10
7910Engine Oil Storage (Airframe Furnished)7920Engine Oil Distribution (Airframe Furnished)7921Engine Oil Cooler7922Engine Oil Temperature Regulator7923Engine Oil Shutoff Valve7930Engine Oil Indicating System7931Engine Oil Pressure7932Engine Oil Quantity7933Engine Oil Temperature7997Engine Oil System Wiring