What it covers
The component and associated parts that cools engine lubricating oil. Includes brackets, outlet doors, scoops, ducts and louvers, but excludes the temperature regulator. Typical parts are cooler, duct, scoop, door, door actuator, etc.
Service difficulty reports · 981
Reports filed under 7921, newest first.
| 1995 | 40 |
|---|---|
| 1996 | 34 |
| 1997 | 63 |
| 1998 | 75 |
| 1999 | 80 |
| 2000 | 34 |
| 2001 | 69 |
| 2002 | 58 |
| 2003 | 63 |
| 2004 | 40 |
| 2005 | 24 |
| 2006 | 29 |
| 2007 | 16 |
| 2008 | 32 |
| 2009 | 21 |
| 2010 | 29 |
| 2011 | 28 |
| 2012 | 67 |
| 2013 | 26 |
| 2014 | 14 |
| 2015 | 25 |
| 2016 | 18 |
| 2017 | 8 |
| 2018 | 20 |
| 2019 | 21 |
| 2020 | 3 |
| 2021 | 9 |
| 2022 | 17 |
| 2023 | 1 |
| 2024 | 5 |
| 2025 | 6 |
| 2026 | 6 |
SDR A6WA202609028910Heat Exchanger · faultedDURING CLIMB NR 2 ENG OIL TEMP REACHED 150'C. C/W QRH -PULLED PWR BACK AND REDUCED PWR. ENG OIL TEMP RETURNED TO NORMAL OPERATING RANGE. NR 2 ENG OIL TEMP CONSTANTLY 20' HOTTER THAN NR 1. MC- ON GRD @ IDLE READS 10-15' HOTTER THAN NR 1. AIRCRAFT REMOVED FROMSDR UIEA2026080700685Heat Exchanger · faultedENG 2 OIL TEMP EICAS MSG. FL 380 MAX OIL TEMP APPROX 194. ENG 2 SHUT DOWN. PERFORMED FIM 79-00, FT FIG 109. R & R FUEL/OIL HEAT EXCHANGER IAW AMM 79-21-01-404-014-J00, OPS CHECK & LEAK CHECKED GOOD. RUN ENG NR 2 AT DIFFERENT POWER SETTINGS AND OIL TEMP NORMASDR CALA2026071617838Transmitter · faultedOIL FILTER BYPASS MESSAGE SHOWS ON ENGINE DISPLAY ENG 1 AFTER STARTUP. MESSAGE DISSAPEARED. MESSAGE REAPPEARED AFTER TAKE OFF. DIVERTED TO CVG. C/W EEC BITE FIM 73-00 TASK 801 & FOUND NO RECENT FAULTS. REMOVED & INSPECTED SCAVENGE FILTER PER MEL 7902A & AM
See all 981 reportsOther codes in chapter 79 · 10
7900Engine Oil System (Airframe Furnished)7910Engine Oil Storage (Airframe Furnished)7920Engine Oil Distribution (Airframe Furnished)7922Engine Oil Temperature Regulator7923Engine Oil Shutoff Valve7930Engine Oil Indicating System7931Engine Oil Pressure7932Engine Oil Quantity7933Engine Oil Temperature7997Engine Oil System Wiring