What it covers
For general reports of the system components and parts which indicate engine temperature with insufficient information to file in a more specific JASC 7700 series code.
Service difficulty reports · 695
Reports filed under 7720, newest first.
| 1995 | 6 |
|---|---|
| 1996 | 15 |
| 1997 | 11 |
| 1998 | 9 |
| 1999 | 19 |
| 2000 | 30 |
| 2001 | 16 |
| 2002 | 26 |
| 2003 | 22 |
| 2004 | 12 |
| 2005 | 10 |
| 2006 | 15 |
| 2007 | 17 |
| 2008 | 10 |
| 2009 | 8 |
| 2010 | 7 |
| 2011 | 8 |
| 2012 | 18 |
| 2013 | 24 |
| 2014 | 35 |
| 2015 | 95 |
| 2016 | 34 |
| 2017 | 47 |
| 2018 | 18 |
| 2019 | 19 |
| 2020 | 6 |
| 2021 | 19 |
| 2022 | 32 |
| 2023 | 61 |
| 2024 | 14 |
| 2025 | 22 |
| 2026 | 10 |
SDR CALA2026070917637Thermocouple · faultedENGINE 1 EGT IN AMBER RANGE DURING CLIMBOUT AT THRUST REDUCTION & ACCELERATION ALTITUDE 1112 FT. DURING TAXI OUT FLUCTUATING ABOUT 20 SPORADICALLY AT LOW POWER SETTINGS. IAW FIM 77-21 TASK 803, BITE TEST FOUND MAINT FAULT 77-20861 FOR BOTTOM LT EGT SIGNAL (T49SDR SWAA2026060808621Sensor · out of rangeMAX T/O THRUST MTJ 97.1 N1 ON CLIMB NR 2 EGT INDICATED 966. REDUCED NR 2 THRUST BELOW REDLINE. INDICATIONS NORMAL AFTER - NO MASTER CAUTION LIGHTS. CW FIM 77-21 TASK 801 FOUND J9 HARNESS AND/OR PROBE OUT OF RANGE. REMOVED AND REPLACED PROBE T49.5 S4 SENSOR SDR ABXA20260525226Thermocouple · defectiveAFTER ENG STARTS AND TAXI OUT, NOTICED LEFT ENGINE EGT INOP. NOTE: EGT LEFT ENGINE 72C RH 369C. CREW RETURNED TO THE GATE (BTB). MTC REMOVED AND REPLACED THERMOCOUPLE JUNCTION BOX IAW 767 300 AMM 77-21-03 UP TO STEP 4 EGT INDICATING SYSTEM OPS TEST AND FOUND P
See all 695 reportsOther codes in chapter 77 · 13
7700Engine Indicating System7710Power Indicating System7711Engine Pressure Ratio (EPR)7712Engine BMEP/Torque Indicating7713Manifold Pressure (MP) Indicating7714Engine RPM Indicating System7721Cylinder Head Temperature (CHT) Indicating System7722Engine EGT/TIT Indicating System7730Engine Ignition Analyzer System7731Engine Ignition Analyzer7732Engine Vibration Analyzer7740Engine Integrated Instrument System7797Engine Indicating System Wiring