What it covers
The portion of the system which is an integrated concept that receives engine operating parameters and transmits them to a central processor for cockpit presentation. Typical parts are the display units, transmitters, receivers, computers, etc.
Service difficulty reports · 53
Reports filed under 7740, newest first.
| 1996 | 1 |
|---|---|
| 1997 | 1 |
| 1999 | 1 |
| 2000 | 1 |
| 2001 | 4 |
| 2002 | 7 |
| 2003 | 9 |
| 2005 | 1 |
| 2007 | 3 |
| 2008 | 2 |
| 2012 | 2 |
| 2013 | 1 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 4 |
| 2020 | 6 |
| 2021 | 1 |
| 2022 | 2 |
| 2025 | 2 |
SDR ABXA20251106289Sensor · defectiveDURING TAXI, RIGHT ENGINE N1 STARTED ON 2 STARTS AND NO N1 INDICATION ON SEI SHOWS 0. AIRCRAFT RETURNED TO BLOCKS (BTB). REMOVED AND REPLACED N1 SPEED SENSOR IAW B767 AMM 77-12-01. OPS CHECK GOOD. A/C REMAINS ETOPS 180. STANDBY INDICATOR REINSTALLED IAW BSDR G1IA202503064087Display · frozenEIS GAUGES: TRQ, ITT, NG, FUEL QTY AND FL/H USED ALL FROZE. THIS PROBLEM WAS INTERMITTENT AT FIRST, THEN THE LAST 15 MINUTES, THE GAUGES FROZE.SDR SIMA20220727001Engine Vane Cont · vibrationENGINE 2 HIGH LP VIB CLIMBING THROUGH 11,OOO; HIGH VIBRATIONS DID NOT GO AWAY CLIMBING THROUGH FL; 200. QRH PROCEDURE ACOMPLISHED/EMERGENCY DECLARED/ OVERWEIGHT LANDING. -C/A-A FULL WORKSCOPE WAS PERFORMED TO TROUBLESHOOT VIBRATIONS ON RH ENGINE 902446, FAN BL
See all 53 reportsOther codes in chapter 77 · 13
7700Engine Indicating System7710Power Indicating System7711Engine Pressure Ratio (EPR)7712Engine BMEP/Torque Indicating7713Manifold Pressure (MP) Indicating7714Engine RPM Indicating System7720Engine Temperature Indicating System7721Cylinder Head Temperature (CHT) Indicating System7722Engine EGT/TIT Indicating System7730Engine Ignition Analyzer System7731Engine Ignition Analyzer7732Engine Vibration Analyzer7797Engine Indicating System Wiring