What it covers
The system that senses and measures brake mean effective pressure (BMEP) or engine torque in turbo-prop and piston engines. Does not include internal parts which are type certificated with the engine. Typical parts are indicator, line, sensor, transmitter, pressure switch, etc.
Service difficulty reports · 1,239
Reports filed under 7712, newest first.
| 1995 | 157 |
|---|---|
| 1996 | 150 |
| 1997 | 163 |
| 1998 | 127 |
| 1999 | 119 |
| 2000 | 57 |
| 2001 | 61 |
| 2002 | 67 |
| 2003 | 60 |
| 2004 | 40 |
| 2005 | 33 |
| 2006 | 31 |
| 2007 | 14 |
| 2008 | 12 |
| 2009 | 21 |
| 2010 | 17 |
| 2011 | 14 |
| 2012 | 26 |
| 2013 | 13 |
| 2014 | 12 |
| 2015 | 10 |
| 2016 | 10 |
| 2017 | 4 |
| 2018 | 3 |
| 2019 | 8 |
| 2020 | 2 |
| 2021 | 3 |
| 2023 | 3 |
| 2025 | 1 |
| 2026 | 1 |
SDR QR9R2026031300001Torque Box · malfunctionedENGINE PARAMETER MALFUNCTION DURING START RUN-UP. REMOVED AND REPLACED TORQUE ADJUSTMENT BOX IAW AMM 77-12-00, 4-2. T/F MOC COMPLETED; CHECKS GOOD.SDR COEA2025072404711Gauge · erraticFLT 8735, ENROUTE ANC-ENA AIR TURNBACK. DURING CLIMB OUT, THE PILOT NOTICED ERRATIC FLUCTUATIONS OF THE TORQUE GAUGE. RETURNED TO ANC. NO EMERGENCY WAS DECLARED. LANDED WITHOUT FURTHER INCIDENT. REPLACED THE TORQUE GAUGE. OPS CHECK GOOD.SDR ABXA2023050882Tach Generator · intermittentN1'S FLUCTUATING AT IDLE BOTH ENGINES 23.3-26.5 ACCOMPANIED BY INTERMITTENT VIBRATION IN COCKPIT THAT DOES NOT APPEAR ON VIBRATION GAUGES. ALL OTHER EICAS GAUGES WITHIN LIMITS. AIRCRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANCE REMOVED AND REPLACE
See all 1,239 reportsOther codes in chapter 77 · 13
7700Engine Indicating System7710Power Indicating System7711Engine Pressure Ratio (EPR)7713Manifold Pressure (MP) Indicating7714Engine RPM Indicating System7720Engine Temperature Indicating System7721Cylinder Head Temperature (CHT) Indicating System7722Engine EGT/TIT Indicating System7730Engine Ignition Analyzer System7731Engine Ignition Analyzer7732Engine Vibration Analyzer7740Engine Integrated Instrument System7797Engine Indicating System Wiring