What it covers
The system including the indicator and sensor which indicates engine speed in revolutions per minute (RPM). Typical parts are, cable, connector, tachometer, tachometer generator, N1 indicator.
Service difficulty reports · 1,357
Reports filed under 7714, newest first.
| 1995 | 88 |
|---|---|
| 1996 | 99 |
| 1997 | 171 |
| 1998 | 215 |
| 1999 | 126 |
| 2000 | 70 |
| 2001 | 95 |
| 2002 | 84 |
| 2003 | 55 |
| 2004 | 38 |
| 2005 | 28 |
| 2006 | 23 |
| 2007 | 11 |
| 2008 | 9 |
| 2009 | 11 |
| 2010 | 8 |
| 2011 | 18 |
| 2012 | 15 |
| 2013 | 14 |
| 2014 | 13 |
| 2015 | 9 |
| 2016 | 8 |
| 2017 | 6 |
| 2018 | 6 |
| 2019 | 28 |
| 2020 | 17 |
| 2021 | 31 |
| 2022 | 17 |
| 2023 | 5 |
| 2024 | 14 |
| 2025 | 12 |
| 2026 | 13 |
SDR QR9R2026082100001Sensor · failedIN FLIGHT NR NEEDLE ON TRIPLE TAC FAILED. IN FLIGHT NR FLUCTUATED CONTINUOUSLY BETWEEN NORMAL RANGE AND 0 WITH ASSOCIATED LIGHT AND WARNING TONES. REMOVED AND REPLACED SPEED PICK-UP SENSOR IAW AMM 62-41-00, 4-1. MOC SUCCESSFULLY COMPLETED.SDR QR9R2026081100001Sensor · failedOVSP SYSTEM 1 FAILED DURING START RUN-UP. MAINTENANCE ARRIVED AND PULLED CB AND CAUTION LIGHT WAS STILL ILLUMINATED AFTER RESETTING CB. DURING TROUBLESHOOTING, FOUND #1 ENGINE OVERSPEED SENSOR BAD. PINS 1-2 OP AND PINS 4-5 HIGH RESISTANCE. REMOVED AND REPLACEDSDR DALA2026080704581Pressure Sensor · faultedDIVERTED TO DTW DUE TO RIGHT ENGINE FAULT WITH ASSOCIATED N1 ERRATIC AND N1 DROP. REPLACED BURNER PRESSURE SENSOR PER A220 AMP 73-21-23. REPLACED HARNESS W04 PER A220 AMP 73-21-64. REPLACED EEC PER A220 AMP 73-21-01. (LP 8423746 - AIRCRAFT WAS GROUNDED)
See all 1,357 reportsOther codes in chapter 77 · 13
7700Engine Indicating System7710Power Indicating System7711Engine Pressure Ratio (EPR)7712Engine BMEP/Torque Indicating7713Manifold Pressure (MP) Indicating7720Engine 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