About this document
APU GCU Fail Troubleshooting Guide by Edgar Hidalgo is a document available to read on EtoBox.
This document provides instructions for troubleshooting a fault code indicating an APU generator control unit (GCU) failure as displayed on the central maintenance computer (CMC). It describes that a failed APU GCU will cause the APU GEN OFF BUS message to also display. Troubleshooting steps include using GSE 499 software to verify if the GCU is truly faulty, checking relevant circuit breakers, and isolating faults in related systems like the generator if their failure messages also appear.
- Author
- Edgar Hidalgo
- Language
- EN