737-800 Weather Radar System Troubleshooting Guide

ben8532 · 发表于 2015-3-21 04:19:00

738 weather radar 故排簡述
738 Weather Radar System Troubleshooting Guide
Background :
One 738 aircraft experienced the weather radar and predictivewindshear fail. Finally, the system was back to normal afterreplacing the weather radar R/T and cooling fan.
MAINTENANCE ADVICE
1. The WXR R/T do not use the equipment cooling air forcooling from A/C. It’s cooling by the cooling fan itself.
2. If cooling fan is inoperative, it will cause R/T overheat andfail.
3. When doing WXR troubleshooting, it is recommended that goto forward E/E COMP to do the self-test from WXR R/T frontpanel and check the cooling fan is working normally. Correctthe fault following fault dada.