---
title: E10 - Pre-boom mismatch
description: SPACEGUARD - the two angle sensors that monitor the primary (stub) boom angle do not agree Check the angle sensors using the TEST menu to determine where the difference lies, and then inspect the angl
---

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# E10 - Pre-boom mismatch

### Description of error

SPACEGUARD - the two angle sensors that monitor the primary (stub) boom angle do not agree

### Solution

Check the angle sensors using the TEST menu to determine where the difference lies, and then inspect the angle sensors for mechanical damage or misalignment.

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