Safety Notice: Fischer Connector Best Practices

Safety Notice: Fischer Connector Best Practices

As part of our continued monitoring and investigation into the root causes of aircraft incidents and near misses, we have identified connector-related conditions that can contribute to in-flight power or communication loss.

All Hovermap operators, particularly those conducting underground drone operations, are reminded to include Fischer connector inspection, correct handling, and proper insertion checks as part of routine pre-flight procedures to help reduce these risks.

Fischer connector collar wear and chipping

Damage to the rim of the inner connector collar can occur if the connector is inserted at an angle or subjected to sideways pressure, particularly in restricted spaces. Fragments from the damaged collar may enter the connector interface and interfere with cable operation, resulting in intermittent or complete power or communication loss. This is more likely to occur in volatile or visibility-limited environments where debris can accelerate wear and conditions make it challenging to properly assess the cable.

Key points

• Cause: Angled insertion or sideways pressure during connection

• Impact: Fragments from the damaged collar can enter the connector interface and interfere with operation, causing power or communication loss

• Risk factors: Volatile environments where debris accelerates wear and conditions make inspection difficult

• Inspection tip: Look for chips or cracks along the rim of the inner connector collar

❌ Not Serviceable Damage to inner connector collar Dust or debris present inside connector Wear affecting serviceability Dirty connector surfaces Pins damaged (not visible in image above)

✅ Serviceable Intact inner connector collar Clean inside connector Light wear but still fully serviceable Clean connector surfaces All pins intact and undamaged (not visible in image above)

 

Improper Fischer connector insertion

This occurs when the connector makes electrical contact but the push-pull latch has not fully engaged. Without the latch seated, the connector may disconnect under vibration or cable movement, resulting in intermittent or total loss of connection. This can happen if latch engagement is not verified after insertion or if debris prevents the latch from locking fully.

Key points

• Cause: Connector not fully latched during insertion

• Impact: Disconnection during flight, causing loss of power or communication

• Risk factors: Debris in latch area, restricted access to connector, no post-insertion check

• Inspection tip: After connecting, push until the latch clicks and gently pull to confirm it is locked

Immediate operator actions

• Inspect all existing Fischer connectors before each flight for collar wear, chipping, or debris.

• Check the Fischer connector on the Hovermap for wear or debris.

• Fit the rubber cap when the connector is not in use to protect it from dust and debris.

• Continue monitoring connector condition as part of regular maintenance.

• Clean connectors to remove dust and debris at least every two weeks, or more frequently in dusty environments.

• Ensure connectors are fully aligned and inserted until they click, then gently pull to confirm they are locked.

• Upgrade to the latest version of Cortex and keep systems updated as new versions are released, including the upcoming release in the coming weeks, to maintain optimal operational reliability.

• Replace connectors if wear or damage is identified, as damage can occur at any point in the service life through handling or debris ingress.

These checks should form part of every pre-flight routine to support safe and reliable operation. If you find damage to your current cable, please contact Emesent Client Support. with images of the cable connector end and the cable type. This may include Fischer-to-Fischer cables, fixed connection fitting kits for supported drones, and similar assemblies.

Our next steps

• We’ll work with you to ensure you have operational cables through our replacement program, prioritising mining and underground operations.

• We’re exploring ways to further enhance connector design for long-term reliability.

• We’ll continue refining our inspection processes and testing standards so you can operate with confidence.

Your safety and operational reliability are our top priorities. If you have any concerns about your Fischer connector or require a replacement, please contact Emesent Client Support.