This project aims to develop a framework of requirements which support safe installation and operation of optical devices within an aircraft fuel tank, specifically:
1: To determine optical power and energy limits which ensure safe operation of optical installations within an aircraft fuel tank over aircraft life and under all phases of flight, taking the limits provided in IEC 60079-28:20015 as a starting point.
2: To demonstrate optical and electrical power and energy equivalences, where possible.
3: To determine requirements for optical installations, including bonding and electrostatic discharge for non-conductive components such as optical fibres.
4: To provide guidelines for analysis of the hazards presented by the typical internal components of optical devices, such as failure modes of photo diodes and cells.
Rationale: Optical equipment designed for use in aircraft fuel tanks is becoming more prevalent. A clear set of best practice recommendations and guidelines should be established to guide engineers in optical equipment and system design for safety compliance.