Overheat / Fire Protection Panel
FAULT Light

Illuminated –

With the overheat detector switch (OVHT DET) in NORMAL  
indicates that both detector loops for an engine have failed.

Illuminated –

With the overheat detector switch in A or B – indicates the
selected loop for an engine has failed.
Note: The MASTER CAUTION and OVHT/DET system
annunciator lights do not illuminate.