A system configured to monitor temperature in a plurality of zones of an aircraft , the system comprising: first and second connectors in optical communication; an optical fiber extending between the first and second connectors, the optical fiber with first and second ends, wherein the first end of the optical fiber is connected to the first connector , wherein the optical fiber comprises: a first timing fiber Bragg grating disposed in the optical fiber at a reference location of the optical fiber; a first interrogator connected to the first end of the optical fiber , wherein the first interrogator is configured to provide a first optical signal to the optical fiber and to receive a first timing signal from the optical fiber , wherein the first timing fiber Bragg grating is configured to provide the first timing signal with information related to the first timing fiber Bragg grating ; a controller operatively connected to the first interrogator and configured to determine the reference location of the optical fiber based on the first timing signal received by the first interrogator ; a plurality of temperature fiber Bragg gratings disposed in the optical fiber ; and a second timing fiber Bragg grating disposed in the optical fiber , wherein the second timing fiber Bragg grating is configured to indicate a second reference location of the optical fiber ; wherein the optical fiber , the first connector , and the second connector make up a line replaceable unit , wherein the system comprises a plurality of line replaceable units disposed throughout the plurality of zones of the aircraft ; wherein the first timing fiber Bragg grating is configured to indicate a start point of a line replaceable unit , and wherein the second timing fiber Bragg grating is configured to indicate a finish point of the line replaceable unit ; and wherein the first timing fiber Bragg grating is disposed between the plurality of temperature fiber Bragg gratings and the first end. first and second connectors in optical communication; an optical fiber extending between the first and second connectors, the optical fiber with first and second ends, wherein the first end of the optical fiber is connected to the first connector , wherein the optical fiber comprises: a first timing fiber Bragg grating disposed in the optical fiber at a reference location of the optical fiber; a first interrogator connected to the first end of the optical fiber , wherein the first interrogator is configured to provide a first optical signal to the optical fiber and to receive a first timing signal from the optical fiber , wherein the first timing fiber Bragg grating is configured to provide the first timing signal with information related to the first timing fiber Bragg grating ; a controller operatively connected to the first interrogator and configured to determine the reference location of the optical fiber based on the first timing signal received by the first interrogator ; a plurality of temperature fiber Bragg gratings disposed in the optical fiber ; and a second timing fiber Bragg grating disposed in the optical fiber , wherein the second timing fiber Bragg grating is configured to indicate a second reference location of the optical fiber ; wherein the optical fiber , the first connector , and the second connector make up a line replaceable unit , wherein the system comprises a plurality of line replaceable units disposed throughout the plurality of zones of the aircraft ; wherein the first timing fiber Bragg grating is configured to indicate a start point of a line replaceable unit , and wherein the second timing fiber Bragg grating is configured to indicate a finish point of the line replaceable unit ; and wherein the first timing fiber Bragg grating is disposed between the plurality of temperature fiber Bragg gratings and the first end. <EOS>