(a) Values of some main engine exhaust temperatures displayed in the engine control room console differ from those displayed locally on the engine for the same cylinders. (9)

(i) Explain how it may be determined which readings are inaccurate.

(ii) State possible reasons for these inaccurate readings.

(iii) Explain how the location of the faults may be detected.

(b) State the periodic checks, which should be undertaken to ensure that remote engine instrumentation is working accurately. (7)