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Incorrect fitting? Not wear

d In pairs, describe the problems in Exercise 6c using the following phrases.
a faulty part; a sudden problem; a systematic problem; an installation problem;
an intermittent problem; caused by wear and tear; It's / It was ... ;
It's / It was probably ...; Perhaps it's / it was ... ; This is / was a ...;

e Complete the following table using the phrases in the box from the conversation.
I doubt it's; it can't be; it could be; it might be; it must be; it sounds like it's;

1 It's certainly / it must be
2 It's probably /
3 It's possibly / / a problem with ...
4 It's probably not /
5 It's certainly not /

f ► 5.3 Complete the following extracts from the conversation using phrases in Exercise 2e.
Listen again and check your answers.

1 Obviously, it must be be some sort of defect in the fuel injection system.
2 So a software problem.
3 ... maybe a defective sensor.
4 Presumably, anything too serious.
5 water, then, if the fuel went in directly from a delivery.
6 a faulty fuel pre-heater.

7a In pairs, analyse the problem described below. Underline the words in the box that
describe it.
major; minor; sudden; systematic; intermittent;
The problem
The driver of a dump truck, which operates in a quarry, has noticed that the truck’s diesel engine
is slightly down on power. The problem has become progressively worse over several weeks.
Apart from the power loss, the engine is performing consistently, with no misfiring and no
overheating. The degree of power loss remains constant throughout a given period of use, from
starting the engine to turning it off. No increase in fuel consumption has been noted.

b Read the notes and assess the possible causes of the problem in Exercise 7a using the
words in Exercises 6d and 6e.
Possible causes of the engine problem
• water in the fuel supply
• a lubrication problem
• a clogged fuel filter
• a blockage in the exhaust system
• a compression leak from the piston cylinders
III Describing the causes of faults
8 Look at the following strategies for preventing and dealing with technical problems in
aviation. In pairs, discuss what is meant by the following terms and how they are used by
engineers and pilots.
1 checklists 3 back-up installations

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