ELPAC Test Practice: Listening and Oral Interaction

The pilot cannot descend because there is a vibration, a vibration in the aircraft. The aircraft is at flight level one zero zero, and the crew wants to stay there while they check. I would acknowledge the message and ask the pilot if they need any assistance. I would check the traffic situation before offering an option. I would not assume the crew can descend now.

The pilot has said they are unable to descend because of vibration and are maintaining their present level while they investigate. I would acknowledge the report, confirm that I understood their request and ask whether they need assistance or have any further limitations. At the same time I would assess the traffic situation and coordinate an appropriate option. I would communicate any instruction clearly and listen to the readback.

The routine descent has become an investigation at the aircraft’s present level, so I would first acknowledge both the inability to descend and the crew’s stated intention to remain there. I would ask what assistance or manoeuvring restrictions they anticipate, without pressing them for a diagnosis they may not yet have. Meanwhile, I would assess the traffic picture and coordinate before offering an option. Any subsequent instruction needs a clear readback and a check that it remains workable for the crew.

I can see an aircraft engine with a cover open. An engineer is looking at the engine from a platform. The aircraft is parked inside a hangar. Maybe the engineer is checking a problem, a problem with the engine, but I cannot tell from the picture. The work may take some time. The crew will need information before they can plan the next flight.

The aircraft is parked in a hangar, and an engineer is inspecting an engine with the cowling raised. We cannot tell whether this is a scheduled inspection or a response to a fault. In either case, the maintenance team would need to communicate its findings to the crew. If further work is required, that could affect the departure plan, so the crew would need an update before making decisions.

The raised cowling draws attention to an engine inspection in progress, though the photograph gives us no reason to decide whether it is routine or fault-related. The useful next step would be a clear handover between maintenance and the flight crew: what was observed, what remains to be checked and whether the aircraft is available for the planned flight. Until that information is confirmed, any estimate of a delay would be speculation rather than evidence.

A readback helps the controller hear what the pilot understood. If a message changes, the pilot can repeat the new instruction. Sometimes one part is not clear, not clear to the pilot, so the pilot can ask a question. For example, I might ask the controller to repeat a heading. Then I can say the heading back and check that it is correct.

A readback gives the controller an opportunity to hear whether the pilot understood the instruction, while a follow-up question can resolve the part that remains uncertain. For example, after a changed heading, a pilot who heard only part of the number should request it again rather than fill in the gap. The subsequent readback lets both parties check that they are working with the same instruction.

The two serve different but complementary purposes. A readback exposes the listener’s understanding to the person who issued the instruction; a focused question prevents an unresolved gap from being disguised by a confident response. If a revised heading is partly blocked, I would identify the missing element, ask for it again and then read back the complete instruction. The exchange only works if the controller also listens for a mismatch and corrects it.