Pilot: "Shanghai Tower, CES 567, radio check on 123.45." Controller: "CES 567, Shanghai Tower, read you 3, your signal is weak. Check your transmitter." Question: What is the controller's response to the pilot's radio check?

Pilot: "Beijing Ground, Delta 234, radio check on 118.1." Controller: "Delta 234, Beijing Ground, read you 5. You are loud and clear." Question: How does the controller describe the pilot's signal?

Controller: "Guangzhou Tower, Eastern 890, radio check please." Pilot: "Guangzhou Tower, Eastern 890, radio check on 119.7. How do you read me now?" Controller: "Eastern 890, I read you 4, your signal is jammed." Question: What is the issue with the pilot's signal according to the controller?

Pilot: "Kunming Ground, United 789, radio check on 120.3." Controller: "United 789, Kunming Ground, read you 2. You are cut in and out. Please repeat your message." Question: How does the controller advise the pilot to proceed?

Controller: "Southern 456, Shenzhen Tower, radio check on 121.5." Pilot: "Shenzhen Tower, Southern 456, radio check on 121.5. How do you read?" Controller: "Southern 456, I read you 5." Question: What is the pilot's signal quality according to the controller?

P: CCA 750, we have a pressurization problem, we need to descend to 5100m immediately. C:CCA 750, unable to descend due to high terrain (ground). for descent, turn right, 060 degrees, expect descent clearance in 10 km. Question: Why are they unable to descend immediately?

P: Wuhan Control, CSN 345. C: CSN345, go ahead. P: There seems to be a bush fire just to the right of our position about 40 miles. C: Can you give us the exact position please? P: stand by, we are 25 miles of LKO VOR on the 15o radial C: position copied, thank you, CSN345. Question: Why did Wuhan control want China Southern 345's exact position?

P: MAYDAY, MAYDAY, MAYDAY, BAW141, B747, we have total electrical failure, request emergency landing, currently 10 km west of Taiyuam, passing 7800m,heading 120. Question: What problem does BAW141 have?

P: BAW725, we are returning for landing, we seem to have nose wheel well fire, request priority landing and emergency services. C: BAW725, call you back. C: BAW725, you are No. 1 to land, emergency services will be ready upon landing. Question: What’s the problem with the aircraft?

P: Chengdu Control, CSN4971, we are unable to control the pressurization, cabin altitude is rising fast, request immediate descent to 3000m. C: CSN4971, descend to 3000m, report reaching. P: descending 3000m, report reaching, CSN4971. Question: What was the crew's initial maneuver?

P: Wuhan Ground, Singapore 521, request taxi. C: Singapore 521, taxi to holding point runway 36 via taxiway Zulu 4, Alpha 3 and Alpha. P: taxi to holding point runway 36 via taxiway Zulu 4, Alpha 3 and Alpha, Singapore 521. P: Wuhan Ground, Singapore 521, the tailwind exceeds our takeoff limit, request change to runway 18. Question 4: Why did Singapore 521 ask for runway change for departure?

C: China Southern 3286, surface wind 040 degrees, 4 meters per second, runway 36L, cleared for takeoff. P: Runway 36L, cleared for takeoff, China Southern 3286. P: Tower, China Southern 3286, takeoff aborted. C: China Southern 3286, roger. confirm the reasons for aborted takeoff. P: we have takeoff configuration warning in the cockpit, China Southern 3286. Question: What did China Southern 3286 reject takeoff?

P: PANPAN, PANPAN, PANPAN, Departure, American 2562, we need to return to Phoenix, we have low oil quantity in one of our engines. C: American 2562, roger PANPAN, you are cleared to the Sky Harbor Airport via radar vector, maintain 10000. P: maintain 10000, American 2562. Question: What happened to American 2562?

C: Air Canada 1199, Tower, wind 200 at 10 gusting 17 knots, caution wake turbulence, following Boeing 787, cleared to land runway 24L. P: cleared to land runway 24L, Air Canada 1199. P: we are going around, Air Canada 1199. C: Air Canada 1199, runway heading, maintain 3000, do you need any assistance? P: Negative, we had a passenger that ran into the toilet on final, so we can’t land, Air Canada 1199. Question: What was the reason for Air Canada 1199 going around?

P: PANPAN, PANPAN, PANPAN, Tokyo Departure, Asiana 105, flight control problem, request holding waypoint. C: Asiana 105, confirm you request holding. P: roger, we have hydraulic problem, Asiana 105. C: Asiana 105, roger, request your intention. P: request stop climb at 10000 and we need holding point, Asiana 105. Question: Why did Asiana 105 make a PANPAN call?

P: Wuhan approach, Dragon Air 306, we just found that some medical supplies are leaking from the cargo compartment. We are coming back and request landing at Wuhan. C: Dragon Air 306, roger, turn left heading 060, descend and maintain 1500 meters on QNH 1011. C: Dragon Air 306, what is the type of the medical supply in the aircraft? P: It is alcohol, Dragon Air 306. (53 words) Question: What happened to Dragon Air 306?

P: Wuhan approach, Air China 4307, 4000m descending to 2700m. We have seen a big white balloon ahead of us 30km from left to right. C: Air China 4307, roger. Radar not contact with the balloon, what's your intention? P: Roger, we need to turn left to avoid the balloon, Air China 4307. C: Air China 4307, roger, cleared to turn left to avoid the balloon, report clear of the balloon. (59 words) Question: What can we learn from the exchange?

P: Wuhan Control, this is Japan air 783, 9200m maintaining. Just now we have a male passenger attempted to enter the cockpit. C: Japan air 783, Wuhan Control, roger, report the situation. P: The first officer has been sent out to check it out, I'll keep you informed, Japan air 783. P: The first officer just came back and he said that the passenger is very aggressive, it seems that he has taken some drugs. While being escorted back to his seat, the passenger attacked other passengers. (76 words) Question: What happened to Japan Air 783?

P: Wuhan approach, Air Canada 503, we lost the ILS signals, and we are going around, 300 meters climbing now, turning to DA. C: Air Canada 503, Wuhan approach, roger, climb and maintain 900 meters, report your intention. P: Roger, climb to 900 meters on QNH, we request to make another approach, Air Canada 503. (54 words) Question: Why did Air Canada 503 make a missed approach?

P: Wuhan Control, Air China 4106, we have just encountered the severe turbulence, 2 passengers were severely injured, and 1 passenger with heart attack. C: Air China 4106, confirm you declare PANPAN, report your intention. P: Yeah, we want to declare a PANPAN, and request priority landing at Wuhan airport. C: Air China 4106, you are number 1, radar vector, turn left heading 150, expedite descend and maintain 4200m. (65 words) Question: Which of the following is not true according to the exchange?