On March 27, during the flight of China Eastern Airlines Shanghai Pudong to London MU551, a female passenger suddenly felt unwell, accompanied by symptoms such as rapid heartbeat, severe asthma, and continuous vomiting. The China Eastern Airlines crew immediately transferred the passenger to the business class to lie flat on their rest, and found two doctors to participate in the treatment through the on-board radio.
At that time, the flight had just passed the border line. Due to the unstable physical condition of the passengers, the crew decided to return to Beijing nearby based on the principle of life first.
Because the passenger plane carrying out this flight carries more oil and is heavier, in order to ensure a safe landing, the crew carried out the oil drainage procedure, air drained 39 tons of oil , and notified Beijing Capital International Airport to prepare for treatment.
The flight landed successfully at the Capital Airport at 17:15 that night. China Eastern Airlines staff immediately accompanied the passengers to the hospital for treatment. Soon, good news came: after being admitted to the hospital, the passengers' condition was relieved and they had turned into danger.
Life is the first
Netizens like China Eastern Airlines
However, many people are also curious: where does the oil put in
go?
Similar events
In fact, in the air in an emergency, it is a routine operation. Previously, there have been many similar oil release and reserved landing incidents in China.
Just over a month ago, on February 27, Sichuan Airlines flight 3U603 was forced to return due to the closed commercial airspace on the originally scheduled route. However, because the plane did not have optional fuel discharge equipment, it had to hover over Chengdu for nearly 6 hours to consume fuel and reduce the weight of the plane.
On March 23, 2018, China Eastern Airlines flight MU587 from Shanghai to New York was urgently prepared to land at the Alaska Anchorage Airport in the United States in order to treat a passenger with a sudden illness. Since the aircraft exceeded its maximum landing weight, in order to safely prepare for landing, the flight released 30 tons of fuel in the air.
Why do you need to put oil on?
An Air China engineer revealed to CD that each model of aircraft has a maximum takeoff weight and a maximum landing weight.
Maximum Take-Off Weighttml21 refers to the maximum weight that an aircraft can take off. Maximum Landing Weighttml21 refers to the maximum aircraft weight determined by structural strength in the landing situation.
For normal flights, from the starting point to the end point, how much fuel is burned is calculated, and when landing, it will be less than the maximum landing weight.
This China Eastern Airlines flight MU551 is an international flight. International flights usually take off with full fuel, which is heavier.
Information provided by China Eastern Airlines shows that the Boeing 777-300ER wide-body passenger aircraft operating this flight had a safety structure weight limit of 251 tons when landing. When taking off from Pudong , it carried more fuel, up to 108 tons, and at the backup rebate point, there were 83 tons of aircraft fuel on board, and the weight of the aircraft was still more than 44 tons compared to the maximum landing weight; in order to ensure a safe landing, the crew carried out the oil drain procedure and released 39 tons of oil in the air, and 5 tons of fuel was consumed during the rebate, which met the safety requirements for landing.
Passenger safety can be guaranteed during the oil throwing process. As long as the pilot can be given enough time to throw oil during an emergency landing.
Once the weight is too high, it will cause heavy landing of the aircraft, which will have a certain impact on safety. Can't you re-land? No, there are exceptions. If the situation is critical, the life of all aircraft can be overweight. This operation is highly destructive and will have an irreversible adverse effect on the aircraft structure.
39 tons of oil will cause environmental pollution?
Air China engineer told China Daily reporters that
As for pollution, this industry generally believes that it will not cause obvious pollution. Because the oil is atomized and decomposed in high altitude. With the development of civil aviation technology, the civil aviation industry and aircraft manufacturers have taken a variety of measures to minimize the negative impact of aircraft oil release in the air. With nature's self-cleaning ability, the pollution caused by this little oil mist is minimal.
China Eastern Airlines also responded to CD Mr. said that similar situations have occurred before.
aircraft can not act casually, but must be carried out according to standard procedures under the command of control. Of course, once air discharge occurs, more convenience and attention will be given to the control and command.
At present, most airports have special oil discharge areas near them. Once a demand for oil discharge occurs, the controller will direct the plane to avoid cities, airports, forests and near-earth low altitudes, and enter a special airport oil discharge area to discharge oil.
For airlines, every air discharge means an increase in costs. In fact, what airlines need to pay is not only fuel costs, but also labor, time and other additional costs. But fuel has a price, life is priceless.
No matter what,
I hope everyone can take the opportunity to be safe,
The following precautions are quickly collected.
Who is not suitable for taking the plane?
Some patients who have not been confirmed in writing by the doctor
Patients of various infectious diseases in the infectious period; patients with aggressive behavior; patients with severe cardiovascular and cerebrovascular diseases; patients with severe respiratory diseases; patients with severe anemia; patients who have undergone any surgery within ten days; and other patients who are medically unsuitable to take the flight.
Certain children
Infants who are less than 14 days old, children with serious diseases, infectious diseases, acute stages of otitis media, children who have had trauma or surgically sutured wounds in the past week, etc.
Certain pregnant women or mothers
The expected delivery date is approaching pregnant women, known to have multiple births or are expected to have complications of delivery, those who are less than 7 days after natural delivery, those who are diagnosed by a doctor with difficulty or premature delivery are not suitable for flights.
Certain elderly people
Elderly people who are over 70 years old and have not provided health certificates or diagnostic certificates.
Precautions for special groups of people taking flight
Elderly passengers
Elderly people over 70 years old must provide health certificates or diagnostic certificates from second-level A or third-level A hospitals in advance.
If you experience dizziness, physical weakness, numbness, nausea and other discomfort before boarding, it is recommended to give up on boarding the plane and do not take it as a matter of safety.
Pregnant women
Pregnant women who are less than 32 weeks pregnant take the plane, except for the doctor who diagnoses the person who is not suitable for the plane, fill out the "Application Form for the plane" when submitting the application for the plane. Healthy pregnant women who are pregnant for more than 32 weeks but less than 36 weeks will provide a "diagnostic certificate" with complete procedures.
Baby and children
Do not let the child sleep during takeoff and landing. Babies do not need to stop crying. You can give the child appropriate amount of water and food, and swallow to reduce the air pressure to change the damage to the eardrum, but the amount of food should not be too large.
Family members need to inform the children in advance of possible physical discomfort during the flight, especially ear discomfort during take-off and landing, to reduce the child's fear. For possible airflow bumps, fasten your child with a seat belt and avoid eating during the bumps.
After surgery, patients
, it is recommended to consult the attending doctor for professional advice before boarding the plane. If you go to the hospital for a routine examination before each trip, it will be safer.
Editor: Wang Yu, Fu Huimin
Partial content reference: MU Dongdongkong
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