Boeing company showed the newest progress that 737 MAX obtains evidence and resumes operation now, say to already completed the development that 737 MAX software upgrades, and relevant imitate machine checks and work by the project trial flight that the company begins.
Boeing expresses, the 737MAX of software of the MCAS after upgrading with installation completed 207 sortie, flight test of more than 360 hours. The company is in should management board of confederative aviation of FAA(United States) the requirement provides more information, include air man how to fall to control system and the detail that indication system has interacting with the plane in different flight scene. Once ask to satisfy, boeing general and FAA obtain evidence certainly jointly test-fly program is referred obtain evidence finally file.
In addition, boeing said to had developed those who improve to groom with education material, mixing with administration of aviation of FAA, whole world airline client undertakes evaluating to them jointly, with supporting return operation is mixed more long-term move, this includes a series of area client meetings that holding in world each district.
This week of Er of Wei of · dust Er also shows Daniel of director of representative of bureau of American confederative aviation, predicting Boeing will be in " control next week " the software that refers pair of 737MAX upgrades and groom plan offers examine and verify.
Although Boeing has not give out,737MAX type restores the time of operation, but be based on above information, the outside guesses FAA hopeful this year summer vacation time approves this type to resume operation, and aviation administration still meets each country make according to the comfortable boat of FAA, to whether approving 737MAX answer fly to be evaluated further.
Answer hearing of flying examine and verify
Be in nevertheless this vital link, the FAA that is in charge of superintending and the NTSB that responsible accident investigates (American country carries safe committee) had stick to one's position however.
On May 15, be subordinate to belongs to American Boule carry and infrastructure committee holds concerned Boeing 737MAX the hearing of process of type answer flying examine and verify, and with respect to 737 MAX the error that comfortable boat may exist federally in authorized process had inquiry to FAA and NTSB.
To getting media oppugns " in aircraft comfortable ship in authorized process, boeing since athlete is ref " problem, er of Wei of · dust Er weighs Daniel of FAA representative director, FAA is examining this one existence afresh tens of year system of orgnaization commission authorization, but he expresses, itself of commission authorization system is the system of an effective, this one system allows the FAA attestation employee of 79 aircrafts manufacturer to assist attestation of the plane that finish.
And the Gan Daqing of undersecretary of American Department of Transportation that attending 2019 China civil aviaton to develop forum also is mentioned, "ODA (orgnaization commission authorization) to us, not be to want to let a thing undertake getting simpler, quicker way, the cost of ODA itself is not low, authorized flow is unhappy also at the same time. ODA is not a very new idea, going up early actually century 20 time were operated with respect to what already a few is similar to ODA, at the same time our Moses also knows the value of ODA. At the same time our Moses also knows the value of ODA..
Besides the response the outside is oppugned, aierweier is on the hearing, 13 lunar hind exceed in 737MAX operation to Boeing, just inform the indicator that receive part to already matched instead choosing to deserve to express dissatisfaction by mark to the outside. But he also points out, should not label the project that does not attribute crucial and safe factor the crucial question that affects safety, its more is be used by maintenance technician the breakdown cause that identifies a plane to go up.
Boeing says before this, in greeting horny indicator to be not comfortable boat code must function, but can upgrade in software the lieutenant general greets horny indicator to restore to match a function to provide all users for mark.
Aierweier still admits, MCAS attributes the crucial factor that flight safety affects on 737 MAX really, should be emphasized to allude in flight manual and pilot training. But he points out at the same time, in lion boat JT610 and ET302 of boat of dust a place of strategic importance in two accidents, aircrew asks without rigorous executive training in already some lash-up programs. The air man of ET302 put through afresh the level is stable the face is dynamoelectric deserve to make the same score, and did not press the airspeed that manual asks to keep proper, it is aircrew fails to pass a hand successfully to move deserve to make the same score restore main to plane pilot reason.
To this, chairman NTSB Robert Samuwote expresses, if manufacturer plans to sell this plane on global market, so must the air man that can assure all world regions knows how safe drive this plane.
"Kind of sound thinks the training level of American air man is very high, because this encounters sudden state to be able to be handled correctly; And a few otherer pilot training level of the country is different, serious problem may appear below sudden circumstance, I think this ought not to be (cause 737MAX two cases of the accident) explanation " , samuwote refuted Aierweier's view, "The dependability of the plane ought to be achieved, after air man accepts what contented lowest asks to groom can the level of safe flight " .
Although be in charge of the NTSB that traffic accident investigates doing not have grounding of aircraft of 737MAX of immediate in that way like FAA decision or the right that resume operation, FAA is affirmatory also be in only " the ability below the circumstance of absolute safety can allow 737MAX to resume operation " , but the difference of NTSB and FAA may accentuate the public is right latter distrust.
Like Larsen of chairman of Boule aviation subcommittee is on the hearing speak bluntly " problem of credit of existence of bureau of American confederative aviation " . Boule is carried and Peter Defaqiao of infrastructure committee chairman points out, the lack in manual is right to the introduction of MCAS, system the unreasonable dependence of individual sensor data, doubt that caused the outside to reach its attestation process to FAA with etc problem, we must get to the bottom of this.
"To 737Max, we have the group with authorized technology of authorities of a combination, this group already held first time meeting, at present this group has come from the whole world 9 aviation authorities, include expert of relevant technology safety, the leader of the group comes from carry safe committee at American country, "Gan Daqing of undersecretary of American Department of Transportation expresses on forum of development of 2019 China civil aviaton, this group is met the design with respect to aerostat, authorized, code, add up to compasses sex, groom, and relevant ODA flow undertakes assessment, in a few months of future, FAA is automatic to aerostat the authorized flow of flight control system, undertake very comprehensive authorized and evaluate.
According to the plan, FAA still will organize the global aviation about 737MAX to superintend orgnaization conference on May 23, the FAA on the conference and Boeing are met labor reason and solution.
When to resume operation
The intermediary outside having before this guesses, if during new without discovery issue, at the same time each country civil aviaton superintends an orgnaization to approbate, so the ban that predicting FAA may be by May or pair of 737MAX remove at the beginning of June. And boat department needs to spend time to to stopping the 737MAX of field solution is sealed and undertake software upgrades, still need the complement of didymous air man to groom, predict to be in the most quickly around 737MAX will resume commercial operation in August.
Look at present nevertheless, although FAA removed the ban to 737MAX, each country still can combine oneself to judge a decision to whether resume 737MAX operation.
China shares grounding of aircraft of 96 737MAX airlines at present, its China boat 15, east Shanghai Airline 14, na Hang 24, hai Hang 11, Xiamen Airline 10, deep boat 5, Shan Hang 7, auspicious roc aviation 3, Ao Kai aviation 2, Fuzhou aviation 2, Kunming aviation 2, 9 yuan of aviation 1.
To restoring the time that run, chinese civil aviation bureau states precondition is to need to hold 3 principles at least before this:
It is the comfortable boat accordance that should find out a plane to design. According to comfortable boat standard, the respect such as principle of the design concept of relative to the plane interconnected system, job, compose definition and security analysis undertakes be assessmented adequately, ensure aircraft design accords with comfortable boat to ask.
2 it is to should ensure concerned safety precaution gets carrying out fulfilling. To what must carry out the design is changed and aircrew trains, want a plane ground of a plane is stared at, an aircrew ground pays an unit, ensure every wear a plane to finish add accordingly change one's costume or dress, every driver finishs the training of the requirement.
3 it is to want as close as accident investigation conclusion correlation. Want to investigate official conclusion to be a basis with the accident, evaluate a plane adequately to concern design and improve, and corresponding training requirement, affirmatory to solving an accident to investigate place problem has specific aim and validity.
Of the negotiable securities that start line of business grind the newspaper points out, because be in a tradition at present off-season, 737MAX grounding of aircraft is not quite apparent still to the influence of boat look forward to and market, but the transport power proportion that 737MAX type holds future two years is larger, if arrive,the problem before the following in June busy season comes still did not get settlement, so transport power increment can be restricted apparently.
