Boeing 747 and 767 have the same explosion flaw as the 727 tank

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The US Federal Civil Aviation Agency (FAA) has issued new airworthiness guidelines warning airlines of the need to repair a Boeing 747 and 767 if it has an explosion risk problem similar to that already identified with the Model 727.

According to the authorities, the sensors of the fuel gauges have to be modified in order to avoid a spark and possible ignition in the tank, which contains very volatile gases in addition to the fuel itself.

Under Directives 2020-18-02 (for 747) and 2020-18-16 (for 767), U.S. jet operators have 72 months from November 10th to make the change in accordance with the procedures approved under applicable regulation . Compliance is also required in other countries that have US regulations such as: B. in Brazil.

The problem is very similar to one that Boeing did not want to fix in the 727. In the case of the classic Trijato, the problem also lies with the fuel sensor, which can cause ignition and possible explosion, leading to a catastrophic accident.

Another argument with the FAA

Boeing 727

As we show here, Boeing stated at this point that the power outage in this meter is extremely small and has limited vulnerability. Another point raised by Boeing is that of the 272 jets built, only six had the auxiliary tank with the above-mentioned fuel gauge installed.

Now Boeing is again contesting the FAA guideline accompanied by cargo airlines such as FedEx, KLM Cargo and UPS Airlines.

The imposition affects the 747-400, -400F, 767-200 / ER / ERF, 767-300 / ER / ERF / F and 767-400ER jets. This list includes 71 jumbos and 261,767 aircraft, only those registered in the United States.

The justification is basically the same as for the 727: the likelihood of this happening would be very small. Boeing even said it was investigating other changes. In turn, the FAA said there were “anomalies found in the review of the aircraft fuel system”.

Finally, Boeing said the modification started in February on 767 of some affected airlines and that the new jets are already leaving the plant with that modification. The 747-8F version, which may have various systems that are not affected by the problem, does not mention the status of the jumbo that is still in production.

With information from the FAA

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