Certification of Boeing 787-9 Dreamliner by FAA and EASA

The stretched Boeing 787-8 Dreamliner, Boeing 787-9 finally received its certification for commercial service by FAA (United States Federal Aviation Administration) and EASA (European Aviation Safety Agency).

Equipped with Rolls-Royce Trent 1000 engines, Boeing 787-9 will have about 15,400 km (8,300 nm) flight range and 20 feet longer, compare to original Boeing 787-8 series. Currently hundreds of Boeing 787-9 have been ordered and still increasing. Seems the Boeing 787-9 more popular than shorter variant 787-8s.
Boeing 787-9 Dreamliner, Bird Eye View

Boeing 787-9 Dreamliner, Bird Eye View

There are many obstacles during flight testing in order to get certified. Including RAT (ram air turbine) issue, the generator control unit in the RAT failed in recent flight test. RAT allows pilot to keep aircraft trim or stable flight while RAT generating power to avionics and control systems.

The failure pointing Boeing's engineer to generator unit control (GCU), the systems within the RAT. Capacitor and circuit board in GCU degrades following of usage so RAT is not able providing electricity to flight avionics and control systems. In simple words, worn capacitor turns GCU deactivated.

The new design of GCU will ready in February, Boeing will supply to all Boeing 787 series before the date. RAT systems is critical in aircraft, but Boeing states that the risk of failure is extremely improbable. The failure of both engines and APU engine extremely rare equal to one in hundred million and even more rare in RAT failure. Boeing's vice president and chief engineer of Boeing 787 programme, Bob Whittington said that RAT failure at least one in hundred billion.

Boeing will go on production after FAA granted temporary certification for these components which Boeing's non-compliant with regulations. They hope Boeing 787-9 will score good number in sales and become popular aircraft.

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