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The Rolls-Royce Trent 1000 is a British turbofan engine, developed from earlier Trent series engines. The Trent 1000 powered the Boeing 787 Dreamliner on its maiden flight, and on its first commercial flight.

Development
On 6 April 2004 Boeing announced that it had selected two engine partners for its new 787: Rolls-Royce and General Electric (GE). In June 2004, the first public engine selection was made by Air New Zealand who chose the Trent 1000 for its two firm orders. In the largest 787 order, that of Japan's All Nippon Airways, Rolls-Royce was selected as the engine supplier. The deal is valued at $1bn (£560m) and covers 30 787-3s and 20 787-8s.

The first run of the Trent 1000 was on 14 February 2006. First flight on Rolls-Royce's own flying testbed (a modified Boeing 747-200) was successfully performed on 18 June 2007 from TSTC Waco Airport. The engine received joint certification from the FAA and EASA on 7 August 2007 (7-8-7 in Europe).

The Trent 1000 is the launch engine on both initial 787 variants, the -8 with ANA and the -9 with Air New Zealand. On 7 July 2007, Rolls-Royce secured its largest ever order from an aircraft leasing company when International Lease Finance Corporation placed an order worth $1.3 billion at list prices for Trent 1000s to power 40 of the 787s which it has on order ($ m per engine). On 27 September 2007 British Airways announced the selection of the Trent 1000 to power 24 Boeing 787 aircraft.

On 2 August 2010, a Trent 1000 suffered an uncontained engine failure of the intermediate turbine on a test stand. It was reported as being due to a fire in the engine oil system.

Operational history
On 26 October 2011, the 787 flew its first commercial flight from Tokyo Narita Airport to Hong Kong International Airport on All Nippon Airways. It was powered by Trent 1000 engines.

The 787 was introduced in September 2011 with Package A with 1% worse thrust specific fuel consumption (TSFC) than the initial Boeing specification, which was matched by Package B certified in December 2011, then improved by Package C offering 1% better fuel burn than specified and EASA certified in September 2013. From early operations, GE claimed a 2% fuel burn advantage and 1% better performance retention.

In March 2014, of the 787 firm orderbook, Rolls had 321 (31%), GE 564 (55%) and 146 were undecided (14%). The performance improvement packages rectified fuel burn and reliability issues, but problems in the active fleet persist and durability problems with certain components remain for 400 to 500 engines in 2017.

Corrosion-related fatigue cracking of IPT blades was discovered at All Nippon Airways in early 2016. Engines showing excessive corrosion were pulled from service and repaired in a shop visit, more corrosion-resistant blades were developed and rolled-out. HPT blades fatigue was checked and IPC rotor seals inspected but several airlines had to ground 787s. Rolls had to spend $35 million on unexpected “technical provisions” for its in-service Trent 1000 fleet in 2017.

In April 2018, the inspection interval for 380 Package C Trent 1000s was reduced from every 200 flights to every 80 to address durability problems, as the EASA could reduce ETOPS from 330 to 140 minutes and should be followed by the US FAA, impacting trans-Pacific flights. On 19 April, the EASA issued an Airworthiness Directive stating "occurrences were reported on RR Trent 1000 ‘Pack C’ engines, where some IPC Rotor 1 and Rotor 2 blades were found cracked. This condition, if not detected and corrected, could lead to in-flight blade release, possibly resulting in reduced control of the aeroplane." Inspection rates are increased but ETOPS are maintained.

Trent 1000 TEN
Rolls-Royce designed an improved version targeting at least 2% better fuel burn than the current Trent 1000 Package C. Rolls-Royce claims to offer up to 3% lower fuel burn than the competition. The company claims it helps reducing General Electric's dominance of the Boeing 787 engine market, with 42% of newly declared engine orders now going to Rolls-Royce.

It features a scaled version of the Airbus A350's Trent XWB-84 compressor, and Advance3 core technology. Fuel burn is reduced through its improved intermediate pressure compressor where the rear stages spin at higher speeds. Three blisk stages were introduced in the new compressor and 75% of its parts are new or changed from the 1000.

The engine first ran in mid-2014. Rolls-Royce initially hoped to certify the Trent TEN before the end of 2015, and to enter service in late 2016. Revising a weight-saving feature called ‘banded stators’ and other design issues delayed FAA Part 33 engine certification. It was certified by the EASA in July 2016.

It first flew on a Boeing 787 on 7 December 2016. Rolls-Royce will provide the TEN as its engine option for the 787 from 2017. Meeting smoke-emissions limits at landing and takeoff mode points but not at certain thrusts, in August 2017 Rolls-Royce asked the FAA for a temporary exemption through 2019 to develop a modification. European LCC Norwegian Air, Singaporean carrier Scoot and Air New Zealand took delivery of Trent 1000 TEN-powered 787s in November 2017, with the first commercial service on the 23rd.

Design
Initially, Boeing toyed with the idea of sole sourcing the powerplant for the 787, with GE being the most likely candidate. However, potential customers demanded choices and Boeing relented.

For the first time in commercial aviation, both engine types will have a standard interface with the aircraft, allowing any 787 to be fitted with either a GE or Rolls-Royce engine at any time as long as the pylon is also modified. Engine interchangeability makes the 787 a more flexible asset to airlines, allowing them to change from one manufacturer's engine to the other's in light of any future engine developments which conform more closely to their operating profile. The cost of such a change would require a significant operating cost difference between the two engine types to make it economical - a difference that does not exist with the engines today.

As with earlier variants of the Trent family, Rolls partnered with risk and revenue sharing partners on the Trent 1000 program. This time there were six partners: Kawasaki Heavy Industries (intermediate compressor module), Mitsubishi Heavy Industries (combustor and low pressure turbine blades), Industria de Turbo Propulsores (low pressure turbine), Carlton Forge Works (fan case), Hamilton Sundstrand (gearbox) and Goodrich Corporation (engine control system). Altogether, these partners have a 35 percent stake in the program.

The Trent 1000 family makes extensive use of technology derived from the Trent 8104 demonstrator. In order to fulfill Boeing's requirement for a "more-electric" engine, the Trent 1000 is a bleedless design, with power take-off from the intermediate-pressure (IP) spool instead of the high-pressure (HP) spool found in other members of the Trent family. A 2.8 m diameter swept-back fan, with a smaller diameter hub to help maximize airflow, was specified. The bypass ratio has been increased over previous variants by suitable adjustments to the core flow.

A high pressure ratio along with contra-rotating the IP and HP spools improves efficiency. The use of more legacy components reduces the parts count to minimise maintenance costs. A tiled combustor is featured.

Applications

 * Boeing 787 Dreamliner

Variants
Variants were certified by the EASA
 * on 7 August 2007
 * Trent 1000‐A, Trent 1000‐C, Trent 1000‐D, Trent 1000‐E, Trent 1000‐G, Trent 1000‐H


 * on 10 September 2013
 * Trent 1000‐A2, Trent 1000‐C2, Trent 1000‐D2, Trent 1000‐E2, Trent 1000‐G2, Trent 1000‐H2, Trent 1000‐J2, Trent 1000‐K2, Trent 1000‐L2


 * on 6 May 2015
 * Trent 1000‐AE, Trent 1000‐CE, Trent 1000‐AE2, Trent 1000‐CE2


 * on 11 July 2016
 * Trent 1000‐AE3, Trent 1000‐CE3, Trent 1000‐D3, Trent 1000‐G3, Trent 1000‐H3, Trent 1000‐J3, Trent 1000‐K3, Trent 1000‐L3, Trent 1000‐M3, Trent 1000‐N3, Trent 1000‐P3, Trent 1000‐Q3, Trent  1000‐R3