Page 25 - World Airnews Magazine January 2020 Edition

ENGINES BUSINESS JETS

GE AVIATION URGES GE90 400TH AIRCRAFT FROM

STATOR SWAPS G650 FAMILY

GE’s Ted Ingling helped develop the GE90-115B, the
world’s largest and most powerful jet engine in
service. Boeing uses the engine to power its 777 jets
ulfstream Aerospace
Grecently delivered the

400th aircraft from the ultra
long-range Gulfstream G650
family to a customer and the
aircraft will be based in the US.

“Business jet travellers the
world over have long rec-
ognised the G650ER as the lead-
ing combination of speed and

range in the business aviation

sector,” said Mark Burns, presi- recognition for its ability to connect far-flung cities at the fastest
dent, Gulfstream. speeds.

“Its achievements and accolades have mounted since its The G650 can fly up to 7,000 nautical miles/12,964 kilometres

introduction, including an incredible 100-plus city-pair speed at Mach 0.85 and 6,000 nm/11,112 km when flying faster at a

records, the prestigious Robert J. Collier trophy and the title for high-speed cruise of Mach 0.90. The G650ER can fly up to 7,500
the farthest, fastest business jet flight in history. We could not nm/13,890 km at the same long-range cruise speed and 6,400

be more pleased to deliver the 400th aircraft in the G650 and nm/11,853 km at Mach 0.90. Both aircraft are capable of a near-su-

G650ER fleet.” personic maximum operating speed of Mach 0.925 and have a

The G650ER, entering service just five years ago, quickly gained maximum cruise altitude of 51,000 feet/15,545 metres. Q

300ER experienced No. 1 engine failure on “It is highly probable that damage to

takeoff from Tokyo International Airport multiple stages of stator vanes and turbine

E has recommended operators of en route to New York’s John F. Kennedy blades of low-pressure turbine was con-
GGE90-115B engines install re-de- Airport. The crew shut the engine down tributed by the fracture of one of LPT fifth COMPLETE PILOT TRAINING MATERIAL

signed stator vane segments to prevent and returned to Tokyo safely. stage stator vanes.” AVAILABLE ON DESKTOP OR MOBILE, ONLINE AND OFFLINE
wear and potential cracking that inves- Investigators found one of the engine’s GE issued an SB in July 2018 recom-

tigators determined was behind a 2017 LPT fifth-stage stator vanes fractured, mending borescope inspections for the Examination Preparation: Our high quality databases of training questions for

Japan Airlines (JAL) engine failure, a Japan causing downstream damage including affected area. PPL, IR, CPL, and ATPL are tailored to the needs of cadet pilots which aid them with
Transport Safety Board (JTSB) report on the damaged turbine blades and a 6 cm by 1 By April 2019, GE reported cracks and their preparation for internal tests and final theoretical examinations. Our questions
incident revealed. cm (2.4 in. by 0.4 in.) hole in the turbine wear in 18 stator segments from 14 en- databases are available in conjunction with our online exam trainer.
The issue is linked to spacing between rear frame. The missing vane fragments gines, including two operated by JAL. One Flight Schools: We provide a range of services for flight schools, training provid-

low-pressure turbine (LPT) fifth-stage were not recovered, but investigators of the JAL engines had an LPT fifth-stage ers and ground instructors. Our e-books, including complete sets of PPL, CPL & IR

stator segments. Tests conducted by GE in linked the damage to the previously stator with 25 original-spec segments guides are available to flight schools at negotiated discounted rates.

2013 predicted that binding could cause known wear condition, or “arch-binding,” and one new-spec segment. Signs of arch

adjacent segments in the 26-segment fifth- JTSB said. binding were found on all 25 of the origi- Aviation Authorities: Aviation authorities can take advantage of our EASA and
stage stator to wear, causing stress and “Wearing caused by rubbing of adjacent nal-spec segments, JTSB said. ICAO compliant, didactical, professionally reviewed, instructional databases of
potentially cracks in vanes. segments was confirmed on ... multi- GE in August last year issued an SB that examination questions for FCL and AMEL. Together with one of the world’s most

Even though the issue had never been ple segments of LPT fifth-stage stator recommended operators upgrade all orig- advanced examination systems, we provide aviation authorities with the most
linked to an in-service incident, GE vanes,” JTSB said, adding that “repetitive inal-spec stator segments when the LPT is professional way to conduct examinations.
re-designed the segment to provide more stress associated with engine operation” disassembled, even if the segments do not
clearance. GE introduced the change on the likely caused the crack on the failed vane need to be replaced. The JTSB report said
production line and made the new segment to expand. it is “probable” that the change will reduce DISCOUNTS AVAILABLE FOR

- which can be mixed with the original “It is highly probable that the serious in- the likelihood of arch-binding. FLIGHT SCHOOLS & RESELLERS
design - available for retrofit. cident was caused by collisions of some of The agency also urged GE to analyse

However, a service bulletin detailing the fragments with the turbine rear frame, its data and determine an “appropriate

the change “did not describe that the which led to generating the hole due to interval” for conducting inspections to Email ctl@aircademy.co.za for full product catalogue or more info

part was design changed as a counter- damage to multiple stages of stator vanes monitor old-spec stator segments and
measure for the in-house test,” JTSB and turbine blades of low-pressure turbine advise operators. www.aircademy.co.za

explained in its report. (LPT) of No. 1 (left side) engine immediately JAL is inspecting its engines every 250

On September 5, 2017, a JAL Boeing 777- after take-off,” JTSB said. cycles, JTSB said. Q
World Airnews | January 2020 World Airnews | January 2020
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