Leeham News and Analysis
There's more to real news than a news release.
Leeham News and Analysis
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- Bjorn’s Corner: Air Transport’s route to 2050. Part 18. April 18, 2025
Pontifications: Engine problems are getting worse
By Scott Hamilton
May 14, 2018, © Leeham News: The engine problems are getting worse.
These have moved beyond the technical issues with the Rolls-Royce Trent 1000, GE Aviation GEnx, Pratt & Whitney GTF and CFM56.
The problems are trickling down to the maintenance, repair and overhaul shops.
LNC previously touched on the back-up in MRO shops due to the RR Trent 1000 problems, affecting even Trent 700 (Airbus A330) MRO scheduling. We’ve also reported the knock-on effect of the GTF MRO on other engine shop visits.
The mandated-inspections of CFM56 fan blades in the wake of the Southwest Airlines accident last month inundated MRO shops with unexpected visits.
Now, a European appraisal company forecasts that the “bow wave” of CFM56 shop visits will create a crisis for spare engines and parts.
Demand supports rate 70/mo for A320, 737
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Introduction
May 3, 2018, © Leeham Co.: With the supply chain confirming last Thursday that Airbus and Boeing are exploring single-aisle production rates of 70/mo, Airbus confirmed it was doing so during its Friday earnings call.
Boeing continues to be ambiguous, saying only there is “upward pressure” on its 737 production rates.
The supply chain, notably the engine OEMs, already has heartburn over the current rate of 60/mo and 52/mo for the A320 and 737 families respectively.
Summary
- Engine makers CFM and Pratt & Whitney continue to have technical and production issues.
- Airbus and Boeing each have “gliders,” though Boeing’s is a handful vs the dozens at Airbus.
- CFM’s partner, Safran, cautions against rate 70.
Production rates will be among the topics at the Southeast Aerospace & Defence Conference next month in Mobile (AL). Click here for more information.
Engine deliveries affects Airbus 1Q2018 results
By Bjorn Fehrm
April 27, 2018, ©. Leeham News: Airbus Group presented its 1Q2018 results this morning. It’s heavily influenced by A320neo engine delivery delays.
Only 30 A320neos were delivered during Q1 out of a year total of 400. This has left Airbus with 60 A320neo gliders parked at Toulouse and Hamburg, waiting for engines.
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Engine makers may face stiffer future ETOPS certification requirements
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Introduction
April 23, 2018, © Leeham News: Even before last week’s Southwest Airlines accident raised the focus on aircraft engines, industry officials were becoming worried that problems with engines powering the Boeing 747-8, 787, 737 MAX and Airbus A320neo may lead to stricter certification standards by regulatory authorities.
There is also emerging evidence that the issues with the Rolls-Royce Trent 1000 on the 787s may negatively impact Airbus’ sales efforts with the A350. The A350 is
powered by an entirely different RR engine, the Trent XWB, which by all accounts has had a virtually trouble-free entry into service.
But it’s a Rolls-Royce engine and airlines affected by or watching RR’s response to the Trent 1000 problems are skeptical about the Trent XWB, LNC is told.
Summary
- How long will it take for the FAA and EASE to restore full ETOPS for the 787?
- Concerns emerge that regulators may be more restrictive of ETOPS for new engines powering new planes, with the Boeing 777X next up.
- Impact seen on reception of Rolls-Royce engines on Airbus A330neo and A350.
- What do the engine problems mean for the Boeing NMA?
Narrowbody and Widebody engine developments, Part 2
By Bjorn Fehrm
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Introduction
April 19, 2018, © Leeham News: In an article last week, we discussed the reason the new narrow-body engines are catching up to the fuel consumption of the wide-body engines.
Today we dig a bit deeper into the efficiency changes of the different engines and discuss which parameter changes have caused what changes in engine efficiency.
We will use our engine modeling software GasTurb to analyze what happens in a Turbofan when we change certain parameters.
Summary:
- The engine’s Core or Thermal efficiency changes with Turbine Entry Temperature (TET).
- To fully utilize such an increase in efficiency we need to adapt the overall design of the engine.
Indigo, India’s market-leading airline
By Bjorn Fehrm
April 18, 2018, ©. Leeham News: Indigo started its operation 2006, offering low-cost air travel to the masses in India. The year after, Air India and Indian Airlines, the state-owned flag International and Domestic carrier, merged to form India’s largest airline at the time, Air India.
By the end of 2010, Indigo passed Air India and by 2013 Jet Airways for domestic passenger market share, a position it has kept since.
Déjà vu all over again
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Introduction
April 16, 2018, © Leeham News: There’s high turnover in the executive ranks. Major delivery delays cause disruption and unhappy customers. Airlines are cancelling and switching orders. Product strategy is challenged. Your competitor is taking advantage and making significant inroads.
If this sounds familiar, it is.
It’s déjà vu all over again.
Leveraged Go Air plans major expansion
April 13, 2018, © Leeham News: Go Air of India is the fourth-ranked low-cost carrier by market share, with big ambitions.
The airline had only 32 airplanes at the end of last year but had more than 140 on order as of last month, presaging expansion domestically and internationally.
Image via Google.
This compares with rival Indigo Airlines, the leading LCC, with a current fleet of 153 aircraft and orders for 380; Jet Airways (115 and 75) and SpiceJet (57 and 155). Subsequent to the end of last year, Jet place an order for 75 more 737 MAXes.
Narrowbody and Widebody engine developments
By Bjorn Fehrm
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Introduction
April 12, 2018, © Leeham News: In an article yesterday about Long-Haul LCC costs we observed how the new Narrowbody engines are catching up to the fuel efficiencies of the Widebody engines.
Traditionally the Widebody engines were the efficiency leaders. The Narrowbody companions were designed to be durable rather than efficient.
Figure 1. Cut through of the Narrowbody LEAP engine. Source: CFM
We use the engine modelling software GasTurb to understand why this catching up of the Narrowbody engines has happened.
Summary:
- The new Narrowbody engines for Airbus’ A320 series and Boeing’s 737 MAX are close in specific fuel consumption to the new Widebody engines.
- We use the GasTurb engine modelling software to find the root cause of this change.
Is Long-Haul LCC viable? Part 3
By Bjorn Fehrm
April 11, 2018, © Leeham News: In the second article if Long-Haul LCC is a viable business, we described the cost items which have to be part of a Revenue versus Cost analysis.
In a subsequent article, we used our performance model to develop the typical costs for the aircraft types we study. We now look at these typical costs, discuss their background and relative importance.
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