ANA DH8C near Osaka on Jun 27th 2011, engine shut down in flight
Last Update: February 22, 2013 / 21:06:10 GMT/Zulu time
Incident Facts
Date of incident
Jun 27, 2011
Classification
Incident
Aircraft Type
De Havilland Dash 8 (300)
ICAO Type Designator
DH8C
In this serious incident, during the airplaneÂ’s after-takeoff climb, a section of the cooling ring in the combustion chamber of the engine was fractured due to the progress of fatigue cracks, and the fractured piece went downstream to damage the fast-rotating turbine blades and other parts, resulting in the circumferential turbine blade damage on several downstream turbine stages.
The JTSB reported that the aircraft was climbing through 6700 feet when a loud noise was heard from the left hand engine, the interturbine temperature (ITT) exceeded 950 degrees C and the engine lost power. The engine was shut down and the crew returned to Itami Airport.
A post flight inspection revealed blade damage along various turbine stages. The combustion chamber and high pressure turbine had accumulated 3,415 hours in 4,820 cycles since last overhaul/replacement with new parts. Examination revealed that the fuel nozzles showed no anomaly, the cooling ring attached to the combustion chamber outer line showed fatigue cracks in the circumferential and axial directions at several locations. A section of the ring was missing. All 38 high pressure turbine blades were fractured just above the platform as result of impact damage, all 53 low pressure turbine blades showed damage at the tips as result of impact, the 66 first stage and 71 second stage power turbine blades as well as vanes were fractured. The fractures were confirmed as impact damage, too, some intershaft rubbing was determined.
The JTSB analysed: "As the fracture surface of the bases of the HPT blades indicated the cause of fracture by impact, it is very likely that the missing section of the cooling ring was carried into the HPT area by the combustion gas to strike against the fast-rotating HPT blades or to be caught between the HPT blades and vanes. This generated fractured HPT blades and broken pieces and they further damage the other components leading to the whole circumference. The downstream LPT and PT stages were very likely damaged by broken fragments of the HPT blades and others coming from the upstream."
Incident Facts
Date of incident
Jun 27, 2011
Classification
Incident
Aircraft Type
De Havilland Dash 8 (300)
ICAO Type Designator
DH8C
This article is published under license from Avherald.com. © of text by Avherald.com.
Article source
You can read 2 more free articles without a subscription.
Subscribe now and continue reading without any limits!
Read unlimited articles and receive our daily update briefing. Gain better insights into what is happening in commercial aviation safety.
Send tip
Support AeroInside by sending a small tip amount.
Related articles
3 Tips you Should follow for Long Trips abroad
Are you an avid traveler who likes to spend a majority of your time traveling to different countries and experiencing the local food, places, and…
Tips For Smooth and Penalty-Free Travel in Hungary
Hungary, the heart of Central Europe, beckons travellers with its captivating blend of history, culture, and stunning landscape. From the…
AeroInside Monthly Aviation Safety Review April 2024
April 2024 was a busy month in aviation safety. Please find our summary below.All in all, 90 new articles have been published during last month. 7…
Engineering the future: The intersection of technology and aviation education
Can you imagine a world without technology? What would have started as something that made life easier has grown to become something we can't live…
Behind the Scenes: Insights into Aircraft Ground Support Equipment
Have you ever wondered what happens when you disembark a plane? The roar of jet engines fades, the plane gracefully maneuvers to a stop, and the…
Newest articles
Easyjet A320 at Manchester on May 12th 2024, lightning strike
An Easyjet Airbus A320-200, registration G-EZPD performing flight U2-2179 from Manchester,EN (UK) to Amsterdam (Netherlands), was in the initial…
Canadian North AT72 at Cambridge Bay on Apr 14th 2024, runway excursion on landing
A Canadian North Avions de Transport Regional ATR-72-200, registration C-FRQA performing flight 5T-5858 from Yellowknife,NT to Cambridge Bay,NU…
Subscribe today
Are you researching aviation incidents? Get access to AeroInside Insights, unlimited read access and receive the daily newsletter.
Pick your plan and subscribePartner
A new way to document and demonstrate airworthiness compliance and aircraft value. Find out more.
ELITE Simulation Solutions is a leading global provider of Flight Simulation Training Devices, IFR training software as well as flight controls and related services. Find out more.
Your regulation partner, specialists in aviation safety and compliance; providing training, auditing, and consultancy services. Find out more.
AeroInside Blog
Popular aircraft
Airbus A320Boeing 737-800
Boeing 737-800 MAX
Popular airlines
American AirlinesUnited
Delta
Air Canada
Lufthansa
British Airways