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Illustrated technical information covering Vol 2 Over 800 multi-choice systems questions Study notes and technical information Close up photos of internal and external components A compilation of links to major 737 news stories with a downloadable archive Illustrated history and description of all variants of 737 Detailed tech specs of every series of 737 Databases and reports of all the major 737 accidents & incidents General flightdeck views of each generation of 737's Description & news reports of Advanced Blended Winglets Press reports of orders and deliveries Articles from the press and official sources following the troubled history of the rudder PCU Details about 737 production methods A compilation of links to other sites with useful 737 content Get the book of the website A quick concise overview of the pages on this site

The photo below shows feathers still lodged in the booster blades after a 2.5hr flight. Unusually, neither pilot (I was one) saw any birds during the event. There had been no impact sound, smell, vibration or any other abnormal engine indications. In fact we were only alerted by a call from ATC telling us that a seagull had been found on the runway after our departure.

birdstrike

This is the same photo zoomed out and shows how easily it could have been missed on a walkaround, especially if the feathers were near the 12 o'clock position where they would be hidden from view by the fan blades.

Any birdstike into the core, or a birdstrike where not all of the remains of the bird can be found, requires a boroscope inspection within 10 cycles.

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*** Updated 28 Feb 2014 ***

Above & below: Feathers in booster blades from a birdstrike.

The photo below shows a CFM56-3 that took a seagull at 160kts at 200ft after take-off. Again I had no abnormal engine indications but there was a strong smell of cooking bird for several minutes! You can see that blades 5,6 & 7 have all been bent by the impact.

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