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Illustrated technical information covering Vol 2 Over 800 multi-choice systems questions Close up photos of internal and external components Illustrated history and description of all variants of 737 Databases and reports of all the major 737 accidents & incidents History and Development of the Boeing 737 - MAX General flightdeck views of each generation of 737's Technical presentations of 737 systems by Chris Brady Detailed tech specs of every series of 737 A collection of my favourite photographs that I have taken of or from the 737 Press reports of orders and deliveries Details about 737 production methods A compilation of links to other sites with useful 737 content Study notes and technical information A compilation of links to major 737 news stories with a downloadable archive A quick concise overview of the pages on this site

The photo below shows the importance of ensuring that all filler caps and hatches are correctly closed before flight. The hatches are painted dayglo orange on the inside to make them easier to detect and are designed so that they are difficult to close with the cap not properly in place.

In this case water had seeped through an incorrectly fitted cap and froze behind the panel forcing it open. 15 minutes into the flight the cabin crew reported that they had no water available in the rear galley even though the quantity indicator was showing half full. Shortly later the forward galley also dried up.

After landing a 3ft icicle was observed from this hatch but it broke off before I could photograph it. During the 1hr flight, the water had frozen back up the line and into the tank. The aircraft was grounded for several hours while it was allowed to thaw out.

If this had been the toilet servicing panel, it would have formed the famous "Blue Ice", so called because of the chemicals used in the flushing agent.

Notice how the drain mast from the sinks is heated (the HOT decal) to allow water to flow out without icing problems.

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*** Updated 23 Nov 2020 ***

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Ice formed from an incorrectly closed water servicing panel.

Ice formed from an incorrectly closed water servicing panel.


The various servicing panels on a 737

The various servicing panels on a 737.

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