What are pedestrians doing walking through the prop arc anyway????.

Very few people are trained about the dangers of props today.

Having pulled a few props through over the years having checked the mags are off and throttle closed i have always been aware that the engine could catch anyway! NEVER walk within striking distance of the prop walk round it by a good margin..

Amen to that! The rare times I deal with turbo props I give them a wide berth too, old habits thankfully die hard.
Keep safe

Rgds Cking

Yes, that’s the reason. Any piston engine with inverted cylinders (Radials, inverted in line and inverted V’s) needs to be turned over one full crankshaft rotation in the direction of running to clear any oil that may have leaked past the piston rings and collected in the cylinder head. It has to be in the direction, as you want to push any oil into the exhaust.
As Bazza333 says if you don’t do it and you have a cylinder full of oil, when that piston starts its compression stroke the oil won’t compress and you will break something.
Hand pulling the prop is normally only done on the first flight of the day.
It is not recommended to spin the prop by the starter as, when you are doing it by had you should feel the hydraulic lock form and it will stop you but it wouldn’t stop a starter.

Rgds Cking

If the turn round was 75 minutes I very much doubt that any engine related components were changed. (Ten minutes to open and correctly close the cowlings, Half an hour for the red hot engine to cool enough to work on it, fifteen minutes to do the paperwork Ten minutes to drink tea etc, etc)
Also doing an engine run to leak check or validate a component with passengers on is a no-no.
I suspect the reason you were treated to the high power run was that it would have been full of fuel, passengers and luggage full of straw donkeys. I don’t know about the runway length at Cancun but it would have been hot so the aircraft would have been heavy and Biggles would have wanted to know that he could get full power before he let his brakes off.
As for de icing the engine I have never heard of that procedure myself so I can’t coment.
At full power a 767 will jump about a bit, GREAT WASN’T IT!!!!
Rgds Cking

To become a flight engineer will require a minor miracle as there are so few aircraft around that require them. I think that the writer of this artical had not reserched that part of his artical that well! How much does he think navigators and radio operators get?

Rgds Cking

I would have thought they’d scrap it…after ferrying it to a suitable place.

Naa. A big scab patch will cover that. They might replace the skins eventualy.

Rgds Cking

“But a spokeswoman dismissed fears of a forward undercarriage malfunction by saying it would have been deliberately deployed to increase drag while the aircraft used up fuel before it landed in London”

Later another spokesman said that the previous spokeswoman was talking B******s as you cannot deploy the gear in parts, it’s either all up or all down!

Rgds Cking

I think trying to explain eddy current testing to a journalist in a meeting like that would be difficult. The last thing this incident would need would be the NTSB guy to appear to not know what he was talking about.

Rgds Cking

Seems like they have found a few more aircraft with defects in that area

http://www.bbc.co.uk/news/world-us-canada-12954335

This bit was interesting:

“What we saw with Flight 812 was a new and unknown issue,” said Mike Van de Ven, Southwest’s executive vice-president and chief operating officer.

“Prior to the event regarding Flight 812, we were in compliance with the FAA-mandated and Boeing-recommended structural inspection requirements for that aircraft,”

Rgds Cking