Levent From France, joined Sep 2004, 1718 posts, RR: 5 Posted (9 years 12 months ago) and read 4014 times:
Yesterday 27 October a Japan Airlines Boeing 777 returned to Tokyo Narita after cracks appeared in one of the cockpit windows Flight 723 had 197 passengers on board and was flying to Kuala Lumpur. The cracks appeared during cruise at an altitude of 11 km in a window on the captain´s side and measured 40 to 50 cms. The plane landed safely in Tokyo and the pax were taken to Kuala Lumpur with another plane.
Levent From France, joined Sep 2004, 1718 posts, RR: 5
Reply 2, posted (9 years 12 months ago) and read 3975 times:
What´s wrong with that? The plane was crusing at an altitude of 11 km (about 36,000 feet) and the cracks appeared in a window on the captain´s side. Sorry if the words aren´t in the correct order, but English is not my native language...
KDTWFlyer From United States of America, joined Jun 2004, 830 posts, RR: 1
Reply 5, posted (9 years 11 months 4 weeks 1 day 11 hours ago) and read 3525 times:
Lyzzard that is an amazing picture! I read in my Concorde Story book that in August, 1994, three outter window panes of the Concorde cracked at Mach 2 and 57,000ft. with no loss of pressurisation and the inner ply was taking it all! Must have been quite a sight initially to see the windows start to crack over 10 miles up.
AndersNilsson From Sweden, joined May 2004, 417 posts, RR: 16
Reply 13, posted (9 years 11 months 2 weeks 6 days 10 hours ago) and read 2610 times:
What is a MEL?
A Minimum Equipment List (MEL) is a list of items that may be unserviceable on a type of aircraft under certain stated conditions such as when other identified components are operating normally and weather conditions permit. It is developed from a Master Minimum Equipment List (MMEL) which is published by a regulatory authority in consultation with the aircraft manufacturer and industry.
The MEL improves aircraft utilization without compromising safe operations and thereby provides a more convenient and economic air transportation system for the public. The MMEL includes those items of equipment related to airworthiness and operating regulations and other items of equipment that the authority finds may be inoperative and yet maintain the required level of safety by appropriate conditions and limitations. A predetermination is established, at the time the MMEL is produced, of the level of safety existing with each item unserviceable based on redundancy and probability of failure.
Cpt Underpants From Canada, joined May 2001, 166 posts, RR: 0
Reply 14, posted (9 years 11 months 2 weeks 6 days 9 hours ago) and read 2538 times:
That's an excellent description of the MEL, maybe the best I've ever seen. I have to wonder if it is from the preamble in your company's document?? In any case, I hope you don't mind if I use it! I'm building a training program and I need a nice description.
A cracked, shattered or delaminated cockpit window is a pretty regular ocurrence, but there are many causes, which can include a failure in the anti-icing grid, a crack in a pane, a bird strike, or a delamination caused by a separation of the window layers.
I once heard that the windshield on the B757 is the toughest ever made, because when it was tested, the testers fired frozen turkeys at it, and had to beef it up some more to pass. In reality, the frozen part was unnecessary, as it's rare to run into a frozen bird at 15,000 ft! I don't know if this is true, but it makes a good story!