It has 4 Krueger flaps (2 on each wing) and 8 slats (4 on each wing):
LE devices consist of four flaps and eight slats: two flaps inboard and four slats
outboard of each engine.
(Boeing 737 NG FCOMv2 9.20.20 - Flight Controls - System Description - Flaps and Slats)
You can see the Krueger flaps in the following image (thanks to ymb1 for the link):
Absolute ceiling is not a fixed number and may change from flight to flight, and even within the same flight. It depends on conditions at altitude, loading of the aircraft, etc. A lightly loaded aircraft may be able to push the envelope higher than one that is heavily loaded. That is why the number that is published is the service ceiling, which is ...
From prof. Wittenberg's half-a-century-old lecture book, paper copy only, translation and interpretation fully on my account. Way before any A320 family aeroplane...
The pic is relevant for propeller aeroplanes, and indicates a theoretical ceiling (max climb speed = 0) that is about 5% higher than the service ceiling (max climb speed = 100 ft/min). The ...
Generally, without knowing the details of this accident, dual engine failures are typically caused by one of the following:
starvation (e.g. due to iced fuel filters)
water, lots of it.
operating the aircraft outside the flight envelope
In general there's a few reasons for a multiple engine failure:
Running out of fuel: This has happened more than once when the wrong fuel load was put on the airplane, see the Gimli Glider and the Azores Glider, there's also a case where hijackers forced an airplane to run out of fuel and ditch because they wanted to flee to Australia
Fuel Contamination: ...
I will not speculate as to the cause of the mishap to which you are referring (Transair 810), however, I believe I can provide some clarity regarding the route over water. The Honolulu airport is located relatively close to Waikiki, a neighborhood with a lot of hotels and apartments. Many airports have noise abatement procedures in place to minimize the ...
The oil systems on the two engines are separate, for the obvious reason. If there is (uncontaminated) fuel in the tanks, pilots can't starve the engines without deliberately closing the engine start lever (i.e. shutting the motor down themselves) or getting into unusually nose-high attitudes. The latter don't matter when boost pumps are operating- which is ...