Das sind die "Block Numbers" -
Kurze Erklärung via Google
ZitatWB051, United's first 777-200ER.
W: The first letter indicates the aircraft by model. W is for the 777, V is the 767, R is the 747. Unfortunately, I don't know the single-aisle designations. Okay, that was pretty easy.
B: Now it gets a bit trickier. For the most part, the second letter indicates the aircraft by version. Here, the 'B' indicates it is a -200ER. An 'A' would indicate a standard -200. But if you were thinking a 'C' would be the -300, stop. It doesn't. For some reason, Boeing decided to divide the 'B's in half. The first half (WB001-WB499) are -200ERs, while the second half (WB501-WB999) are where you find the -300 series. Okay, this will now tie into:
051: To finish, each customer is given a block of aircraft, indicated by the 3 numbers. These blocks can be large or small, depending on how many aircraft the particular customer has on order/option. For instance, British Airways, with 5 -200s on order, has a small block of 'A' aircraft (WA076-WA085) but, with 40 -200ERs on order, a much larger block of 'B's (WB001-WB050). As you can imagine, United has large blocks of both series (WA002-WA075, WA261-WA270, WB051-WB100). As you hopefully noticed, UA actually has been assigned 2 different blocks of -200 aircraft. This leads to the last point; the series of numbers are assigned in the sequence of assembly, not order. However, they are also broken up if a customer orders different configurations for the same aircraft. For example, ANA has both a 2-class 'Domestic' 777-200 and a 3-class 'International' configuration. These are seperated into 2 different blocks. The United seperation comes from another reason, as well. The aircraft from the second block come from a follow-on order (not conversion of options) placed years after the first. This results in a different series of numbers.
Hallo,
viele Airlines haben die Numbers mit auf die Nameplate im Cockpit gedruckt
Siehe : http://www.jetphotos.net/viewphoto.php?id=7439894
Oder man hat selber etwas "gebastelt"
z.B. http://www.airliners.net/photo/Jet-Airways/Boeing-737-85R/2035665/
Bei uns ist die Block Number vorne auf der Deckseite des QRH zu finden.
