Den nedladdningsbara omfattande PDF-filen (icao.int) har en lista för 747-8.
Jämförtmedwebbplatsenssökfunktion:
Minspekulationärattwebbsökningenrymmernågonsomsöker"BBJ" på olika sätt (varför jag inte vet), eller databasen behöver städa upp. Som du kan se är två av de tre desamma. Och dömande av den faktiska designatorn är de alla samma.
När det gäller reglerna:
De finns i ICAO DOC 8643, Aircraft Type Designators; eller FAA JO 7360.1B - Luftfartygsdesigners. FAA-arbetsordningen är 2 månader gammal och innehåller också den fullständiga listan.
Den relevanta delen till den här frågan:
A different designator for an alternate or subtype version of the aircraft will only be allocated when there is a significant difference in performance for ATS or no shared designator can be assigned.
(Betona min.)
Det betyder att A320neo har betydande prestandaförändring (A20N vs A320). Ett plan som Boeing 777-200 med tre motoralternativ behöver inte olika designatorer. A330neo är ännu inte att flyga, men A339 kommer upp på webbplatsens sökning. Inget kom upp för A330-800neo.
Relaterat: Vad kommer 737 MAX 7, 8 och 9 ICAO ID-er att vara
De fullständiga reglerna:
2-2. How Designators are Formulated. The International Civil Aviation Organization (ICAO) has the role of creating standard aircraft type designators for aircraft that commonly request air traffic service. ICAO assigns an aircraft type designator using the following principles:
a. Only one designator will be assigned per aircraft type.
b. A designator will be derived from the manufacturer’s model number or name, or from a common military type.
c. The designator will not be longer than four characters and will generally begin with a letter.
d. An assigned designator will not be changed for license-built aircraft, when an aircraft model is sold to or manufactured by another company, when the manufacturer’s name changes, or when the aircraft type is derived or converted from another type.
e. A different designator for an alternate or subtype version of the aircraft will only be allocated when there is a significant difference in performance for ATS or no shared designator can be assigned.
f. “Homebuilt,” “amateur-built,” or “kit plane” aircraft that exist in operationally significant numbers will be assigned a designator; however, these aircraft will only be listed under the original designer or under the manufacturer that produces or produced the aircraft type in series.
g. In general, an aircraft type designator will be assigned to all aircraft heavier than micro-/ultra-light. For the purpose of ICAO Document 8643:
Micro-/ultra-light are those aircraft types with a maximum certified take-off weight of 1,000 pounds or less and a stall speed not greater than 35 knots.
Micro-/ultra-light helicopters and gyrocopters are those helicopters or gyrocopters with a maximum certified take-off weight of 1,000 pounds.
Micro-/ultra-light autonomous, optionally piloted, and remotely piloted aircraft are defined as having a maximum certified take-off weight of 330 pounds or less and a stall speed not greater than 35 knots.
Micro-/ultra-light autonomous, optionally piloted, and remotely piloted helicopters are defined as having a maximum certified take-off weight of 330 pounds or less.
h. Romerska siffror som används som del av flygplansmodellnamn eller -nummer kommer att ersättas med arabiska nummer.