ATA 72 GE90

Question 1

What is the Boeing Equivalent Thrust (BET) for GE90 engine? (A, B1, B2)
a. 90600 lb
b. 80000 lb
c. 110000 lb

Answer 1

A

Question 2

The GE90 engine’s bypass ratio is (A, B1, B2)
a. 8.4:1
b. 7.5:1
c. 9.6:1

Answer 2

A

Question 3

The GE90 engine has these gearboxes (A, B1, B2)
a. Inlet, transfer, accessory
b. Internal, angle, main
c. Inlet, angle, main

Answer 3

A

Question 4

The GE90 engine’s Fan rotor spinner has (A, B1, B2)
a. Three pieces
b. Two pieces
c. One piece

Answer 4

C

Question 5

The GE90 engine’s 22 wide-chord fan blades are made of (A, B1, B2)

a. Titanium

b. Carbon fiber and resin with titanium leading and trailing edges

c. Steel

Answer 5

B

Question 6

The GE90 engine’s Fan blades are prevented from axial movement by (A, B1, B2)
a. Platforms
b. Retaining ring
c. Retainers

Answer 6

B*

Question 7

Dove tail slots are marked (numbers are on fan disk) for ( B1)
a. Blades 1 and 5
b. Blades 1 and 3
c. Blades 1 and 4

Answer 7

A

Question 8

The GE90 engine’s Fan balance weighs are ( B1)

a. Attached to fan disk

b. Balance screws attached to the spinner

c. Attached to fan blades

Answer 8

B

Question 9

The GE90 engine’s Low pressure turbine is balanced by ( B1)

a. Sheet metal clip-on weighs for stage 6 blades

b. Sheet metal clip-on weighs for first stage blades

c. Sheet metal clip-on weighs for stator vane blades

Answer 9

A

Question 10

GE90 engine’s borescope plugs are (B1)

a. Self-locking and do not use seals

b. Not self-locking

c. All different

Answer 10

A