11.3 Flashcards

airframe structures aeroplanes

1
Q

what component reduces length of stringers

A

frames

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2
Q

what spacing is generally used between frames

A

20’’

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3
Q

how can stringers be connected at production breaks

A

stringer splices

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4
Q

what shape clip used to attach stringers to frames

A

angled or T clips

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5
Q

what prevents pressurised areas from air leaks

A

faying surface

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6
Q

what does a keel beam do

A

support wheel well area and wing loads

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7
Q

what seal is used on main entry details

A

flap type mechanical seals

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8
Q

what are passenger seats attached too

A

standard seat rails

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9
Q

4 door categories

A

main entry, service, cockpit, cargo & emergency

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10
Q

equipment in lower lining on main entry door

A

escape slide/ survival kit

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11
Q

functions of door seals

A

pressure and weather seals

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12
Q

function of overhead hatch or sliding widow in cockpit

A

emergency exit for flight crew

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13
Q

how do power assist systems operate on passenger doors

A

in emergencies

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14
Q

position of mode selector with engaged girt bar

A

armed , auto and flight

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15
Q

how does emergency door slide connect to cabin floor

A

girt and girt bar

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16
Q

what door is an over-wing emergency hatch

A

plug doors , hatches have no hinges

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17
Q

regulation on weight & seating capacity with cockpit door locked

A

Annex 6

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18
Q

what is annex 6

A

45500kg or passengers more then 60 , equipped with lockable & fire resistant door.

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19
Q

what’s fitted at lower part of flight deck door

A

decompression & evacuation flap

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20
Q

what is decompression flap & evacuation flap used for

A

rapid pressure release in cockpit

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21
Q

what makes bulk cargo doors different

A

opens inward

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22
Q

how do fwd, aft, side doors open

A

hyd powered and outward

23
Q

what direction do floor beams lay

A

along fuselage length

24
Q

what happens to horizontal stabiliser if cog moves forward

A

leading edge stab moves down

25
Q

how can you reduce wave drag

A

area rule

26
Q

what structure has multiple attachment points to share the load instead of one attachment point

A

Fatigue sharing

27
Q

what zones does rear pressure bulkhead separate

A

200-300

28
Q

what load is carried by longerons

A

primary bending loads

29
Q

3 main areas of wing structure

A

centre, left and right wing boxes

30
Q

what creates smooth seal between fin and fuselage

A

dorsal fin

31
Q

what is the rudder attached to

A

rear of vertical fin

32
Q

where should the moveable stabiliser be before measuring deflection angle

A

must be in zero position

33
Q

after a repair to flight control surface why are adjustments made

A

for static balancing

34
Q

what’s the purpose of a pylon

A

attach engine to airframe / wing

35
Q

how many attachment points does the pylon have to the wing

A

3

36
Q

how many booster pumps required per engine

A

2

37
Q

size of lighting hole

A

1/4 inch

38
Q

distance between frames

A

20”

39
Q

purpose of stringers

A

carry stresses induced by fuselage

40
Q

sweep angle of modern jets

A

30 degrees

41
Q

plain flap lift increase

A

55%

42
Q

slat lift increase

A

35%

43
Q

split edge lift flap increase

A

65%

44
Q

slotted flap lift increase

A

70%

45
Q

what are rudder pedals used for

A

rudder , brakes and nose gear steering

46
Q

where is nacelle intake drain located

A

lower wing section

47
Q

How many windows on most aircraft

A

6

48
Q

Where is pylon located

A

Under each wing

49
Q

Zone for nacelle

A

400

50
Q

What construction does the skin cabin pressure to keep the fuselage rigid

A

Monocoque

51
Q

What fore and soft structural member is used to maintain contour

A

Rib

52
Q

The door selector arms the emergency mechanism lever in what mode

A

Flight mode

53
Q

False spar loads

A

Landing gear attachment