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12.1 AEROPLANE GENERAL
12.1.1 Introduction
The Dash 8-Q400 is a high wing aeroplane manufactured by Bombardier Aerospace with shared
interests from several partners (Figure 12.1-1). It is powered by two 5071 shaft horsepower PW
150A turboprop engines. Each engine drives a six bladed propeller. The Dash 8 is a two pilot
transport category aeroplane approved for instrument flight and in SAS versions approved for
operation to a maximum altitude of 25,000 feet.
In SAS versions the aeroplane seats from 58 to 72 passengers and two cabin crew members in
addition to the pilot, copilot, and flight observer. In SAS version It has a maximum take-off mass
of:
• 27987 kg (Basic Gross Mass)
• 28998 kg (Intermediate Gross Mass)
• 29257 kg (High Gross Mass)
The aeroplane has an Active Noise and Vibration Suppression (ANVS) system.
12.1.2 General
The fuselage (Figure 12.1-1) is constructed in three main parts:
• Forward
• Center
• Aft
The forward section includes the flight deck, which has the majority of controls, instruments, and
indications. Circuit breaker panels are located on the flight deck aft bulkhead, and behind the
pilot's and copilot's seats.
There is a forward baggage compartment on the right forward part of the fuselage, and an aft
baggage compartment forward of the aft pressure bulkhead. Both baggage doors open outwards
and can only be opened from the outside. The passenger compartment doors and one type II/III
exit can be opened from either the inside or outside.
Dash8 - Q400 - Aeroplane General
Page 1
Figure 12.1-1 Fuselage Sections84F0601 C Al ti C t l d I di ti M ltil D t il i
CA
BIN
NO
SE
FOR
WA
RD
SE
CTI
ON
CE
NTR
ES
EC
TIO
NA
FTS
EC
TIO
N
BA
GG
.C
OM
P.
FLIG
HT
CO
MP
.
FOR
WA
RD
PR
ES
SU
RE
BU
LKH
EA
D
FOR
WA
RD
PA
SS
EN
GE
RD
OO
R
AFT
PA
SS
EN
GE
RD
OO
R
AFT
BA
GG
AG
ED
OO
R
AFT
PR
ES
SU
RE
BU
LKH
EA
D
FL
IGH
T
Dash8 - Q400 - Aeroplane General
Page 2
12.1.3 Controls and Indications - General
Dash8 - Q400 - Aeroplane General
Page 3
Figure 12.1-2 Flight Deck and Equipment Layout
12
3
4
18
5
689
11
5
12 13
1921 20
LEGEND
1. Flow Control Levers. 2. Pilot's Map Table (Closed). 3. Steering Hand Control. 4. Pilot's Side Panel. 5. Life Vest Stowage. 6. Sun Visor. 7. Eye Level Indicator. 8. Utility Light. 9. Dome Light.10. Emergency Escape Rope Storage.11. Emergency Exit.
12. Overhead Console.13. Standby Compass.14. Caution & Warning Panel.15. Landing Gear Alternate Release Door.16. Glareshield.17. Copilot's Side Panel.18. Copilot's Map Table (Open).19. Instrument Panel.20. Landing Gear Alternate Extend Door.21. Centre Console.22. Smoke Goggles.
6
2222
10
7
14 9
815
16
17
1
Dash8 - Q400 - Aeroplane General
Page 4
Figure 12.1-3 Aft Flight Deck and Equipment Layout
ISCM
1
2
3
4
5 64
3
7
2
8
910111213141516
LEGEND
1. Variable Frequency AC Circuit Breaker Panel. 2. Headset Jacks. 3. Circuit Panel Light. 4. Oxygen Mask. 5. Mirror. 6. Viewer. 7. Avionics Circuit Breaker Panel. 8. Left DC Circuit Breaker Panel. 9. Fire Axe.10. Fire Extinguisher.11. Flashlights.12. Observer's Seat.13. Weight and Balance Manual.14. Landing Gear Emergency Extension Handpump Handle.15. Protective Breathing Equipment (PBE).16. Right DC Circuit Breaker Panel.
Dash8 - Q400 - Aeroplane General
Page 5
Figure 12.1-4 Overhead Console
1. Ice protection panel.
2. DC Control panel.
3. Audible evacuation panel.
4. Flight data recorder.
5. Fire protection panel.
6. Panel lighting panel.
7. AC Control panel.
8. Air conditioning panel.
9. Emer. lights (Caution/Advisory)
panel.
10. Exterior lights panel (Right).
11. Cabin altitude panel.
12. Engine start panel.
13. APU Panel.
14. PFD Altimeter units panel.
15. Altitude/differential placard.
16. Exterior lights panel (Left).
17. Cabin altitude indicator.
LEGEND
- +
1
2
3 14 5 6 7 8
910111213 4151617
Dash8 - Q400 - Aeroplane General
Page 6
Figure 12.1-5 Handwheel
A
12
34
5
NOTE
Pilot's equipment shown.Copilot's equipment similar.
LEGEND
1. Transmit/Interphone PTT Switch.2. Elevator Trim Switch.3. Tactile Control Steering Pushbutton.4. Autopilot Disengage Pushbutton.5. ATC Ident Pushbutton.
Dash8 - Q400 - Aeroplane General
Page 7
Figure 12.1-6 Left Glareshield Panel
Dash8 - Q400 - Aeroplane General
Page 8
LEFT GLARE SHIELD CALLOUTS
1. AEROPLANE IDENTIFIER
2. ENGINE FIRE PRESS TO RESET SWITCHLIGHT
3. ROLL OUTBD & ROLL INBD SPOILERS LIGHT
4. ELEVATOR TRIM PUSH OFF SWITCHLIGHT
5. STICK PUSHER OFF SWITCHLIGHT
6. CLOCK
7. PULL UP GPWS TEST LIGHT & BELOW G/S LIGHT
8. A/P DISENGAGE LIGHT
9. TERRAIN INHIBIT SWITCH
10. CAUTION PRESS TO RESET SWITCHLIGHT
11. WARNING PRESS TO RESET SWITCHLIGHT
12. FLIGHT/TAXI SWITCH
13. PROPELLER GROUND RANGE LIGHTS
Dash8 - Q400 - Aeroplane General
Page 9
Figure 12.1-7 Center Glareshield Panel
b13
01d
01/0
5/00
COURSE
HDG
NAV SOURCE
ALT
NOSE DN
NOSE UP
HDGAP
YD
NAV SOURCE COURSE
HDG
PUSH
OFF
PUSH
OFF
PUSH
OFF
PUSH
OFF
POWERED FLIGHT CONTROL SURFACES
RUD 1 RUD 2SPLR 1 SPLR 2
IAS
VS
VNAV
ALT
ALT
SEL HSI
SEL
NAV
APPR
BC
STBY
2 3 4 5 6 7 3 2
11 8
Dash8 - Q400 - Aeroplane General
Page 10
CENTER GLARESHIELD CALLOUTS
1. HDG SELECTION KNOB
2. COURSE SELECTION KNOB
3. NAV SOURCE SELECTION KNOB
4. RUD 1 PUSH OFF SWITCHLIGHT
5. SPLR 1 PUSH OFF SWITCHLIGHT
6. SPLR 2 PUSH OFF SWITCHLIGHT
7. RUD 2 PUSH OFF SWITCHLIGHT
8. ALT SELECTION KNOB
Dash8 - Q400 - Aeroplane General
Page 11
Figure 12.1-8 Right Glareshield Panel
OY-KCA1
2 3 4 5 67
8
9
1011
Dash8 - Q400 - Aeroplane General
Page 12
RIGHT GLARE SHIELD CALLOUTS
1. TERRAIN INHIBIT SWITCH
2. AP DISENGAGE LIGHT
3. PULL UP GPWS TEST LIGHT & BELOW G/S LIGHT
4. CLOCK
5. ELEVATOR TRIM PUSH OFF SWITCHLIGHT
6. STICK PUSHER OFF SWITCHLIGHT
7. ENGINE FIRE PRESS TO RESET SWITCHLIGHT
8. AEROPLANE IDENTIFIER
9. ANTI SKID SWITCH
10. WARNING PRESS TO RESET SWITCHLIGHT
11. CAUTION PRESS TO RESET SWITCHLIGHT
Dash8 - Q400 - Aeroplane General
Page 13
Figure 12.1-9 Instrument Panel
Dash8 - Q400 - Aeroplane General
Page 14
Figure 12.1-10 Forward Center Console
Dash8 - Q400 - Aeroplane General
Page 15
Figure 12.1-11 Center Console
F
L
A
P
S
0
5
10
15
35
0
0
0
0
0
CONTROL
LOCK
RATING
P
ER
EMERG
BRAKE
ELEVATOR
TRI
M
TO
RATING
CONTROL
LOCK
FLIGHTIDLE
MAXREV
PARK
ND
NU
OFF
ON
1 2
OFF
ON
WO
PROP
900
900
MAX1020
MIN850
START &FEATHER
FUELOFF
1 2
1 2 3
4 5 6 7 8
LEGEND
1. Emergency Brake Lever.2. Control Lock Lever.3. Flap Selector Lever.4. Elevator Trim Indicator.
5. #1 Power Lever.6. #2 Power Lever.7. #1 Condition Lever.8. #2 Condition Lever.
Dash8 - Q400 - Aeroplane General
Page 16
Figure 12.1-12 Aft Center Console
LEGEND
1. Audio and Radio Control Display Unit (ARCDU).2. Trim Control Panel.3. Engine and System Integrated Displays Control Panel (ESCP).4. Weather Radar Control Panel.
1 2 1
3 4
Dash8 - Q400 - Aeroplane General
Page 17
Figure 12.1-13 Aft Center Console
ESCP CALLOUTS PERTAINING TO DOORS
1. DOORS SYS PUSHBUTTON (momentary action)
PUSH - shows doors system page on the MFD (upper area) with MFD 1 or MFD 2 set at SYS
- no action with another push
ENG
SYSNAV
PFD
MFD1
ENG
NAVSYS
PFD
MFD2
ELEC SYS
ENGSYS
FUEL SYS
DOORS SYS
ALL TEST
NORM1 2
EFISATT/HDG
SOURCEADC
OFF
ED BRT
NORM1 2
SOURCE
EFIS
1
Dash8 - Q400 - Aeroplane General
Page 18
Figure 12.1-14 Steering Handwheel Console
GRD CREW FWD AFT
GPWS FLAP OVERRIDE
F W ARD
OR
STEERING RANGE
5 4
1 2 3
LEGEND
1. Ground Crew Connection Annunciator.2. GPWS Flap Override Switchlight.3. Push to Talk (PTT) Switch.4. Steering Range Label.5. Steering Hand Control.
Dash8 - Q400 - Aeroplane General
Page 19
Figure 12.1-15 Pilot’s Side Panel
CIR BKR LIGHT
W/S WIPERICE DETECT
PILOTSFLT PNL
PROP O'SPEEDGOVERNOR
T/O WARN TEST
OFF
LIGHT
ADCTEST 1
TEST 2 TEST 2
OFF BRT
STALL WARN TEST 1
OFF
STEERING
OFF
TEST
1 2 3 4
5 6 7 8
LEGEND
1. Circuit Breaker Panel Lighting Control Toggle Switch.2. Windshield Wiper Ice Detection Light Pushbutton.3. Pilot's Side Panel Dimmer Knob.4. Propeller Overspeed Governor Test Toggle Switch.5. Takeoff Warning System Test Toggle Switch.6. Air Data Computer Test Toggle Switch.7. Stall Warning Test Toggle Switch.8. Nosewheel Steering Toggle Switch.
Dash8 - Q400 - Aeroplane General
Page 20
Figure 12.1-16 Copilot’s Side Panel
W/S WIPERICE DETECT
LIGHT
COPILOTS FLT PNL
OFF BRT
CIRCUITBREAKERPNL LTG
OFF
INPH XMIT
1 23
4
LEGEND
1. Windshield Wiper Ice Detection Light Pushbutton.2. Copilot's Side Panel Dimmer Knob.3. Circuit Breaker Panel Lighting Control Toggle Switch.4. Microphone Interphone/Transmit Toggle Switch.
Dash8 - Q400 - Aeroplane General
Page 21
Figure 12.1-17 Cabin (F/A) Attendant’s Panel
F/A CONTROL ENABLED
LIGHTING
MID CABIN TEMP
WARM
COOL
CABIN OVERHD
NVS INOP
BOARDING LAVATORY AIRSTAIR DOOR
PSU ON/OFF
PSU TEST
ON/OFF PAUSE
NVS SYSTEM CABIN TEMP
TEMP DISPLAY
DISPLAY TEST
°C
°F
CABIN SIDEWALL
DIM SIDEWALL
DIM OVERHD
1. Temperature display.
2. Temp. display test switch.
3. Temperature scale switch.
4. Cabin sidewall lighting switch.
5. Cabin overhead lighting switch.
6. PSU Test switch.
7. NVS Inoperative advisory light.
8. NVS On/Off switch.
9. NVS Pause switch.
10. F/A control enabled
advisory light.
11. PSU Power switch.
12. Airstair steps lighting
switch.
13. Lavatory lighing switch.
14. Boarding lights switch.
15. Temperature decrease
switch.
16. Temperature increase
switch.
17. Temperature scale.
LEGEND
1 2 3 4 5 6 7 8 9
17 16 15 14 13 12 11 10
Dash8 - Q400 - Aeroplane General
Page 22
Towing Switch
Description.
The TOW-NAV Lt Switch is a standard 2-position switch with a Guard that forces it to NORMAL
(the other is TOWING).
In addition there is a 7,5 Amp Circuit Breaker for the Power.
Power is taken directly from the main battery at a point behind the DC CONTROL panel and feed
via the TOW Circuit Breaker & Switch to a point behind the EXTERIOR LIGHTS panel.
The towing personnel shall only flip the guard and place the switch in TOW.
After towing is done, the guard is closed and the Switch goes to normal.
Dash8 - Q400 - Aeroplane General
Page 23
Figure 12.1-18 Aeroplane Dimensions
93ft 3in.
43.31in.
28ft 10in.
13ft 6in.
107ft 9in.
27ft 4in.
45.94in.
101ft 10in.
60.83in.
10ft 9in.
GROUND
REFERENCE LINE
60.85in.48.98in.
12ft 4in.
*
* * * *
*
NOTE
36ft 10in.
8ft 2in.
30ft 5in.
DIHEDRAL 2.5o38.67in.
12ft 10in.
25ft 8in.
*
*
*
Dimensions with respect to ground
reference line are approximate and
will vary with aeroplane configuration
and loading conditions.
*
(28.42m)
(9.27m)
(4.11m)
(1.10m)
(8.80m)
(98.22cm)
(3.92m)
(7.81m)
(2.48m)
(11.22m)
(3.76m)
(8.34m)
(1.55m)(1.55m)(1.24m)(1.17m)
(31.04m)
(32.83m)
(3.28m)
Dash8 - Q400 - Aeroplane General
Page 24
12.1.4 Description
12.1.4.1 Aeroplane Dimensions
The Dash 8 Q400 has a wing span of 28.42 m and a length of 32.83 m (Figure 12.1-18). The six
bladed propellers are 4.12 m in diameter, and clears the fuselage by 1.1 m). The wheel track is
8.80 m and the nose wheel to main wheel distance is 13.94 m. Using a nose steering of 70°
requires a minimum 25.7 m of pavement for a 180° turn (Figure 12.1-19).
The height to the bullet fairing, on top of the vertical stabilizer is about 8.26 m depending on the
aeroplane loading. The height to the wing tips is about 3.9 m.
12.1.4.2 Structural Design
The airframe structure is made from high strength aluminum alloys. The fuselage skins are
chemically milled and riveted to stringers and frames. Steel structural alloy is used in the landing
gear and certain airframe components. Other structural components are made from various
approved aluminum, steel or titanium materials. Magnesium is used in selected interior regions
of the flight deck, cabin and engine.
Composite panels include the:
• Radome (Fiberglass/honeycomb core)
• Nose Equipment Bay (Aramid fiber)
• Wing to Fuselage Fairings (Fiberglass)
• Tailcone (Aramid fiber)
• Tailcone with optional APU (Titanium)
• Bullet Fairing (Mybrid composite Glass/Aramid fiber)
• Dorsal Fin (Mybrid composite Glass/Aramid fiber)
• Stabilizer leading edge (Aramid fiber covered by rubber de-ice boots)
• Ice Protection Panels
12.1.5 Forward Section
12.1.5.1 Nose
The nose is in front of the forward pressure bulkhead. It contains the nose wheel well and an
unpressurized equipment deck, and the weather radar radome.
12.1.5.2 Flight Deck
The flight deck extends from the forward pressure bulkhead to a fixed bulkhead aft of the flight
crew seats. The windshield panels are laminated glass and the side window panels are a combi-
nation of laminated glass and plastic.
Dash8 - Q400 - Aeroplane General
Page 25
Figure 12.1-19 Aeroplane Turning Radius
RADIUS
4 ft. 9 in. (1.52 m)33 ft. 10 in. (10.32 m)50 ft. 7 in. (15.41 m)64 ft. 9 in. (19.74 m)
54 ft. 10 in. (16.73 m)62 ft. 9 in. (19.13 m)
ITEM
R-1 INNER GEARR-2 OUTER GEARR-3 NOSE GEAR
R-4 WING TIPR-5 NOSE
R-6 ELEVATOR TIP
70
R-3
R-1
R-2
R-5
R-4 R-6
84 ft. 5 in. (25.7 m)MINIMUM PAVEMENT
WIDTH FOR 180 TURN(WITHOUT BACKING UP)
APPROX. 2DUE TO TIRESLIP
Dash8 - Q400 - Aeroplane General
Page 26
Figure 12.1-20 Wing Detail
LE
GE
ND
1. A
ilero
n.2.
Gea
red
Tab.
3. G
ND
Adj
usta
ble
Tab.
4. R
oll S
poile
rs.
5. O
utbo
ard
Flap
.6.
Inbo
ard
Flap
s.
12
34
5
6
54
21
Dash8 - Q400 - Aeroplane General
Page 27
12.1.6 Wings
A single, high aspect ratio, cantilevered wing is joined to the upper midsection of the fuselage(Figure 12.1-20), and includes:
• Integral fuel tanks• Nacelles and main gear mounting structures• Ailerons • Flaps• Spoilers
The portions of the wing outboard of the engine nacelles are tapered and have a 2.5° dihedral.Pneumatic deicer boots are installed on the leading edges of the center wing sections and out-board from the landing lights. The wing has single slotted flaps extending from the side of thefuselage to inboard of the ailerons.
Conventional ailerons are installed for lateral control and work with differential lateral controlspoilers on the upper wing skin. The spoilers also have a ground mode. When set the spoilersextend on landing to reduce lift.
Dash8 - Q400 - Aeroplane General
Page 28
Figure 12.1-21 Empenage
2
3
1
4
6
5
LEGEND
1. Elevators.2. Fore Rudder.3. Trailing Rudder.4. Vertical Stabilizer.5. Bullet Fairing.6. Horizontal Stabilizer.
Dash8 - Q400 - Aeroplane General
Page 29
Figure 12.1-22 Fuselage Cross Section
106.
0 in
.(2
69.2
cm
)
20.3
in.
(50.
8 cm
)
99.0
in.
(251
.4 c
m)
15.8
in.
(40.
1 cm
)
76.9
in.
(195
.3 c
m)
24.3
in.
(61.
7 cm
)
12.4
in.
(31.
5 cm
)
80.0
in.
(203
.2 c
m)
25.9
in.
(65.
7 cm
)
56.5
in.
(143
.5 c
m)
NO
TE
Dim
ensi
ons
are
appr
oxim
ate
and
may
var
y de
pend
ing
on
airc
raft
conf
igur
atio
n.
OV
ER
HE
AD
STO
RA
GE
BIN
S
108.
8 in
.(2
76.3
cm
)
71.8
in.
(182
.3 c
m)
Dash8 - Q400 - Aeroplane General
Page 30
12.1.7 Centre Section
The passenger cabin has a constant cross-section and bulkheads with a slightly flattened bottom
(Figure 12.1-22).
12.1.8 AFT Section
The aft section is unpressurized and is swept up from the center section. It consists of the rear
pressure dome and the supporting structure for the empennage. This area houses the air condi-
tioning packs and the APU. There is access to the interior of the aft fuselage section for inspec-
tion and maintenance.
Empenage
The empennage has a horizontal stabilizer with separate right and left elevators, and a vertical
stabilizer with fore and trailing rudders. The empennage is mounted on the aft fuselage section
(Figure 12.1-21).
Horizontal Stabilizer
The fixed incidence horizontal stabilizer is attached to the top of the vertical stabilizer. The lead-
ing edges are made from composite material and have pneumatic deicer boots bonded to them.
Elevators
Both elevators normally operate together, but can function independently if the pitch disconnect
system is operated. The elevators are hydraulically operated with artificial feel. Hydraulic actua-
tors are used for trimming.
Vertical Stabilizer
The vertical stabilizer and rearmost portion of the fuselage are constructed as one piece. The
leading edge is made from composite material and has a pneumatic deicer boot, with two cham-
bers, bonded to it. A composite bullet fairing is installed on top of the vertical stabilizer.
Rudder
The rudder has a fore and trailing section. The fore rudder is hinged to the rear vertical stabilizer
spar and the trailing rudder is hinged to the trailing edge of the fore rudder. The trailing rudder is
geometrically arranged to give a deflection twice that of the fore rudder. Two hydraulically pow-
ered actuators operate the rudder.
Dash8 - Q400 - Aeroplane General
Page 31