# Tag Info

49

The light is a tail-strike indicator. Touched Runway system The Touched Runway system provides a warning light in the flight compartment. It illuminates when the aft fuselage makes hard contact with the runway on take off or landing. The system consists of a frangible1 switch located at the bottom of the aft fuselage, activating the ...

30

The props are done before starting because you need to make sure the blades and spinners are fully cleaned off while they are stationary. Otherwise, they'd vibrate like hell when starting and shed bits of ice all over. Also, if you just sprayed the props while running the engines would ingest a lot of glycol, which, if it doesn't make the engine flame out, ...

21

To supplement Transistor's answer: The reason for the light is that tailstrikes are very easy to do on the 400 due to the stretch of the rear fuse with not enough landing gear lengthening to compensate, so they are more limited to the deck angle when landing and taking off than most a/c. This isn't a problem on the other shorter -8s and is mostly unique to ...

19

It is the engine drain mast. From the Dash 8 Series 400 airport planning document - Chapter 2, Page 40: Dash 8 engine drain; image from Dash 8 Series 400 airport planning document Basically, the drain mast houses the drains that allow for the removal of the fluids (oil and fuel) that come out of the engine, due to seepage, leaks etc. For example, this ...

13

Well, for starters, the speeds are actually pretty significantly different. The Cseries is almost 25% faster than the Q400. Swept airfoils are much more efficient at those higher speeds, as are jet engines. The Q400 is also a wildly stretched version of the original DeHavilland Canada DHC-8 (Dash 8), which was itself based on the 4-engine DHC-7 (Dash 7) ...

13

Given the location of the snake from the photos/video in the article and the height of the wing/engine assembly (as shown below) I think it's entirely possible to miss this critter in preflight. A visual inspection of the control surfaces is certainly a part of the preflight, but unlike on a small aircraft (say a Piper Cherokee or Cessna 172) you will ...

9

Before the main cabin door is closed, the ramp personnel will deliver a cargo sheet that lists number of checked bags number of gate checked bags number of heavy checked bags pounds of commercial cargo pounds of company cargo With numbers broken down by cargo bin where accurate. The flight attendant will deliver a sheet with passenger count in zones. The ...

6

According to smartcockpit.com, warning is given when the gear has not been extended and the aircraft is in the landing configuration. Specifically, • All landing gear not down and locked, flaps selected to 15 or 35$^{\circ}$, and both power levers at any position less than 50% torque. • Landing gear not down and locked, one or both power levers at or ...

6

It's because the critical case that autofeather caters to is engine failure right after V1, on takeoff, where the normal identify/feather drill uses up precious time. An engine failure on a missed approach or go-around starts well above the low energy state of an engine failure after V1 and there is much more time and energy margin to do the normal ...

5

Ice flying off the propellers can damage something, or someone. Also unbalances the propeller assembly overall, leading to vibrations. Little bit of ice left on the fuselage is not bad, only causes some extra drag until it sublimates off, and of course a little extra weight. Ice Will impact the lift created by the wings, that is very bad, unless the ice is ...

4

It's a drain, as explained previously... PW100 series tend to leak a lot of oil as part of their design, so this is a drain where leaks from normal, healthy, places can come out. The design of the drain keeps the oil away from the nacelle so it's easier to differentiate normal oil seepage from an abnormal leak... which would spread orange oil all over the ...

4

It is a mechanical checklist where each item on the list can be flipped to indicate that is has been checked. You can see it in operation in this YouTube video (which I believe is where you got the image from). Each of the 6 stacks can be extended to check the items and then collapsed again in order to not obstruct the pilot's view. It is not a default part ...

3

The same statement is made here in a document describing the PW150 turboprop engine, which powers the de Haviland Canada, now Bombardier, Dash-8. It gives a little more detail in section 12.23.14.4, NH overspeed protection. It says: The PW150A Powerplant has an independent overspeed (O/S) protection circuitry (dual chan- nel) built into the FADEC ...

3

To further elaborate on aeroalias' answer, "terrain clearance inadequate" is determined by the radar altimeter. If the radar altimeter returns an altitude lower than the threshold and the gear is not extended, the warning will sound.

2

The Dash8 - Q400 - Aeroplane General PDF (courtesy of smartcockpit.com) indicates on page 27 that there are inboard and outboard flaps. Reading through the Dash8 - Q400 Flight Controls PDF (also from smartcockpit.com) indicates that: Two single-slotted inboard and outboard fowler flaps are attached to the trailling edge of each wing (Figure 12.8-1).page ...

1

There is no point to use autofeather when there is no great benefit of that because: Multiplying the phases where you rely on it, is multiplying the risk to forget it armed, and this feature being forgotten has been a source of incidents that could have turned into dramatic accidents. Please refer to the following very interesting Website: https://assets....

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