v1valarob
Well-Known Member
The picture below is actually pretty boring, but here is the story to go with it.
This was the weather yesterday at Dulles:
[FONT=Monospace,Courier]KIAD 141852Z 18004KT 3/4SM BR OVC004 12/12 A2989 RMK AO2 SFC VIS 4 SLP121 T01220117
So every time we would come into Dulles we were shooting an approach to just above minimums. The first 2 legs were IAD - CRW - IAD. We flew out to CRW just fine, but on the way back I noticed the red "VIB" flag on my altimeter. The altimeter would also stick by 500 feet. The captains altimeter which has a completly seperate system to mine would show us going through 2000' while mine would stick at 1500' and then come unstuck and quickly swing around to match up. When we finally leveled off, my altimeter was almost 125' off of the captains, and just as a joke I tapped on the glass face, but it actually began to correct itself by 10' every time I tapped on it. So I tapped until it was pretty close to correct.
My altimeter in the decent would always lag by about 100' so as we began our approach into Dulles my call outs were based on what I saw on the captains side, I decided not trust my instruments. We landed at Dulles and we were supposed to have a quick turn back out to MGW. However since the red flag was still up, he wrote up the altimeter and grounded the plane.
Fast forward to 2.5 hours later, we finally have a plane with a new altimeter. Finally its my leg, the Captain flew the first 2 legs and I was going to take the rest of the day. So we are cleared for take off, and as you do in the Saab, the captain controls the steering until 80kias when the first officer makes the "80 Knots" call out to verify we are both reading the same thing. At that time the captain either says "My controls" or "Your controls" this time he said my controls as it was my leg, and I took over the steering. The captain then called v1, Rotate, and off the ground we were.
In the Saab all of the autopilot is run off of the captains side. His side has an air data computer (ADC.) We also prefer to climb out at an airspeed instead of a vertical speed. So as we are climbing out, I keep hitting the vert sync button on my yoke. The speed at which the captains side airspeed indicator is indicating, will show up in the top right of the efis screen as you can see in the picture. As we climb out we are about 400' AGL and we are IMC and I hit the vert sync button, my side is showing around 140kias but when I hit the vert sync, 150kias shows up. I know that normally they are off by 2 or 3 knots, but never 10. So I click it again and its off by 15 knots. My airspeed begins to decrease down to 120, and I lower the nose to gain some speed. I then ask the captain what his side is showing and its reading 180kias, and the stand-by airspeed indicator is showing 180kias. We quickly realize my side is messed up, and the captain takes the controls. So we reorganize a bit, and I take over radios and he flys the plane. Pretty much just like you do in the sim, this is a fairly common problem they throw at you in the sim.
We call ops and they tell us to keep going to our destination. I was glad I brought my over night bag. However a few hours after we land we get an FAA ferry permit and bring the plane back to Dulles. It was very strange not having any of my normal instruments working during the whole flight. Sometimes at a split second I would forget mine were off, and would think something was wrong.
Anyway, here is the picture. We are climbing at 174kias going through 7000' for 8000'.
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This was the weather yesterday at Dulles:
[FONT=Monospace,Courier]KIAD 141852Z 18004KT 3/4SM BR OVC004 12/12 A2989 RMK AO2 SFC VIS 4 SLP121 T01220117
So every time we would come into Dulles we were shooting an approach to just above minimums. The first 2 legs were IAD - CRW - IAD. We flew out to CRW just fine, but on the way back I noticed the red "VIB" flag on my altimeter. The altimeter would also stick by 500 feet. The captains altimeter which has a completly seperate system to mine would show us going through 2000' while mine would stick at 1500' and then come unstuck and quickly swing around to match up. When we finally leveled off, my altimeter was almost 125' off of the captains, and just as a joke I tapped on the glass face, but it actually began to correct itself by 10' every time I tapped on it. So I tapped until it was pretty close to correct.
My altimeter in the decent would always lag by about 100' so as we began our approach into Dulles my call outs were based on what I saw on the captains side, I decided not trust my instruments. We landed at Dulles and we were supposed to have a quick turn back out to MGW. However since the red flag was still up, he wrote up the altimeter and grounded the plane.
Fast forward to 2.5 hours later, we finally have a plane with a new altimeter. Finally its my leg, the Captain flew the first 2 legs and I was going to take the rest of the day. So we are cleared for take off, and as you do in the Saab, the captain controls the steering until 80kias when the first officer makes the "80 Knots" call out to verify we are both reading the same thing. At that time the captain either says "My controls" or "Your controls" this time he said my controls as it was my leg, and I took over the steering. The captain then called v1, Rotate, and off the ground we were.
In the Saab all of the autopilot is run off of the captains side. His side has an air data computer (ADC.) We also prefer to climb out at an airspeed instead of a vertical speed. So as we are climbing out, I keep hitting the vert sync button on my yoke. The speed at which the captains side airspeed indicator is indicating, will show up in the top right of the efis screen as you can see in the picture. As we climb out we are about 400' AGL and we are IMC and I hit the vert sync button, my side is showing around 140kias but when I hit the vert sync, 150kias shows up. I know that normally they are off by 2 or 3 knots, but never 10. So I click it again and its off by 15 knots. My airspeed begins to decrease down to 120, and I lower the nose to gain some speed. I then ask the captain what his side is showing and its reading 180kias, and the stand-by airspeed indicator is showing 180kias. We quickly realize my side is messed up, and the captain takes the controls. So we reorganize a bit, and I take over radios and he flys the plane. Pretty much just like you do in the sim, this is a fairly common problem they throw at you in the sim.
We call ops and they tell us to keep going to our destination. I was glad I brought my over night bag. However a few hours after we land we get an FAA ferry permit and bring the plane back to Dulles. It was very strange not having any of my normal instruments working during the whole flight. Sometimes at a split second I would forget mine were off, and would think something was wrong.
Anyway, here is the picture. We are climbing at 174kias going through 7000' for 8000'.
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