QRH, systems knowledge (from college thread)

[BobDDuck]

Originally Posted by Check_Six

Well, to be honest, I'm not really that concerned with upgrade orals. It would be ignorant to show up for something like that without the appropriate systems knowledge that your company requires. But, how about real life?

I think you've got it backwards.

Real life is where you need the systems knowledge. Knowing the checklists will get you through 99% of all training events.

[BobDDuck]

Originally Posted by PCL_128

I don't know about PSA, but there was no company procedure at PCL for such an event on the ground. Using EMER STOW is procedure for use in the air, and it's not advisable on the ground.

This whole discussion actually (as far as PSA goes) is now something of a moot point. We redid our QRH about 6 months ago, and the new one actually does mention not using the procedure on the ground. The old one (which is no longer available) did in fact NOT say anything about it.

[triple7]

Coming out of EWR one night, as we raised the gear we heard a loud thud. Hmmmm....made us both look at each other puzzled. Within seconds the EICAS dinged with a "hydr 1 low quantity" advisory. Now granted this was just an advisory message, and the QRH said squat about it. We looked at our hydr page and quickly realized that system 1 was bone dry, and what we heard was a return line popping; spraying skydrol all over Elizabeth NJ. Now granted, we havn't had any type of failure to this point, so the QRH was essentially worthless in its guidance. We did however, by drawing on systems knowledge, be able to deduce what would happen when we tried to access any of the systems on the #1. By knowing we wouldnt have spoilers, outboard braking, tr's, and steering we were able to plan accordingly on the landing and tell ATC what to expect. As it was we rolled to the end with max braking(standing on the pedals) and no steering. Had we not planted it on the numbers of 22L we might have ended up in the F lot.

Just a story I felt like sharing.

[FlyChicaga]

Originally Posted by triple7

Now granted this was just an advisory message, and the QRH said squat about it. We looked at our hydr page and quickly realized that system 1 was bone dry, and what we heard was a return line popping; spraying skydrol all over Elizabeth NJ. Now granted, we havn't had any type of failure to this point, so the QRH was essentially worthless in its guidance.

No offense, but we have a very detailed procedure for "Hydraulic System 1 Failure" in the QRH. That is exactly what that was, regardless of the EICAS messages presented.

[triple7]

Originally Posted by FlyChicaga

No offense, but we have a very detailed procedure for "Hydraulic System 1 Failure" in the QRH. That is exactly what that was, regardless of the EICAS messages presented.

Nothing had failed though. You and I both know what was about to fail, but because we couldnt definitively say that yes, we had a hydr sys 1 fail we couldnt with 100% certainty say what would happen. Ultimately when we lowered the gear the #1 pump failed, then when the wheels touched down stuff starting lighting up on the eicas. We were just going on what we knew, and what we thought we knew. And that was under the direction of MX.