Q and A time on the 737

[badderjet 181]

The check for TR serviceability is current, not voltage, because the TR voltage indicates that of the associated DC busses (for TR's 1 & 2). TR's should always be checked before commencing an autoland because the TR3 disconnect relay / cross bus tie relay opens at glideslope capture and this will leave DC Bus 1 unpowered if TR1 had previously failed. NG's have a TR UNIT light which illuminates if either TR1 or TR2 and TR3 fail in flight or if any TR's fail on the ground. The TR's are unregulated and output rated to 50 Amps.

Did you get this info from SmartCockpit?

[Jack_C 1]

Question #6 : How tired is Jkac after a red eye1) so tired he can't even spell his name right2) So tired that hzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzOk but the real question is:During engine start, as the engine N2 accelerates through 50% you notice the oil press is still 0. What do you do?Jack C

[Nickdj 0]

Wait until the engine is stable at idle. If there is no oil pressure do the aborted engine start.cheersNick de J.

[MorsAbAlto 19]

Did you get this info from SmartCockpit?

No... but there are also dedicated 737 sites around. I found the info about the TR check on b737.org.uk.

[badderjet 181]

No... but there are also dedicated 737 sites around. I found the info about the TR check on b737.org.uk.

Hey, thanks. Great place to hang around I see. Will check it out.

[AA762 1]

Well, either way, you must land. I'm not sure what else you'd do, it would be a crash landing, if there is no sensor problem.

[des182001 1]

Wait until the engine is stable at idle. If there is no oil pressure do the aborted engine start.cheersNick de J.

That's what I think as well, since the oil scavenger pump may not provide enough pressure to the return tank at low N2 values.

[captdini 3]

Question #6 : How tired is Jkac after a red eye1) so tired he can't even spell his name right2) So tired that hzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzOk but the real question is:During engine start, as the engine N2 accelerates through 50% you notice the oil press is still 0. What do you do?Jack C

Start lever to cut out. Motor the engine for 60 seconds and then start switch to off/auto.Dinshaw Parakh.

[Jack_C 1]

Nick De J gets it correct. You guys are getting too good. Ok here goes another.#7 During an engine start when do the EEC's become active?

[des182001 1]

The EEC powers on when N2 reaches greater than 15%

[Guest Boeing Skunk Works]

When is the CVR activated?

[Jack_C 1]

And Dan gets it.#8 Can you perform a take off with frost on the wing?

[Guy014 9]

No, you cannot takeoff with frost on any of the critical surfaces.

[des182001 1]

Takeoff with a light coating of frost, up to 3 mm (1/8 inch) in thickness on lower wing surfaces due to cold fuel is permissible. But, all leading edge devices, all control surfaces, tab surfaces,upper wing surfaces can't have snowor ice.

[des182001 1]

When is the CVR activated?

It's on whenever 115V AC is applied to the aircraft.