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-   -   'Setting Standard' on analogue alt. (737/757) (https://www.pprune.org/tech-log/10398-setting-standard-analogue-alt-737-757-a.html)

Propellerhead 30th September 2001 14:23

'Setting Standard' on analogue alt. (737/757)
 
Ok, this might sound pedantic, but it becomes relevent when we are doing altimiter checks accurate to 10' in RVSM airspace:

When you call 'set standard', what do you set? Most set 1013, which is not quite right. I understand that you should set 29.92 Ins (on the other scale), as this is the STANDARD pressure setting of 1013.2mb(hpa).
29.92 is EXACTLY 1013.2 (multiply by 33.86389).
Is this right?

Phoenix_X 30th September 2001 21:35

The pressures you mention are correct, and personally I set 29.92, though I too realise that it's a bit academic.... It just feels better I suppose :)

redbug 30th September 2001 22:53

Since the introduction of RVSM airspace, my Comany SOPs changed so that we now set 29.92, and, when passing FL200, make another altimeter crosscheck to ensure that they are within RVSM limits.

Propellerhead 30th September 2001 23:07

Thanks for the replies.
Redbug, I've sent you a private message.
Best Regards,
Prophead


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