PPRuNe Forums - View Single Post - FMS VNAV and altimeter setting.
View Single Post
Old 16th Jan 2006, 16:33
  #11 (permalink)  
safetypee
 
Join Date: Dec 2002
Location: UK
Posts: 2,479
Likes: 0
Received 12 Likes on 8 Posts
Re: FMS VNAV and altimeter setting.

Originally Posted by ITCZ
So safetypee, your question is not about an altimeter mismatch, your question is what if BOTH pilots did not set the appropriate altimeter subscale for descent and landing, yes?
Yes.
In addition, my question is about the hazards of incorrect altimeter setting in general, and the association with FMS profile descents in particular.
If the altimeter settings are mismatched there could be a grater probability of detection as both the scale and altimeter readings differ. However, where the subscales agree this might go unnoticed, and the even more likely situation where both altimeters remain on 29.92 is particularly hazardous with FMS profile operations and the resulting lack of MSAW backup.
From a threat and error management aspect, a mis-set altimeter subscale remains a significant threat to safe operations, and requires specific procedures to avoid or identify any error.

The questions arising from the above are that does use of advanced technology make pilots less attentive and does the industry need to review SOPs where technology could initially hide some of the threats and errors.
safetypee is offline