Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
"Appreciable Effect On Weight And Balance"  
User currently offlineshiny From Germany, joined May 2012, 33 posts, RR: 0
Posted (3 years 3 days 15 hours ago) and read 7457 times:

FAA and EASA use the wording "appreciable effect on weight and balance" as one of the criteria to distinguish between minor and major modification (Part 21).
But I fail to find any definition of "appreciable effect"!? I found a definition of "negligible" effect on weight, but "negligible" is on the other end of the scale... What is not "negligible" is not necessarily "appreciable".

So can anyone point to a definition when it comes to "appreciable effect on weight"? I expected to find some percentages as for "negligible"...

3 replies: All unread, jump to last
User currently offlineRaventech From United States of America, joined Aug 2012, 131 posts, RR: 0
Reply 1, posted (3 years 3 days ago) and read 7274 times:

I don't think there is one because if they set a number and an incident results because it should have been done but FARs indicated it was not necessary then they are partially liable. Instead they used those terms to let the person performing the maintenance/alteration make the determination based on their best judgement (and thus solely on the hook). From what I picked up at A+P school is simply if you can't say beyond a reasonable doubt that is was negligible/not appreciable then recalculate/re-weight it. (If anyone knows different would also like to hear so).

If you haven't come across it yet, a good guide for determining major/minor alteration designation (FAA jurisdiction Aircraft) is FAR 43 Appendix A.

User currently offlineStarlionblue From Greenland, joined Feb 2004, 17654 posts, RR: 65
Reply 2, posted (3 years 2 days 22 hours ago) and read 7242 times:

It sounds like one of those catch-all phrases that regulators so love. If they regulated specifically, someone made a change within the limits, and then something went wrong due to the change...

"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineshiny From Germany, joined May 2012, 33 posts, RR: 0
Reply 3, posted (3 years 2 days 21 hours ago) and read 7223 times:

They can be more specific without any liability as often done - there are ACs, GMs, AMCs, etc., etc.
Just some kind of a direction would have been good as such is certainly known.

Top Of Page
Forum Index

Reply To This Topic "Appreciable Effect On Weight And Balance"
No username? Sign up now!

Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)

Similar topics:More similar topics...
Weight And Balance On LD-3 Capable Aircraft posted Thu Jan 20 2005 03:11:17 by Flybyguy
Weight And Balance On Airbus posted Mon Jan 20 2003 01:26:06 by Pat
WN 738 Weight And Balance Question posted Tue Apr 10 2012 20:01:41 by Swafa
DL4094 - Improper Weight And Balance? posted Thu Oct 27 2011 04:22:24 by theflcowboy
BA PHX-LHR: Weight And Balance? Config? posted Sun Aug 28 2011 14:39:06 by itsasmallworld
Weight And Balance Measurements posted Fri May 20 2011 02:51:59 by SAAFNAV
RJ Weight And Balance Question posted Mon Sep 21 2009 12:03:38 by Mcg
767ER Weight And Balance posted Sun Mar 8 2009 22:40:40 by RSW88
Cessna Stationair Etc. Weight And Balance Issues? posted Thu Jan 3 2008 13:19:27 by TupolevTu154
Weight And Balance posted Thu Jun 16 2005 21:41:29 by Corsair2

Sponsor Message:
Printer friendly format