Go Back  PPRuNe Forums > Aircrew Forums > Rotorheads
Reload this Page >

AAIB(H) UK October 2023

Wikiposts
Search
Rotorheads A haven for helicopter professionals to discuss the things that affect them

AAIB(H) UK October 2023

Thread Tools
 
Search this Thread
 
Old 12th Oct 2023, 20:44
  #1 (permalink)  
Thread Starter
 
Join Date: Mar 2015
Location: Harwich UK
Age: 65
Posts: 66
Received 6 Likes on 5 Posts
AAIB(H) UK October 2023

Hoist hook falls off AW169 during pre-start, a possible victim of ‘procedural drift’ - link (it’s in inverted commas only because I have never heard of the term)

Record onlies include loss of a cowling on a 355F2 in flight because of distraction during the preflight, a Rotorway Exec feeling uncomfortable about a fuel divert to Duxford because of a busy air show and finally running out a couple of miles short of the next alternative, and fixed-wing G-SNOG only because I’d love to make radio calls with that reg.
Luther Sebastian is offline  
The following users liked this post:
Old 13th Oct 2023, 06:53
  #2 (permalink)  
 
Join Date: Apr 2000
Location: EGDC
Posts: 10,332
Received 623 Likes on 271 Posts
The old military term would be 'switch-pigs' when you hit a button you weren't supposed to or hit the right button at the wrong time - very embarrassing to pickle off the winch hook..........
crab@SAAvn.co.uk is offline  
The following users liked this post:
Old 13th Oct 2023, 07:39
  #3 (permalink)  
 
Join Date: Oct 1999
Location: Den Haag
Age: 57
Posts: 6,264
Received 336 Likes on 188 Posts
Originally Posted by [email protected]
The old military term would be 'switch-pigs' when you hit a button you weren't supposed to or hit the right button at the wrong time - very embarrassing to pickle off the winch hook..........
Not quite the same. Procedural drift is when SOP start to be amended by crews over time - either deliberately or otherwise - resulting in potential errors. e,g :

The crew could not explain their exact sequence of cut switch guard raises, why the hoist power was applied out of sequence or why the hoist operations pre-start procedure in the company checklist was not followed in order
212man is offline  
Old 13th Oct 2023, 09:50
  #4 (permalink)  
 
Join Date: Dec 2005
Location: England
Posts: 1,459
Received 34 Likes on 20 Posts
Originally Posted by Luther Sebastian
Hoist hook falls off AW169 during pre-start, a possible victim of ‘procedural drift’ - link (it’s in inverted commas only because I have never heard of the term)

Record onlies include loss of a cowling on a 355F2 in flight because of distraction during the preflight, a Rotorway Exec feeling uncomfortable about a fuel divert to Duxford because of a busy air show and finally running out a couple of miles short of the next alternative, and fixed-wing G-SNOG only because I’d love to make radio calls with that reg.

G-SNOG,

Reminds me of the arrival of Willie Carson the jockey at the old Doncaster airport in G-WILI.

"Where do you want me to park?"

Linda in ops, "Next to G-PUSY but not too close."
ericferret is offline  
The following 5 users liked this post by ericferret:
Old 13th Oct 2023, 13:21
  #5 (permalink)  
 
Join Date: Oct 1999
Location: Den Haag
Age: 57
Posts: 6,264
Received 336 Likes on 188 Posts
fixed-wing G-SNOG
​​​​​​​I see the type is a actually a Kiss 400!
212man is offline  
The following 3 users liked this post by 212man:
Old 13th Oct 2023, 16:08
  #6 (permalink)  
 
Join Date: Apr 2000
Location: EGDC
Posts: 10,332
Received 623 Likes on 271 Posts
Not quite the same. Procedural drift is when SOP start to be amended by crews over time - either deliberately or otherwise - resulting in potential errors. e,g :
yes, when you are so used to doing something every sortie, like a hoist check, you can over-anticipate the other persons actions since it is an exchange of verbal confirmations and requests combined with a set of physical actions. The you get the switch pigs because one person is mixing the words and actions - usually accidentally.

​​​​​​​I can't imagine they actually do the hoist check from a check list.
crab@SAAvn.co.uk is offline  
Old 13th Oct 2023, 16:44
  #7 (permalink)  
 
Join Date: Oct 1999
Location: Den Haag
Age: 57
Posts: 6,264
Received 336 Likes on 188 Posts
Originally Posted by [email protected]
yes, when you are so used to doing something every sortie, like a hoist check, you can over-anticipate the other persons actions since it is an exchange of verbal confirmations and requests combined with a set of physical actions. The you get the switch pigs because one person is mixing the words and actions - usually accidentally.

I can't imagine they actually do the hoist check from a check list.
There was interesting case, not the same but with parallels to procedural drift, with BA38. BA had taken the emergency shutdown checks and split them Left and Right onto placards on the pilots' yokes, to show their respective actions. Unfortunately, if done out of sequence, which they were, some actions were no longer possible (I think it was the fuel valves being closed that didn't work). Seemed like a good idea at the time, but subsequently proved it was best to leave it as Boeing had published it!
212man is offline  
Old 13th Oct 2023, 18:02
  #8 (permalink)  
 
Join Date: Apr 2001
Location: Norfolk
Posts: 495
Likes: 0
Received 3 Likes on 3 Posts
Not the first time an interrupted inspection has resulted in a sub-optimal situation https://www.gov.uk/aaib-reports/aero...6-january-1993
As I recall the tail assembly was displayed with JC's comment "this might hurt" Mightygem might confirm?
Droopy is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.