Welcome Guest
HeliTorque
  
User Control Panel

Security Code: : Security Code
Type Security Code Here: :
 
Register Here
Lost Password?

Online Stats:
Visitors: 23
Members: 0
Total: 23

Membership:
New Today: 0
New Yesterday: 0
Registering: 0
Members: 6662
Latest: chrisw

Most Ever Online
Visitors: 447
Members: 10
Total: 457


HeliTorque :: View topic - ***Important - Please read - B206 AD***
Forum FAQ
Forum FAQ
Search
Search
Memberlist
Memberlist
Usergroups
Usergroups
Profile
Profile
Contact Manager
Contact Manager
Log in
Log in
Log in to check your private messages
Log in to check your private messages
HeliTorque Forum Index » Flight Dynamics

Post new topic   Reply to topic All times are GMT
***Important - Please read - B206 AD*** Goto page 1, 2  Next
View previous topic :: View next topic  
Author Message
Thomas Coupling
H Addict
H Addict


Offline
Joined: Jul 26, 2004
Posts: 490
Location: How do I know...The map is on the back seat!


uk.gif

PostPosted: Tue Jun 13, 2006 7:02 am    Post subject: ***Important - Please read - B206 AD*** Reply with quote

We've all heard and read about the very sad accident involving the b206 pipeline patrol cab which lost it's vertical fin, killing the crew.

I received the official CAA document only yesterday resultant from the AAIB investigation. It states that during the next 100-hour inspection, the vertical fin must be inspected for loose securing bolts.

Oh yeah - Inspect it NOW dear people!! Shocked

I spoke to my engineer over the phone (Thanks Mr Massey) and suggested that it would be prudent to do the inspection ASAP as we've just recently had a 100 check.

As I was obviously concerned, he asked me to use a 7/16th ring spanner and see if I could turn any of the bolts in question.....

Guess what? All four were loose Shocked

For crying out loud - please check the bolts NOW!!
_________________
TC - Pilot to the Stars.


GPS - No fix available Sad
Back to top
View user's profile Send private message
James T Lowe
Moderator
Moderator


Offline
Joined: Jul 27, 2004
Posts: 2575
Location: Leicester


uk.gif

PostPosted: Tue Jun 13, 2006 7:36 am    Post subject: Reply with quote

Shocked

Do you know if those bolts are checked on any scheduled inspection?
_________________
J.
Back to top
View user's profile Send private message Visit poster's website
Thomas Coupling
H Addict
H Addict


Offline
Joined: Jul 26, 2004
Posts: 490
Location: How do I know...The map is on the back seat!


uk.gif

PostPosted: Tue Jun 13, 2006 8:28 am    Post subject: Reply with quote

Not that I know of...

The machine had an annual back in February - It certainly wasn't picked up then, even though the Canadian AD had been issued earlier than February.

Scary stuff Sad
_________________
TC - Pilot to the Stars.


GPS - No fix available Sad
Back to top
View user's profile Send private message
James T Lowe
Moderator
Moderator


Offline
Joined: Jul 27, 2004
Posts: 2575
Location: Leicester


uk.gif

PostPosted: Tue Jun 13, 2006 9:08 am    Post subject: Reply with quote

Not that I know anything about engineeringy type things, but it strikes me as a little odd that checking of these bolts isn't part of either a pilot check, or an engineering check.

I'd guess from your original post, that it's not too difficult to get to them?
_________________
J.
Back to top
View user's profile Send private message Visit poster's website
Thomas Coupling
H Addict
H Addict


Offline
Joined: Jul 26, 2004
Posts: 490
Location: How do I know...The map is on the back seat!


uk.gif

PostPosted: Tue Jun 13, 2006 11:04 am    Post subject: Reply with quote

Oh very easy In fact....

But where do you stop checking? Have you seen the amount of nuts, bolts & screws Shocked A visual check is always prudent and some screws are designed (Along the tail boom) so that movement can be identified by a visual check. Not these however. They are torqued bolts on roller type sleaves.
_________________
TC - Pilot to the Stars.


GPS - No fix available Sad
Back to top
View user's profile Send private message
James T Lowe
Moderator
Moderator


Offline
Joined: Jul 27, 2004
Posts: 2575
Location: Leicester


uk.gif

PostPosted: Tue Jun 13, 2006 3:04 pm    Post subject: Reply with quote

Well, quite. So perhaps not Check A; but maybe part of wider, less frequent, engineery type checks. I don't suppose it needs to be as frequent as 50 hours. Like I said - I don't know about such things.

I guess it'll be part of everyone's checks now.
_________________
J.
Back to top
View user's profile Send private message Visit poster's website
Bell417
Starting to 'Torque
Starting to 'Torque


Offline
Joined: Mar 18, 2006
Posts: 11
Location: Ft. Worth, TX


usa.gif

PostPosted: Wed Jun 14, 2006 1:10 am    Post subject: Reply with quote

I have been taught to check them on every preflight...allow me to elaborate, our bolt heads have torque-seal applied..if the bolts have come loose, the torque-seal will have given it away through visual inspection...
_________________
The comments and postings on this site by me are of my own and do not
neccessarily represent Bell Helicopter's position, strategies or
opinions.
Back to top
View user's profile Send private message
Thomas Coupling
H Addict
H Addict


Offline
Joined: Jul 26, 2004
Posts: 490
Location: How do I know...The map is on the back seat!


uk.gif

PostPosted: Wed Jun 14, 2006 6:23 am    Post subject: Reply with quote

Good for you...

Ours don't.

This AD refers to the NUT on the inside becoming loose - which wouldn't necessarily turn the bolt head being held by torque-paint. And of course can't be seen Wink

see; http://www.caa.co.uk/docs/536/LTO2897.pdf
_________________
TC - Pilot to the Stars.


GPS - No fix available Sad
Back to top
View user's profile Send private message
Thomas Coupling
H Addict
H Addict


Offline
Joined: Jul 26, 2004
Posts: 490
Location: How do I know...The map is on the back seat!


uk.gif

PostPosted: Wed Jun 14, 2006 5:56 pm    Post subject: Reply with quote

As an update....

I've spoken with the CAA this afternoon who agree that the 100 hour/next inspection as suggested in the AD should read "Before next flight" and hopefully will be changing it ASAP.

A B206 fleet in the UK fly on average only 150 hours per year.
A private owner might not get this checked therefore within the next 11 months!
_________________
TC - Pilot to the Stars.


GPS - No fix available Sad


Last edited by Thomas Coupling on Thu Jun 15, 2006 7:47 am; edited 1 time in total
Back to top
View user's profile Send private message
Flying Foxy
H Addict
H Addict


Offline
Joined: Oct 12, 2004
Posts: 1003
Location: EGSY (Sheffield) Once a city with an airport :-(


uk.gif

PostPosted: Wed Jun 14, 2006 7:39 pm    Post subject: Reply with quote

TC said:
Quote:
They are torqued bolts on roller type sleeves.


Is there any chance you could elaborate (with diags?) on this 'roller-type sleeve' fixing please TC - I'd like to have a picture in my mind..

Cheers,

FF

_________________
PPL(H)
Schweizer 300
Back to top
View user's profile Send private message Send e-mail MSN Messenger
biggruntbravo
Starting to 'Torque
Starting to 'Torque


Offline
Joined: Aug 03, 2005
Posts: 32


usa.gif

PostPosted: Thu Jun 15, 2006 12:08 am    Post subject: Reply with quote

is this more of a common occurance? i am in the u.s. army flight school (rotary wing) and that is all we use is a bell jetranger 206 for primary (vfr) and intruments. this is the first i have heard of this occurance happening to one of those since i have been around these helicopters. you are correct by checking the vertical fin during pre-flight, as well as the tail rotor spike, i will as my instructor tomorrow if he has ever heard of such an occurance but i was wondering if this was more than just one in recent years/months? last accident i have heard of with B206 is compressor pretty much disintergrated or bird strikes through the windscreen.
Back to top
View user's profile Send private message
Thomas Coupling
H Addict
H Addict


Offline
Joined: Jul 26, 2004
Posts: 490
Location: How do I know...The map is on the back seat!


uk.gif

PostPosted: Thu Jun 15, 2006 7:41 am    Post subject: Reply with quote

Flying Foxy wrote:
TC said:
Quote:
They are torqued bolts on roller type sleeves.


Is there any chance you could elaborate (with diags?) on this 'roller-type sleeve' fixing please TC - I'd like to have a picture in my mind..

Cheers,

FF


I'd love to help FF but can't lay my hands on any... See the link to the CAA site in the posting above - that has a diagram of sorts - tho not much cop.
_________________
TC - Pilot to the Stars.


GPS - No fix available Sad
Back to top
View user's profile Send private message
James T Lowe
Moderator
Moderator


Offline
Joined: Jul 27, 2004
Posts: 2575
Location: Leicester


uk.gif

PostPosted: Thu Jun 15, 2006 7:55 am    Post subject: Reply with quote

BGB,

This AD results from an accident in Scotland in December. The Helitorque thread here has some details.

The AAIB report has not yet been published, however, the AAIB issued a Special Bulletin in March following their initial investigations. And I'd guess that as the investigation continues, more critical information has come to light and the CAA have issued the AD.

I think this particular "issue" is rare; indeed, the CAA's document that TC links to includes this:

Quote:
A review of the service history of the aircraft type has not revealed evidence of multiple occurrences of cracking in this area. Of the three known instances of cracking in the world fleet, this is the first recorded fatal accident.

_________________
J.
Back to top
View user's profile Send private message Visit poster's website
Flying Foxy
H Addict
H Addict


Offline
Joined: Oct 12, 2004
Posts: 1003
Location: EGSY (Sheffield) Once a city with an airport :-(


uk.gif

PostPosted: Thu Jun 15, 2006 11:52 am    Post subject: Reply with quote

Ok TC, (I've always wanted to put that!!!)

I was talking with a Maintenance Man this morning and asked him about the situation.

(This recounting of info is not to be taken as legitimate or to be actioned on or anything - it was a description by one guy to another)

There are two types of tail fin or mounting. (Not sure which - we were just chatting, but the .pdf suggests a later type of fin being a one-piece assembly where the earlier one is a composite?). The bolts through the fin into the mounting pass through sleeves which prevent the fin and tailboom being crushed when torque-ing the nuts. The mount is the frame upon which the t/r gearbox sits as shown in the .pdf.
Now I can visualise it - the tension is between the bolt head and its nut via the frame.

FF

_________________
PPL(H)
Schweizer 300
Back to top
View user's profile Send private message Send e-mail MSN Messenger
James T Lowe
Moderator
Moderator


Offline
Joined: Jul 27, 2004
Posts: 2575
Location: Leicester


uk.gif

PostPosted: Thu Jun 15, 2006 2:20 pm    Post subject: Reply with quote

Flying Foxy wrote:
Ok TC


Laughing Cool
_________________
J.
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    HeliTorque Forum Index » Flight Dynamics All times are GMT

 
Goto page 1, 2  Next
Page 1 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Sponsors


Billund Air Center

Visit HeliTorque!