H175 Aberdeen

[helicrazi]

What's going on in Aberdeen today?

[lavgrg]

Somebody named their EC175 "Dawn".
Everyone woke to the first crack of Dawn......

[industry insider]

Poor Dawn, no more than eighty matey.

[helicrazi]

Dawn has a big crack

[bigglesbutler]

Dawn has a big crack
:} LMFAO :}:}:}:}

[industry insider]

Is Dawn's crack blue or yellow?

[rrekn]

Dawn is blue today...

[pc00165]

Any photos???

[industry insider]

Poor Dawn, she must be lonely, isn't she an only child with a blue crack?

[helicrazi]

Yellow dawn doesn't have any siblings, That's going to hurt.. at least blue dawn has big brothers

[rrekn]

https://cimg9.ibsrv.net/gimg/pprune.org-vbulletin/1594x287/dawn_d0070c63fe15e810b7f7ddce77de0d091f3344a2.jpg
Dawn's Crack

[helicrazi]

Dawn just needs a good buffin', that'll sort her out

[helicrazi]

Exclusive: NHV Cancel All Flights Over Helicopter Safety Concerns After Crack Found (https://www.oilandgaspeople.com/news/18862/exclusive-nhv-cancel-all-flights-over-helicopter-safety-concerns-after-crack-found/)

Oil and Gas People has learned that NHV has today grounded all of its helicopter fleet cancelling flights across the North Sea.

NHV confirmed they have chosen to cancel all flights after a major crack was found on one of the Aberdeen based 175’s in the horizontal stabilator. The helicopter in question was not operated by NHV.

A source told Oil and Gas People that the crack stems the length from leading edge to near the trailing edge of the stabilator.

A flight speed restriction was put in place by the aircraft manufacturer Airbus but NHV decided instead to cancel all flights and wait for the release of a safety bulletin that will be released this afternoon.

Another source offshore advised us that people due to crew change tomorrow with NHV have been advised of a delay in their travel plans.

Oil and Gas People has reached out to Airbus the manufaturer of the helicopter for comment and is waiting on statements. We will update this article as they come through.

If you have any information contact [email protected] in confidence.


https://cimg7.ibsrv.net/gimg/pprune.org-vbulletin/2000x1333/reuse_newsimage_1_nhv_h175_helicopter_febf572f28816e36e4e708 6fbd676498da273ac9.png

[industry insider]

Looking at Dawn's crack, I think she has been having vibratory action around her rear end. I am surprised that her doctor wouldn't have been humming to her and giving her some warning that she needed some attention.

[EESDL]

HUMS - all depends on what you want to look for ;-)
The weight of the side ‘plates’ at each end of stab did surprise me......

[Helicopterfixerman]

I may be wrong, but I understand the stabiliser is an approved work platform for maintenance.........

[gulliBell]

Stuff these modern fragile plastic fantastic whirlybirds, bring back some real iron like ye ol' 212 for crew change!

[Twist & Shout]

“We don’t know why it cracked, but if vne is 80kts, it won’t happen again”

probably



”we are happy to bet your life”



again

[pants on fire...]

80 Knots you say? Bring back the Whirlwind...

[wrench1]

In my limited knowledge, I believe every helicopter horizontal stabilizer, or tailboom for that matter, has gone through a cracking phase at some time. And sometimes multiple times when the first repair simply moves the crack to a different location.

[helicrazi]

But there's cracking and then there's shearing off...

[EESDL]

So who will Hairbrush blame this time?
Badcrock or the OEM’s inability to understand what they have designed?

[BTC8183]

Some yellow ones flying today, certainly at more than 80kts!

[industry insider]

Anyone have a copy of the SB?

[cattletruck]

I reckon the crack started around that last rivet and speed evenly and rapidly in both directions parallel to the flex of the stabiliser. Perhaps a manufacturing fault caused in the drilling of the rivet hole in the stabiliser, the rivet overstressed the join, or just a faulty bit of aluminium sheet.

At least the crack of dawn was witnessed.

[EESDL]

I’m guessing the yellow ones had already acted on earlier ASB No. 05A030 involving Dawn and an Endoscope?

TIPi latest:
“Reason for last revision:
The purpose of revision 1 is to cancel the instructions of this ALERT SERVICE BULLETIN for helicopters on which ASB No. 05A030 has been embodied”

probably explains the exodus from Blue to Yellow

[rrekn]

80kt Speed Restriction is cancelled by implementation of a 10hr endoscopic (boroscope for the rest of the world) inspection of the whole stabiliser spar.

I tend to agree with Mitchaa, if Dawn's crack propagated that quickly to not be seen the previous day, 10 hrs may be too long.

Unless of course it was caused by 'other than flight loads'.

[Accidental Pilot]

ad.easa.europa.eu/ad/2019-0148-E

[Droop Snoot]

I tend to agree with Mitchaa, if Dawn's crack propagated that quickly to not be seen the previous day, 10 hrs may be too long.


Presumably the new inspection is being carried out much closer to the initiation point, and at a higher resolution than the one previously in place, therefore a reduction in interval might be acceptable. However, it would be interesting to know the basis of how the new and previous inspection intervals were established.

[212man]

80kt Speed Restriction is cancelled by implementation of a 10hr endoscopic (boroscope for the rest of the world) inspection of the whole stabiliser spar

an endoscope is used for internal examinations of bodies!

[skadi]

an endoscope is used for internal examinations of bodies!

Nope, boroskope has fixed tube with optical lenses, endoscope could be flexibel with fiber optic or fixed tube. The generic term for these devices is endoscope.

skadi

[skadi]

Deleted text

[John Eacott]

Exclusive: New Images of Damaged Airbus H175 Helicopter Emerge (https://www.oilandgaspeople.com/news/18871/exclusive-new-images-of-damaged-airbus-h175-helicopter-emerge/)


https://cimg1.ibsrv.net/gimg/pprune.org-vbulletin/800x454/reuse_newsimage_1_img_2984_babcock_mission_critical_services _offshore_ltd_airbus_h175_g_mcsf_l_310e72e5034ffa00e645c8913 f89fff34c85cd17.jpg


Oil and Gas People has been sent further images of the damaged H175 helicopter that resulted in North Sea operators grounding all similar aircraft. Babcock, CHC and NHV who fly the H175 acted to ground them despite Airbus only advising on a flight speed restriction.

This statement was issued by Airbus yesterday:

"Airbus Helicopters confirms it has issued a service bulletin to H175 operators calling for a temporary reduction of the maximum allowable speed of the helicopter."

"This follows the detection of a structural damage during routine inspections of the horizontal stabilizer on a customer helicopter."

"This initial service bulletin will be followed shortly by another one calling for fleet-wide inspections of the affected part. As is standard practice, these precautionary measures will be followed up by EASA-mandated airworthiness directives. We are in direct contact with our customers to minimise the impact on their operations."

https://cimg0.ibsrv.net/gimg/pprune.org-vbulletin/620x829/babcock_20airbus_20h175_20damage_2147c056e56bbded2f0c60e65d6 98c85a33d11a1.png

The images show significant damage and Oil and Gas People would like to congratulate the operators for taking the decision to ground the helicopters despite Airbus only issuing a speed restriction.


https://cimg4.ibsrv.net/gimg/pprune.org-vbulletin/620x829/babcock_20airbus_20h175_20crack_b3d9d541fe6b3fb7257545205754 b8fdc3a470fb.png

Published in Oil Industry News (https://www.pprune.org/justify=https://www.oilandgaspeople.com/news/5-oil-industry-news) on Friday, 21 June 2019

[The Bartender]

Nope, boroskope has fixed tube with optical lenses, endoscope could be flexibel with fiber optic or fixed tube. The generic term for these devices is endoscope.

skadi

Call it what you want to, but endoscopes are for doctors, and borescopes are for mechanics.