Jump to content



Recommended Posts

Another potential (Boeing) CVM application?



Fatigue damage can occur locally, in small areas or structural design details, or globally, in widespread areas. Multiple-site damage is widespread damage that occurs in a large structural element such as a single rivet line of a lap splice joining two large skin panels. Widespread damage can also occur in multiple elements such as adjacent frames or stringers. Multiple-site damage and multiple-element damage cracks are typically too small initially to be reliably detected with normal inspection methods. Without intervention, these cracks will grow, and eventually compromise the structural integrity of the airplane. This condition is known as WFD. It is associated with general degradation of large areas of structure with similar structural details and stress levels. As an airplane ages, WFD will likely occur, and will certainly occur if the airplane is operated long enough without any intervention.

Costs of Compliance

The FAA estimates that this AD, if adopted as proposed, would affect 1,187 airplanes of U.S. registry. The FAA estimates the following costs to comply with this proposed AD:

Link to comment
Share on other sites

  • Replies 572
  • Created
  • Last Reply

Top Posters In This Topic

is this beneficial, Daz?


Boeing is edging towards a landmark order from Delta Air Lines for up to 100 of its 737 MAX 10 jets, a model it is battling in separate talks to get approved before year end rule changes, people familiar with the matter said.


Link to comment
Share on other sites

Hi All,

This presentation is from 2018, so relatively old, but I like it in that it provides some insight into the number of applications (Delta specific).


As the company have said, they are focusing on a couple of specific applications initially, but ultimately there is no shortage of potential for CVM.





Link to comment
Share on other sites

Hi All,

Unfortunately, I don’t know the specific numbers, but thought this was if interest:

“Aside from the A330neo, all of Delta’s internationally configured aircraft still sport Gogo-branded Intelsat Ku-powered onboard Internet.”


Again, I don’t have specific numbers, but assume that ALL internationally configured Delta aircraft would be a significant number.

Any one have an idea of the number?





Link to comment
Share on other sites

Fleet Type Current Fleet Average Age (Years)
Boeing 717-200 54 20.3
Boeing 737-800 77 20.1
Boeing 737-900ER 132 5.1
Boeing 757-200 100 24.2
Boeing 757-300 16 18.6
Boeing 767-300ER 40 25.1
Boeing 767-400ER 21 20.8
Airbus A220-100 41 2.0
Airbus A220-300 9 0.8
Airbus A319-100 57 19.6
Airbus A320-200 56 25.7
Airbus A321-200 123 2.9
Airbus A330-200 11 16.5
Airbus A330-300 31 12.7
Airbus A330-900neo 11 1.3
Airbus A350-900 18 3.1
Total Fleet 797


Link to comment
Share on other sites

then subtract the Boeings?? (probably not that simple !)

What planes does Delta use for international flights?
  • Airbus A220-100 (221)
  • Airbus A220-300 (223)
  • Airbus A319-100 (319)
  • Airbus A320-200 (320)
  • Airbus A321-200 (321)
  • Airbus A330-200.
  • Airbus A330-300.
  • Airbus A330-900neo (339)
Link to comment
Share on other sites

Hi All,

Was think recently that it’s interesting that SMN have advised that currently the plan is to focus if the WiFi & APB applications, but relatively recently (May 2020) expressed interest in having CVM approved for Bear Strap inspections:


Request To Allow Alternate Inspection Procedure

Structural Monitoring Systems PLC (SMS) requested that the FAA allow the use of SMS comparative vacuum monitoring (CVM) structural monitoring sensors (and a CVM nondestructive testing procedure (NDT)) as an alternative to the HFEC inspections of the bear strap.

Regardless of the reasoning, it again highlights the long list of potential applications waiting in the wings (pardon the pun 🤣)




Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...