Where AD compliance is difficult...

[NeverBlue]

Wait a second.

Are you actually saying that if a doubler was installed to stop/prevent cracking you have to be able to still inspect under the doubler for cracking?

Wtf?

What if there is some...do you install another doubler. ?.again...??

So, in a way, I am an E, 

enough said...

[NeverBlue]

I know who you are...you said you failed an stc inspection because of noise in the headsets as soon as you turned things on..."instant fail" you said...they then "tweaked" it and fixed the problem.

Tweaked it you say!

I remember...they simply disconnected a headset that had it's mic curled inside the earcup.


You can't "tweak" away EMI genius

[PilotDAR]

Are you actually saying that if a doubler was installed to stop/prevent cracking you have to be able to still inspect under the doubler for cracking?

No, I am not actually saying this, the FAA is in their AD (or should be with greater clarity - as suggested in my first post).

Perhaps the doubler does not stop cracking, but merely conceals it! Maybe is was poorly designed.

'Ever removed a piece of structure to find that what was concealed underneath was alarming, and had gone by un noticed for too long?

[photofly]

'Ever removed a piece of structure to find that what was concealed underneath was alarming, and had gone by un noticed for too long?

Not in an airplane, but in a building: on renovating, I found the centre of the first floor of my house was being supported by an Acrow prop that had been bricked up in the basement.

[PilotDAR]

You can't "tweak" away EMI genius

is true, I cannot tweak away EMI. I do not design, nor fix. I just witness certification testing.

However the genius people who designed the system which produced the EMI, understood what they needed to do to cause it to cease, and when they invited me to retest the aircraft, it was free of EMI. I presume they did some genius level tweaking - far beyond my understanding, and the problem was solved. Nothing whatever to do with microphones.

[NeverBlue]

So, in a way, I am an E,

Yup...all makes sense now...

..."tweaked" it...

[PilotDAR]

..."tweaked" it...

Yup - tweaked it! Then defined the changed configuration, performed the required testing, documented that, and issued the required approval for release to service.

A lot of design refinement involves "tweaking" to determine the final required configuration, which is followed by a more robust final change if called for (some times it's just a setting with an adjustment range - like a compass correction). Sometimes I've used foam door seal tape, or " 'Hundred mile a hour tape" to tweak a design, then followed up with a final compliant installation with the required robustness - which was approved.

I once was witnessing helicopter external boom testing, and a oscillation of one boom became intolerable during the flying. After a half hour of considered thinking about the problem, I tweaked the design with 5 feet of foam door seal tape, and reflew it. Problem solved, and Transport Canada flight test passed that way. Permanent metal strip put on for STC approval. Happy Transport Canada and happy client!

[NeverBlue]

Look...I don't care anymore...

Your handle is PilotDAR...sounds like an announcement

You can't tell me if moving the conductor from the alternator to the Avionics bus in a C150 from the right side to the left side of the engine ( or visa versa ) is a major mod or not
...and you think you're an AME licensed E kind of because you do inspections...

And you're worried I might be mentoring someone?

Go away...

[photofly]

I don't think PilotDAR does do inspections, nor claim to.