Bald Eagle Aviation

[51fixer]

Lynn, been using a Mac since the early 90s.
Probably send this to Roush to repair as a backup.
Both cores are the same size side to side and top to bottom.
Basically two cores stacked bac to back.

[Lynn Allen]

Lynn, been using a Mac since the early 90s.
Probably send this to Roush to repair as a backup.
Both cores are the same size side to side and top to bottom.
Basically two cores stacked bac to back.

True, but I don't want to light up your Blackberry like last time....

[51fixer]

T-6 Wing Attach AD in process-

Green fluorescence Penetrant applied-

We're incorporating the NATA AMOC so future inspections will be reduced in the area needed to be inspected every 200 hrs.

[Jack Cook]

timing is everything..........
That horrible crash was 6 years ago today

[airnutz]

Along with having to constantly try to remember Port and Starboard.

A short story I came up with in Navy bootcamp to help me remember...A Viking tale of adventure:
Eric the RED LEFT PORT.
The End

[Django]

I just remember that port and left are the same number of letters.

[51fixer]

Left and Port are similar in being small words.
Starboard is the larger word as is Right.

Just don't start with spanner vs whatever it really is.

[bdk]

Does the NATA AMOC allow ultrasonic, or only dye penetrant?

[51fixer]

Does the NATA AMOC allow ultrasonic, or only dye penetrant?

The dye penetrant method is stated in the AD.
The NATA AMOC adds Eddy Current as a NDT method that can be used and changes the time interval on various areas around the angles.
The AD specifies the entire angle specified should be inspected every 200 hrs.
The NATA AMOC changes that to 1000 hrs except for the 1st 7" of the lower inboard angle on the removable stress door and the 1st 11" of the lower forward outboard angle on the outboard wing. This is on both sides, L and R, and this area remains at 200 hr intervals of inspection by the specified dye penetrant method or eddy current.

[bdk]

Thanks Rich!

[mustanglover]

Does the NATA AMOC allow ultrasonic, or only dye penetrant?

The dye penetrant method is stated in the AD.
The NATA AMOC adds Eddy Current as a NDT method that can be used and changes the time interval on various areas around the angles.
The AD specifies the entire angle specified should be inspected every 200 hrs.
The NATA AMOC changes that to 1000 hrs except for the 1st 7" of the lower inboard angle on the removable stress door and the 1st 11" of the lower forward outboard angle on the outboard wing. This is on both sides, L and R, and this area remains at 200 hr intervals of inspection by the specified dye penetrant method or eddy current.

If we can ever get the LA-ACO (Aircraft Certification Office) and Washington, DC of their collective butts, we will PMA to produce all of those angles with a plan for an AMOC that will get rid of the repetitive inspections.

[51fixer]

Does the NATA AMOC allow ultrasonic, or only dye penetrant?

The dye penetrant method is stated in the AD.
The NATA AMOC adds Eddy Current as a NDT method that can be used and changes the time interval on various areas around the angles.
The AD specifies the entire angle specified should be inspected every 200 hrs.
The NATA AMOC changes that to 1000 hrs except for the 1st 7" of the lower inboard angle on the removable stress door and the 1st 11" of the lower forward outboard angle on the outboard wing. This is on both sides, L and R, and this area remains at 200 hr intervals of inspection by the specified dye penetrant method or eddy current.

If we can ever get the LA-ACO (Aircraft Certification Office) and Washington, DC of their collective butts, we will PMA to produce all of those angles with a plan for an AMOC that will get rid of the repetitive inspections.

There is a lot of BS to this.
All situations are not the same when it comes to past usage and Environments that it has lived in.
Not all angles need to be changed and probably even inspected at the intervals of 200 hrs. That is why the NATA shared efforts to study the loads and strains imposed on the wing structure. Based on this data they determined the areas under the most load are the fwd 7" of the inboard angle on the stress door and the fwd 11" of the adjacent angle on the Outer wing. The AMOC from NATA requires the close inspection of those areas at the 200 hr times, not even the entire angle of those 2 pieces. This where the crack was on the doomed six that lost a wing.
Changing attach angles just because with no other reason is not cost effective and could induce some poor quality repair work. I've seen angles replaced that were done in a scary way. Almost as unsafe as the corroded piece that was replaced. NAA used 20+ steel screws on addition to rivets to attach the angle to the stress door. A 3/16" rivet is roughly 1/3 as strong in shear as an NAS 221 type screw. Yet I found a replaced angle with all rivets installed. All the screws had rivets in their place.
I'll admit that having new angles is a benefit if you need to change one. I've installed NOS ones from Lance. I just don't know if an AMOC requiring changing angles is the best answer unless you already need to make the change.

[51fixer]

Just about finished with the AD inspection.
The Dye Penetrant method specified for this requires the use of a Blacklight.

The Penetrant is a very thin green liquid that will wick into cracks and very small spaces. It is sprayed from an aerosol can.

There is a dwell time for it to sit in place and then it is wiped off. A developer liquid in aerosol can form is then sprayed on the same surface. This dries into a white powder in 5-15 minutes. Kinda looks like deodorant.


Then it is lights out and time to see your shoelaces glow.



It is amazing how this gets on everything and you don't know it until you accidently shine the light on it.
My shirt-

[51fixer]

Bolts are all in, pulled it outside and ran it.
I believe Jim will take it to Indy this weekend.
Watch out Trey, you been warned.

[51fixer]

Now back to the P-51.
It is a PITA but I got the radiator back in on Fri.
This is when I'm in my better watch out and don't talk to me at the moment moments.

We over came and it is in place.

The old seals around the opening and exit of the radiator interface really was poor. Probably only sealed 50-70%
of the areas. That is a lot of hot air. Each corner had an opening.

I installed new seals.

Old

New

Hopefully it'll be an improvement.
Next will be clamps, some safety wire, coolant and engine runs.