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  1. USACompositeGuy

    JT8D - Pratt and Whitney Service Bulletin Supplemental Document No 5411

    Len, are you finding an NPRM for the SB? I don't find any ADs or NPRMs for this item.
  2. USACompositeGuy

    JT8D - Pratt and Whitney Service Bulletin Supplemental Document No 5411

    I'm working on an old JT8D and have a copy of SB 5411, however there is a Supplemental Document referenced "Supplemental Document No 5411." Which I'm having a hard time finding. Does anyone have a copy?
  3. USACompositeGuy

    Service Bulletin 727-55-0092

    This is an old aircraft that I'm working on, does anyone have a copy of Boeing Service Bulletin 727-55-0092? Thanks
  4. USACompositeGuy

    Freeze Plugs in 6AL-4V Titanium

    Does anyone have any references for installing freeze plugs in Titanium? The SRMs cover installation of freeze plugs and bushings in aluminum however I can’t find anything that provides this same level of guidance in titanium. I have reviewed this thread...
  5. USACompositeGuy

    FCBS for DC10-30

    If your company owns an aircraft or if your client owns an aircraft they will need to purchase this document, however the rumor is that the next revision of the SRM (due in march) will have this included. Are you putting together a plan for compliance or just repairing a component?
  6. USACompositeGuy

    A356 Casting Conductivity

    I am trying to find a source for the %ICAS value for the conductivity of A356 Cast Al. I am doing an on-wing inspection to check if an overheat condition changed the temper of a casting. It is A356-T6, but I can't find this value in any of the traditional documents. I can find hardness from...
  7. USACompositeGuy

    Rockwell Hardness B Values for A356-T6 Casting

    I have an A356-T6 casting that was repair welded and stress relived per AMS 2771. The AMS spec sends you to the material spec which provides Brinell values for process verification coupons. I only have access to a Rockwell B hardness machine and can’t find a conversion factor from Brinell to...
  8. USACompositeGuy

    Effects of UV on epoxy composite laminates

    I would like to know if anyone has any recommended literature for the short term effects of UV exposure on a carbon/epoxy laminate. By short term I mean a few days and exposure would be to the sun on an unpainted laminate.
  9. USACompositeGuy

    How to analyze the stress caused by a Freeze plug

    I have a fitting that has oversized fastener holes. The upper and lower portions of the fitting (flanges) are approx. .180 thick and have ample edge margin to support a freeze plug from a standard tear out strength vs fastener shear (Each flange can support higher load than the fastener shear...
  10. USACompositeGuy

    Post Weld Heat Treat/Stress Relief Requirements

    Does anyone have any recommendations for books on the topic of post weld heat treatment/stress relief? I am having a hard time finding some general guidelines as to when PWHT is required and what the effects of not doing it actually are. I am analyzing weld repairs on aircraft engines...
  11. USACompositeGuy

    Post Weld Stress Relief For CRES

    I am currently working a repair of an elongated fastener hole on the flange of a Duct assembly. The duct material is 0.063" thick 321 Annealed CRES per MIL-S-6721, Comp T1. The repair is to fusion weld the surfaces using AMS 5689 filler. I am unsure if it is possible to not perform a post...
  12. USACompositeGuy

    Composite sandwich, material type and laod calculations

    My company, Carbon Fiber Solutions, is a consulting firm that specializes in composite engineering. We have designed components for kit planes (and other applications) and are currently working on an all composite certificated airplane. If you are serious about building a composite airplane...
  13. USACompositeGuy

    TR Sleeves -RB211-535E4-Rohr Drawings.

    I have the SRM and the engine manual which show only the ply lay-up and material of the skin, not the doublers. The reason I need the DWG is so that I can see the ply lay-up of the doubler at the slider fitting. I will be taper sanding the damage outside of the fitting area to ensure...
  14. USACompositeGuy

    TR Sleeves -RB211-535E4-Rohr Drawings.

    I am working on a composite repair for the TR sleeve on an RB211-535E4 engine. The actual TR sleeves are made by Rohr. I am in need of a DWG for the TR sleeve. The damaged area is located on the outer skin in the lower corner of the part at the slider fitting. The area has a graphite doubler...
  15. USACompositeGuy

    Accreditation-How Important is it?

    I too have worked with an engineer in the aviation industry that had a mechanical engineering degree from a non-ABET school. I must say that if he is a good representative for the non-ABET schools I will always check before I hire anyone. I like to give people the benefit of the doubt and I...
  16. USACompositeGuy

    2 part epoxy for aircraft components

    Are you working on interior or exterior components? I would guess that you are working interior and that is why you are concerned with smoke? I am sure that I could give you some guidance but I need a little more information on what you are working on. www.carbonfibersolutions.com
  17. USACompositeGuy

    HoneyComb Panel Closeouts

    I think you need to be more specific in your question. What exactly are you talking about when you say "closeouts?" What is your application and what kind of bending loads will you see? www.carbonfibersolutions.com
  18. USACompositeGuy

    Aerospace specifications for carbon fibers

    The BMS spec 9-17 is titled CARBON REINFORCEMENTS, HIGH STRENGTH AND INTERMEDIATE MODULUS FIBERS. This would mean that the fibers used in the pultruded tubes conform to BMS 9-17 prior to being pultruded. The only Boeing spec I know of that relates to pultrusion is BAC5597, CARBON FIBER/EPOXY...
  19. USACompositeGuy

    What's your favorite composites processing method?

    CompositesGuy, I would like to know more about your business, I think that I may be able to help you. Send me an email: Honeycutt@carbonfibersolutions.com. As for the original question, I think we can all agree that composites are very process critical and the “best” procedure greatly...
  20. USACompositeGuy

    British Aerospace BAER 3068

    I also posted this in the Composite section, but I think it is as or more relevant here. Does anyone know a good source to find the BAER specs? I am specifically in current need of BAER 3068. I know this is a 350 degree Prepreg Carbon, 5-H Satin Fabric, But I need to know the specifics. In...

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