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Recent content by ERAU82

  1. ERAU82

    permanent ink felt-tip pens [Sharpies, etc], any color, EXCEPT BLACK! (quiz: why not black)

    Sharpies are forbidden on any high strength steel components. The acid in the ink will cause an initiation site for stress corrosion cracking (SCC). I believe Boeing issued a memo years ago.
  2. ERAU82

    Old material designation?

    UA10N is a common French Aluminum Nickel Bronze alloy used for aerospace bushings. It's typically expressed as CuAl10Ni5Fe3 - try LeBronze alloys, had no issues getting this material in bar or tube stock. Spent many years working in a US division of a French OEM and material alternatives...
  3. ERAU82

    A380 MLG bogies ?

    Landing on the forward or aft tires on a bogie configuration is to alleviate loading to the strut and to lessen the pitch moment of the aircraft. Most aircraft land aft tires first but there are several besides the A380 that lands forward tires first - the 767-400 for example.
  4. ERAU82

    Lubrication and Installation of Elastomeric Seals for Fluid Service

    Will, I've used a gelled lube product from AFS - they make MS-352B for use with Skydrol and AFS-682 for use with 'red' oils, both mineral based (5606) and the newer synthetics. They are great for lubrication of seals and also for holding stubborn split back-up seals in-place during...
  5. ERAU82

    What is Boeing "SMAL"?

    CarloAero I've used Boeing SMAL's when a part is not available and my customer (air carrier) will ground an aircraft. Your customer (air carrier) must request the SMAL from Boeing stating that their vendor has capability to manufacture the part and failure to supply the part will ground a...
  6. ERAU82

    Wheel Bearing Failure

    The main cause of wheel bearing failure is loss of torque on the axle nut due to improper torquing procedures. As the nut is tightened, the wheel assembly is rotated by another maintenance technician. This seats the bearings properly. The other important aspect is to follow the torquing...
  7. ERAU82

    Spin Wheels Before Landing

    Air Force studies back in the 60's and 70's determined that only 10% of tire wear is a result of landing 'non-spinning' wheels on jet aircraft. Yes, the ends of the runway looks like it contains a lot of rubber, but it is a thin layer. The majority of tire wear occurs at the gate due to the...
  8. ERAU82

    DN Paint Color vs. Fed. Std. 595 Color

    Thanks drawoh. I'll see what I can find. ERAU82
  9. ERAU82

    DN Paint Color vs. Fed. Std. 595 Color

    I have a specification calling for color DN 3493 (Gray Type 1). I believe that it is equivalent to Fed. Std. 595 color 36081 which is a dark gray. Is there a comparison chart available that lists DN vs. Fed. Std. 595 numbers? Regards, ERAU82
  10. ERAU82

    In DC-10 SBs what does Group I thru IV indicate?

    Boeing (ex-Douglas) S/B's list the affected aircraft in Groups, usually due the changes in a/c configuration. The modification steps are then listed by Group. S/B's are for aircraft modifications, usually for spares there is a paragraph in the S/B that denotes what needs to be accomplished or...
  11. ERAU82

    Roll Threading Existing Cut Threads for Fatique Improvement

    Not sure if this is the right Forum. I have an commercial aircraft MLG axle that due to corrosion was machined 1/16" undersized. The OEM approved the repair but reduced the life limit due to fatigue issues with the newly cut undersized threads. The OEM did state that the original life limit...
  12. ERAU82

    Stainless Steel

    Checking ASM's Worldwide Guide to Equivalent Irons and Steels, 3rd Ed., shows that X17CrNi16-2 falls into the UNS S43100, AISI 431, and EN10088-3 categories. Check with your suppliers to see if they can supply their S43100/AISI 431 material to meet your specific requirements of X17CrNi16-2...
  13. ERAU82

    English-French Aeronautical-Technical Dictionary

    Wil Taylor, I use a book developed by Aerospatiale used during the early Airbus days - it translates French aerospace words and phrases into English, German, and Spanish. It is very helpful and the phrases are very common to everyday aircraft maintenance. It is over 800 pages. The book -...
  14. ERAU82

    Electroless Nickel Plating or Coating?

    bmoorthy, AMS2404 is the spec. for electroless Ni. There are variations to straight electroless Ni, low phosporus (AMS2405) and electroless Nickel-Boron (AMS2399). What is the application that you are looking to use this on?
  15. ERAU82

    Equivalent Cadmium Plating Specification

    Does the part have any threads? My experience with landing gear parts in this heat treat range is to use LHE Cadmium plating (Low Embrittlement). It is used mainly on parts heat treated 220-300 Ksi and threaded parts treated to 180-220 Ksi. The spec is AMS2401 or MIL-STD-870. If you are...
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