Supplier Quality (SQ) from Northrop Grumman Aeronautics Systems (NGAS) and the Strategic Space Systems Division (SSSD) and the Strategic Deterrent Systems (SDS) of the Space Sector (SP) maintain an "Approved Special Processor List" (ASPL) for all NGAS, SSSD and SDS programs. This list can be sorted by Supplier Name, Supplier Number, Country, or Process Specifications and Process Categories.

How to use the ASPL and the enclosed information is bulleted below:

  • Users must initially select the specific ASPL they are searching within (i.e. Aeronautics Systems, Strategic Space Systems, or Strategic Deterrent Systems). If you are unsure which ASPL to search please verify with your NG Buyer.
  • All specifications can be selected by selecting Specification (1st button), Category (2nd button), which includes 8 categories and Space Systems Division specifications, or F35 specifications under Program (3rd button).
  • At the Top RH side of the site is a “Helpful Links” button that has 8 links. See Below for 5 specific ones.
    • First two links are to Boeing’s ‘D1-4426’ ASPL and Lockheed’s ‘QCS-001’ ASPL.
    • Third is a “Change Log” that shows when processors are added or removed, or when specifications are added or removed from the processors or the ASPL.
    • The 4th and 5th are listings of NDT technique approvals; by “Processor and by Part Number”.
For any questions, contact:

Warning:    Northrop Grumman process specifications contain technical data whose export is restricted by the Arms Export Act (Title 22, U.S.C., Sec 2751 et seq.) or the Export Administration Act (Title 50, U.S.C., App. 24001-240). Violation of these export laws are subject to severe criminal penalties.


RTI Advanced Forming Inc - NADCAP Approved
1701 W Main St
Washington, MO 63090 United States
Phone: 636-239-7816
Fax: 636-239-3214
Selected sector: AS

Process Description
Standard Practice for Liquid Penetrant Testing
Non-Destructive Testing
Type 1, Method A, Sensitivity Level 3, Form d

Procedure, Etching prior to Penetrant Inspection
Chemical Processing
Limited to titanium only

Heat Treatment of Titanium and Titanium Alloys
Heat Treat
Limited to stress relief only

Forming of Titanium and Titanium Alloys
Limited to TI-6AL-4V and 6V only

Cleaning and Descaling of Titanium and Titanium Alloys
Chemical Processing
Allowance to use TS100 in lieu of GSS 7015 for cleaning and descaling per RCI 117735. Limited to Methods 1, 3, and 5 only

Fluorescent Penetrant Inspection
Non-Destructive Testing
Type 1, Method A, Sensitivity Level 3, Form d