Supersessions proposed for federal, industry and military standards are coordinated throughout the company as supplements issued by Boeing. 2 PURPOSE AND AUTHORITY FOR THE D-590 SUPERSESSION-LIST Engineering drawings use standard part callouts derived from federal, military and industry standards, as well as Boeing Company part standards. identified by (*) in the data) are now in D-590-SUP-LIST-MISC. The miscellaneous data previously contained in the Preface (old conversions for grip length, etc.
The SSL data is separate from this Preface in D-590-SUPERSESSION-LIST. The superseding parts listed in the SSL are not alternate parts they are to be used in place of the obsolete part on current drawings, and as new callouts for new designs. The SSL is not to be confused with a program substitution drawing which authorizes alternate parts, materials and processes for production shortages. BCA Spares 2, airlines and Maintenance facilities are exempted per Section 5. The intent of the SSL is to allow the replacement of old standard part callouts without drawing changes 1 (see Section 4 for NOTES). 4 Boeing Proprietary Basic Control ******* PSDS GENERATED ******* BOEING D-590 PART STANDARDS D-590-SUP-LIST-PREFACE D-590 SUPERSESSION LIST FOR STANDARD PARTS, PREFACE D-590-SUP-LIST-PREFACE REV N PAGE 2 1 SCOPE The Supersession List (SSL) applies to Boeing design and manufacturing, including subcontractors, at the division level when invoked by a division by the use of its acronym (e.g., BCA) on the standard. 4 FIGURE 3–1 PRODUCTION RULES FOR SUPERSESSION CLASSES (SEE Section 5 FOR EXCEPTIONS FOR AIRLINES/CUSTOMERS AND SPARES). 3 FIGURE 2–2 DEFINITIONS OF SSL HEADINGS. 6 LIST OF FIGURES Figure Title Page FIGURE 2–1 DIVISION DESIGNATORS. 6 5.1 Superseding Parts Optional for Airlines and Maintenance Facilities.
5 3.6 Class V (The old part is an unacceptable risk). 5 3.5 Class IV (The new part is not interchangeable with the old part in all applications). 5 3.4 Class III (The old part remains active). 5 3.3 Class IIA (The old part is not interchangeable with the new part). 5 3.2 Class II (The old part is not interchangeable with the new part). 3 2 PURPOSE AND AUTHORITY FOR THE D-590 SUPERSESSION-LIST. BOEING D-590 PART STANDARDS D-590-SUP-LIST-PREFACE D-590 SUPERSESSION LIST FOR STANDARD PARTS, PREFACE REV N 2 D-590-SUP-LIST-PREFACE PAGE 1 OF 6 TABLE OF CONTENTS Section Title SCOPE.
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