1d. 52-D-6907_Engineering Change Order_21 Sheets.pdf
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- Heavy Weight Fairlead Beams - FA481926Q0002
- Solicitation number
- FA481926Q0002
About this file
This is an Engineering Order (ECO 20100002) dated July 16, 2010, for modifications to the Arresting Gear Fairlead Beam 3-Sheaves (Drawing 52-D-6907), used on BAK-12 and MAAS arresting systems. The order addresses compliance with UFC 3-260-01 (May 2008 edition) and implements five primary design changes across all USAF fairlead beams per WRALC/ENGS Job #2010-01.
The required modifications include: increasing the top plate (Detail -2) thickness to 0.5 inches; adding and welding 12 gussets (Detail -19) between each tube-stake; drilling inspection holes in the top plate directly over anchor rod locations; beveling the edges of the center plate (Detail -4) that contact the top plate; and redesigning the hand hole cover assembly (Details -20 through -23). The engineering order provides detailed technical drawings for all affected components and includes a material support table specifying required quantities of ASTM A36 hot-rolled steel plate for Details -18 through -23. Additional drawings support manufacturing and clarity for Details -5, -6, -13, and various views. The document contains comprehensive dimensional specifications and welding requirements for implementation by contractors manufacturing these components.
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Text version
ENGINEERING ORDER
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DATE. 20 I (1(1716 PAGE 1 OF 21 PAGES
5 NEXT ASSY
52-W-2295
AHRESI l:\G GEAR FAIHLEAD BEAM 3-SIIL\\ ES
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BAK-12 AND MAAS (ARRESTIKG SYSTEMS)
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20. DESCRIPTION OF CHANGES/REMARKS
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ECO TO ADDRESS THE FOLLOWING: 3-9.1.1 of UFC 3-260-01 (ref May 2008 edition) jDAr!:
120100716
DATE
20100716
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16. CHANGE CHECKED BY SYMBOL
PER WRALC/ENGS JOB# 2010-01, ALL USAF FAIRLEAD BEAMS SHALL INCORPORATE THE FOLLOWING CHANGES:
A. THE FAIRLEAD BEAM TOP PLATE (DETAIL -2) THICKNESS SHALL BE INCREASED TO .5-INCHES, DAT!:
DATE
20100716
DATE
DATE
B. ADDITION OF AND WELDING OF GUSSETS (12 TOTAL), SEE DETAIL -19 WITHIN THIS ECO, BETWEEN EACH 'TUBE-STAKE' (SEE DETAIL -8 ON SHEET 3 <
OF 52-D-6907 DRAWING),
C. HOLES SHALL BE DRILLED IN DETAIL -2, AT LOCATIONS DIRECTLY OVER DETAIL -17 ONCE ASSEMBLED, TO ALLOW ANCHOR ROD INSPECTION
ONCE FIELDED,
D. BEVEL EDGES OF CENTER-PLATE (DETAIL -4) THAT CONTACT TOP PLATE (DETAIL -2), AND
E. REDEISGN OF HAND HOLE COVER ASSEMBLY (SEE DETAIL -20 THROUGH -23).
THE FOLLOWING PAGES OF THIS ECO ADDRESSES THE ABOVE REQUIREMENTS AS WELL AS PROVIDES:
i. DRAWINGS OF ALL NEW AND REQUIRED CHANGES (DETAIL -2, -4, -18, 19, -20, -21, -22, -23 ANO ASSEMBLY DRAWINGS AS NECESSARY), AND -th···A90¼TIONAL···DRAWING··-FOR· MANUFACTIJR4NGANOG-bARH·¥-fSEE··E>ETAH"-5,-�.-1-3-ANO-\IARIOOS-VI-EWS·t-------------------t---
AF IMT 3925, 20030819, V1 REPLACES AF FORM 2600. 19940701, WHICH IS OBSOLETE
FairleadBeamDrawings
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