Boeing Alert Requirements Bulletin 757-53A0123 RB: No revision named, part 4 of 4, text

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Page 1OCROpen in PDF

REQUIREMENTS BULLETIN 757-53A0123

ALERT ALERT — S-13R

INTERCOSTAL STRAP

• SUPPORT FITTING

• SKIN

COVER PLATE

FRAME INNER CHORD

BEAR STRAP

FRAME WEB FRAME OUTER CHORD

INTERCOSTAL STRAP LOWER HINGE _LOWER HINGE

FITTING CENTERLINE

LOWER HINGE FLAP

INTERCOSTAL STRAP

• S-14R INBD (VIEW IN THE FORWARD DIRECTION) A-A OPEN-HOLE HFEC INSPECTION 3045726 FIGURE 23: RIGHT SIDE - FUSELAGE FRAME WEB AT STA 1640 LOWER HINGE FITTING - OPEN-HOLE HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION - LOCATION 9 (SHEET 2 OF 3) Original Issue: March 13, 2024 Export Controlled ECCN: 9E991 757-53A0123 RB See page 1 for details 173 of 178

Page 2Open in PDF

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for this figure.

More DataQtyIdentificationNameTaskStep

(a)1-FASTENERRemove / Keep1

(b)(c)(d)--FRAME WEBInspect2

(a) Refer to 757-200 SRM 51-40-02, 757-200CB SRM 51-40-02 or 757-300 SRM 51-40-02 as an accepted procedure.

(b) Do an open-hole HFEC inspection of the frame web for any crack in accordance with 757 NDT Manual PART 6, 51-00-04, 757 NDT Manual PART 6, 51-00-11 or 757 NDT Manual Part 6, 51-00-16.

(c) Insert the probe to a minimum depth of 0.30 inches to reach the entire thickness of the frame web, and to a maximum depth of 0.40 inches to avoid interfering with the nutplate.

(d) Do the open-hole inspection from the aft side of the frame through the external access door or the hinge opening.

FIGURE 23: RIGHT SIDE - FUSELAGE FRAME WEB AT STA 1640 LOWER HINGE FITTING - OPEN-HOLE HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION - LOCATION 9 (SHEET 3 OF 3) Export Controlled ECCN: 9E991 See page 1 for details Original Issue: March 13, 2024 757-53A0123 RB 174 of 178 REQUIREMENTS BULLETIN 757-53A0123

ALERTALERT

Page 3OCROpen in PDF

REQUIREMENTS BULLETIN 757-53A0123

ALERT ALERT STA STA 1640 1640 STA 1620 S-8R - S-9R S-10R S-11R LOWER S-13R HINGE

INTERCOSTAL S-14R- • CO S-16R FLOOR S-17R - - A or B S-18R FWD S-19R - (VIEW IN THE OUTBOARD DIRECTION) A Or B 3045727 FIGURE 24: RIGHT SIDE - FUSELAGE FRAME WEB AT STA 1640 ABOVE S-19R - SURFACE HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION - LOCATION 10 (SHEET 1 OF 4) Original Issue: March 13, 2024 Export Controlled ECCN: 9E991 757-53A0123 RB See page 1 for details 175 of 178

Page 4OCROpen in PDF

REQUIREMENTS BULLETIN 757-53A0123

ALERT ALERT

FLOOR BEAM S-18R

NUT SPACER PLATES

MAY BE DIFFERENT

FOR EACH AIRPLANE

CONFIGURATION FRAME OUTER CHORD

• FAILSAFE CHORD 1 S-19R FRAME INNER CHORD • BEAR STRAP

• SKIN

FRAME WEB S-20R INBD (VIEW IN THE FORWARD DIRECTION AT FRAME

WITHOUT FRAME SEGMENT REPLACEMENT REPAIR) A-A / SURFACE HFEC INSPECTION 3045728 FIGURE 24: RIGHT SIDE - FUSELAGE FRAME WEB AT STA 1640 ABOVE S-19R - SURFACE HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION - LOCATION 10 (SHEET 2 OF 4) Original Issue: March 13, 2024 Export Controlled ECCN: 9E991 757-53A0123 RB See page 1 for details 176 of 178

Page 5OCROpen in PDF

REQUIREMENTS BULLETIN 757-53A0123

ALERT ALERT

FLOOR BEAM

FRAME REPAIR ANGLE (NESTED S-18R

INSIDE INNER CHORD)

FRAME REPAIR

DOUBLER FRAME OUTER CHORD

NUT SPACER

PLATES MAY BE

DIFFERENT FOR FAILSAFE

EACH AIRPLANE CHORD

CONFIGURATION

FRAME TRIM LINE S-19R

FRAME INNER CHORD BEAR STRAP SKIN

FRAME WEB

FRAME REPAIR FILLER S-20R INBD (VIEW IN THE FORWARD DIRECTION AT FRAME WITH

FRAME SEGMENT REPLACEMENT REPAIR) B-B

SURFACE HFEC INSPECTION 3051222 FIGURE 24: RIGHT SIDE - FUSELAGE FRAME WEB AT STA 1640 ABOVE S-19R - SURFACE HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION - LOCATION 10 (SHEET 3 OF 4) Original Issue: March 13, 2024 Export Controlled ECCN: 9E991 757-53A0123 RB See page 1 for details 177 of 178

Page 6Open in PDF

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for this figure.

More DataQtyIdentificationNameTaskStep

(a)--FRAME WEBInspect1

(a) Do a surface HFEC inspection of the frame web around the fastener for any crack in accordance with 757 NDT Manual Part 6, 51-00-19.

FIGURE 24: RIGHT SIDE - FUSELAGE FRAME WEB AT STA 1640 ABOVE S-19R - SURFACE HIGH FREQUENCY EDDY CURRENT (HFEC) INSPECTION - LOCATION 10 (SHEET 4 OF 4) Export Controlled ECCN: 9E991 See page 1 for details Original Issue: March 13, 2024 757-53A0123 RB 178 of 178 REQUIREMENTS BULLETIN 757-53A0123