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© The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2025-0618; AD 2026-05-07 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

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REQUIREMENTS BULLETIN 767-57A0148

ALERT ALERT RADIUS 25 - RADIUS FILLER "L" (5X7) RADIUS FILLER "I" ' FILLER "K" 250

FILLER J FILLER 'O' 5 RADIUS 2 € 10 RADIUS FILLER "N" FWD FILLER "P" 2 5 10 RADIUS 'FILLER "M" C-C 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 one side of the airplane.

Step Task Name Identification Qty More Data Locate FITTING, UNDER- 111T4020U9 1

WING LONGERON, LH Locate FITTING, INTERNAL 1

BATHTUB Locate SHIM, LAMINATED BACS40R018B022F 1 (a) Shim A.

Locate SHIM, LAMINATED BACS40R021C037F 1 (a) Shim B.

Locate SHIM, LAMINATED BACS40R014C022F 1 (a) Shim C.

Locate SHIM, LAMINATED BACS40R025C063F 2 (a) (p) Shim D.

Locate RADIUS FILLER 16 (b) Drill HOLE (c)(d) Drill and ream to final hole size.

Refer to the fastener code table.

FIGURE 23: LEFT SIDE UNDERWING LONGERON FITTING P/N 111T4020U9 - TENSION BOLT AND

INTERNAL BATHTUB FITTING - INSTALLATION (SHEET 3 OF 8) Original Issue: October 10, 2024 767-57A0148 RB Export Controlled ECCN: 9E991 See page 1 for details 361 of 416

More DataQtyIdentificationNameTaskStep

(c)(d)(e) Drill and ream to final hole size. Refer to the fastener code table.

41-HOLEDrill4

(f)16-RADIUS FILLERRemove / Keep5 Shim A.1BACS40R018B022FSHIM, LAMINATEDRemove / Keep Shim B.1BACS40R021C037FSHIM, LAMINATEDRemove / Keep Shim C.1BACS40R014C022FSHIM, LAMINATEDRemove / Keep

(p) Shim D.2BACS40R025C063FSHIM, LAMINATEDRemove / Keep -1-FITTING, INTERNAL

BATHTUB Remove / Keep -1111T4020U9FITTING, UNDER-

WING LONGERON, LH Remove / Keep Clean and deburr all structure.

--STRUCTUREClean/Deburr

(g)1111T4020U9FITTING, UNDER-

WING LONGERON, LH Install (New)6

(h)12-RADIUS FILLERInstall (Kept)7

(i) Refer to the fastener code table.

34-FASTENERInstall (New)8

(j) Shim A.1BACS40R018B022FSHIM, LAMINATEDInstall (Kept)9

(j) Shim B.1BACS40R020C032FSHIM, LAMINATEDInstall (Kept)

(j) Shim C.1BACS40R014C022FSHIM, LAMINATEDInstall (Kept)

(j)1-FITTING, INTERNAL

BATHTUB Install (Kept) -1-TEMPORARY TEN-

SION BOLT Install (New)

(k)4-RADIUS FILLERInstall (Kept)10

(l) Refer to the fastener code table.

8-FASTENERInstall (New)11 FIGURE 23: LEFT SIDE UNDERWING LONGERON FITTING P/N 111T4020U9 - TENSION BOLT AND

INTERNAL BATHTUB FITTING - INSTALLATION (SHEET 4 OF 8) Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 10, 2024 767-57A0148 RB 362 of 416 REQUIREMENTS BULLETIN 767-57A0148

ALERTALERT

More DataQtyIdentificationNameTaskStep -1-TEMPORARY TEN-

SION BOLT Remove12 Ream and deburr the tension bolt hole to final hole size.

Refer to the fastener code table.

1-HOLEReam

(l) Refer to the fastener code table.

1-FASTENERInstall (New)

(m)(p) Shim D.2BACS40R025C063FSHIM, LAMINATEDInstall (Kept)13

(l) Refer to the fastener code table.

3-FASTENERInstall (New)14

(n)5 OzBMS 5-45SEALANTApply15

(o)5 OzBMS 5-95SEALANTApply16

(a) Delaminate and taper shim as required to get a 0.005 inch maximum gap.

(b) If a radius filler was removed from locations "A" through "P". Locate in the recorded orientation from removal.

(c) Keep a minimum of 1.7D edge margin at all fastener locations on the underwing longeron fitting.

(d) For existing fastener that is nominal, first, or second oversized, install the same type and size fastener if open hole HFEC confirms crack-free condition.

(e) Oversizing to second oversize fastener requires high interference cold-working. Cold work the hole in accordance with 767-400ER SRM 51-40-09.

(f) If a radius filler was removed from locations "A" through "P". Record the orientation of the radius filler at each location for re-installation.

(g) Apply BMS 5-95 faying surface seal to the mating surface of the lower panel and the underwing longeron fitting. Refer to SOPM 20-50-19 as an accepted procedure.

(h) If a radius filler was removed from locations "C" through "L", "O", and "P". Locate in the recorded orientation from removal.

(i) Install the fasteners wet with BMS 5-45 to partially install the underwing longeron fitting. Refer to SOPM 20-50-19, and 767-400ER SRM 51-40-02 as accepted procedures.

Do not install fasteners common to the internal bathtub fitting or the three forward fasteners that are common to the underwing longeron fitting.

(j) Apply BMS 5-45 faying surface seal. Refer to SOPM 20-50-19 as an accepted procedure.

(k) If a radius filler was removed from locations "A", "B", "M", and "N". Install in the recorded orientation.

(l) Install fasteners wet with BMS 5-45. Refer to SOPM 20-50-19 as an accepted procedure.

(m) Apply BMS 5-95 faying surface seal to each shim. Refer to SOPM 20-50-19 as an accepted procedure.

FIGURE 23: LEFT SIDE UNDERWING LONGERON FITTING P/N 111T4020U9 - TENSION BOLT AND

INTERNAL BATHTUB FITTING - INSTALLATION (SHEET 5 OF 8) Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 10, 2024 767-57A0148 RB 363 of 416 REQUIREMENTS BULLETIN 767-57A0148

ALERTALERT

More DataQtyIdentificationNameTaskStep

(n) Apply cap seal to wing tank fasteners internally with BMS 5-45. Refer to 767 AMM 28-11-00 as an accepted procedure.

(o) Apply BMS 5-95 to fillet seal around the perimeter of the underwing longeron fitting. Refer to SOPM 20- 50-19 as an accepted procedure.

(p) One or both Shim D may not have been previously installed. Install the necessary number of shim(s) based on the findings during fitting removal. If shim(s) must be added at a location, use the appropriate number of shim(s) as necessary.

The codes shown below agree with the letter shown in the upper left corner of the fastener symbols in the figure.

A number in the lower right corner gives the grip length of the fastener. The QTY numbers shown below are the number of fasteners necessary for this figure.

More DataHole DiaQtyIdentificationNameCode First oversize fastener.0.2621-0.264128BACB30NX8K( )XBOLT, PROTRUDING HD A --28BACC30BH8COLLAR Second oversize fastener.0.2777-0.279728BACB30NX8K( )YBOLT, PROTRUDING HD --28BACC30AC8COLLAR First oversize fastener.0.3246-0.32661BACB30NX10K( )XBOLT, PROTRUDING HD B --1BACC30BH10COLLAR Second oversize fastener.0.3402-0.34221BACB30NX10K( )YBOLT, PROTRUDING HD --1BACC30AC10COLLAR FIGURE 23: LEFT SIDE UNDERWING LONGERON FITTING P/N 111T4020U9 - TENSION BOLT AND

INTERNAL BATHTUB FITTING - INSTALLATION (SHEET 6 OF 8) Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 10, 2024 767-57A0148 RB 364 of 416 REQUIREMENTS BULLETIN 767-57A0148

ALERTALERT

More DataHole DiaQtyIdentificationNameCode First oversize fastener.0.3871-0.38914BACB30NX12K( )XBOLT, PROTRUDING HD C --4BACC30BH12COLLAR Second oversize fastener.0.4027-0.40474BACB30NX12K( )YBOLT, PROTRUDING HD --4BACC30AC12COLLAR First oversize fastener.0.4496-0.45165BACB30NX14K( )XBOLTD --5BACC30BH14COLLAR Second oversize fastener.0.4652-0.46725BACB30NX14K( )YBOLT --5BACC30AC14COLLAR First oversize fastener.0.3871-0.38912BACB30YK12K( )XBOLTE --2BACC30CP12CCOLLAR Second oversize fastener.0.4027-0.40472BACB30YK12K( )YBOLT --2BACC30CP12CYCOLLAR First oversize fastener.0.6401-0.64113BACB30MR10A26XBOLTF Under the bolt head.-3BACW10BP101CDWASHER, PLAIN Under the nut.-3BACW10BP101DPWASHER, PLAIN Torque nut to 1843 to 1957 inch lbs.

-3BACN11Z10CDNUT Second oversize fastener.0.6557-0.65673BACB30MR10A26YBOLT Under the bolt head.-3BACW10BP102CDWASHER, PLAIN Under the nut.-3BACW10BP102DPWASHER, PLAIN Torque nut to 1843 to 1957 inch lbs.

-3BACN11Z10CDNUT First oversize fastener.0.6401-0.64111BACB30US10K( )XBOLTG Self-aligning washer set.

Under the head.

-1BACW10CA101CVWASHER Self-aligning washer set.

Under the head.

-1BACW10CA12CCWASHER, SELF- ALIGN Under the nut. One additional can be used as required, for grip length adjustment.

-1BACW10BP101DPWASHER, PLAIN Torque nut to 2231 to 2369 inch lbs.

-1BACN10HR10CDNUT FIGURE 23: LEFT SIDE UNDERWING LONGERON FITTING P/N 111T4020U9 - TENSION BOLT AND

INTERNAL BATHTUB FITTING - INSTALLATION (SHEET 7 OF 8) Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 10, 2024 767-57A0148 RB 365 of 416 REQUIREMENTS BULLETIN 767-57A0148

ALERTALERT

More DataHole DiaQtyIdentificationNameCode First oversize fastener.0.3276-0.32861BACB30US5K( )XBOLT, 12 PT HEADH Under the bolt head.-1BACW10BP51CDWASHER, PLAIN Under the nut.-1BACW10BP51DPWASHER, PLAIN Torque nut to 243 to 258 inch lbs.

-1BACN10HR5CDNUT FIGURE 23: LEFT SIDE UNDERWING LONGERON FITTING P/N 111T4020U9 - TENSION BOLT AND

INTERNAL BATHTUB FITTING - INSTALLATION (SHEET 8 OF 8) Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 10, 2024 767-57A0148 RB 366 of 416 REQUIREMENTS BULLETIN 767-57A0148

ALERTALERT

Page 7OCROpen in PDF

REQUIREMENTS BULLETIN 767-57A0148

ALERT ALERT This Figure applies only to: Group 2.

STA FUSELAGE 783.04

FRONT SPAR SKIN UPPER DRAG

SPLICE ANGLE

UNDERWING LOWER DRAG

LONGERON SPLICE ANGLE

FITTING

UNDERWING LONGERON FITTING 3054670 FIGURE 24: RIGHT SIDE UNDERWING LONGERON FITTING P/N 111T4020U10 - TENSION BOLT AND

INTERNAL BATHTUB FITTING - INSTALLATION (SHEET 1 OF 8) Original Issue: October 10, 2024 Export Controlled ECCN: 9E991 767-57A0148 RB See page 1 for details 367 of 416

Page 8OCROpen in PDF

REQUIREMENTS BULLETIN 767-57A0148

ALERT ALERT

SEAL RETAINER FRONT INTERNAL 15 SPAR

B BATHTUB FITTING B LONGERON FITTING UNDERWING 16616) SHIM 'C" XE 9 SHIM "A" 39 912 STA

776.21 + SHIM "B" ( RADIUS FILLER 'B' 7 LOCATIONS UNDERWING LONGERON FITTING FWD 3 LOCATIONS 1 1 26 A-A RADIUS

FILLER 'A'

FWD RADIUS FILLER "B" 34 LOCATIONS RADIUS (10) FILLER "C"

RADIUS A F FILLER "D" SHIM "D" (2 LOCATIONS) (5 13) 5 10 RADIUS FILLER "A" 251 RADIUS FILLER "E" RADIUS FILLER "F" 2 RADIUS FILLER "H" RADIUS 3054671 FILLER "G" B-B FIGURE 24: RIGHT SIDE UNDERWING LONGERON FITTING P/N 111T4020U10 - TENSION BOLT AND

INTERNAL BATHTUB FITTING - INSTALLATION (SHEET 2 OF 8) Original Issue: October 10, 2024 767-57A0148 RB Export Controlled ECCN: 9E991 See page 1 for details 368 of 416

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 one side of the airplane.

More DataQtyIdentificationNameTaskStep -1111T4020U10FITTING, UNDER-

WING LONGERON, RH Locate1 -1-FITTING, INTERNAL

BATHTUB Locate

(a) Shim A.1BACS40R018B022FSHIM, LAMINATEDLocate

(a) Shim B.1BACS40R021C037FSHIM, LAMINATEDLocate

(a) Shim C.1BACS40R014C022FSHIM, LAMINATEDLocate

(a)(p) Shim D.2BACS40R025C063FSHIM, LAMINATEDLocate

(b)16-RADIUS FILLERLocate2

(c)(d) Drill and ream to final hole size.

Refer to the fastener code table.

3-HOLEDrill3 FIGURE 24: RIGHT SIDE UNDERWING LONGERON FITTING P/N 111T4020U10 - TENSION BOLT AND

INTERNAL BATHTUB FITTING - INSTALLATION (SHEET 3 OF 8) Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 10, 2024 767-57A0148 RB 369 of 416 REQUIREMENTS BULLETIN 767-57A0148

ALERTALERT

More DataQtyIdentificationNameTaskStep

(c)(d)(e) Drill and ream to final hole size. Refer to the fastener code table.

41-HOLEDrill4

(f)16-RADIUS FILLERRemove / Keep5 Shim A.1BACS40R018B022FSHIM, LAMINATEDRemove / Keep Shim B.1BACS40R021C037FSHIM, LAMINATEDRemove / Keep Shim C.1BACS40R014C022FSHIM, LAMINATEDRemove / Keep

(p) Shim D.2BACS40R025C063FSHIM, LAMINATEDRemove / Keep -1-FITTING, INTERNAL

BATHTUB Remove / Keep -1111T4020U10FITTING, UNDER-

WING LONGERON, RH Remove / Keep Clean and deburr all structure.

--STRUCTUREClean/Deburr

(g)1111T4020U10FITTING, UNDER-

WING LONGERON, RH Install (New)6

(h)12-RADIUS FILLERInstall (Kept)7

(i) Refer to the fastener code table.

34-FASTENERInstall (New)8

(j) Shim A.1BACS40R018B022FSHIM, LAMINATEDInstall (Kept)9

(j) Shim B.1BACS40R020C032FSHIM, LAMINATEDInstall (Kept)

(j) Shim C.1BACS40R014C022FSHIM, LAMINATEDInstall (Kept)

(j)1-FITTING, INTERNAL

BATHTUB Install (Kept) -1-TEMPORARY TEN-

SION BOLT Install (New)

(k)4-RADIUS FILLERInstall (Kept)10

(l) Refer to the fastener code table.

8-FASTENERInstall (New)11 FIGURE 24: RIGHT SIDE UNDERWING LONGERON FITTING P/N 111T4020U10 - TENSION BOLT AND

INTERNAL BATHTUB FITTING - INSTALLATION (SHEET 4 OF 8) Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 10, 2024 767-57A0148 RB 370 of 416 REQUIREMENTS BULLETIN 767-57A0148

ALERTALERT

More DataQtyIdentificationNameTaskStep -1-TEMPORARY TEN-

SION BOLT Remove12 Ream and deburr the tension bolt hole to final hole size.

Refer to the fastener code table.

1-HOLEReam

(l) Refer to the fastener code table.

1-FASTENERInstall (New)

(m)(p) Shim D.2BACS40R025C063FSHIM, LAMINATEDInstall (Kept)13

(l) Refer to the fastener code table.

3-FASTENERInstall (New)14

(n)5 OzBMS 5-45SEALANTApply15

(o)5 OzBMS 5-95SEALANTApply16

(a) Delaminate and taper shim as required to get a 0.005 inch maximum gap.

(b) If a radius filler was removed from locations "A" through "P". Locate in the recorded orientation from removal.

(c) Keep a minimum of 1.7D edge margin at all fastener locations on the underwing longeron fitting.

(d) For existing fastener that is nominal, first, or second oversized, install the same type and size fastener if open hole HFEC confirms crack-free condition.

(e) Oversizing to second oversize fastener requires high interference cold-working. Cold work the hole in accordance with 767-400ER SRM 51-40-09.

(f) If a radius filler was removed from locations "A" through "P". Record the orientation of the radius filler at each location for re-installation.

(g) Apply BMS 5-95 faying surface seal to the mating surface of the lower panel and the underwing longeron fitting. Refer to SOPM 20-50-19 as an accepted procedure.

(h) If a radius filler was removed from locations "C" through "L", "O", and "P". Locate in the recorded orientation from removal.

(i) Install the fasteners wet with BMS 5-45 to partially install the underwing longeron fitting. Refer to SOPM 20-50-19, and 767-400ER SRM 51-40-02 as accepted procedures.

Do not install fasteners common to the internal bathtub fitting or the three forward fasteners that are common to the underwing longeron fitting.

(j) Apply BMS 5-45 faying surface seal. Refer to SOPM 20-50-19 as an accepted procedure.

(k) If a radius filler was removed from locations "A", "B", "M", and "N". Install in the recorded orientation.

(l) Install fasteners wet with BMS 5-45. Refer to SOPM 20-50-19 as an accepted procedure.

(m) Apply BMS 5-95 faying surface seal to each shim. Refer to SOPM 20-50-19 as an accepted procedure.

FIGURE 24: RIGHT SIDE UNDERWING LONGERON FITTING P/N 111T4020U10 - TENSION BOLT AND

INTERNAL BATHTUB FITTING - INSTALLATION (SHEET 5 OF 8) Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 10, 2024 767-57A0148 RB 371 of 416 REQUIREMENTS BULLETIN 767-57A0148

ALERTALERT

More DataQtyIdentificationNameTaskStep

(n) Apply cap seal to wing tank fasteners internally with BMS 5-45. Refer to 767 AMM 28-11-00 as an accepted procedure.

(o) Apply BMS 5-95 to fillet seal around the perimeter of the underwing longeron fitting. Refer to SOPM 20- 50-19 as an accepted procedure.

(p) One or both Shim D may not have been previously installed. Install the necessary number of shim(s) based on the findings during fitting removal. If shim(s) must be added at a location, use the appropriate number of shim(s) as necessary.

The codes shown below agree with the letter shown in the upper left corner of the fastener symbols in the figure.

A number in the lower right corner gives the grip length of the fastener. The QTY numbers shown below are the number of fasteners necessary for this figure.

More DataHole DiaQtyIdentificationNameCode First oversize fastener.0.2621-0.264128BACB30NX8K( )XBOLT, PROTRUDING HD A --28BACC30BH8COLLAR Second oversize fastener.0.2777-0.279728BACB30NX8K( )YBOLT, PROTRUDING HD --28BACC30AC8COLLAR First oversize fastener.0.3246-0.32661BACB30NX10K( )XBOLT, PROTRUDING HD B --1BACC30BH10COLLAR Second oversize fastener.0.3402-0.34221BACB30NX10K( )YBOLT, PROTRUDING HD --1BACC30AC10COLLAR FIGURE 24: RIGHT SIDE UNDERWING LONGERON FITTING P/N 111T4020U10 - TENSION BOLT AND

INTERNAL BATHTUB FITTING - INSTALLATION (SHEET 6 OF 8) Export Controlled ECCN: 9E991 See page 1 for details Original Issue: October 10, 2024 767-57A0148 RB 372 of 416 REQUIREMENTS BULLETIN 767-57A0148

ALERTALERT

Pages 13–24 of 56