# Boeing Alert Requirements Bulletin 737-57A1358 RB: No revision named, part 2 of 2

- Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2026-2716; AD 2026-21-07 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Boeing Alert Requirements Bulletin 737-57A1358 RB](https://openairdocs.org/service-documents/boeing/737-57a1358-rb.md)
- Title as filed: 737-57A1358 RB -Part 2
- Pages: 30
- PDF: https://openairdocs.org/files/sha256/df/e9/dfe9369a34feb98fb45d171c1a2ecacd8a3deda10acff05eff5916872b27b773
- Page: https://openairdocs.org/service-documents/boeing/737-57a1358-rb/file/dfe9369a34fe

## Text

Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
MAIN TRACK
RIB ASSEMBLY
04€00
34€Đ00
ATTACH STRAP •
NBD
ENGINE FUEL SHUTOFF VALVE AÇCESS
PANEL IS SHOWN IN CLOSED POSITION
FORM-IN-PLACE GASKET
APPLICATION AREA
FORM-IN-PLACE GASKET AND  3089145
SEALANT APPLICATION AREA
FIGURE 4: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FORM-IN-PLACE (FIP)
GASKET REPLACEMENT
(SHEET 2 OF 5)
Original Issue: November 17, 2025
Export Controlled ECCN: 9E991  737-57A1358 RB
See page 1 for details  34 of 63

### Page 2

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)(b)--SEALANT (FORM-IN-
PLACE GASKET)
Remove1
(b)(c)--SEALANTRemove2
(b)(d)--SEALANTRemove3
(e)--CORROSION INHIBIT-
ING COMPOUND
Remove4
(f)(g)--SURFACEClean5
(h)(i)-BMS 5-45, CLASS B-
1/2 OR B-2
SEALANTApply6
(h)(j)-BMS 5-45, CLASS B-
1/2 OR B-2
SEALANTApply7
(k)(l)(m)-FREKOTE 710-NCPARTING AGENTApply8
(n)(o)-BMS 5-45, CLASS B-
1/2
SEALANT (FORM-IN-
PLACE GASKET)
Apply9
(p)(q)1621BBENGINE FUEL SHUT-
OFF VALVE ACCESS
PANEL
Open10
(b)(r)1621BBENGINE FUEL SHUT-
OFF VALVE ACCESS
PANEL
Clean11
(b)(r)(s)--SURFACEClean
(b)(t)-BMS 5-45, CLASS B-
1/2
SEALANTRemove12
(a) Remove the existing FiP gasket on the seal rib assembly, main track rib assembly, and attach strap.
(b) Use a non-metallic tool and make sure not to damage the surface of the metal or protective coating. Refer
to SOPM 20-50-19 as an accepted procedure.
(c) Remove existing sealant in the space between the seal rib assembly and adjacent attach strap.
(d) Remove existing sealant in the space between the main track rib assembly and adjacent attach strap.
Make sure all sealant is removed from the surround structure at the aft outboard side of the engine fuel
shutoff valve access panel. Remove sealant located on the underside of the main track rib assembly
flange and attach strap.
(e) Remove existing corrosion inhibiting compound from the shown surfaces where a FiP gasket or sealant
was applied. Refer to SOPM 20-50-19 as an accepted procedure.
(f) Clean the surfaces of the seal rib assembly, main track rib assembly, and attach strap which have had
the FiP gasket or sealant removed. Refer to SOPM 20-50-19 as an accepted procedure.
FIGURE 4: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FORM-IN-PLACE (FIP)
GASKET REPLACEMENT
(SHEET 3 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
35 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 3

More DataQtyIdentificationNameTaskStep
(g) If the surface finish on the structure in the shown area is cracked or shows signs of abrasion, repair
chemical and solvent resistant finish. Refer to SOPM 20-41-02 as an accepted procedure.
(h) BMS 5-45 shrinks when it cures, make sure that the sealant stays attached to the structure(s) after it
cures. It is optional to co-cure the sealant with the FiP gasket. Refer to SOPM 20-50-19 as an accepted
procedure.
(i) Fill the space between the seal rib assembly and adjacent attach strap flush with sealant.
(j) At the aft outboard side of the engine fuel shutoff valve access panel surround structure, build up the
sealant flush to fill the space between the flange of the main track rib assembly and adjacent attach strap.
It is permitted to apply sealant to the underside of these parts to secure the sealant. Refer to Boeing
Service Bulletin 737-57A1358 APPENDIX G for example application of main track rib assembly attach
strap space sealant on the right wing engine fuel shutoff valve access panel.
(k) Do not apply parting agent to the surround structure of the engine fuel shutoff valve access panel.
(l) Frekote 710-NC is permitted to be used as a parting agent.
(m) If Frekote 710-NC is used as a parting agent, do as follows:
– Apply two coats to the surfaces of the engine fuel shutoff valve access panel which are in contact
with the surround structure. Apply parting agent to the access panel only. Allow 5 to 10 minutes be-
tween each application. Allow 20 minutes after the second application before closing the access
panel. Extend the application area of parting agent to be more than 2 inch larger than the fay surface
area to allow for the squeeze out. Parting agent can be applied to the entire surface of the engine
fuel shutoff valve access panel. Do not touch applied parting agent.
(n) Make a FiP gasket. Apply sealant smooth and flat at the fay surface of the engine fuel shutoff valve access
panel surround structure. Enough sealant should be applied to achieve continuous squeeze-out along
the edges of the panel. After the access panel has latched close, continue to press up on the panel with
the same force used to latch the panel. Continue this pressure for 15 seconds to allow excess sealant to
squeeze out fully. Do not press up with more force than required to latch the panel or voids will be created
in the FiP gasket and the fluid leak test will fail.
(o) After closing the engine fuel shutoff valve access panel, while the FiP gasket sealant is still wet, remove
the sealant from the spaces between the edges of both the access panel and surrounding structure, except
for the sealant at the aft edge of the engine fuel shutoff valve access panel. Allow the sealant to cure.
Refer to SOPM 20-50-19 as an accepted procedure.
(p) After the sealant has cured, cycle the engine fuel shutoff valve access panel to break it free from the
sealant. It is acceptable to use a skin wedge to break the panel free. After cycling the panel, it should
open without assistance. Make sure that the sealant bonds to the access panel surround structure and
not the access panel. Trim excess cured sealant from door structure as required.
(q) After sealant has cured and door has been re-opened, remove and apply new parting agent. Refer to
SOPM 20-50-19 as an accepted procedure. In lieu of subsequent re-applications of parting agent every
time the door is re-opened, petrolatum that meets VV-P-236 specification or Krytox 240AC can be applied
to the panel as a post-cure lubricant. If petrolatum is applied to the panel after the sealant has cured, it
must be wiped off with a lint-free rag leaving behind a thin film. If Krytox 240AC is used, it does not have
to be wiped off.
FIGURE 4: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FORM-IN-PLACE (FIP)
GASKET REPLACEMENT
(SHEET 4 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
36 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 4

More DataQtyIdentificationNameTaskStep
(r) Remove any sealant adhering to the access panel or excess sealant squeeze that extends into the panel
opening from the surround structure.
(s) The FiP gasket and sealant must be removed and applied again if the sealing surface on the surround
structure of the engine fuel shutoff valve access panel does not meet all the conditions that follow:
1. No structure is visible in the FiP gasket area.
2. All sealant is evenly distributed.
3. No sealant is added after the initial sealant application time expires.
4. Any small cavities or depressions in the sealing surface which are less than or equal to 1/4 inch
in width, and 1/8 inch in length, are permitted if the cavities or depressions do not extend across
the full width of the sealed surface and maintain a minimum sealing surface of 1/4 inch.
5. The outboard aft corner of the gasket area is sealed and attached to the flange of the main track
rib assembly and attach strap.
(t) Remove any excess FiP gasket sealant from the notch at the aft edge of the engine fuel shutoff valve
access panel and forward of the lower skin panel.
FIGURE 4: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FORM-IN-PLACE (FIP)
GASKET REPLACEMENT
(SHEET 5 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
37 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 5 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
This Figure applies only to: Group 2.
SLAT STA  <
36.00
•
D€€
SLAT STA
36.00
UPPER SKIN
PANEL
MAIN TRACK
RIB ASSEMBLY
LOWER SKIN  ATTACH
PANEL  STRAP
ENGINE FUEL SHUTOFF VALVE ACCESS
PANEL SHOWN IN OPEN POSITION
(VIEW IN THE UP DIRECTION)
INSPECTION AREA  DETAILED  A-A  INB
AREA TO BE  3089223
CLEANED
FIGURE 5: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - PRE-FORMED SEAL AREA
DETAILED INSPECTION (DET)
(SHEET 1 OF 3)
Original Issue: November 17, 2025
737-57A1358 RB
Export Controlled ECCN: 9E991
See page 1 for details  38 of 63

### Page 6 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
_ MAIN TRACK  RIB ASSEMBLY
ATTACH
STRAP
NE
ENGINE FUEL SHUTOFF VALVE
ACCESS PANEL IS NOT SHOWN
AREA TO BE  3089302
_ CLEANED
FIGURE 5: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - PRE-FORMED SEAL AREA
DETAILED INSPECTION (DET)
(SHEET 2 OF 3)
Original Issue: November 17, 2025
Export Controlled ECCN: 9E991  737-57A1358 RB
See page 1 for details  39 of 63

### Page 7

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)--CORROSION INHIBIT-
ING COMPOUND
Remove1
(b)--SURFACEClean2
(c)(d)--SURFACEInspect3
(a) Remove existing corrosion inhibiting compound from the shown areas of the seal rib assembly, main track
rib assembly, and attach strap. Refer to SOPM 20-50-19 as an accepted procedure.
(b) Clean the shown areas and make sure there is no loose dirt, unwanted grease, or oil on the surface of
the substructure or existing pre-formed seal. Refer to SOPM 20-30-03 as an accepted procedure.
(c) Do a DET of the pre-formed seal area shown on the seal rib assembly, attach strap, and main track rib
assembly in areas which contact the engine fuel shutoff valve access panel for any damage on the pre-
formed seal.
(d) Pre-formed seal damage is defined as:
1. Tears or rips which extend across the full width of the pre-formed seal.
2. Partial or complete disbonding of the pre-formed seal from the access door.
FIGURE 5: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - PRE-FORMED SEAL AREA
DETAILED INSPECTION (DET)
(SHEET 3 OF 3)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
40 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 8 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
This Figure applies only to: Group 2.
SLAT STA
36.00
SLAT STA
36.00
UPPER SKIN
PANEL
SEAL RIB
•ASSEMBLY
MAIN TRACK
RIB ASSEMBLY
LOWER SKIN  ATTACH
PANEL  STRAP
ENGINE FUEL SHUTOFF VALVE ACCESS
PANEL SHOWN IN OPEN POSITION
DETAILED  (VIEW IN THE UP DIRECTION)
INSPECTION AREA  AREA TO BE  A-A  INBD  3089308
CLEANED
FIGURE 6: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - PRE-FORMED SEAL AREA
DETAILED INSPECTION (DET)
(SHEET 1 OF 3)
Original Issue: November 17, 2025
Export Controlled ECCN: 9E991  737-57A1358 RB
See page 1 for details  41 of 63

### Page 9 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
MAIN TRACK
RIB ASSEMBLY ~
ATTACH
STRAP
ENGINE FUEL SHUTOFF VALVE
ACCESS PANEL IS NOT SHOWN
AREA TO BE  3089309
CLEANED
FIGURE 6: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - PRE-FORMED SEAL AREA
DETAILED INSPECTION (DET)
(SHEET 2 OF 3)
Original Issue: November 17, 2025
Export Controlled ECCN: 9E991  737-57A1358 RB
See page 1 for details  42 of 63

### Page 10

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)--CORROSION INHIBIT-
ING COMPOUND
Remove1
(b)--SURFACEClean2
(c)(d)--SURFACEInspect3
(a) Remove existing corrosion inhibiting compound from the shown areas of the seal rib assembly, main track
rib assembly, and attach strap. Refer to SOPM 20-50-19 as an accepted procedure.
(b) Clean the shown areas and make sure there is no loose dirt, unwanted grease, or oil on the surface of
the substructure or existing pre-formed seal. Refer to SOPM 20-30-03 as an accepted procedure.
(c) Do a DET of the pre-formed seal area shown on the seal rib assembly, attach strap, and main track rib
assembly in areas which contact the engine fuel shutoff valve access panel for any damage on the pre-
formed seal.
(d) Pre-formed seal damage is defined as:
1. Tears or rips which extend across the full width of the pre-formed seal.
2. Partial or complete disbonding of the pre-formed seal from the access door.
FIGURE 6: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - PRE-FORMED SEAL AREA
DETAILED INSPECTION (DET)
(SHEET 3 OF 3)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
43 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 11 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
This Figure applies only to: Group 2.
SLAT STA  <
36.00
SLAT STA
36.00
UPPER SKIN
PANEL
SEAL RIB
ASSEMBLY
MAIN TRACK
RIB ASSEMBLY
14€8  10 13)  ATTACH  143U13  LOWER SKIN
STRAP  PANEL
ENGINE FUEL SHUTOFF VALVE ACCESS
PANEL SHOWN IN OPEN POSITION
(VIEW IN THE UP DIRECTION)
REMOVABLE FAY SEAL  APPLICATION AREA  A-A  INE
REMOVABLE FAY SEAL AND  3091703
SEALANT APPLICATION AREA
FIGURE 7: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - REMOVEABLE FAY SEAL
REPLACEMENT
(SHEET 1 OF 5)
Original Issue: November 17, 2025
737-57A1358 RB
Export Controlled ECCN: 9E991
See page 1 for details  44 of 63

### Page 12 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
- MAIN TRACK
RIB ASSEMBLY
14 3 013
14130฿
ATTACH STRAP
INBD
VIEW IN THE UP DIRECTION
112  SILICONE GASKET  SLAT STA  9/11/12
36.00
ENGINE FUEL SHUTOFF VALVE ACCESS
PANEL IS SHOWN IN OPEN POSITION
PRE-FORMED SEAL  (VIEW IN THE UP DIRECTION)
APPLICATION AREA
REMOVABLE FAY SEAL
APPLICATION AREA
REMOVABLE FAY SEAL AND  3091704
SEALANT APPLICATION AREA
FIGURE 7: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - REMOVEABLE FAY SEAL
REPLACEMENT
(SHEET 2 OF 5)
Original Issue: November 17, 2025
Export Controlled ECCN: 9E991  See page 1 for details  737-57A1358 RB  45 of 63

### Page 13

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)(b)--SEALANTRemove1
(b)(c)--SEALANTRemove2
(d)--CORROSION INHIBIT-
ING COMPOUND
Remove3
(e)(f)--SURFACEClean4
(g)(h)(i)-FREKOTE 710-NCPARTING AGENTApply5
(j)(k)-BMS 5-45, CLASS B-
1/2
SEALANTApply6
(l)-BMS 5-45, CLASS B-
1/2
SEALANTApply7
(j)(m)-BMS 5-45, CLASS B-
1/2
SEALANT (REMOV-
ABLE FAY SEAL)
Apply8
(n)1521BBENGINE FUEL SHUT-
OFF VALVE ACCESS
PANEL
Close9
(o)-BMS 5-45, CLASS B-
1/2
SEALANTClean10
(p)1521BBENGINE FUEL SHUT-
OFF VALVE ACCESS
PANEL
Open11
(b)(q)(r)1521BBENGINE FUEL SHUT-
OFF VALVE ACCESS
PANEL
Clean12
(b)(q)(r)1-SILICONE GASKETClean
(b)(s)--SURFACEClean13
(b)(t)-BMS 5-45, CLASS B-
1/2
SEALANTRemove14
(a) Remove all existing sealant from the shown areas on the seal rib assembly, main track rib assembly, and
attach strap. Refer to SOPM 20-50-19 as an accepted procedure.
(b) Use a non-metallic tool and make sure not to damage the surface of the metal or protective coating. Refer
to SOPM 20-50-19 as an accepted procedure.
(c) Remove all existing sealant in the space between the main track rib assembly and adjacent strap. Make
sure all sealant is removed from the surround structure at the aft outboard side of the engine fuel shutoff
valve access panel and from the underside of the main track rib assembly and attach strap. Refer to
SOPM 20-50-19 as an accepted procedure.
FIGURE 7: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - REMOVEABLE FAY SEAL
REPLACEMENT
(SHEET 3 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
46 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 14

More DataQtyIdentificationNameTaskStep
(d) Remove existing corrosion inhibiting compound from the surfaces of the engine fuel shutoff valve access
panel and silicone gasket. Refer to SOPM 20-50-19 as an accepted procedure.
(e) Clean the shown areas of the seal rib assembly, main track rib assembly, attach strap, and silicone gasket
to make sure there is no loose dirt, unwanted grease, or oil on the surface. Refer to SOPM 20-50-19 as
an accepted procedure.
(f) If the surface finish on the substructure in the shown area is cracked or shows signs of abrasion, repair
chemical and solvent resistant finish. Refer to SOPM 20-41-02 as an accepted procedure.
(g) Do not apply parting agent to the surround structure of the engine fuel shutoff valve access panel.
(h) Frekote 710-NC is permitted to be used as a parting agent.
(i) If Frekote 710-NC is used as a parting agent, do as follows:
– Apply two coats to the surface of the existing silicone gasket on the engine fuel shutoff valve access
panel which is in contact with the surround structure. Apply parting agent to the access panel only.
Allow 5 to 10 minutes between each application. Allow 20 minutes after the second application before
closing the access panel. Extend the application area of parting agent to be more than 2 inch larger
than the fay surface area to allow for the squeeze out. Parting agent can be applied to the entire
surface of the engine fuel shutoff valve access panel. Do not touch applied parting agent.
(j) Apply sealant smooth and flat to surfaces in the shown areas on the seal rib assembly, main track rib
assembly, and attach strap.
(k) Fill the space between the seal rib assembly and adjacent attach strap flush with sealant. BMS 5-45
shrinks when it cures, make sure that the sealant stays attached to the structure(s) after it cures. Refer
to SOPM 20-50-19 as an accepted procedure.
(l) Fill the space between the main track rib assembly and adjacent attach strap flush with sealant and make
sure the sealant surface is smooth and flat.
(m) BMS 5-182, Type 1, Class B-1/2 or PR-1826 primer and primer sealant are permitted to be used as an
alternative to BMS 5-45 Class B-1/2. Refer to SOPM 20-50-19 as an accepted procedure.
(n) Close and latch the access panel, then continue to press up on the panel with the same force used to
latch the panel. Continue this pressure for 15 seconds to allow excess sealant to squeeze out fully. Do
not press up with more force than required to latch the panel or voids will be created in the sealant.
(o) After closing the engine fuel shutoff valve access panel, while the sealant is still wet, remove the sealant
from the spaces between the edges of both the access panel and surrounding structure. Allow the sealant
to cure. Refer to SOPM 20-50-19 as an accepted procedure.
(p) After the sealant has cured, cycle the engine fuel shutoff valve access panel to break it free from the
sealant. It is acceptable to use a skin wedge to break the panel free. After cycling the panel, it should
open without assistance. Make sure that the sealant bonds to the access panel surround structure and
not the silicone gasket of the access panel. Trim excess cured sealant from door structure as required..
FIGURE 7: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - REMOVEABLE FAY SEAL
REPLACEMENT
(SHEET 4 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
47 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 15

More DataQtyIdentificationNameTaskStep
(q) After sealant has cured and door has been re-opened, remove and apply new parting agent. Refer to
SOPM 20-50-19 as an accepted procedure. In lieu of subsequent re-applications of parting agent every
time the door is re-opened, petrolatum that meets VV-P-236 specification or Krytox 240AC can be applied
to the surfaces of the access panel and its silicone gasket as a post-cure lubricant. If petrolatum is applied
to the panel after the sealant has cured, it must be wiped off with a lint-free rag leaving behind a thin film.
If Krytox 240AC is used, it does not have to be wiped off.
(r) Remove any sealant adhering to the access panel and its silicone gasket.
(s) Remove any excess sealant squeeze that extends into the panel opening from the surround structure.
(t) Remove any excess sealant from the notch at the aft edge of the engine fuel shutoff valve access panel
and forward of the lower skin panel.
FIGURE 7: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - REMOVEABLE FAY SEAL
REPLACEMENT
(SHEET 5 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
48 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 16 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
This Figure applies only to: Group 2.
SLAT STA
36.00
SLAT STA
36.00
UPPER SKIN
PANEL
SEAL RIB
•ASSEMBLY
MAIN TRACK
RIB ASSEMBLY
LOWER SKIN  14 8 10 13)  ATTACH  13
PANEL  STRAF
ENGINE FUEL SHUTOFF VALVE ACCESS
PANEL SHOWN IN OPEN POSITION
(VIEW IN THE UP DIRECTION)
REMOVABLE FAY SEAL  A-A
APPLICATION AREA
REMOVABLE FAY SEAL AND  NBD  3091706
SEALANT APPLICATION AREA
FIGURE 8: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - REMOVEABLE FAY SEAL
REPLACEMENT
(SHEET 1 OF 5)
Original Issue: November 17, 2025
Export Controlled ECCN: 9E991  737-57A1358 RB
See page 1 for details  49 of 63

### Page 17 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
MAIN TRACK
RIB ASSEMBLY
201ЗD13
ATTACH STRAP.
INBD
VIEW IN THE UP DIRECTION
SLAT STA  SILICONE GASKET
36.00
ENGINE FUEL SHUTOFF VALVE ACCESS
PANEL IS SHOWN IN OPEN POSITION
PRE-FORMED SEAL  (VIEW IN THE UP DIRECTION)
APPLICATION AREA
REMOVABLE FAY SEAL
APPLICATION AREA
REMOVABLE FAY SEAL AND  3091708
SEALANT APPLICATION AREA
FIGURE 8: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - REMOVEABLE FAY SEAL
REPLACEMENT
(SHEET 2 OF 5)
Original Issue: November 17, 2025
Export Controlled ECCN: 9E991  737-57A1358 RB
See page 1 for details  50 of 63

### Page 18

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)(b)--SEALANTRemove1
(b)(c)--SEALANTRemove2
(d)--CORROSION INHIBIT-
ING COMPOUND
Remove3
(e)(f)--SURFACEClean4
(g)(h)(i)-FREKOTE 710-NCPARTING AGENTApply5
(j)(k)-BMS 5-45, CLASS B-
1/2
SEALANTApply6
(l)-BMS 5-45, CLASS B-
1/2
SEALANTApply7
(j)(m)-BMS 5-45, CLASS B-
1/2
SEALANT (REMOV-
ABLE FAY SEAL)
Apply8
(n)1621BBENGINE FUEL SHUT-
OFF VALVE ACCESS
PANEL
Close9
(o)-BMS 5-45, CLASS B-
1/2
SEALANTClean10
(p)1621BBENGINE FUEL SHUT-
OFF VALVE ACCESS
PANEL
Open11
(b)(q)(r)1621BBENGINE FUEL SHUT-
OFF VALVE ACCESS
PANEL
Clean12
(b)(q)(r)1-SILICONE GASKETClean
(b)(s)--SURFACEClean13
(b)(t)-BMS 5-45, CLASS B-
1/2
SEALANTRemove14
(a) Remove all existing sealant from the shown areas on the seal rib assembly, main track rib assembly, and
attach strap. Refer to SOPM 20-50-19 as an accepted procedure.
(b) Use a non-metallic tool and make sure not to damage the surface of the metal or protective coating. Refer
to SOPM 20-50-19 as an accepted procedure.
(c) Remove all existing sealant in the space between the main track rib assembly and adjacent strap. Make
sure all sealant is removed from the surround structure at the aft outboard side of the engine fuel shutoff
valve access panel and from the underside of the main track rib assembly and attach strap. Refer to
SOPM 20-50-19 as an accepted procedure.
FIGURE 8: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - REMOVEABLE FAY SEAL
REPLACEMENT
(SHEET 3 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
51 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 19

More DataQtyIdentificationNameTaskStep
(d) Remove existing corrosion inhibiting compound from the surfaces of the engine fuel shutoff valve access
panel and silicone gasket. Refer to SOPM 20-50-19 as an accepted procedure.
(e) Clean the shown areas of the seal rib assembly, main track rib assembly, attach strap, and silicone gasket
to make sure there is no loose dirt, unwanted grease, or oil on the surface. Refer to SOPM 20-50-19 as
an accepted procedure.
(f) If the surface finish on the substructure in the shown area is cracked or shows signs of abrasion, repair
chemical and solvent resistant finish. Refer to SOPM 20-41-02 as an accepted procedure.
(g) Do not apply parting agent to the surround structure of the engine fuel shutoff valve access panel.
(h) Frekote 710-NC is permitted to be used as a parting agent.
(i) If Frekote 710-NC is used as a parting agent, do as follows:
– Apply two coats to the surface of the existing silicone gasket on the engine fuel shutoff valve access
panel which is in contact with the surround structure. Apply parting agent to the access panel only.
Allow 5 to 10 minutes between each application. Allow 20 minutes after the second application before
closing the access panel. Extend the application area of parting agent to be more than 2 inch larger
than the fay surface area to allow for the squeeze out. Parting agent can be applied to the entire
surface of the engine fuel shutoff valve access panel. Do not touch applied parting agent.
(j) Apply sealant smooth and flat to surfaces in the shown areas on the seal rib assembly, main track rib
assembly, and attach strap.
(k) Fill the space between the seal rib assembly and adjacent attach strap flush with sealant. BMS 5-45
shrinks when it cures, make sure that the sealant stays attached to the structure(s) after it cures. Refer
to SOPM 20-50-19 as an accepted procedure.
(l) Fill the space between the main track rib assembly and adjacent attach strap flush with sealant and make
sure the sealant surface is smooth and flat.
(m) BMS 5-182, Type 1, Class B-1/2 or PR-1826 primer and primer sealant are permitted to be used as an
alternative to BMS 5-45 Class B-1/2. Refer to SOPM 20-50-19 as an accepted procedure.
(n) Close and latch the access panel, then continue to press up on the panel with the same force used to
latch the panel. Continue this pressure for 15 seconds to allow excess sealant to squeeze out fully. Do
not press up with more force than required to latch the panel or voids will be created in the sealant.
(o) After closing the engine fuel shutoff valve access panel, while the sealant is still wet, remove the sealant
from the spaces between the edges of both the access panel and surrounding structure. Allow the sealant
to cure. Refer to SOPM 20-50-19 as an accepted procedure.
(p) After the sealant has cured, cycle the engine fuel shutoff valve access panel to break it free from the
sealant. It is acceptable to use a skin wedge to break the panel free. After cycling the panel, it should
open without assistance. Make sure that the sealant bonds to the access panel surround structure and
not the silicone gasket of the access panel. Trim excess cured sealant from door structure as required.
FIGURE 8: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - REMOVEABLE FAY SEAL
REPLACEMENT
(SHEET 4 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
52 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 20

More DataQtyIdentificationNameTaskStep
(q) After sealant has cured and door has been re-opened, remove and apply new parting agent. Refer to
SOPM 20-50-19 as an accepted procedure. In lieu of subsequent re-applications of parting agent every
time the door is re-opened, petrolatum that meets VV-P-236 specification or Krytox 240AC can be applied
to the surfaces of the access panel and its silicone gasket as a post-cure lubricant. If petrolatum is applied
to the panel after the sealant has cured, it must be wiped off with a lint-free rag leaving behind a thin film.
If Krytox 240AC is used, it does not have to be wiped off.
(r) Remove any sealant adhering to the access panel and its silicone gasket.
(s) Remove any excess sealant squeeze that extends into the panel opening from the surround structure.
(t) Remove any excess sealant from the notch at the aft edge of the engine fuel shutoff valve access panel
and forward of the lower skin panel.
FIGURE 8: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - REMOVEABLE FAY SEAL
REPLACEMENT
(SHEET 5 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
53 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 21

Do the following fluid leak test for the left side of the airplane:
1. Insert a 3/8 inch (9mm) inner diameter flexible plastic tube attached to a funnel into the space between
the engine fuel shutoff valve access panel and internal structure(s). Use one of the two options that
follow:
a. Option 1
(1) If closed, open engine fuel shutoff valve access panel (521BB). Refer to 737-7/8/8200/9/10
AMM 57-41-02 as an accepted procedure.
(2) Insert plastic tube between the space in the slats and the leading edge, and thru the lightening
hole of the leading edge nose beam. Refer to Figure A.1 as an aid illustration.
NOTE: Make sure there is a minimum 2 feet of tubing from the funnel to either the leading
edge nose beam or the main track rib assembly.
b. Option 2
(1) If closed, open engine fuel shutoff valve access panel (521BB). Refer to 737-7/8/8200/9/10
AMM 57-41-02 as an accepted procedure.
(2) If installed, remove and keep lower leading edge access panel - slat station 50.00 (521CB).
Refer to 737-7/8/8200/9/10 AMM 57-41-02 as an accepted procedure.
(3) Insert plastic tube into lower leading edge access panel - slat station 50.00 (521CB) and thru
the space between the thermal anti-icing duct and the hole in the main track rib assembly.
Refer to Figure A.2 as an aid illustration.
NOTE: Make sure there is a minimum 2 feet of tubing from the funnel to either the leading
edge nose beam or the main track rib assembly.
APPENDIX A:  LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FLUID LEAK TEST
(SHEET 1 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
54 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 22 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
SLAT STA
SLAT STA  50.00
36.00
WATER
LEADING EDGE
NOSE BEAM
SLAT STA
36.00
PLASTIC
TUBE
FUNNEL  SLAT STA
50.00
ANTI-ICING DUCT
MAIN TRACK
RIB ASSEMBLY
FIGURE A.1
ENGINE FUEL SHUTOFF VALVE AND LOWER
LEADING EDGE-SLAT STA 50.00 ACCESS
PANELS, AND SLATS ARE NOT SHOWN
(TYPICAL)
APPENDIX A: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FLUID LEAK TEST
(SHEET 2 OF 5)
Original Issue: November 17, 2025
737-57A1358 RB
Export Controlled ECCN: 9E991
See page 1 for details  55 of 63

### Page 23 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
SLAT STA
SLAT STA  50.00
36.00
WATER
SLAT STA
36.00
PLASTIC  TUBE -  • FUNNEL
SLAT STA
50.00
ANTI-ICING DUCT
MAIN TRACK
RIB ASSEMBLY
FIGURE A.2
ENGINE FUEL SHUTOFF VALVE AND LOWER
LEADING EDGE-SLAT STA 50.00 ACCESS  3089149
PANELS, AND SLATS ARE NOT SHOWN
(TYPICAL)
APPENDIX A: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FLUID LEAK TEST
(SHEET 3 OF 5)
Original Issue: November 17, 2025
Export Controlled ECCN: 9E991  737-57A1358 RB
See page 1 for details  56 of 63

### Page 24 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
2. Make sure the end of the tube is in the down and aft direction, and extends no more than 2 inches
inboard from the main track rib assembly. Refer to Figure A.3 below as an aid illustration.
SLAT STA
36.00
•
SLAT STA
36.00
ENGINE FUEL SHUTOFF VALVE  INBOARD EDGE OF MAIN  END OF PLASTIC TUBE
ACCESS PANEL HINGE  TRACK RIB ASSEMBLY
ANTI-ICING DUCT  ATTACH STRIP  EDGE OF  MAX  2.00
FIGURE A.3
ENGINE FUEL SHUTOFF VALVE AND LOWER
LEADING EDGE-SLAT STA 50.00 ACCESS
PANELS, AND SLATS ARE NOT SHOWN
(VIEW IN THE UP DIRECTION)
(TYPICAL)  3089151
A-A
APPENDIX A: LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FLUID LEAK TEST
(SHEET 4 OF 5)
Original Issue: November 17, 2025
Export Controlled ECCN: 9E991  737-57A1358 RB
See page 1 for details  57 of 63

### Page 25

3. Close engine fuel shutoff valve access panel (521BB). Refer to 737-7/8/8200/9/10 AMM 57-41-02 as
an accepted procedure.
4. Pour 32 ounces (1 liter) of water in less than 15 seconds through the funnel onto the engine fuel shutoff
valve access panel.
NOTE: It is recommended to prepare a bucket or container to catch the drained 32 ounces (1 liter)
of water from the aft fairing drain tube.
a. If water does not drain through the strut drain tube, clean the drain path and repeat the fluid leak
test.
b. If any water leaks from the engine fuel shutoff valve access panel in less than two minutes, the
fluid leak test has failed.
c. If water drains only through the strut drain tube, and no water leaks from the engine fuel shutoff
valve access panel for more than two minutes, the fluid leak test is successful and complete.
NOTE: The fluid leak test can result in a leak from the adjacent blowout door. Refer to
737-7/8/8200/9/10 AMM 57-41-02 as an accepted procedure to repair this leak.
APPENDIX A:  LEFT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FLUID LEAK TEST
(SHEET 5 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
58 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 26

Do the following fluid leak test for the right side of the airplane:
1. Insert a 3/8 inch (9mm) inner diameter flexible plastic tube attached to a funnel into the space between
the engine fuel shutoff valve access panel and internal structure(s). Use one of the two options that
follow:
a. Option 1
(1) If closed, open engine fuel shutoff valve access panel (621BB). Refer to 737-7/8/8200/9/10
AMM 57-41-02 as an accepted procedure.
(2) Insert plastic tube between the space in the slats and the leading edge, and thru the lightening
hole of the leading edge nose beam. Refer to Figure B.1 as an aid illustration.
NOTE: Make sure there is a minimum 2 feet of tubing from the funnel to either the leading
edge nose beam or the main track rib assembly.
b. Option 2
(1) If closed, open engine fuel shutoff valve access panel (621BB). Refer to 737-7/8/8200/9/10
AMM 57-41-02 as an accepted procedure.
(2) If installed, remove and keep lower leading edge access panel - slat station 50.00 (621CB).
Refer to 737-7/8/8200/9/10 AMM 57-41-02 as an accepted procedure.
(3) Insert plastic tube into lower leading edge access panel - slat station 50.00 (621CB) and thru
the space between the thermal anti-icing duct and the hole in the main track rib assembly.
Refer to Figure B.2 as an aid illustration.
NOTE: Make sure there is a minimum 2 feet of tubing from the funnel to either the leading
edge nose beam or the main track rib assembly.
APPENDIX B:  RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FLUID LEAK TEST
(SHEET 1 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
59 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

### Page 27 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
SLAT STA
50.00  SLAT STA
36.00
WATER
LEADING EDGE
NOSE BEAM
SLAT STA
36.00
PLASTIC
• TUBE
SLAT STA  FUNNEL
50.00
ANTI-ICING DUCT
MAIN TRACK
RIB ASSEMBLY
FIGURE B.1
ENGINE FUEL SHUTOFF VALVE AND LOWER
LEADING EDGE-SLAT STA 50.00 ACCESS  3089152
PANELS, AND SLATS ARE NOT SHOWN
(TYPICAL)
APPENDIX B: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FLUID LEAK TEST
(SHEET 2 OF 5)
Original Issue: November 17, 2025
Export Controlled ECCN: 9E991  737-57A1358 RB
See page 1 for details  60 of 63

### Page 28 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
SLAT STA
50.00  SLAT STA
36.00
WATER
SLAT STA
36.00
FUNNEL  PLASTIC  •TUBE
SLAT STA
50.00
ANTI-ICING DUCT
MAIN TRACK
RIB ASSEMBLY
FIGURE B.2
ENGINE FUEL SHUTOFF VALVE AND LOWER
LEADING EDGE-SLAT STA 50.00 ACCESS  3089153
PANELS, AND SLATS ARE NOT SHOWN
(TYPICAL)
APPENDIX B: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FLUID LEAK TEST
(SHEET 3 OF 5)
Original Issue: November 17, 2025
737-57A1358 RB
Export Controlled ECCN: 9E991
See page 1 for details  61 of 63

### Page 29 (OCR)

REQUIREMENTS BULLETIN 737-57A1358
ALERT  ALERT
2. Make sure the end of the tube is in the down and aft direction, and extends no more than 2 inches
inboard from the main track rib assembly. Refer to Figure B.3 below as an aid illustration.
SLAT STA
36.00
END OF PLASTIC TUBE  INBOARD EDGE OF MAIN  SLAT STA ENGINE FUEL SHUTOFF VALVE
TRACK RIB ASSEMBLY  36.00  ACCESS PANEL HINGE
MAX  2.00  ATTACH STRIP ANTI-ICING DUCT  EDGE OF
FIGURE B.3
ENGINE FUEL SHUTOFF VALVE AND LOWER
LEADING EDGE-SLAT STA 50.00 ACCESS
PANELS, AND SLATS ARE NOT SHOWN
(VIEW IN THE UP DIRECTION)
(TYPICAL)  3089154
A-A
APPENDIX B: RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FLUID LEAK TEST
(SHEET 4 OF 5)
Original Issue: November 17, 2025
Export Controlled ECCN: 9E991  737-57A1358 RB
See page 1 for details  62 of 63

### Page 30

3. Close engine fuel shutoff valve access panel (621BB). Refer to 737-7/8/8200/9/10 AMM 57-41-02 as
an accepted procedure.
4. Pour 32 ounces (1 liter) of water in less than 15 seconds through the funnel onto the engine fuel shutoff
valve access panel.
NOTE: It is recommended to prepare a bucket or container to catch the drained 32 ounces (1 liter)
of water from the aft fairing drain tube.
a. If water does not drain through the strut drain tube, clean the drain path and repeat the fluid leak
test.
b. If any water leaks from the engine fuel shutoff valve access panel in less than two minutes, the
fluid leak test has failed.
c. If water drains only through the strut drain tube, and no water leaks from the engine fuel shutoff
valve access panel for more than two minutes, the fluid leak test is successful and complete.
NOTE: The fluid leak test can result in a leak from the adjacent blowout door. Refer to
737-7/8/8200/9/10 AMM 57-41-02 as an accepted procedure to repair this leak.
APPENDIX B:  RIGHT WING - ENGINE FUEL SHUTOFF VALVE ACCESS PANEL - FLUID LEAK TEST
(SHEET 5 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: November 17, 2025
737-57A1358 RB
63 of 63
REQUIREMENTS BULLETIN 737-57A1358
ALERTALERT

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