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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-57A1338 RB Original Issue: September 25, 2017 ATA System: 5752 2751 SUBJECT: WINGS - Trailing Edge Flaps - Outboard Flap Tracks at Wing Buttock Line 254 and 355 Inspection Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 300-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws.
9E991ECCN:
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET Copyright © 2017 Boeing.
Unpublished Work. All Rights Reserved.
Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company.
Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing.
Original Issue: September 25, 2017 737-57A1338 RB 1 of 161
3.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 25, 2017 737-57A1338 RB 2 of 161 REQUIREMENTS BULLETIN 737-57A1338
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BLANK PAGE
Table of Contents
1 . E F F E C T I V I T Y5
A. Airplanes5
B . S p a r e s A f f e c t e d5
2. CONCURRENT REQUIREMENTS7
3 . C O M P L I A N C E7
4. APPROVAL ................................................ 3 4
5. ACCOMPLISHMENT INSTRUCTIONS .................................. 3 5 A. General Information ......................................... 3 5 B. Work Instructions ........................................... 3 7 FIGURE 1: LEFT WING - WBL 355 - FLAP TRACK POSITION 1 - DETAILED INSPECTION [Group 2-3] .................................................. 6 8 FIGURE 2: RIGHT WING - WBL 355 - FLAP TRACK POSITION 8 - DETAILED INSPECTION [Group 2-3] .................................................. 7 0 FIGURE 3: LEFT WING - WBL 254 - FLAP TRACK POSITION 2 - DETAILED INSPECTION [Group 2-3] .................................................. 7 2 FIGURE 4: RIGHT WING - WBL 254 - FLAP TRACK POSITION 7 - DETAILED INSPECTION [Group 2-3] .................................................. 7 4 FIGURE 5: LEFT WING - WBL 355 - FLAP TRACK POSITION 1 - SURFACE HFEC INSPECTION [Group 2 ] ................................................ 7 6 FIGURE 6: RIGHT WING - WBL 355 - FLAP TRACK POSITION 8 - SURFACE HFEC INSPECTION [Group 2 ] ................................................ 8 0 FIGURE 7: LEFT WING - WBL 355 - FLAP TRACK POSITION 1 - SURFACE HFEC INSPECTION [Group 3, Configuration 1] ....................................... 8 4 FIGURE 8: RIGHT WING - WBL 355 - FLAP TRACK POSITION 8 - SURFACE HFEC INSPECTION [Group 3, Configuration 1] ....................................... 8 8 FIGURE 11: LEFT WING - WBL 355 - FLAP TRACK POSITION 1 - SURFACE HFEC INSPECTION AND OPEN HOLE HFEC INSPECTION [Group 3, Configuration 2] ................ 9 2 FIGURE 12: RIGHT WING - WBL 355 - FLAP TRACK POSITION 8 - SURFACE HFEC INSPECTION AND OPEN HOLE HFEC INSPECTION [Group 3, Configuration 2] ................ 9 6 FIGURE 15: LEFT WING - WBL 254 - FLAP TRACK POSITION 2 - SURFACE HFEC INSPECTION [Group 2 ] ................................................ 1 0 0 FIGURE 16: RIGHT WING - WBL 254 - FLAP TRACK POSITION 7 - SURFACE HFEC INSPECTION [Group 2 ] ................................................ 1 0 3 FIGURE 17: LEFT WING - WBL 254 - FLAP TRACK POSITION 2 - SURFACE HFEC INSPECTION [Group 3, Configuration 1] ....................................... 1 0 6 FIGURE 18: RIGHT WING - WBL 254 - FLAP TRACK POSITION 7 - SURFACE HFEC INSPECTION [Group 3, Configuration 1] ....................................... 1 0 9 FIGURE 21: LEFT WING - WBL 254 - FLAP TRACK POSITION 2 - SURFACE HFEC INSPECTION AND OPEN HOLE HFEC INSPECTION [Group 3, Configuration 2] ............... 1 1 2 FIGURE 22: RIGHT WING - WBL 254 - FLAP TRACK POSITION 7 - SURFACE HFEC INSPECTION AND OPEN HOLE HFEC INSPECTION [Group 3, Configuration 2] ............... 1 1 5 FIGURE 25: LEFT WING - WBL 254 - FLAP TRACK POSITION 2 - SURFACE HFEC INSPECTION [Group 2 - 3 ] ............................................... 1 1 8 FIGURE 26: RIGHT WING - WBL 254 - FLAP TRACK POSITION 7 - SURFACE HFEC INSPECTION [Group 2 - 3 ] ............................................... 1 2 2 FIGURE 27: LEFT WING - WBL 355 - FLAP TRACK POSITION 1 - SURFACE HFEC INSPECTION AND ULTRASONIC INSPECTION [Group 2-3] .......................... 1 2 6 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 25, 2017 737-57A1338 RB 3 of 161 REQUIREMENTS BULLETIN 737-57A1338
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FIGURE 28: RIGHT WING - WBL 355 - FLAP TRACK POSITION 8 - SURFACE HFEC INSPECTION AND ULTRASONIC INSPECTION [Group 2-3] .......................... 1 2 8 FIGURE 29: LEFT WING - WBL 254 - FLAP TRACK POSITION 2 - SURFACE HFEC INSPECTION AND ULTRASONIC INSPECTION [Group 2-3] .......................... 1 3 0 FIGURE 30: RIGHT WING - WBL 254 - FLAP TRACK POSITION 7 - SURFACE HFEC INSPECTION AND ULTRASONIC INSPECTION [Group 2-3] .......................... 1 3 2 FIGURE 33: LEFT WING - WBL 355 - FLAP TRACK POSITION 1 - ANTI-FRET STRIP, TAPERED SHIM AND FLAP TRACK - DETAILED INSPECTION [Group 2-3] ................ 1 3 4 FIGURE 34: RIGHT WING - WBL 355 - FLAP TRACK POSITION 8 - ANTI-FRET STRIP, TAPERED SHIM AND FLAP TRACK - DETAILED INSPECTION [Group 2-3] ................ 1 3 7 FIGURE 39: LEFT WING - WBL 254 - FLAP TRACK POSITION 2 - ANTI-FRET STRIP, TAPERED SHIM AND FLAP TRACK - DETAILED INSPECTION [Group 2-3] ................ 1 4 0 FIGURE 40: RIGHT WING - WBL 254 - FLAP TRACK POSITION 7 - ANTI-FRET STRIP, TAPERED SHIM AND FLAP TRACK - DETAILED INSPECTION [Group 2-3] ................ 1 4 3 FIGURE 45: LEFT WING - WBL 355 - FLAP TRACK POSITION 1 - ANTI-FRET STRIP, TAPERED SHIM, FLAP TRACK AND BUSHING - DETAILED INSPECTION [Group 2-3] .......... 1 4 6 FIGURE 46: RIGHT WING - WBL 355 - FLAP TRACK POSITION 8 - ANTI-FRET STRIP, TAPERED SHIM, FLAP TRACK AND BUSHING - DETAILED INSPECTION [Group 2-3] .......... 1 4 8 FIGURE 47: LEFT WING - WBL 355 - FLAP TRACK POSITION 1 - SURFACE HFEC INSPECTION AND OPEN HOLE HFEC INSPECTION [Group 2-3] ....................... 1 5 0 FIGURE 48: RIGHT WING - WBL 355 - FLAP TRACK POSITION 8 - SURFACE HFEC INSPECTION AND OPEN HOLE HFEC INSPECTION [Group 2-3] ....................... 1 5 2 FIGURE 51: LEFT WING - WBL 254 - FLAP TRACK POSITION 2 - ANTI-FRET STRIP, TAPERED SHIM, FLAP TRACK AND BUSHING - DETAILED INSPECTION [Group 2-3] .......... 1 5 4 FIGURE 52: RIGHT WING - WBL 254 - FLAP TRACK POSITION 7 - ANTI-FRET STRIP, TAPERED SHIM, FLAP TRACK AND BUSHING - DETAILED INSPECTION [Group 2-3] .......... 1 5 6 FIGURE 53: LEFT WING - WBL 254 - FLAP TRACK POSITION 2 - SURFACE HFEC INSPECTION AND OPEN HOLE HFEC INSPECTION [Group 2-3] ....................... 1 5 8 FIGURE 54: RIGHT WING - WBL 254 - FLAP TRACK POSITION 7 - SURFACE HFEC INSPECTION AND OPEN HOLE HFEC INSPECTION [Group 2-3] ....................... 1 6 0 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 25, 2017 737-57A1338 RB 4 of 161 REQUIREMENTS BULLETIN 737-57A1338
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Commercial Airplanes 737 Requirements Bulletin ALERT Number: 737-57A1338 RB Original Issue: September 25, 2017 ATA System: 5752 2751 SUBJECT: WINGS - Trailing Edge Flaps - Outboard Flap Tracks at Wing Buttock Line 254 and 355 Inspection
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER. THIS IS AN ENHANCED REQUIRED FOR COMPLIANCE DOCUMENT. THE BOEING
PROCESSES USED TO CREATE THE SERVICE BULLETIN (SB) AND THE REQUIREMENTS BULLETIN (RB) ENSURE THAT THE INFORMATION BETWEEN "RC START" AND "RC END" IN THE SB ARE IDENTICAL TO THE INFORMATION IN THE SAME SECTIONS (COMPLIANCE, WORK INSTRUCTIONS…) OF THE RB WHICH THE SB REFERS TO AS THE RELATED DOCUMENT.
1. EFFECTIVITY A. Airplanes This bulletin is applicable to all 737-100/200/200C/300/400/500 Airplanes, line numbers 1 thru 3132.
DESCRIPTIONCONFIGURATIONGROUP 737-100/200/200C airplanes, line numbers 1 thru 291.-1 737-200/200C airplanes, line numbers 292 thru 1585 with outboard flap track assemblies 65-46428-( ), or 65-67158-( ).
-2 737-300/400/500 airplanes, line numbers 1001 thru 3132.-3 Airplanes with outboard flap track assemblies 65-46428-( ), or 65C34812-( ).
1 Airplanes with outboard flap track assemblies 65C35386-( ), or 65C35387-( ), or 65C35615-( ), or 65C35616-( ).
2 B. Spares Affected Examine your spares supply for the parts or components identified below. If any parts or components are found, refer to the Work Instructions for the recommended action.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 25, 2017 737-57A1338 RB 5 of 161
Flap Track PositionPart Number 1 / 865-46428-1 2 / 765-46428-11 1 / 865-46428-14 2 / 765-46428-15 1 / 865-46428-16 2 / 765-46428-17 1 / 865-46428-18 2 / 765-46428-19 2 / 765-46428-2 1 / 865-46428-20 2 / 765-46428-21 1 / 865-46428-22 2 / 765-46428-23 1 / 865-46428-24 2 / 765-46428-25 1 / 865-46428-26 2 / 765-46428-27 2 / 765-46428-3 1 / 865-46428-30 2 / 765-46428-31 1 / 865-46428-32 2 / 765-46428-33 1 / 865-46428-34 2 / 765-46428-35 2 / 765-46428-36 1 / 865-46428-4 2 / 765-46428-5 1 / 865-46428-6 2 / 765-46428-7 1 / 865-46428-8 2 / 765-46428-9 1 / 865-67158-1 2 / 765-67158-2 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 25, 2017 737-57A1338 RB 6 of 161 REQUIREMENTS BULLETIN 737-57A1338
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Flap Track PositionPart Number 2 / 765-67158-3 1 / 865-67158-5 2 / 765-67158-6 1 / 865C34812-2 2 / 765C34812-3 2 / 765C34812-4 1 / 865C34812-5 2 / 765C34812-6 1 / 865C34812-7 2 / 765C34812-8 1 / 865C35386-4 2 / 765C35387-4 1 / 865C35615-2 2 / 765C35616-5
2. CONCURRENT REQUIREMENTS None.
3. COMPLIANCE Federal Aviation Administration (FAA) Airworthiness Directive AD 2013-09-02 is related to Requirements Bulletin 737-57A1338 RB. The effective date of AD 2013-09-02 is June 13, 2013.
The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to Requirements Bulletin 737-57A1338 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 737-57A1338 RB mandatory.
Accomplish the required actions, based on the applicable conditions in Tables 1 through 4, in accordance with the Accomplishment Instructions.
When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION number or an OPTION number, do all of the ACTION numbers for that CONDITION number or OPTION number.
Group 1:
Boeing endorses the FAA rules related to Limit of Validity (LOV) and recommends immediate and permanent removal from service of any airplanes upon reaching the LOV, whether or not it is operated under FAA jurisdiction. As such, Boeing no longer provides maintenance instructions for airplanes that have accumulated flight cycles beyond the LOV. Airplanes in Group 1 (line numbers 1-291) have accumulated flight cycles beyond the LOV of the maintenance program. 14 CFR 121.1115 and 129.115 prohibit operation of an airplane beyond its LOV.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 25, 2017 737-57A1338 RB 7 of 161 REQUIREMENTS BULLETIN 737-57A1338
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Group 2; Group 3, Configuration 1:
The actions required for each INSPECTION in Table 1 are identified as follows:
Group 2; Group 3, Configuration 1:
ActionTitle ACTION 1: Inspect the flap track assembly for part number. As an alternative to the inspection, a review of the maintenance records can be used if the part number of the flap track assembly can be positively determined.
INSPECTION 1 ACTION 2: Do a detailed inspection of the flap track flanges and webs for any crack, any nick, any corrosion pit, any galling, any piece broken off, and any stop-drill repair.
ACTION 3: Do a surface High Frequency Eddy Current (HFEC) inspection of the flap track flanges and webs for any crack.
ACTION 4: Do a surface HFEC inspection and an ultrasonic inspection of the upper flap track flange for any crack.
ACTION 5: Do a detailed inspection of the anti-fret strip and the tapered shim for any damage and any corrosion.
ACTION 6: Do a detailed inspection of the flap track at the rear spar attachment for any crack, any corrosion and any loose fastener.
ACTION 1: Do a detailed inspection of the anti-fret strip for presence or absence of the anti-fret strip and for any damage and for material.
INSPECTION 2 ACTION 2: Do a detailed inspection of the tapered shim for presence or absence, any damage, any corrosion, and for material, and measure the width of the tapered shim normal to its aft edge.
ACTION 3: Do a detailed inspection of the flap track in the area of the rear spar attachment mating surface for any corrosion.
ACTION 4: Do a detailed inspection of the outer circumferential surface of the bushing for any corrosion.
ACTION 5: Do a surface HFEC inspection and an open hole HFEC inspection of the flap track for any crack.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 25, 2017 737-57A1338 RB 8 of 161 REQUIREMENTS BULLETIN 737-57A1338
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Group 2; Group 3, Configuration 1:
Table 1: Detailed Inspections and NDT Inspections of the Outboard Flap Tracks at Positions 1 and 8 Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later)ActionCondition -Within 6 months after the original issue date of Requirements Bulletin 737- 57A1338 RB.
Within 5,000 flap track flight cycles or 2 years, whichever occurs first, after the most recent overhaul of the affected flap track.
ACTION 1: Do IN- SPECTION 1 on each affected flap track.
Airplanes with flap tracks that have known maintenance records and on which an overhaul was done -Within 6 months after the original issue date of Requirements Bulletin 737- 57A1338 RB.
Whichever Occurs FirstACTION 2: Do an overhaul of each affected flap track. Within 10,000flap track flight cycles or 4 years, whichever occurs first, after the first inspection of the affected flap track in accordance with Requirements Bulletin 737- 57A1338 RB.
Within 20,000 flap track flight cycles or 8 years, whichever occurs first, after the most recent overhaul of the affected flap track.
-Within 6 months after the original issue date of Requirements Bulletin 737- 57A1338 RB.
Within 10,000 flap track flight cycles or 4 years, whichever occurs first, since the affected flap track was new.
ACTION 1: Do IN- SPECTION 1 on each affected flap track.
Airplanes with flap tracks that have known maintenance records and on which no overhaul was done -Within 6 months after the original issue date of Requirements Bulletin 737- 57A1338 RB.
Within 20,000 flap track flight cycles or 8 years, whichever occurs first, since the affected flap track was new.
ACTION 2: Do an overhaul of each affected flap track.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 25, 2017 737-57A1338 RB 9 of 161 REQUIREMENTS BULLETIN 737-57A1338
ALERTALERT
Group 2; Group 3, Configuration 1:
Table 1: Detailed Inspections and NDT Inspections of the Outboard Flap Tracks at Positions 1 and 8 Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later)ActionCondition -Within 6 months after the original issue date of Requirements Bulletin 737-57A1338 RB.
ACTION 1: Do IN- SPECTION 1 on each affected flap track.
Airplanes with flap tracks that have unknown maintenance records -Within 6 months after the original issue date of Requirements Bulletin 737-57A1338 RB.
ACTION 2: Do an overhaul of each affected flap track.
-Before further flight.Remove the flap track and install a new or serviceable flap track. (b) CONDITION 101: FLAP
TRACK ASSEMBLY PART NUMBER IS 65- 46428-30 OR 65- 46428-32 (a) -Before further flight.Remove the flap track and install a new or serviceable flap track. (b) CONDITION 102: ANY
CRACK, ANY NICK,
ANY CORROSION PIT,
ANY GALLING, ANY
PIECE BROKEN OFF
OR ANY STOP-DRILL REPAIR FOUND during INSPECTION 1 (a) 10,000 flap track flight cycles or 4 years, whichever occurs first.
-Repeat INSPEC- TION 1.
CONDITION 103: NO
CRACK, NO NICK, NO
CORROSION PIT, NO
GALLING, NO PIECE
BROKEN OFF AND
NO STOP-DRILL RE- PAIR FOUND during INSPECTION 1 (a) -Before further flight.ACTION 1: Do IN- SPECTION 2 and all applicable related corrective actions.
CONDITION 104: ANY
DAMAGE OR ANY
CORROSION FOUND
ON THE ANTI-FRET
STRIP OR ON THE TAPERED SHIM; OR
ANY CORROSION OR
ANY LOOSE FASTEN-
ER FOUND ON THE
FLAP TRACK AT THE
REAR SPAR ATTACH- MENT during INSPEC- TION 1 (a) -Before further flight.ACTION 2: Install the repaired flap track, or a new or serviceable flap track. (b) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 25, 2017 737-57A1338 RB 10 of 161 REQUIREMENTS BULLETIN 737-57A1338
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Group 2; Group 3, Configuration 1:
Table 1: Detailed Inspections and NDT Inspections of the Outboard Flap Tracks at Positions 1 and 8 Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later)ActionCondition 10,000 flap track flight cycles or 4 years, whichever occurs first.
-Repeat INSPEC- TION 1.
CONDITION 105: NO
DAMAGE AND NO
CORROSION FOUND
ON THE ANTI-FRET
STRIP AND ON THE TAPERED SHIM; AND
NO CORROSION AND
NO LOOSE FASTEN-
ER FOUND ON THE
FLAP TRACK AT THE
REAR SPAR ATTACH- MENT during INSPEC- TION 1 (a) -Before further flight.ACTION 1: Remove the anti-fret strip and install a new anti-fret strip.
CONDITION 106: AN-
TI-FRET STRIP IS
MISSING OR ANTI-
FRET STRIP IS MADE
FROM PHENOLIC MA-
TERIAL OR ANY DAM-
AGE FOUND ON THE
ANTI-FRET STRIP during INSPECTION 2
(a) 10,000 flap track flight cycles or 4 years, whichever occurs first.
-ACTION 2: Repeat INSPECTION 1.
10,000 flap track flight cycles or 4 years, whichever occurs first.
-Repeat INSPEC- TION 1.
CONDITION 107: AN-
TI-FRET STRIP IS
NOT MISSING AND
ANTI-FRET STRIP IS
NOT MADE FROM
PHENOLIC MATERIAL
AND NO DAMAGE
FOUND ON THE ANTI- FRET STRIP during INSPECTION 2 (a) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 25, 2017 737-57A1338 RB 11 of 161 REQUIREMENTS BULLETIN 737-57A1338
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Group 2; Group 3, Configuration 1:
Table 1: Detailed Inspections and NDT Inspections of the Outboard Flap Tracks at Positions 1 and 8 Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later)ActionCondition -Before further flight.ACTION 1: Remove the tapered shim and install a new tapered shim.
CONDITION 108: TA-
PERED SHIM IS
MISSING OR TA-
PERED SHIM IS MADE
FROM LAMINATED
MATERIAL OR WIDTH
OF TAPERED SHIM IS LESS THAN 1.70
INCHES OR ANY
DAMAGE OR ANY
CORROSION FOUND
ON THE TAPERED SHIM during INSPEC- TION 2 (a) 10,000 flap track flight cycles or 4 years, whichever occurs first.
-ACTION 2: Repeat INSPECTION 1.
10,000 flap track flight cycles or 4 years, whichever occurs first.
-Repeat INSPEC- TION 1.
CONDITION 109: TA-
PERED SHIM IS NOT
MISSING AND TA-
PERED SHIM IS NOT
MADE FROM LAMI-
NATED MATERIAL
AND WIDTH OF TA- PERED SHIM IS 1.70
INCHES OR MORE
AND NO DAMAGE
AND NO CORROSION
FOUND ON THE TA- PERED SHIM during INSPECTION 2 (a) -Before further flight.ACTION 1: Repair the flap track.
CONDITION 110: ANY
CORROSION OR ANY
CRACK FOUND ON
THE FLAP TRACK
THAT IS IN THE RE-
PAIR LIMITS OF CMM 57-53-15 during IN- SPECTION 2 (a)(c) 10,000 flap track flight cycles or 4 years, whichever occurs first.
-ACTION 2: Repeat INSPECTION 1.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: September 25, 2017 737-57A1338 RB 12 of 161 REQUIREMENTS BULLETIN 737-57A1338