# Boeing Alert Requirements Bulletin MD80-57A246 RB: No revision named

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- Document: [Boeing Alert Requirements Bulletin MD80-57A246 RB](https://openairdocs.org/service-documents/boeing/md80-57a246-rb.md)
- Title as filed: MD80-57A246 RB
- Pages: 10
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### Page 1

Commercial 
Airplanes
MD80
Requirements Bulletin
ALERT
Number: MD80-57A246 RB
Original Issue: December 17, 2021
ATA System: 5712 5713
SUBJECT: WINGS - Main Frame - Left and Right Side Center Wing Lower Stringers S-11 Through
S-22 Replacement
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:
Copyright © 2021 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Unpublished Work.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: December 17, 2021
MD80-57A246 RB
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2.0

### Page 2

Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: December 17, 2021
MD80-57A246 RB
2 of 10
REQUIREMENTS BULLETIN MD80-57A246
ALERTALERT
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Table of Contents
1 . E F F E C T I V I T Y  ................................................ 5
A . A i r p l a n e s  ................................................ 5
B . S p a r e s  A f f e c t e d  ............................................ 7
2. CONCURRENT REQUIREMENTS ..................................... 7
3 . C O M P L I A N C E  ................................................ 7
4. APPROVAL ................................................. 7
5. ACCOMPLISHMENT INSTRUCTIONS .................................. 9
A. General Information .......................................... 9
B . W o r k  I n s t r u c t i o n s  ........................................... 1 0
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REQUIREMENTS BULLETIN MD80-57A246
ALERTALERT

### Page 4

Export Controlled ECCN: 9E991
Copyright © Unpublished
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Original Issue: December 17, 2021
MD80-57A246 RB
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REQUIREMENTS BULLETIN MD80-57A246
ALERTALERT
BLANK PAGE

### Page 5

Commercial 
Airplanes
MD80
Requirements Bulletin
ALERT
Number: MD80-57A246 RB
Original Issue: December 17, 2021
ATA System: 5712 5713
SUBJECT: WINGS - Main Frame - Left and Right Side Center Wing Lower Stringers S-11 Through
S-22 Replacement
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 DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87
(MD-87), MD-88 Airplane(s), line number(s) 909, 917, 924, 938, 941, 944, 946, 948, 950, 952-953,
955, 957-958, 960, 962-963, 965-967, 969-971, 973-975, 977-979, 981, 983, 985-986, 988-989,
991-992, 994-999, 1000-1013, 1015-1016, 1018-1020, 1022-1023, 1025-1026, 1028-1029,
1031-1032, 1034-1035, 1037-1038, 1040-1041, 1043, 1045, 1047, 1049, 1051, 1053, 1055, 1057,
1059-1080, 1082-1083, 1085-2007, 2009-2016, 2019-2034, 2036-2069, 2071-2093, 2101-2114,
2116, 2118-2119, 2121, 2124, 2127-2128, 2130, 2132, 2134-2135, 2137, 2139, 2145, 2148,
2151-2152, 2155, 2167, 2174, 2176, 2178, 2180, 2183, 2185, 2187, 2189, 2192, 2196, 2199,
2201, 2204, 2206, 2208, 2214, 2218, 2234, 2239, 2241, 2244, 2247, 2249, 2252, 2254, 2264-2287
in 3 Group(s). Where the effectivity is presented with hyphens between line numbers, the airplane
applicability means "through" and "inclusive", e.g. line numbers 1-9 means line numbers 1 through
9 inclusive.
The Variable Numbers and Group Information for the applicable airplanes is given below.
DESCRIPTIONCONFIGURATIONGROUP
DC-9-81 (MD-81) and DC-9-82 (MD-82) airplanes with baseline center
wing lower stringers.
-1
DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87
(MD-87) and MD-88 airplanes with redesigned center wing lower
stringer 17.
-2
Export Controlled ECCN: 9E991
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Original Issue: December 17, 2021
MD80-57A246 RB
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### Page 6

DESCRIPTIONCONFIGURATIONGROUP
DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87
(MD-87) and MD-88 airplanes with redesigned center wing lower
stringer 11 and stringer 17.
-3
Airplane Models:
DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), MD-88
GroupFuselage Number
1909
1917
1924
1938
1941
1944
1946
1948
1950
1952 - 953
1955
1957 - 958
1960
1962 - 963
1965 - 967
1969 - 971
1973 - 975
1977 - 979
1981
1983
1985 - 986
1988 - 989
1991 - 992
1994 - 1013
11015 - 1016
GroupFuselage Number
11018 - 1020
11022 - 1023
11025 - 1026
11028 - 1029
11031 - 1032
11034 - 1035
11037 - 1038
11040 - 1041
11043
11045
11047
11049
11051
11053
11055
11057
11059 - 1080
11082 - 1083
11085 - 1168
21169
11170 - 1193
21194 - 1771
31772
21773 - 1797
31798
GroupFuselage Number
21799 - 1806
31807
21808 - 1865
31866 - 2007
32009 - 2016
32019 - 2034
32036 - 2069
32071 - 2093
32101 - 2114
32116
32118 - 2119
32121
32124
32127 - 2128
32130
32132
32134 - 2135
32137
32139
32145
32148
32151 - 2152
32155
32167
32174
Export Controlled ECCN: 9E991
Copyright © Unpublished
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Original Issue: December 17, 2021
MD80-57A246 RB
6 of 10
REQUIREMENTS BULLETIN MD80-57A246
ALERTALERT

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GroupFuselage Number
32176
32178
32180
32183
32185
32187
32189
32192
32196
GroupFuselage Number
32199
32201
32204
32206
32208
32214
32218
32234
32239
GroupFuselage Number
32241
32244
32247
32249
32252
32254
32264 - 2287
--
--
B. Spares Affected
None.
2. CONCURRENT REQUIREMENTS
None.
3. COMPLIANCE
The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to
Requirements Bulletin MD80-57A246 RB. The Airworthiness Directive will make the compliance tasks and
times given in Requirements Bulletin MD80-57A246 RB mandatory.
Accomplish the required action, based on the applicable condition in Table 1, in accordance with
Accomplishment Instructions.
Table 1: Wings - Center Wing Lower Stringers S-11 Through S-22 - Replacement
Repeat Interval
(Not to Exceed)
Compliance TimeActionCondition
-Before 81,740 Total
Flight Cycles.
Contact The Boeing
Company for replacement
instructions and do the
replacement of the center
wing lower stringers S-11
through S-22 between
Xcw=0 to Xcw=121.688
left and right sides.
All airplanes.
4. APPROVAL
This Requirements Bulletin was examined by the Federal Aviation Administration (FAA). The changes
specified in this document comply with the applicable regulations and are FAA approved. This document
and its approval were based on the airplane in its original Boeing delivery configuration or as modified by
other Boeing changes.
Export Controlled ECCN: 9E991
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Original Issue: December 17, 2021
MD80-57A246 RB
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REQUIREMENTS BULLETIN MD80-57A246
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### Page 8

If an airplane has a non-Boeing modification or repair that affects a component or system also affected by
this Requirements Bulletin, the operator is responsible for obtaining appropriate regulatory agency approval
before incorporating this Requirements Bulletin.
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: December 17, 2021
MD80-57A246 RB
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REQUIREMENTS BULLETIN MD80-57A246
ALERTALERT

### Page 9

5.    ACCOMPLISHMENT INSTRUCTIONS
A. GENERAL INFORMATION
IF ELECTRICAL POWER IS APPLIED TO THE AIRPLANE, MAKE SURE YOU
OBEY ALL PRECAUTIONS WHILE YOU DO WORK. IF YOU DO NOT OBEY THE
PRECAUTIONS, DEATH OR INJURY TO PERSONS, AND DAMAGE TO THE
AIRPLANE CAN OCCUR.WARNING
ELECTRICALLY GROUND THE AIRPLANE. THIS WILL HELP TO PREVENT
DAMAGE TO THE AIRPLANE OR EQUIPMENT.CAUTION
KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF
METAL PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED
MATERIAL, METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE
BUNDLES CAN CAUSE DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES
CAN CAUSE SPARKS OR OTHER ELECTRICAL DAMAGE.
CAUTION
NOTE: 1. This is an Enhanced Required for Compliance document. There will be a separate
Service Bulletin (SB) and a separate Requirements Bulletin (RB). If an RB is mandated
by an Airworthiness Directive (AD), then all applicable requirements specified in the
RB must be done. For the related SB, some locations are marked RC Start and RC
End to identify the requirements that are restated from the RB. For the related SB,
the areas between RC Start and RC End, including sub-steps and any figures
identified between RC Start and RC End, must be done to comply with the AD.
Therefore, an Alternative Method of Compliance (AMOC) is required for any deviations
to steps between RC Start and RC End, including substeps and identified figures.
For the related SB, the steps not between RC Start and RC End may be deviated
from using accepted methods in accordance with the operator's maintenance or
inspection program without obtaining approval of an AMOC; this is provided that the
steps between RC Start and RC End, including sub-steps and identified figures, can
still be done as specified, and the airplane can be put back in an airworthy condition.
Figures not required for compliance are omitted from the RB.
2. 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.
3. The compliance times for the actions in WORK INSTRUCTIONS are in Compliance.
4. Unless shown differently, these dimensions and tolerances are used:
– Linear dimensions are in inches
– Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus
or minus 0.03 inch
– Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch
– Angular tolerance is plus or minus 2 degrees
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: December 17, 2021
MD80-57A246 RB
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REQUIREMENTS BULLETIN MD80-57A246
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### Page 10

– Hole dimensions for standard solid rivets and fasteners are in Structural Repair
Manual (SRM) Chapter 51
– Torque Values:
— Values for structural fasteners are given in MD-80 Structural Repair Manual,
Chapter 51.
— Values for airframe maintenance tasks are included in Chapter 20 of MD-80
Aircraft Maintenance Manual (AMM).
— Values for electrical maintenance tasks are included in Chapter 20 of
Standard Wiring Practices Manual (SWPM).
— Values for engine maintenance tasks are included in Chapter 70 of MD-80
Aircraft Maintenance Manual (AMM).
— Non-standard torque values for maintenance tasks are included in the
applicable installation step.
5. These work instructions refer to procedures included in other Boeing documents.
When the words "refer to" are used and the operator has an accepted alternative
procedure, the accepted alternative procedure can be used. When the words "in
accordance with" are included in the instruction, the procedure in the Boeing document
must be used.
6. If it is necessary to remove more parts for access, you can remove those parts. If
you can get access without removing identified parts, it is not necessary to remove
all of the identified parts. Jacking and shoring limitations must be observed.
B. WORK INSTRUCTIONS
Actions Required for Compliance
1. Requirements
Table 1: Wings - Center Wing Lower Stringers S-11 Through S-22 - Replacement
Refer to the listed
procedures in SB
MD80-57A246
Original Issue or
later approved re-
visions as an ac-
cepted proce-
dure.
Method of ComplianceActionCondition
PART 1: OPEN
ACCESS.
-Contact The Boeing Company
for replacement instructions and
do the replacement of the center
wing lower stringers S-11
through S-22 between Xcw=0
to Xcw=121.688 left and right
sides.
All airplanes
PART 2: CLOSE
ACCESS.
-
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: December 17, 2021
MD80-57A246 RB
10 of 10
REQUIREMENTS BULLETIN MD80-57A246
ALERTALERT

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