TextPartly OCR
Some pages are OCR from a scan. OCR can misread letters and numbers.
Query with SQL
duckdb -csv -c "SELECT p.page, p.text_source, p.text, f.rights_holder, f.license FROM 'https://openairdocs.org/data/latest/service_document_file_page.parquet' p JOIN 'https://openairdocs.org/data/latest/service_document_file.parquet' f USING (file_sha256) WHERE p.file_sha256 = '4b5441398c8af3e194eb687e81ce6d8f31cd0b3bbd3c2dfc91b3978d3225d444' ORDER BY p.page"
Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT p.page, p.text_source, p.text, f.rights_holder, f.license FROM 'https://openairdocs.org/data/latest/service_document_file_page.parquet' p JOIN 'https://openairdocs.org/data/latest/service_document_file.parquet' f USING (file_sha256) WHERE p.file_sha256 = '4b5441398c8af3e194eb687e81ce6d8f31cd0b3bbd3c2dfc91b3978d3225d444' ORDER BY p.page
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
Commercial Airplanes MD90 Service Bulletin ALERT Number: MD90-57A031 Original Issue: March 19, 2019 ATA System: 5730 SUBJECT: WINGS - Lower Wing Skin - Inspection of Left and Right Center Wing Lower Skins and Stringers 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 © 2019 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Unpublished Work.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: March 19, 2019 MD90-57A031 1 of 34
2.0
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 19, 2019 MD90-57A031 2 of 34 BOEING SERVICE BULLETIN MD90-57A031
ALERTALERT
BLANK PAGE
Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected11
B. Concurrent Requirements11
C. Reason11
D. Description12
E. Compliance12
F. Approval13
G. Manpower14
H. Weight and Balance Changes14
I. Electrical Load Data14
J. References14
1. Existing Data:14
2. Data Supplied with this Service Bulletin:14
3. Installation Drawings Used in the Preparation of this Service Bulletin:17
K. Publications Affected17
L. Interchangeability and Intermixability of Parts17
M. Software Accomplishment Summary17
2. MATERIAL INFORMATION19
A. Material - Price and Availability19
B. Industry Support Information19
C. Parts Necessary for Each Airplane19
1. Kits/Parts19
2. Parts and Materials Supplied by the Operator19
3. Parts Modified and Reidentified19
4. Parts Removed and Not Replaced19
D. Parts Necessary to Change Spares20
E. Special Tooling - Price and Availability20
F. Special Tooling Necessary to do this Service Bulletin20
3. ACCOMPLISHMENT INSTRUCTIONS21
A. GENERAL INFORMATION21
B. WORK INSTRUCTIONS22
FIGURE 1: OPEN ACCESS - CENTER WING LOWER SKIN PANELS24
FIGURE 2: INSPECTION - CENTER WING LOWER SKIN - EDDY CURRENT, LOW FREQUENCY (ETLF)
AND EDDY CURRENT, HIGH FREQUENCY (ETHF) INSPECTIONS27
FIGURE 3: CLOSE ACCESS - CENTER WING LOWER SKIN PANELS30
APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE TABLE 1: EDDY CURRENT, LOW
FREQUENCY (ETLF) AND EDDY CURRENT, HIGH FREQUENCY (ETHF) INSPECTIONS OF
LEFT AND RIGHT CENTER WING LOWER SKINS AND STRINGERS33
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 19, 2019 MD90-57A031 3 of 34 BOEING SERVICE BULLETIN MD90-57A031
ALERTALERT
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 19, 2019 MD90-57A031 4 of 34 BOEING SERVICE BULLETIN MD90-57A031
ALERTALERT
BLANK PAGE
Commercial Airplanes MD90 Service Bulletin ALERT SummaryNumber: MD90-57A031Original Issue: March 19, 2019 ATA System: 5730 SUBJECT: WINGS - Lower Wing Skin - Inspection of Left and Right Center Wing Lower Skins and Stringers
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.
CONCURRENT REQUIREMENTS None.
BACKGROUND Accomplishment of this service bulletin will make sure any crack on the left and right center wing lower skins and stringers at the fastener holes common to Stringers 11 through 22 and around the external bracket angle at Stringers 18 and 19 is found. If this service bulletin is not done, undetected fatigue cracks may result in the inability of the structure to sustain limit loads, which could adversely affect the structural integrity of the airplane.
The MD-90 center wing stringers and skins have been identified to potentially be susceptible to cracking, based on MD-80 service experience. MD-80 and MD-90 wings share the same basic design and have similar stresses.
MD-80 operators have reported finding cracks in the center wing lower stringers, lower stringer end fittings, and lower forward and aft skins. The cracks in stringers occur at the inboard end where they are joined to the aircraft centerline by end fittings. Cracks in the end fittings occur at the outboard end where they attach to stringers.
The wing skin cracks occur underneath a cracked stringer. The cause of the cracks has been determined to be from fatigue. The Boeing Company has not received any reports of cracks on MD90 airplanes.
Boeing Service Related Problem (SRP) MD90-SRP-57-0312 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) MD-90 FTD 57-17001 is related to this service bulletin.
This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedNoSpares Affected Paragraph 1.E., Compliance and Paragraph
1.F., Approval YesAD Related Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 19, 2019 MD90-57A031 5 of 34
ReferenceAffectedPlanning Data Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedNoPublications Affected Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator YesOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION Get access to the left and right center wing lower skins, stringers S-11 thru S-22 between Xcw=0 and Xcw=20 under the wing/fuselage fillet panels. Do an Eddy Current, Low Frequency (ETLF) inspection of the left and right side fastener holes common to stringers 11 thru 22 and the forward and aft skins for any crack and do an Eddy Current, High Frequency (ETHF) inspection of the lower skin at stringers 18 thru 20 for any crack. If any crack is found, contact The Boeing Company for repair instructions and do the repair; and repeat the inspections for any crack in the unrepaired area. If no crack is found, repeat the inspections for any crack.
EFFECTIVITY All MD-90-30 Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
COMPLIANCE The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory.
Refer to Paragraph 1.E., Compliance.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspection given in this service bulletin.
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Operator Supplied Parts/Materials.
Refer to Paragraph 2.A., Material - Price and Availability.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 19, 2019 MD90-57A031 6 of 34 BOEING SERVICE BULLETIN MD90-57A031
ALERTALERT
BOEING SERVICE BULLETIN MD90-57A031
ALERT ALERT
DO AN EDDY CURRENT, LOW FREQUENCY (ETLF)
INSPECTION OF FASTENER HOLES COMMON TO STRINGERS 11 THRU 22 AND THE FORWARD AND AFT SKINS FOR ANY CRACK.
DO AN EDDY CURRENT, HIGH FREQUENCY
ETHF) INSPECTION OF THE LOWER SKIN AT STRINGERS 18 THRU 20 FOR ANY CRACK.
Xcw=0.000 Xcw=20.000 STRINGERS 11-22 INSPECTION AREA STRINGER 22
•- STRINGER 21
•- STRINGER 20
- STRINGER 19 ' STRINGER 18
• STRINGER 17
• STRINGER 16 STRINGER 15 STRINGER 14
• STRINGER 13
• STRINGER 12 STRINGER 11
- REAR SPAR
- SKIN
STRINGER
LOWER WING SKINS AND STRINGERS
LEFT SIDE SHOWN, RIGHT SIDE OPPOSITE (VIEW LOOKING DOWN) INSPECTION AREA 2859026 Original Issue: March 19, 2019 Export Controlled ECCN: 9E991 MD90-57A031 Copyright © Unpublished Work - See page 1 for details. 7 of 34
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 19, 2019 MD90-57A031 8 of 34 BOEING SERVICE BULLETIN MD90-57A031
ALERTALERT
BLANK PAGE
Commercial Airplanes MD90 Service Bulletin ALERT Number: MD90-57A031 Original Issue: March 19, 2019 ATA System: 5730 SUBJECT: WINGS - Lower Wing Skin - Inspection of Left and Right Center Wing Lower Skins and Stringers
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.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes This bulletin is applicable to MD-90-30 Airplane(s), line number(s) 2018, 2094-2100, 2115, 2117, 2120, 2122-2123, 2125-2126, 2129, 2131, 2133, 2136, 2138, 2140-2144, 2146-2147, 2149-2150, 2153-2154, 2156-2166, 2168-2173, 2175, 2177, 2179, 2181-2182, 2184, 2186, 2190-2191, 2193-2195, 2197-2198, 2200, 2202-2203, 2205, 2207, 2209-2213, 2215-2217, 2219-2233, 2235-2238, 2240, 2242-2243, 2245-2246, 2248, 2250-2251, 2253, 2255-2263, 2288-2290, 4001-4002 in 1 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.
This bulletin is applicable to all MD-90-30 Airplanes, line numbers 2018 - 4002 in 1 Group.
The Variable Numbers and Group Information for the applicable airplanes is given below.
DESCRIPTIONCONFIGURATIONGROUP All MD-90-30 Airplanes, line numbers 2018 - 4002.-1 Airplane Models:
MD-90-30 GroupFuselage Number 12018 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 19, 2019 MD90-57A031 9 of 34
GroupFuselage Number 12094 - 2099 12100 12115 12117 12120 12122 - 2123 12125 - 2126 12129 12131 12133 12136 12138 12140 - 2144 12146 - 2147 12149 - 2150 12153 - 2154 12156 - 2166 12168 - 2173 12175 12177 12179 12181 - 2182 12184 12186 12190 - 2191 12193 - 2195 12197 - 2198 12200 12202 - 2203 12205 12207 12209 - 2213 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 19, 2019 MD90-57A031 10 of 34 BOEING SERVICE BULLETIN MD90-57A031
ALERTALERT
GroupFuselage Number 12215 - 2217 12219 - 2233 12235 - 2238 12240 12242 - 2243 12245 - 2246 12248 12250 - 2251 12253 12255 - 2263 12288 - 2290 14001 - 4002
2. Spares Affected None.
B. Concurrent Requirements None.
C. Reason Accomplishment of this service bulletin will make sure any crack on the left and right center wing lower skins and stringers at the fastener holes common to Stringers 11 through 22 and around the external bracket angle at Stringers 18 and 19 is found. If this service bulletin is not done, undetected fatigue cracks may result in the inability of the structure to sustain limit loads, which could adversely affect the structural integrity of the airplane.
The MD-90 center wing stringers and skins have been identified to potentially be susceptible to cracking, based on MD-80 service experience. MD-80 and MD-90 wings share the same basic design and have similar stresses. MD-80 operators have reported finding cracks in the center wing lower stringers, lower stringer end fittings, and lower forward and aft skins. The cracks in stringers occur at the inboard end where they are joined to the aircraft centerline by end fittings. Cracks in the end fittings occur at the outboard end where they attach to stringers. The wing skin cracks occur underneath a cracked stringer.
The cause of the cracks has been determined to be from fatigue. The Boeing Company has not received any reports of cracks on MD90 airplanes.
Boeing Service Related Problem (SRP) MD90-SRP-57-0312 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) MD-90 FTD 57-17001 is related to this service bulletin.
Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 19, 2019 MD90-57A031 11 of 34 BOEING SERVICE BULLETIN MD90-57A031
ALERTALERT
D. Description Get access to the left and right center wing lower skins, stringers S-11 thru S-22 between Xcw=0 and Xcw=20 under the wing/fuselage fillet panels. Do an Eddy Current, Low Frequency (ETLF) inspection of the left and right side fastener holes common to stringers 11 thru 22 and the forward and aft skins for any crack and do an Eddy Current, High Frequency (ETHF) inspection of the lower skin at stringers 18 thru 20 for any crack. If any crack is found, contact The Boeing Company for repair instructions and do the repair; and repeat the inspections for any crack in the unrepaired area. If no crack is found, repeat the inspections for any crack.
The work in this service bulletin is done in the maintenance zone(s) given below.
Affected Maintenance Zones ZoneModel 151, 161MD-90-30 E. Compliance The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory.
Accomplish the required actions, based on the applicable conditions in Table 1, in accordance with Paragraph 3. 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 or an OPTION, do all of the ACTION numbers for that CONDITION or OPTION.
A logic diagram showing compliance tasks and compliance times is included as an aid in APPENDIX A.
Table 1: Eddy Current, Low Frequency (ETLF) and Eddy Current, High Frequency (ETHF) Inspections of Left and Right Center Wing Lower Skins and Stringers Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition -Within 3,500 flight cycles after the original issue date of this service bulletin.
Before 29,000 total flight cycles.
Do an Eddy Current, Low Frequency (ETLF) inspection of the left and right side fastener holes common to stringers 11 thru 22 and the forward and aft skins for any crack and do an Eddy Current, High Frequency (ETHF) inspection of the lower skin at stringers 18 thru 20 for any crack.
All Airplanes Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 19, 2019 MD90-57A031 12 of 34 BOEING SERVICE BULLETIN MD90-57A031