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Commercial Airplanes MD90 Service Bulletin ALERT Number: MD90-55A018 Original Issue: June 29, 2016 ATA System: 5510 SUBJECT: STABILIZERS - Horizontal Stabilizer - Rear Spar Upper Cap Inspection, Repair, and 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:
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET Copyright © 2016 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Unpublished Work.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: June 29, 2016 MD90-55A018 1 of 53
3.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: June 29, 2016 MD90-55A018 2 of 53 BOEING SERVICE BULLETIN MD90-55A018
ALERTALERT
BLANK PAGE
Table of Contents
Summary5
1. PLANNING INFORMATION9
A. Effectivity9
1. Airplanes9
2. Spares Affected11
B. Concurrent Requirements11
C. Reason11
D. Description11
E. Compliance12
F. Approval15
G. Manpower16
H. Weight and Balance Changes17
I. Electrical Load Data18
J. References18
1. Existing Data:18
2. Data Supplied with this Service Bulletin:18
3. Installation Drawings Used in the Preparation of this Service Bulletin:19
K. Publications Affected19
L. Interchangeability and Intermixability of Parts19
M. Software Accomplishment Summary19
2. MATERIAL INFORMATION21
A. Material - Price and Availability21
B. Industry Support Information21
C. Parts Necessary for Each Airplane21
1. Kits/Parts21
2. Parts and Materials Supplied by the Operator26
3. Parts Modified and Reidentified28
4. Parts Removed and Not Replaced28
D. Parts Necessary to Change Spares28
E. Special Tooling - Price and Availability28
F. Special Tooling Necessary to do this Service Bulletin28
3. ACCOMPLISHMENT INSTRUCTIONS29
A. GENERAL INFORMATION29
B. WORK INSTRUCTIONS31
FIGURE 1: LEFT SIDE HORIZONTAL STABILIZER REAR SPAR UPPER CAP OPEN HOLE EDDY
CURRENT HIGH FREQUENCY (ETHF) INSPECTION36
FIGURE 2: RIGHT SIDE HORIZONTAL STABILIZER REAR SPAR UPPER CAP OPEN HOLE EDDY
CURRENT HIGH FREQUENCY (ETHF) INSPECTION38
FIGURE 3: LEFT SIDE HORIZONTAL STABILIZER REAR SPAR UPPER CAP SURFACE EDDY CURRENT
LOW FREQUENCY (ETLF) INSPECTION40
FIGURE 4: RIGHT SIDE HORIZONTAL STABILIZER REAR SPAR UPPER CAP SURFACE EDDY
CURRENT LOW FREQUENCY (ETLF) INSPECTION42
APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 1: LEFT SIDE HORIZONTAL
STABILIZER REAR SPAR UPPER CAP - OPEN HOLE ETHF OR SURFACE ETLF INSPECTION
.44
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: June 29, 2016 MD90-55A018 3 of 53 BOEING SERVICE BULLETIN MD90-55A018
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APPENDIX B: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 2: RIGHT SIDE HORIZONTAL
STABILIZER REAR SPAR UPPER CAP - OPEN HOLE ETHF OR SURFACE ETLF INSPECTION
.46
APPENDIX C: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 3: POST LEFT SIDE
HORIZONTAL STABILIZER REAR SPAR UPPER CAP SPLICE REPAIR OR REPLACEMENT
- OPEN HOLE ETHF OR SURFACE ETLF INSPECTION48
APPENDIX D: LOGIC DIAGRAM FOR PARAGRAPH 1.E. COMPLIANCE: TABLE 4: POST RIGHT SIDE
HORIZONTAL STABILIZER REAR SPAR UPPER CAP SPLICE REPAIR OR REPLACEMENT
- OPEN HOLE ETHF OR SURFACE ETLF INSPECTION50
APPENDIX E: SIGNAL INDICATIONS FOR AUTOMATED SCAN PROCEDURES52
APPENDIX F: PART DEMAND INTENT53
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: June 29, 2016 MD90-55A018 4 of 53 BOEING SERVICE BULLETIN MD90-55A018
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Commercial Airplanes MD90 Service Bulletin ALERT SummaryNumber: MD90-55A018Original Issue: June 29, 2016 ATA System: 5510 SUBJECT: STABILIZERS - Horizontal Stabilizer - Rear Spar Upper Cap Inspection, Repair, and 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.
CONCURRENT REQUIREMENTS None.
BACKGROUND This service bulletin gives instructions to inspect for cracking in the horizontal stabilizer rear spar upper cap fastener hole at station XE = +/-5.931 and gives subsequent corrective action if any crack is found. If this service bulletin is not done, such cracks can grow to critical length before being found and could adversely affect the structural integrity of the airplane.
Service Bulletin MD90-55A012 does an inspection for cracks in the horizontal stabilizer rear spar upper cap fastener hole at station XE = +/-5.931, but only as a conditional inspection to cracks being found in the upper aft skin panels. Therefore, it is not guaranteed that cracks in the fastener holes at station XE = +/-5.931 are detected before they reach critical length. There has been one report of cracking in an MD-90 horizontal stabilizer rear spar cap at this location. The cause of the cracking is due to fatigue. The affected airplane had accumulated 36,588 flight-hours and 24,975 landing cycles.
Boeing Service Related Problem (SRP) MD90-SRP-55-0067 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) MD-90 FTD 55-07001 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 ChangesYesWeight and Balance Change Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: June 29, 2016 MD90-55A018 5 of 53
ReferenceAffectedPlanning Data Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedYesPublications 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/PartsYesKits/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 Do an open hole Eddy Current High Frequency (ETHF) or surface Eddy Current Low Frequency (ETLF) inspection for any crack in the left and right side horizontal stabilizer rear spar upper caps common to the elevator hinge fitting at XE = +/-5.931. If no crack is found, repeat open hole ETHF or surface ETLF inspection for any crack.
If any crack is found, do a horizontal stabilizer rear spar upper cap splice repair or replacement.
EFFECTIVITY All MD-90-30 Airplanes. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes.
COMPLIANCE Federal Aviation Administration (FAA) Airworthiness Directives AD 2009-13-08 and AD 2014-24-03 are related to this service bulletin. The effective date of AD 2009-13-08 is August 3, 2009. The effective date of AD 2014-24-03 is January 27, 2015.
The Federal Aviation Administration (FAA) will possibly release an additional 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 inspections and/or repair procedures given in this service bulletin.
MANPOWER Refer to Paragraph 1.G., Manpower.
MATERIAL INFORMATION Boeing Supplied Kits/Parts.
Refer to Paragraph 2.A., Material - Price and Availability.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: June 29, 2016 MD90-55A018 6 of 53 BOEING SERVICE BULLETIN MD90-55A018
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Operators are encouraged to complete the survey provided in APPENDIX F of this service bulletin to help Boeing predict the quantity and timing of the Boeing Supplied Kits/Parts.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: June 29, 2016 MD90-55A018 7 of 53 BOEING SERVICE BULLETIN MD90-55A018
ALERTALERT
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: June 29, 2016 MD90-55A018 8 of 53 BOEING SERVICE BULLETIN MD90-55A018
ALERTALERT
BLANK PAGE
Commercial Airplanes MD90 Service Bulletin ALERT Number: MD90-55A018 Original Issue: June 29, 2016 ATA System: 5510 SUBJECT: STABILIZERS - Horizontal Stabilizer - Rear Spar Upper Cap Inspection, Repair, and 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.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes This service bulletin is for the airplanes shown below.
DESCRIPTIONCONFIGURATIONGROUP All MD-90-30 Airplanes-1 Airplane Models:
MD-90-30 GroupFuselage Number 12018 12094 - 2099 12100 12115 12117 12120 12122 - 2123 12125 - 2126 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: June 29, 2016 MD90-55A018 9 of 53
GroupFuselage Number 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 12215 - 2217 12219 - 2233 12235 - 2238 12240 12242 - 2243 12245 - 2246 12248 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: June 29, 2016 MD90-55A018 10 of 53 BOEING SERVICE BULLETIN MD90-55A018
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GroupFuselage Number 12250 - 2251 12253 12255 - 2263 12288 - 2290 14001 - 4002
2. Spares Affected None.
B. Concurrent Requirements None.
C. Reason This service bulletin gives instructions to inspect for cracking in the horizontal stabilizer rear spar upper cap fastener hole at station XE = +/-5.931 and gives subsequent corrective action if any crack is found.
If this service bulletin is not done, such cracks can grow to critical length before being found and could adversely affect the structural integrity of the airplane.
Service Bulletin MD90-55A012 does an inspection for cracks in the horizontal stabilizer rear spar upper cap fastener hole at station XE = +/-5.931, but only as a conditional inspection to cracks being found in the upper aft skin panels. Therefore, it is not guaranteed that cracks in the fastener holes at station XE = +/-5.931 are detected before they reach critical length. There has been one report of cracking in an MD-90 horizontal stabilizer rear spar cap at this location. The cause of the cracking is due to fatigue.
The affected airplane had accumulated 36,588 flight-hours and 24,975 landing cycles.
Boeing Service Related Problem (SRP) MD90-SRP-55-0067 is related to this service bulletin.
Boeing Fleet Team Digest (FTD) MD-90 FTD 55-07001 is related to this service bulletin.
D. Description Do an open hole Eddy Current High Frequency (ETHF) or surface Eddy Current Low Frequency (ETLF) inspection for any crack in the left and right side horizontal stabilizer rear spar upper caps common to the elevator hinge fitting at XE = +/-5.931. If no crack is found, repeat open hole ETHF or surface ETLF inspection for any crack. If any crack is found, do a horizontal stabilizer rear spar upper cap splice repair or replacement.
The work in this service bulletin is done in the maintenance zone(s) given below.
Affected Maintenance Zones ZoneModel 333, 343MD-90-30 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: June 29, 2016 MD90-55A018 11 of 53 BOEING SERVICE BULLETIN MD90-55A018
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E. Compliance Federal Aviation Administration (FAA) Airworthiness Directives AD 2009-13-08 and AD 2014-24-03 are related to this service bulletin. The effective date of AD 2009-13-08 is August 3, 2009. The effective date of AD 2014-24-03 is January 27, 2015.
The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory.
Do the required actions 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 number or an OPTION number, do all of the ACTION numbers for that CONDITION number or OPTION number.
Logic diagrams showing compliance tasks and compliance times are included as an aid in APPENDIX A through APPENDIX D.
The table that follows immediately below describes the service bulletin PARTS noted in the compliance table.
DescriptionTitle
LEFT SIDE HORIZONTAL STABILIZER REAR SPAR UPPER CAP OPEN HOLE EDDY
CURRENT HIGH FREQUENCY (ETHF) OR SURFACE EDDY CURRENT LOW FRE-
QUENCY (ETLF) INSPECTION PART 1
RIGHT SIDE HORIZONTAL STABILIZER REAR SPAR UPPER CAP OPEN HOLE EDDY
CURRENT HIGH FREQUENCY (ETHF) OR SURFACE EDDY CURRENT LOW FRE-
QUENCY (ETLF) INSPECTION PART 2 Table 1: Left Side Horizontal Stabilizer Rear Spar Upper Cap - Open Hole ETHF or Surface ETLF Inspection Repeat Interval (Not to Exceed) Compliance Time (Whichever Occurs Later) ActionCondition -Within 4,050 flight cycles after the original issue date of this service bulletin.
Before 20,000 total flight cycles.
Do PART 1, OPTION 1:
OPEN HOLE ETHF IN- SPECTION or OPTION 2: SURFACE ETLF IN- SPECTION for any crack.
All Airplanes --Before further flight.
OPTION 3:
Do a horizontal stabilizer rear spar upper cap splice repair. (a) CONDITION 1: ANY
CRACK FOUND --Before further flight.
OPTION 4:
Do a horizontal stabilizer rear spar upper cap replacement. (a) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: June 29, 2016 MD90-55A018 12 of 53 BOEING SERVICE BULLETIN MD90-55A018