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This text is OCR from a scan. OCR can misread letters and numbers. © Aviation Partners Boeing. Filed by the FAA in regulations.gov docket FAA-2019-0323; AD 2019-22-06 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
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AVIATION PARTNERS BOEING SERVICE BULLETIN 2811 S 102nd Street, Suite 200 Seattle, WA 98168
(206) 830-7699 NUMBER: AP737-57-020 Original Issue: April 5, 2018 ATA SYSTEM: 5720 SUBJECT: WINGS - Stringer U-14 Reinforcement Interference with FQIS Tank Unit at Rib 21, Left Hand
PROPRIETARY NOTICE The data contained hereon and herein is proprietary to Aviation Partners Boeing. Neither this data nor the data contained herein shall be reproduced, used or disclosed to others without the written authorization of Aviation Partners Boeing.
EXPORT CONTROLLED TECHNOLOGY This document contains information about a technology controlled by the Export Administration Regulations (EAR) (15 CFR 730-774). It has been classified under Export Control Classification Number (ECCN) 9E991 and may not be exported to certain countries without a license. Providing this information to a foreign national - inside or outside the United States - can constitute a prohibited export. Each person handling this document has a legal responsibility to comply with all applicable EAR requirements and should consult with an Export Control Officer before providing it to any foreign national.
Original Issue: April 5, 2018 AP737-57-020 Page 1 of 17
AVIATION PARTNERS BOEING SERVICE BULLETIN AP737-57-020
APB DOCUMENT FEEDBACK FORM To provide feedback on this document to APB for corrections or improvements, please complete the form below and fax or email to the attention of APB Liaison Engineering at:
Fax: +1 (206) 767-0535 Email: _leng@aviationpartners.com Airline Name:
Contact Name:
Phone Number:
Email Address:
Airplane Model-Type:
Document Number:
Document Revision:
Document Title:
Chapter-Section-Subject:
Page:
Page Date:
Description of Change:
(Include additional sheets as required) Attachments:
Original Issue: April 5, 2018 AP737-57-020 Page 2 of 17 Aviation Partners Boeing Proprietary
AVIATION PARTNERS BOEING SERVICE BULLETIN AP737-57-020 Table of Contents
SUMMARY
1. PLANNING INFORMATION .6 A. Effectivity .
1. Airplanes .6
2. Spares Affected .
B. Concurrent Requirements
c. Reason D Description E Compliance.
Approval 8 G Warranty Information .9 H. Manpower. .9 Weight and Balance Changes 10 J. Electrical Load Data 10 K References 10
1. Existing Data:. 10
2. Data Supplied with This Service Bulletin: 10
3. Installation Drawings Used in the Preparation of This Service Bulletin: 10 L Other Publications Affected 10 M. Interchangeability and Intermixability of Parts 10 N. Software Accomplishment Summary.. 10
2. MATERIAL INFORMATION A Material - Price and Availability B Parts Necessary for Each Airplane 11
1. Kits/Parts .. 11
2. Parts and Materials Supplied by the Operator: 11 C. Parts Necessary to Change Spares ... 11 D. Existing Parts Accountability 11 E. Special Tooling - Price and Availability. 11 F Special Tooling Necessary to Do This Service Bulletin 11
3. ACCOMPLISHMENT INSTRUCTIONS. 12 A. General Notes.. 12 B. Work Instructions 13 PART 1: INSPECTION OF FQIS TANK UNIT CLEARANCE TO STRINGER U-14 REINFORCEMENT ATT RIB 21, LEFT HAND... 13 PART 2: REPAIR/TERMINATING ACTION - TRIM STRINGER U-14 REINFORCEMENT TO PROVIDE CLEARANCE TO FQIS TANK UNIT. 13 PART 3: PUT THE AIRPLANE BACK TO A SERVICEABLE CONDITION 14 FIGURE 1: WING LOWER SURFACE 15 FIGURE 2: FQIS TANK UNIT No. 12 INSTALLATION AT RIB 21 16 Original Issue: April 5, 2018 AP737-57-020 Page 3 of 17 Aviation Partners Boeing Proprietary
AVIATION PARTNERS BOEING SERVICE BULLETIN AP737-57-020 NUMBER: AP737-57-020 SUMMARY Original Issue: April 5, 2018 ATA SYSTEM: 5720 SUBJECT: WINGS - Stringer U-14 Reinforcement Interference with FQIS Tank Unit at Rib 21, Left Hand
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.
CONCURRENT REQUIREMENTS None
BACKGROUND This service bulletin is sent to provide instructions to inspect for clearance between the Fuel Quantity Indicating System (FQIS) tank unit 12 at Rib 21 (WSTA 617) and the Stringer U-14 reinforcement Angle in the left hand wing. If the work given in this service bulletin is not done, the FQIS installation potentially would not be in conformance with 28-AWL-30 CDCCL requirements.
One operator has reported finding insufficient clearance on two aircraft during 737-800-7 Split Scimitar Winglet modifications.
APB resolved both discrepant conditions by providing instructions to trim the free flange of the reinforcement angle to obtain minimum 0.10 inch clearance to the FQIS tank unit 12. The Materiel Review Report (MRR) repair dispositions met the 28-AWL-30 CDCCL requirement which states the gap between the side of the tank unit and tank structure must be 0.10 inch or more.
This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
Planning Data Affected Reference Spares Affected No Paragraph 1.A.2., Spares Affected AD Related No Paragraph 1.E., Compliance and Paragraph
1.F., Approval Weight and Balance Change No Paragraph 1.l., Weight and Balance Changes Electrical Load Changed Publications Affected Airplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Airplane Flight Manual) No Paragraph 1.J., Electrical Load Data No Paragraph 1.L., Publications Affected No Paragraph 1.L., Publications Affected Kits/Parts Required No Paragraph 2.B.1., Kits/Parts Operator Supplied Parts/Material Yes Paragraph 2.B.2., Parts and Materials Supplied by the Operator Special Tooling Required No Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin Original Issue: April 5, 2018 AP737-57-020 Page 4 of 17 Aviation Partners Boeing Proprietary
AVIATION PARTNERS BOEING SERVICE BULLETIN AP737-57-020 ACTION Get access to the inboard side of Rib 21 (WSTA 617) on the left hand wing. Measure the clearance between the FQIS tank unit and the Stringer U-14 reinforcement angle. If the clearance is less than 0.10 inches, trim away the lower flange of the reinforcement angle to provide clearance and restore the airplane to a serviceable condition. If clearance is 0.10 inches or greater, no further rework is necessary. Paragraph 1.E., Compliance contains compliance times for the inspection and rework.
EFFECTIVITY 737-800 Airplanes from line number 4919 to 5063, modified to receive Split Scimitar Winglets (SSW), with Blended or Split Scimitar Winglets installed (Refer to STC ST00830SE). Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplane(s).
COMPLIANCE Refer to Paragraph 1.E., Compliance Recommendation.
INDUSTRY SUPPORT INFORMATION None.
MANPOWER Refer to Paragraph 1.H., Manpower.
MATERIAL INFORMATION None.
Original Issue: April 5, 2018 AP737-57-020 Page 5 of 17 Aviation Partners Boeing Proprietary
AVIATION PARTNERS BOEING SERVICE BULLETIN AP737-57-020 NUMBER: AP737-57-020 Original Issue: April 5, 2018 ATA SYSTEM: 5720 SUBJECT: WINGS - Stringer U-14 Reinforcement Interference with FQIS Tank Unit at Rib 21, Left Hand
1. PLANNING INFORMATION A. Effectivity
1. Airplanes This service bulletin is applicable to 737-800 Airplanes modified to receive Split Scimitar Winglets (SSW), with Blended or Split Scimitar Winglets installed as listed below (Refer to STC ST00830SE).
An equivalent change is on subsequent production airplanes.
Line Number Variable Number Serial Number 4928 YS655 42385 4935 YS656 60082 4942 YS657 36905 4949 YS277 39944 4953 YQ508 39076 4955 YS658 42522 4956 YS357 41445 4962 YS659 60083 4967 YS660 36898 4970 YQ509 39075 4974 YS661 42523 4975 YS358 41446 4989 YS278 39945 4999 YS663 60086 5001 YS664 60084 5011 YS665 60085 5014 YS359 44155 5022 YS666 42525 5030 YS667 42524 5032 YS668 35973 5038 YS669 36907 5042 YS670 36935 5044 YS671 42528 5045 YS279 36707 5059 YS360 44156 Original Issue: April 5, 2018 AP737-57-020 Page 6 of 17 Aviation Partners Boeing Proprietary
AVIATION PARTNERS BOEING SERVICE BULLETIN AP737-57-020
2. Spares Affected None B. Concurrent Requirements None C. Reason This service bulletin gives instructions to inspect the Stringer U-14 reinforcement installation at Rib 21 on the left hand wing to verify that there is sufficient clearance to the FQIS tank unit number 12.
If the clearance is less than required minimum, this service bulletin gives instructions to modify the Stringer U-14 reinforcement angle to provide the required clearance.
If not corrected, the FQIS installation at this location would not be in compliance with 28-AWL-30 CDCCL.
An operator reported the first nonconformance during a 737-800-7 Split Scimitar Winglet modification.
The nonconformance involved the FQIS tank unit number 12 contacting the U-14 reinforcement angle.
The same operator reported another nonconformance on a second aircraft, which involved the FQIS tank unit number 12 clearing the U-14 reinforcement angle by 0.05 inch.
APB resolved both discrepant conditions by providing instructions to trim the free flange of the reinforcement angle to obtain minimum 0.10 inch clearance to the FQIS tank unit number 12. The MRR dispositions met the 28-AWL-30 CDCCL requirement, which states the gap between the side of the tank unit, and tank structure is 0.10 inch or more.
D. Description This service bulletin gives instructions to do the following.
• Inspect the Stringer U-14 reinforcement installation at Rib 21 on the left hand wing to verify that there is enough clearance to the FQIS tank unit number 12.
• Trim the Stringer U-14 detail adjacent to the FQIS tank unit at Rib 21 to provide the necessary clearance.
The work in this service bulletin is done in the maintenance zone(s) given below.
Affected Maintenance Zones Model Zone 737-800 532 Original Issue: April 5, 2018 AP737-57-020 Page 7 of 17 Aviation Partners Boeing Proprietary
AVIATION PARTNERS BOEING SERVICE BULLETIN AP737-57-020 E. Compliance Aviation Partners Boeing recommends doing the inspection within 18 months after the original issue of this Service Bulletin.
Do the required actions in accordance with Paragraph 3. Accomplishment Instructions.
Condition Action Compliance Time (Whichever Occurs Later) All airplanes Do PART 1: Within 18 months after the original issue date of this Inspection Of FQIS Service Bulletin.
Tank Unit Clearance To Stringer U-14 Reinforcement At Rib 21, Left Hand Condition 1: Do PART 3: Return Before further flight Measured clearance the Aircraft to Serviceable is 0.10 inches or Condition greater Condition 2: Do PART 2: Trim Before further flight Stringer U-14 is less than 0.10 Measured clearance Provide Clearance Reinforcement To inches. To FQIS Tank Unit Do PART 3: Return the Aircraft to Service Condition F. Approval This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this service bulletin comply with the applicable regulations and are FAA approved, as well as European Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on the airplane being in its original Boeing delivery configuration when the SSW modification was performed.
If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this service bulletin.
The changes given in this Service Bulletin are in compliance with the Airworthiness Limitation 28-AWL-
30. This service bulletin has been reviewed by the FAA Oversight Office for fuel tank ignition prevention requirements and was found that the repair and modification maintain an acceptable level of safety. No further approval from the FAA Oversight Office is required to satisfy the requirements of Boeing 737 MPD D626A0010-9-04 CDCCL 28-AWL-30 provided the repair and modification are accomplished in accordance with the instructions in this service bulletin.
Original Issue: April 5, 2018 AP737-57-020 Page 8 of 17 Aviation Partners Boeing Proprietary
AVIATION PARTNERS BOEING SERVICE BULLETIN AP737-57-020 G. Warranty Information APB warranty reimbursement of labor and material costs is available for eligible airplanes. Please refer to Paragraphs 1.H and 2.A.
H. Manpower The table below shows an estimate of the task hours necessary to do this inspection for each airplane.
This estimate is for direct labor only, done by an experienced crew. Adjust the estimate with operator task hour data if necessary. The estimate does not include lost time. These are some examples of lost time:
• Time to adjust to the workplace
• Time to schedule the work
• Time to inspect the work Time to cure the materials
• Time to make the parts
• Time to find the tools.
APB will reimburse labor costs, based on the actual work performed. Total reimbursement will not exceed the sum of hours from the table below. The labor rate will be in accordance with the APB Winglet Sales agreement for the affected airplanes, if specified. If not otherwise specified, the labor rate will be the reported actual rate if it is fair and reasonable.
Submit claims to APB Warranty (apbwarranty@aviationpartners.com) with supporting data, including airplanes line number, work instruction Parts accomplished, total labor hours, labor rate, and total dollar amount per airplane.
Task Number of Persons Man-Hours Elapsed Time (Hours) Defuel and Purge 2 4 2 Tank - L/H Open Fuel Cell 2 1 .5 Access Panels Inspection 1 .25 .25 Remove Tank Unit 1 .25 .25 for Access Repair 1 2 2 Reinstall Tank Unit 1 Test Tank Unit 2 1 .5 Close Fuel Cell 2 1 .5 Access Panels Fuel Leak Check 1 .5 .5 TOTAL FOR EACH AIRPLANE 10.5 7 Return aircraft to Service condition Original Issue: April 5, 2018 AP737-57-020 Page 9 of 17 Aviation Partners Boeing Proprietary
AVIATION PARTNERS BOEING SERVICE BULLETIN AP737-57-020
1. Weight and Balance Changes None J. Electrical Load Data None K. References
1. Existing Data:
a. D633A101 Boeing 737-600/700/800/900 Aircraft Maintenance Manual (AMM).
b. D634T210 Boeing 737-800 Structural Repair Manual (SRM).
c. Boeing Standard Overhaul Practice Manual (SOPM).
d. D626A001 Boeing 737-600/700/800/900 Maintenance Planning Document (MPD)
2. Data Supplied with This Service Bulletin:
None.
3. Installation Drawings Used in the Preparation of This Service Bulletin:
Drawing Number Title 737-8360 Modification Insti - Str U-14 Reinforcement, Upper, Fwd, Inbd This drawing was used to prepare this service bulletin. This drawing is not necessary to make the specified changes, and is not supplied with this service bulletin. This drawing may not be applicable to all airplane configurations or operators.
L. Other Publications Affected
1. None
2. Aviation Partners Boeing has evaluated the repairs and/or changes in this service bulletin for effects on Fatigue Critical Structure (FCS) and for changes to Damage Tolerance Inspections (DTI) required in the Maintenance Program. This service bulletin affects FCS, but no new DTIs are necessary.
M. Interchangeability and Intermixability of Parts See Paragraph 2.D. Existing Parts Accountability.
N. Software Accomplishment Summary None Original Issue: April 5, 2018 AP737-57-020 Page 10 of 17 Aviation Partners Boeing Proprietary
AVIATION PARTNERS BOEING SERVICE BULLETIN AP737-57-020
2. MATERIAL INFORMATION A. Material - Price and Availability Not Applicable.
B. Parts Necessary for Each Airplane
1. Kits/Parts None.
2. Parts and Materials Supplied by the Operator:
Material Description QTY QTY per Wing per SS BMS10-20 Type I| Primer Bonderite M-CR 600 Aero Surface Treatment (formerly Alodine 600) * Quantity as required.
C. Parts Necessary to Change Spares None D. Existing Parts Accountability None.
E. Special Tooling - Price and Availability No special tooling is required to do repairs.
F. Special Tooling Necessary to Do This Service Bulletin Maintenance and overhaul tools as specified in the maintenance manuals may be necessary. Examine operator tool supply before starting work to make sure all necessary tools are available.
Original Issue: April 5, 2018 AP737-57-020 Page 11 of 17 Aviation Partners Boeing Proprietary
AVIATION PARTNERS BOEING SERVICE BULLETIN AP737-57-020
3. ACCOMPLISHMENT INSTRUCTIONS A. General Notes WARNING: 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: CAREFULLY DO ALL OF THE SAFETY PROCEDURES IN THE PURGING AND ENTRY PROCEDURE OF THE FUEL TANK. INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
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: ELECTRICALLY GROUND THE AIRPLANE. THIS WILL HELP TO PREVENT DAMAGE TO THE AIRPLANE OR EQUIPMENT.
NOTE: 1. Obey all warnings and cautions given in the applicable sections of the Aircraft Maintenance Manual (AMM).
2. Do functional tests and adjustments prior to returning the aircraft to service.
3. 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.
Torque limits to tighten nut and bolts are given in the 737 SRM, 51-40-04.
4. Make an entry into aircraft maintenance records once service bulletin is completed.
5. For approved material and process substitutions, refer to the 737 SRM, Chapter 51 or Boeing drawing 65-88700.
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 document must be used.
7. 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 obeyed.
8. Use of colors in Figures is based on guidance from the ATA e-Business Program (ATA) S1000D.
9. The compliance times for the actions in Paragraph 3.B., Work Instructions are in Paragraph
1.E., Compliance.
Original Issue: April 5, 2018 AP737-57-020 Page 12 of 17 Aviation Partners Boeing Proprietary