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Commercial Airplanes MD11 Requirements Bulletin ALERT Number: MD11-53A088 RB Original Issue: March 06, 2020 ATA System: 5314 SUBJECT: FUSELAGE - Center Fuselage Main Frame - Overwing Floor Beams - 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:
Copyright © 2020 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Unpublished Work.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.
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3.0
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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 d6
2. CONCURRENT REQUIREMENTS6
3 . C O M P L I A N C E6
4. APPROVAL8
5. ACCOMPLISHMENT INSTRUCTIONS9
A. General Information9
B. Work Instructions ........................................... 1 0 FIGURE 1: LEFT SIDE - GENERAL VISUAL INSPECTION OF THE OVERWING FLOOR BEAMS . . 14 FIGURE 2: RIGHT SIDE - GENERAL VISUAL INSPECTION OF THE OVERWING FLOOR BEAMS . 16 FIGURE 3: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECT ION OF THE OVERWING FLOOR BEAMS ........................................ 1 8 FIGURE 4: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING FLOOR BEAMS ........................................ 2 8 FIGURE 5: LEFT SIDE - DETAILED INSPECTION OF OVERWING FLOOR BEAM SUPPORTS . . . 38 FIGURE 6: RIGHT SIDE - DETAILED INSPECTION OF OVERWING FLOOR BEA M SUPPORTS . . 41 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Commercial Airplanes MD11 Requirements Bulletin ALERT Number: MD11-53A088 RB Original Issue: March 06, 2020 ATA System: 5314 SUBJECT: FUSELAGE - Center Fuselage Main Frame - Overwing Floor Beams - 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 MD-11, MD-11F Airplane(s), line number(s) 447-646 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.
DESCRIPTIONCONFIGURATIONGROUP All MD-11 and MD-11F-1 Airplane Models:
MD-11, MD-11F GroupFuselage Number 1447 - 449 1450 - 459 1460 - 469 1470 - 479 1480 - 489 1490 - 499 1500 - 509 GroupFuselage Number 1510 - 519 1520 - 529 1530 - 539 1540 - 549 1550 - 559 1560 - 569 1570 - 579 GroupFuselage Number 1580 - 589 1590 - 599 1600 - 609 1610 - 619 1620 - 629 1630 - 639 1640 - 646 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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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 MD11-53A088 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin MD11-53A088 RB mandatory.
Accomplish the required action(s), based on the applicable condition(s) in Table 1, 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 or an OPTION, do all of the ACTION numbers for that CONDITION or OPTION.
Table 1: ETHF Inspection of the Overwing Floor Beams and Detailed Inspection of the Overwing Floor Beam Supports, Left and Right Sides Repeat Interval (Not to Exceed, Whichever Occurs First) Compliance Time (Whichever Occurs Later) ActionCondition -Within 1,990 flight cycles or within 27 months, after the original issue date of Requirements Bulletin MD11- 53A088 RB, whichever occurs first.
Before 20,000 total flight cycles.
Do a General Visual Inspection of the overwing floor beams for any repair.
ALL AIR- PLANES Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
Original Issue: March 06, 2020 MD11-53A088 RB 6 of 43 REQUIREMENTS BULLETIN MD11-53A088
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Table 1: ETHF Inspection of the Overwing Floor Beams and Detailed Inspection of the Overwing Floor Beam Supports, Left and Right Sides Repeat Interval (Not to Exceed, Whichever Occurs First) Compliance Time (Whichever Occurs Later) ActionCondition -Before further flight.CONDITION 1 (ACTION 1):
Contact The Boeing Company for alternative inspection(s) to Requirements Bulletin MD11- 53A088 RB, incorporate the inspection(s) into the maintenance programs and do the inspection(s) at the times specified by Boeing.
CONDITION 1:
ANY REPAIR FOUND -Before further flight.CONDITION 1 (ACTION 2):
Do Detailed Inspections of the overwing floor beam supports and ETHF Inspections of the overwing floor beams at any unrepaired areas, for any crack.
-Before further flight.CONDITION 1.1 (ACTION 1):
Contact The Boeing Company for repair instructions and do the repair.
CONDITION 1.1:
ANY CRACK FOUND 3060 Flight Cycles or 64 months.
-CONDITION 1.1 (ACTION 2):
Repeat Detailed Inspections of the overwing floor beam supports and ETHF Inspections of the overwing floor beams at any unrepaired areas, for any crack. (a) 3060 Flight Cycles or 64 months.
-Repeat Detailed Inspections of the overwing floor beam supports and ETHF Inspections of the overwing floor beams at any unrepaired areas, for any crack. (a) CONDITION 1.2:
NO CRACK FOUND -Before further flight.Do Detailed Inspections of the overwing floor beam supports and ETHF Inspections of the overwing floor beams for any crack.
CONDITION 2:
NO REPAIR FOUND Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Table 1: ETHF Inspection of the Overwing Floor Beams and Detailed Inspection of the Overwing Floor Beam Supports, Left and Right Sides Repeat Interval (Not to Exceed, Whichever Occurs First) Compliance Time (Whichever Occurs Later) ActionCondition -Before further flight.CONDITION 2.1 (ACTION 1):
Contact The Boeing Company for repair instructions and do the repair.
CONDITION 2.1:
ANY CRACK FOUND 3060 Flight Cycles or 64 months.
-CONDITION 2.1 (ACTION 2):
Repeat Detailed Inspections of the overwing floor beam supports and ETHF Inspections of the overwing floor beams for any crack. (a) 3060 Flight Cycles or 64 months.
-Repeat Detailed Inspections of the overwing floor beam supports and ETHF Inspections of the overwing floor beams for any crack. (a) CONDITION 2.2:
NO CRACK FOUND
(a) It is not required to do the inspections in Requirements Bulletin MD11-53A088 RB in areas where a repair covers the affected inspection zone provided that:
1. The repair is the corrective action to the crack condition identified while performing Requirements Bulletin MD11-53A088 RB and installed after the original issue date of Requirements Bulletin MD11-53A088 RB, AND
2. The installed repair was approved by the Boeing Organization Designation Authorization (ODA) via a FAA Form 8100-9.
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, 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 document and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other Boeing changes.
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.
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5. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION NOTE: 1. This is an Enhanced Required for Compliance document. There w ill 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 Boe ing 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.
5. 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 – Hole dimensions for standard solid rivets are in and fasteners are in Structural Repair Manual (SRM) Chapter 51 – Torque Values:
— Values for structural fasteners are given in MD11 Structural Repair Manual, Chapter 51.
— Values for airframe maintenance tasks are included in Chapter 20 of MD11 Aircraft Maintenance Manual (AMM).
— Values for electrical maintenance tasks are included in Chapte r 20 of Standard Wiring Practices Manual (SWPM).
— Values for engine maintenance tasks are included in Chapter 70 of MD11 Aircraft Maintenance Manual (AMM).
— Non-standard torque values for maintenance tasks are included in the applicable installation step.
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7. A Detailed Inspection is defined as: An intensive examination of a specific item, installation or assembly to detect damage, failure or irregularity. This could include tactile assessment in which a component or assembly can be checked for tightness/security. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirrors and magnifying lenses may be necessary. Surface cleaning and elaborate access procedures may be required.
8. A General Visual Inspection is defined as: A visual examinati on of an interior or exterior area, installation or assembly to detect obvious damage, failure or irregularity.
This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to enhance visual access to all exposed surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight or drop-light and may require removal or opening of access panels or doors. Stands, ladders or platforms may be required to gain proximity to the area being checked.
9. 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.
10. 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.
11. 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.
12. The compliance times for the actions in WORK INSTRUCTIONS ar e in Compliance.
B. WORK INSTRUCTIONS Actions Required for Compliance
1. Requirements Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Table 1: ETHF Inspection of the Overwing Floor Beams and Detailed Inspection of the Overwing Floor Beam Supports, Left and Right Sides Refer to the listed procedures in SB MD11-53A088 Original Issue or later approved revisions as an accepted procedure Method of ComplianceActionCondition Do PART 1: GET ACCESS -Do a General Visual Inspection of the overwing floor beams for any repair.
ALL AIRPLANES -FIGURE 1 -FIGURE 2 Do PART 2:
CLOSE ACCESS -CONDITION 1 (ACTION 1):
Contact The Boeing Company for alternative inspection(s) to Requirements Bulletin MD11-53A088 RB, incorporate the inspection(s) into the maintenance programs and do the inspection(s) at the times specified by Boeing.
CONDITION 1:
ANY REPAIR FOUND Do PART 1: GET ACCESS -CONDITION 1 (ACTION 2):
Do Detailed Inspections of the overwing floor beam supports and ETHF Inspections of the overwing floor beams at any unrepaired areas, for any crack.
-FIGURE 3 -FIGURE 4 -FIGURE 5 -FIGURE 6 Do PART 2:
CLOSE ACCESS -CONDITION 1.1 (ACTION
1): Contact The Boeing Company for repair instructions and do the repair.
CONDITION 1.1: ANY
CRACK FOUND Do PART 1: GET ACCESS -CONDITION 1.1 (ACTION
2): Repeat Detailed Inspections of the overwing floor beam supports and ETHF Inspections of the overwing floor beams at any unrepaired areas, for any crack.
(a) -FIGURE 3 -FIGURE 4 -FIGURE 5 -FIGURE 6 Do PART 2:
CLOSE ACCESS - Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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Table 1: ETHF Inspection of the Overwing Floor Beams and Detailed Inspection of the Overwing Floor Beam Supports, Left and Right Sides Refer to the listed procedures in SB MD11-53A088 Original Issue or later approved revisions as an accepted procedure Method of ComplianceActionCondition Do PART 2:
CLOSE ACCESS -Repeat Detailed Inspections of the overwing floor beam supports and ETHF Inspections of the overwing floor beams at any unrepaired areas, for any crack.
CONDITION 1.2: NO
CRACK FOUND Do PART 1: GET ACCESS - -FIGURE 3 -FIGURE 4 -FIGURE 5 -FIGURE 6 Do PART 1: GET ACCESS -Do Detailed Inspections of the overwing floor beam supports and ETHF Inspections of the overwing floor beams for any crack.
CONDITION 2:
NO REPAIR FOUND -FIGURE 3 -FIGURE 4 -FIGURE 5 -FIGURE 6 Do PART 2:
CLOSE ACCESS -CONDITION 2.1 (ACTION
1): Contact The Boeing Company for repair instructions and do the repair.
CONDITION 2.1: ANY
CRACK FOUND Do PART 1: GET ACCESS -CONDITION 2.1 (ACTION
2): Repeat Detailed Inspections of the overwing floor beam supports and ETHF Inspections of the overwing floor beams for any crack.
(a) -FIGURE 3 -FIGURE 4 -FIGURE 5 -FIGURE 6 Do PART 2:
CLOSE ACCESS - Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details.
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