Boeing Alert Requirements Bulletin 747-31A2565 RB: Revision 1, text

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Commercial Airplanes 747 Requirements Bulletin ALERT Number: 747-31A2565 RB Original Issue: April 27, 2021 Revision 1: September 14, 2021 ATA System: 3161 SUBJECT: INDICATING/RECORDING SYSTEMS - Integrated Display System - Electronic Flight Information System / Engine Indication and Crew Alerting System Interface Unit 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:

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: April 27, 2021 747-31A2565 RBRevision 1: September 14, 2021 1 of 15

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Original Issue: April 27, 2021 747-31A2565 RBRevision 1: September 14, 2021 2 of 15 REQUIREMENTS BULLETIN 747-31A2565

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Table of Contents

Revision Transmittal Sheet5

1. EFFECTIVITY7

A. Airplanes7

B. Spares Affected8

2. CONCURRENT REQUIREMENTS8

3. COMPLIANCE8

4. APPROVAL9

5. ACCOMPLISHMENT INSTRUCTIONS11

A. General Information11

B. Work Instructions12

FIGURE 1: E2-6 ELECTRONICS SHELF - ELECTRONIC FLIGHT INSTRUMENT SYSTEM / ENGINE

INDICATION AND CREW ALERTING SYSTEM INTERFACE UNIT - INSPECTION14

Original Issue: April 27, 2021 747-31A2565 RBRevision 1: September 14, 2021 3 of 15 REQUIREMENTS BULLETIN 747-31A2565

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Original Issue: April 27, 2021 747-31A2565 RBRevision 1: September 14, 2021 4 of 15 REQUIREMENTS BULLETIN 747-31A2565

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Commercial Airplanes 747 Requirements Bulletin ALERT Revision Transmittal SheetNumber: 747-31A2565 RBOriginal Issue: April 27, 2021 Revision 1: September 14, 2021 ATA System: 3161 SUBJECT: INDICATING/RECORDING SYSTEMS - Integrated Display System - Electronic Flight Information System / Engine Indication and Crew Alerting System Interface Unit Inspection This revision includes all pages of the requirements bulletin.

COMPLIANCE INFORMATION RELATED TO THIS REVISION The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to Requirements Bulletin 747-31A2565 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 747-31A2565 RB mandatory.

Effects of this Revision on airplanes on which Original Issue was previously done:

None.

REASON FOR REVISION This revision is sent to inform operators about airplanes with affected Electronic Flight Instrument System (EFIS) / Engine Indication and Crew Alerting System (EICAS) Interface Unit (EIU). If the EIU is found with an affected serial number marked MODS letter B or an EIU with unaffected serial number on the modification plate, it is defined as a good part. Therefore, no action is required. However, if the EIU affected serial number is found without marked MODS letter B, replace the EIU with the affected serial number with an EIU marked with MODS letter B or with an EIU unaffected serial number.

These sections were changed:

– In Compliance, changed text.

– In Work Instructions, changed text.

REVISION HISTORY Service BulletinService BulletinRequirement BulletinRequirement Bulletin 747-31A2565747-31A2565747-31A2565 RB747-31A2565 RB Issue DateIssue Date April 27, 2021Original Issue:April 27, 2021Original Issue:

September 14, 2021Revision 1:September 14, 2021Revision 1:

Original Issue: April 27, 2021 747-31A2565 RBRevision 1: September 14, 2021 5 of 15

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Original Issue: April 27, 2021 747-31A2565 RBRevision 1: September 14, 2021 6 of 15 REQUIREMENTS BULLETIN 747-31A2565

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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 747-8, 747-8F Airplane(s), line number(s) 1420-99999 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.

The Variable Numbers and Group Information for the applicable airplanes is given below.

NOTE: The Variable Number table below includes all affected airplanes up to Line Number 1573.

Affected airplanes after Line Number 1573 will be added to the service bulletin's MyBoeingFleet.com (MBF) "get effectivity" result when they are added to the MBF Fleet Profile Page.

DESCRIPTIONCONFIGURATIONGROUP Airplanes that can have Electronic Flight Instrument System (EFIS)/Engine Indication and Crew Alerting System (EICAS) Interface Units (EIUs) with hand brushed conformal coating on the Aeronautical Radio, Incorporated (ARINC) Input/Output (I/O) card.

-1 Airplane Models:

Original Issue: April 27, 2021 747-31A2565 RBRevision 1: September 14, 2021 7 of 15

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GroupVariable Number 1RC001 - RC009 1RC021 - RC040 1RC051 - RC060 1RC066 - RC072 1RC076 - RC077 1RC501 - RC514 GroupVariable Number 1RC521 - RC528 1RC531 - RC541 1RC546 - RC566 1RC571 - RC582 1RC601 - RC610 1RC641 - RC644 GroupVariable Number 1RC651 - RC652 1RC661 1RC671 - RC674 1RC681 - RC696 1RC701 - RC703 -- B. Spares Affected Refer to Parts and Materials Supplied by the Operator for the recommended actions.

2. CONCURRENT REQUIREMENTS None.

3. COMPLIANCE The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to Requirements Bulletin 747-31A2565 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 747-31A2565 RB mandatory.

Accomplish the required action(s), based on the applicable condition(s) in Table 1, in accordance with 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: Electronic Flight Instrument System / Engine Indication and Crew Alerting System Interface Unit Serial Number Inspection Repeat Interval (Not to Exceed) Compliance TimeActionCondition -Within 24 months after the Original Issue date of Requirements Bulletin 747-31A2565 RB or within 24 months after the date of issuance of the original standard certificate of airworthiness or the original export certificate of airworthiness, whichever occurs later.

Option 1: Do a maintenance records check of the left, center, and right EIUs for the affected serial number.

All Airplanes Option 2: Do an inspection of the left, center, and right EIUs for the affected serial number.

Original Issue: April 27, 2021 747-31A2565 RBRevision 1: September 14, 2021 8 of 15 REQUIREMENTS BULLETIN 747-31A2565

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NO AFFECTED SERI-

AL NUMBER OR AF-

FECTED SERIAL

NUMBER MARKED

WITH MODS LETTER

B ON THE MODIFICA-

TION PLATE FOUND

AT LEFT, CENTER, AND RIGHT EIUs -Within 24 months after the Original Issue date of Requirements Bulletin 747-31A2565 RB or within 24 months after the date of issuance of the original standard certificate of airworthiness or the original export certificate of airworthiness, whichever occurs later.

Replace the left EIU with an unaffected serial number or with an affected serial number marked MODS letter B on the modification plate.

CONDITION 2:

ANY AFFECTED SERI-

AL NUMBER WITH-

OUT MARKED MODS

LETTER B ON THE

MODIFICATION

PLATE FOUND AT

THE LEFT EIU -Replace the center EIU with an unaffected serial number or with an affected serial number marked MODS letter B on the modification plate.

CONDITION 3:

ANY AFFECTED SERI-

AL NUMBER WITH-

OUT MARKED MODS

LETTER B ON THE

MODIFICATION

PLATE FOUND AT

THE CENTER EIU -Replace the right EIU with an unaffected serial number or with an affected serial number marked MODS letter B on the modification plate.

CONDITION 4:

ANY AFFECTED SERI-

AL NUMBER WITH-

OUT MARKED MODS

LETTER B ON THE

MODIFICATION

PLATE FOUND AT

THE RIGHT EIU

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 Union Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in this Requirements 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.

Original Issue: April 27, 2021 747-31A2565 RBRevision 1: September 14, 2021 9 of 15 REQUIREMENTS BULLETIN 747-31A2565

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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.

Original Issue: April 27, 2021 747-31A2565 RBRevision 1: September 14, 2021 10 of 15 REQUIREMENTS BULLETIN 747-31A2565

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5. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION

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 – Hole dimensions for standard solid rivets and fasteners are in Structural Repair Manual (SRM) Chapter 51 – Torque Values:

— Values for electrical maintenance tasks are included in Chapter 20 of Standard Wiring Practices Manual (SWPM).

— Non-standard torque values for maintenance tasks are included in the applicable installation step.

Original Issue: April 27, 2021 747-31A2565 RBRevision 1: September 14, 2021 11 of 15 REQUIREMENTS BULLETIN 747-31A2565

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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.

7. 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.

B. WORK INSTRUCTIONS Actions Required for Compliance

1. Requirements:

Table 1: Electronic Flight Instrument System / Engine Indication and Crew Alerting System Interface Unit Serial Number Inspection Refer to the listed procedures in SB 747-31A2565 Original Issue or later approved revisions as an accepted procedure.

Method of Compliance ActionCondition -FIGURE 1Option 1: Do a maintenance records check of the left, center, and right Electronic Flight Instrument System (EFIS) / Engine Indication and Crew Alerting System (EICAS) Interface Units (EIUs) for the affected serial number.

All Airplanes PART 1: Open Access.Option 2: Do an inspection of the left, center, and right EIUs for the affected serial number.

PART 3: Close Access.-No further action is required.CONDITION 1:

NO AFFECTED SERI-

AL NUMBER OR AF-

FECTED SERIAL

NUMBER MARKED

WITH MODS LETTER

B ON THE MODIFICA-

TION PLATE FOUND

Original Issue: April 27, 2021 747-31A2565 RBRevision 1: September 14, 2021 12 of 15 REQUIREMENTS BULLETIN 747-31A2565

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