# Airbus Canada Service Bulletin BD500-270020

Copy: Revision 001 ("BD500-270020_Issue 001"), 26 pages: PDF https://openairdocs.org/files/sha256/5f/56/5f5636ee0e295bbc8d3d1efd5c3b5c31d63b0b84db9aafc8c72f3b4ce07e60b7; text https://openairdocs.org/service-documents/airbus-canada/bd500-270020/file/5f5636ee0e29.md. Rights: © Airbus Canada Limited Partnership. Filed by the FAA in regulations.gov docket FAA-2023-0654, the docket of AD 2023-12-09. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Airbus Canada](https://openairdocs.org/service-documents/airbus-canada.md)
- Type: Service bulletin (Service Bulletin)
- Number: BD500-270020
- Latest revision known: BD500-270020, Issue 001, dated September 28, 2022 (OpenAirDocs)
- Page: https://openairdocs.org/service-documents/airbus-canada/bd500-270020

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/airbus-canada/bd500-270020/proposed.md).

## Text (26 pages)

Rights: © Airbus Canada Limited Partnership. Filed by the FAA in regulations.gov docket FAA-2023-0654, the docket of AD 2023-12-09. Not covered by OpenAirDocs’ CC0 dedication. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

BD500-270020
 
 
 2022-09-28  Page 1
 
Service Bulletin
Flight Controls - General - Primary Flight
Control Computers (PFCCs) Software
Update for the Control Laws (CLAWS) and
CAT IIIB Approach Function Correction
BD500-270020
Issue No. 001
Copyright © 2022 Airbus Canada Limited Partnership
All rights reserved. No part of this work may be reproduced or copied in any form or by any means without written permission of Airbus
Canada Limited Partnership.
The Airbus and A220 logos are registered trademarks of Airbus Canada Limited Partnership.
The information, technical data and the designs disclosed herein are the exclusive property of Airbus Canada Limited Partnership or
contain proprietary rights of others and are not to be used or disclosed to others without the written consent of Airbus Canada Limited
Partnership. The recipient of this document, by its retention and use, agrees to hold in confidence the technical data and designs contained
herein. The foregoing shall not apply to persons having proprietary rights to such information, technical data or such designs to the extent
that such rights exist.
Manufacturer:
Airbus Canada Limited Partnership
Customer Services
13100 Henri-Fabre Blvd., Mirabel, Quebec
Canada J7N 3C6

### Page 2

BD500-270020
 
Intentionally left blank
 
 2022-09-28  Page 2

### Page 3

BD500-270020
 
 
 2022-09-28  Page 1
Table of contents
The listed documents are included in Issue 001, dated 2022-09-28, of this publication.
Document title Data module code Issue date Applicable
to
Flight Controls - General - Primary Flight
Control Computers (PFCCs) Software
Update for the Control Laws (CLAWS)
and CAT IIIB Approach Function
Correction - Service Bulletin
BD500-A-J27-00-20-00AAA-930A-A 2022-09-28 50010-50018,
50020-50067,
55003-55016,
55018-55198,
55200-55201,
55203,
55205,
55208,
55210
Primary Flight Control Computers
(PFCCs) Software Update for the Control
Laws (CLAWS) and CAT IIIB Approach
Function Correction - Material information
BD500-A-J27-00-20-01AAA-934A-A 2022-09-28 50010-50018,
50020-50067,
55003-55016,
55018-55198,
55200-55201,
55203,
55205,
55208,
55210
Primary Flight Control Computers
(PFCCs) Software Update for the Control
Laws (CLAWS) and CAT IIIB Approach
Function Correction - Accomplishment
instruction
BD500-A-J27-00-20-01AAA-933A-A 2022-09-28 50010-50018,
50020-50067,
55003-55016,
55018-55198,
55200-55201,
55203,
55205,
55208,
55210

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BD500-270020
 
Intentionally left blank
 
 2022-09-28  Page 2

### Page 5

BD500-270020
 
See applicability on the
first page of the DM
BD500-A-J27-00-20-00AAA-930A-A
BD500-A-J27-00-20-00AAA-930A-A
 2022-09-28  Page 1
Flight Controls - General - Primary Flight Control Computers
(PFCCs) Software Update for the Control Laws (CLAWS) and
CAT IIIB Approach Function Correction - Service Bulletin
 
Applicability: 50010-50018, 50020-50067, 55003-55016, 55018-55198, 55200-55201, 55203, 55205, 55208,
55210
 
Table of contents Page
Flight Controls - General - Primary Flight Control Computers (PFCCs) Software Update for
the Control Laws (CLAWS) and CAT IIIB Approach Function Correction - Service Bulletin..... 1
References................................................................................................................................ 1
Service Bulletin.......................................................................................................................... 1
Common information................................................................................................................. 1
1 Maintenance Publications........................................................................................... 6
2 Operational Publications............................................................................................. 6
List of tables Page
1 References.................................................................................................................. 1
References
Table 1  References
Data Module/Technical Publication Title
BD500-A-J27-00-20-01AAA-934A-A Primary Flight Control Computers (PFCCs) Software
Update for the Control Laws (CLAWS) and CAT IIIB
Approach Function Correction - Material information
BD500-A-J27-00-20-01AAA-933A-A Primary Flight Control Computers (PFCCs) Software
Update for the Control Laws (CLAWS) and CAT IIIB
Approach Function Correction - Accomplishment
instruction
Service Bulletin
Common information
THIS SERVICE BULLETIN IS SENT TO EACH OPERATOR. IF THE OPERATOR HAS
LEASED AIRCRAFT, SEND THE SERVICE BULLETIN TO THE LESSEE. IF THE OPERATOR
HAS SOLD AIRCRAFT OR TRANSFERRED SPARES IN THE LAST SIX MONTHS, SEND
THIS SERVICE BULLETIN TO THE NEW OWNER, UNLESS CONFIRMATION WAS
RECEIVED THAT AIRBUS HAS INCLUDED THE NEW OPERATOR ON THE DISTRIBUTION
LIST.
Management information
Compliance category: Mandatory (Service bulletin must be accomplished)
Task category: Software update

### Page 6

BD500-270020
 
See applicability on the
first page of the DM
BD500-A-J27-00-20-00AAA-930A-A
BD500-A-J27-00-20-00AAA-930A-A
 2022-09-28  Page 2
Original issue date: 2022-09-28
Impact list
Impact (Maintenance publications):
Refer to the Documentation affected section of the Planning Information section.
Accomplishment limits
None
Replacement service bulletin
None
Revision information
Initial issue
Summary
Applicability
BD-500-1A10, Aircraft 50010 thru 50018, and 50020 thru 50067
BD-500-1A11, Aircraft 55003 thru 55016, 55018 thru 55198, 55200, 55201, 55203, 55205,
55208, and 55210
Reason
The software of the Primary Flight Control Computers (PFCC) is updated so that the new
Control Laws (CLAWS) obey the compliance requirements for the Maximum Landing Weight
(MLW) increase and to resolve inadvertent Direct Mode reversions in approach on CATIIIB
capable configuration.
Description
The aircraft is put in standard configuration for maintenance. All pre-existing repairs and
damage that were accepted per ASRP-permitted damage limits on affected structures are
identified and reported to a CRC representative for analysis and to get an approved disposition.
The software of the three PFCCs is updated with this service bulletin. The return to service tests
are done.
Concurrent requirements
On aircraft 50010 thru 50018, 50020 thru 50059, 50061, 55003 thru 55016, 55018 thru
55088, 55090 thru 55132, and 55137
Service Bulletin BD500-270013, Flight Controls - General - Primary Flight Control Computers
(PFCCs) and Remote Electronic Units (REUs) Software Update, is a pre-requisite to this service
bulletin.
or
Service Bulletin BD500-270017, Flight Controls - General - Primary Flight Control Computers
(PFCCs) and Remote Electronic Units (REUs) Software Update for ABIT Nuisance Faults, is a
pre-requisite to this service bulletin.
Manpower
It will take an estimated 4.00 h to complete this service bulletin.

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BD500-270020
 
See applicability on the
first page of the DM
BD500-A-J27-00-20-00AAA-930A-A
BD500-A-J27-00-20-00AAA-930A-A
 2022-09-28  Page 3
Note
These estimates do not include the man-hours necessary to do an inspection of the
structure.
Material information
Refer to BD500-A-J27-00-20-01AAA-934A-A
Planning information
Applicability
Aircraft affected:
AIRCRAFT MODEL SERVICE AIRCRAFT
SERIAL NUMBER
PRODUCTION AIRCRAFT SERIAL
NUMBERS
BD-500-1A10 50010 thru 50018, and 50020
thru 50067
50019, 50068 and subsequent serial
numbers 1
BD-500-1A11 55003 thru 55016, 55018 thru
55198, 55200, 55201, 55203,
55205, 55208, and 55210
55017, 55199, 55202, 55204, 55206,
55207, 55209, 55211 and subsequent
serial numbers 1.
1 Aircraft will have an equivalent modification incorporated before delivery.
Note
The instructions in this service bulletin are only applicable to the systems and parts
installed at the time of delivery of the aircraft or as changed by Airbus Service Bulletins.
Before you do this service bulletin, examine all Supplemental Type Certificates (STCs),
Supplemental Type Approvals (STAs), or equivalent action changes to make sure you can
complete this service bulletin.
Reason
Problem and effect
The software of the Primary Flight Control Computers (PFCC) is updated so that the new Con-
trol Laws (CLAWS) obey the compliance requirements for the Maximum Landing Weight (MLW)
increase and to resolve inadvertent Direct Mode reversions in approach on CATIIIB capable
configuration.
Objective/Solution
This service bulletin gives the instructions to update the software of the PFCCs. The PFCC soft-
ware update will change the CLAWS to obey the compliance requirements of the certification of
the MLW increase and correct the CAT IIIB approach issue. The software update will include,
with other changes, the improvements that follow:
- Aileron trailing edge up displacement increase for ground lift dump.
- Aileron trailing edge down displacement in cruise to slightly reduce wing drag.
- Various improvements in the High Alpha Protection (HAP) and Pitch Attitude Protection
(PAP) functions.

### Page 8

BD500-270020
 
See applicability on the
first page of the DM
BD500-A-J27-00-20-00AAA-930A-A
BD500-A-J27-00-20-00AAA-930A-A
 2022-09-28  Page 4
- Ground-to-flight pitch limit modification.
Description
The aircraft is put in standard configuration for maintenance. All pre-existing repairs and
damage that were accepted per ASRP-permitted damage limits on affected structures are
identified and reported to a CRC representative for analysis and to get an approved disposition.
The software of the three PFCCs is updated with this service bulletin. The return to service tests
are done.
Compliance
Applicability: 50020-50067, 55018-55019, 55022, 55024, 55026, 55028, 55031, 55035, 55037, 55049,
55067, 55069-55070, 55075-55076, 55078-55080, 55082-55085, 55088, 55090, 55092-55093, 55096-55098,
55100-55103, 55105, 55107, 55109, 55111-55112, 55117-55119, 55122-55123, 55134, 55138-55142,
55146-55147, 55149, 55152-55153, 55155, 55157, 55159, 55161, 55166, 55169-55171, 55173-55175, 55179,
55185, 55187, 55190, 55192-55193, 55195-55198, 55200, 55205, 55210
Mandatory Service Bulletin
- Airbus recommends that this service bulletin be done within 36 months from the release
date of this service bulletin, unless otherwise directed by the airworthiness authority of the
operator.
Applicability: 50010-50018, 55003-55016, 55020-55021, 55023, 55025, 55027, 55029-55030, 55032-55034,
55036, 55038-55048, 55050-55066, 55068, 55071-55074, 55077, 55081, 55086-55087, 55089, 55091,
55094-55095, 55099, 55104, 55106, 55108, 55110, 55113-55116, 55120-55121, 55124-55133, 55135-55137,
55143-55145, 55148, 55150-55151, 55154, 55156, 55158, 55160, 55162-55165, 55167-55168, 55172,
55176-55178, 55180-55184, 55186, 55188-55189, 55191, 55194, 55201, 55203, 55208
Recommended Service Bulletin
- Airbus recommends that this service bulletin be done at the earliest convenience of the op-
erator, unless otherwise directed by the airworthiness authority of the operator.
Note
If it is not possible to complete all the instructions in this service bulletin because of
the configuration of the aircraft, speak with a CRC representative at 1 866 A220 CRC
(1-866-222-0272) or 1-450-476-7676 or e-mail at A220_crc@abc.airbus for analysis and to
get approved instructions to complete this service bulletin.
Note
When this service bulletin is incorporated, use the Airplane Flight Manual (AFM) issue that
follows: Issue 020 or later.
Note
For EASA operators only: When this service bulletin is incorporated, use the Operational
Suitability Data (OSD) Flight crew A220 (BD500) rev. 7 or later

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BD500-270020
 
See applicability on the
first page of the DM
BD500-A-J27-00-20-00AAA-930A-A
BD500-A-J27-00-20-00AAA-930A-A
 2022-09-28  Page 5
Note
This service bulletin does not affect Airworthiness Limitations Items (ALIs) or Damage
Tolerance Inspections (DTIs).
Concurrent requirements
On aircraft 50010 thru 50018, 50020 thru 50059, 50061, 55003 thru 55016, 55018 thru
55088, 55090 thru 55132, and 55137
Service Bulletin BD500-270013, Flight Controls - General - Primary Flight Control Computers
(PFCCs) and Remote Electronic Units (REUs) Software Update, is a pre-requisite to this service
bulletin
or
Service Bulletin BD500-270017, Flight Controls - General - Primary Flight Control Computers
(PFCCs) and Remote Electronic Units (REUs) Software Update for ABIT Nuisance Faults, is a
pre-requisite to this service bulletin.
Approval
The technical content of this service bulletin has been approved under the authority of the TC-
CA Design Approval Organization No: DAO #19-Q-02.
Manpower
The man-hours given below are estimates for direct labor done by an experienced crew on an
aircraft prepared for maintenance.
These estimates do not include the time necessary for:
- Administrative functions such as planning, liaising, familiarization, and report writing.
- Non-productive elapsed time such as rest time, having meals, and crew shift changes.
- Elapsed time such as for paint to dry, sealant to cure, and fuel tank venting.
- Preparation for modification (unless specified in the Accomplishment Instructions) such as
cleaning and getting parts, tools, consumables, and ground equipment.
- Quality assurance inspections, troubleshooting and/or correction of discrepancies found
when a task is done.
- All other activities that are not considered by Airbus as directly related to the accomplish-
ment of this procedure.
It will take an estimated 4.00 h to complete this service bulletin. The man-hours are divided as
shown in the table that follows:
TASK MAN-HOURS
Job Set-Up 0.25 h
Procedure 3.00 h
Test 0.50 h
Job Close-Up 0.25 h

### Page 10

BD500-270020
 
See applicability on the
first page of the DM
BD500-A-J27-00-20-00AAA-930A-A
BD500-A-J27-00-20-00AAA-930A-A
 2022-09-28  Page 6
Note
These estimates do not include the man-hours necessary to do an inspection of the
structure.
Weight and balance
Not changed
Electrical load data
Not changed
Referenced documentation
Refer to the SB Introduction document BD500-000000 for definition or explanation of service
bulletin content.
For Airbus reference only: Restriction and/or Special Instruction RSI C-500-000-27-0050,
Revision C
Modification Summary 500T103657, Revision B
For Airbus reference only: PCR 59494 and 61436
Documentation affected
1 Maintenance Publications
Aircraft Maintenance Publication (AMP)
Illustrated Parts Data Publication (IPDP)
2 Operational Publications
Airplane Flight Manual (AFM)
Flight Crew Operating Manual - Volume 1 (FCOM1)
Flight Crew Operating Manual - Volume 2 (FCOM2)
Quick Reference Handbook (QRH)
Industry support information
This Service Bulletin is part of an AIRBUS monitored retrofit campaign.
For the organization of this retrofit, contact your AIRBUS Customer Services Program Support
Program Manager.
For aircraft under warranty and for aircraft out of warranty at the time of the initial issue date of
this Service Bulletin:
AIRBUS will share the costs of accomplishment of this Service Bulletin by supplying the kits at
no charge for orders placed within 36 months after the initial issue date of the Service Bulletin.
The latest valid price and lead time for ordering purposes must be from the SATAIR Market
Portal or from the SATAIR representative COF.
AIRBUS will credit up to 1.5 man-hours at the agreed in-house warranty labor rate for claims
received no later than 90 days after completion of the last affected aircraft of your fleet, for
the accomplishment of this Service Bulletin within 36 months after the initial issue date of the
Service Bulletin.

### Page 11

BD500-270020
 
See applicability on the
first page of the DM
BD500-A-J27-00-20-00AAA-930A-A
BD500-A-J27-00-20-00AAA-930A-A
End of data module
 2022-09-28  Page 7
Material information
BD500-A-J27-00-20-01AAA-934A-A
Accomplishment instructions
BD500-A-J27-00-20-01AAA-933A-A
Additional information
None

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BD500-A-J27-00-20-00AAA-930A-A
BD500-A-J27-00-20-00AAA-930A-A
 2022-09-28  Page 8

### Page 13

BD500-270020
 
See applicability on the
first page of the DM
BD500-A-J27-00-20-01AAA-934A-A
BD500-A-J27-00-20-01AAA-934A-A
 2022-09-28  Page 1
Primary Flight Control Computers (PFCCs) Software
Update for the Control Laws (CLAWS) and CAT IIIB
Approach Function Correction - Material information
 
Applicability: 50010-50018, 50020-50067, 55003-55016, 55018-55198, 55200-55201, 55203, 55205, 55208,
55210
 
Table of contents Page
Primary Flight Control Computers (PFCCs) Software Update for the Control Laws (CLAWS)
and CAT IIIB Approach Function Correction - Material information .......................................... 1
References................................................................................................................................ 1
Service Bulletin.......................................................................................................................... 1
List of tables Page
1 References.................................................................................................................. 1
References
Table 1  References
Data Module/Technical Publication Title
None
Service Bulletin
Material set list
No information
Support equipment list
The support equipment in the table that follows is necessary to complete this service bulletin.
Individual support equipment:
Part number
[Mfg. code]
Name Quantity Remarks
Commercially available USB memory stick 2 USB 2.0, FAT32, 8GB
(minimum)
Supplies list
There are no supplies for this service bulletin.
Spares list
When ordered, the software file in the table that follows is found on the
A220World.airbus.com portal → FlightLink → My LSAPs → Field Loadable Software.

### Page 14

BD500-270020
 
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BD500-A-J27-00-20-01AAA-934A-A
BD500-A-J27-00-20-01AAA-934A-A
 2022-09-28  Page 2
Note
Load the applicable ECL file on USB key #2.
Individual spare:
Part number
[Mfg. code]
Name Quantity Remarks
ECL_
BACS100xxxYYY-xx 
[3AB48]
A220-100, Electronic Checklist 1 YYY = 020 and up
Refer to IPDP for the
applicable part number.
Individual spare:
Part number
[Mfg. code]
Name Quantity Remarks
ECL_
BACS300xxxYYY-xx 
[3AB48]
A220-300, Electronic Checklist 1 YYY = 020 and up
Refer to IPDP for the
applicable part number.
When ordered, the software file in the table that follows is found on the
A220World.airbus.com portal → FlightLink → My LSAPs → Field Loadable Software.
Note
Load the PFCC software on USB key #1.
Individual spare:
Part number
[Mfg. code]
Name Quantity Remarks
810-0337-008
[0EFD0]
Software, PFCC Application 3
Procurement information:
Procurement address:
Name: For customers based in the Americas
Business unit:
Business unit name: Satair USA, Inc
525 Westpark Drive, Suite 400
Peachtree City, GA  30269
United States of America
Ph.: 1 404 675 6333
Please contact your Customer Order Specialist
https:/www.satair.com/market/search
CPHSB7X
Name: For customers based in Europe, Middle East, Africa
Business unit:
Business unit name: Satair A/S
Amager Landevej 147A

### Page 15

BD500-270020
 
See applicability on the
first page of the DM
BD500-A-J27-00-20-01AAA-934A-A
BD500-A-J27-00-20-01AAA-934A-A
End of data module
 2022-09-28  Page 3
2770 Kastrup
Denmark
Ph.: 45 3247 0100
Please contact your Customer Order Specialist
https:/www.satair.com/market/search
CPHSB7X
Name: For customers based in the Asia Pacific (excluding mainland China)
Business unit:
Business unit name: Satair Pte Ltd
12 Seletar Aerospace Link
Singapore  797553
The Republic of Singapore
Ph.: 65 6543 0977
Please contact your Customer Order Specialist
https:/www.satair.com/market/search
CPHSB7X
Name: For customers based in mainland China
Business unit:
Business unit name: Satair (Beijing) Co. Ltd
Tian Zhu Lu 8, Tianzhu Airport Industrial Zone
Beijing  101312
People’s Republic of China
Ph.: 86 10 8048 6161
Please contact your Customer Order Specialist
https:/www.satair.com/market/search
CPHSB7X
Removed spares list
Individual removed spare:
Pre-SB
Part number
[Mfg. code]
Name Qty Usage Post-SB
Part number
[Mfg. code]
Description
(Repl. condition)
[Repl. code]
810-0337-007
[0EFD0]
Software, PFCC
Application
3 Discarded 810-0337-008
[0EFD0]
[Refer to IPDP]

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BD500-A-J27-00-20-01AAA-934A-A
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BD500-270020
 
See applicability on the
first page of the DM
BD500-A-J27-00-20-01AAA-933A-A
BD500-A-J27-00-20-01AAA-933A-A
 2022-09-28  Page 1
Primary Flight Control Computers (PFCCs) Software Update
for the Control Laws (CLAWS) and CAT IIIB Approach
Function Correction - Accomplishment instruction
 
Applicability: 50010-50018, 50020-50067, 55003-55016, 55018-55198, 55200-55201, 55203, 55205, 55208,
55210
 
Table of contents Page
Primary Flight Control Computers (PFCCs) Software Update for the Control Laws (CLAWS)
and CAT IIIB Approach Function Correction - Accomplishment instruction.............................. 1
References................................................................................................................................ 1
Preliminary requirements.......................................................................................................... 3
Procedure.................................................................................................................................. 3
1 General information.................................................................................................... 3
2 Job set-up................................................................................................................... 4
3 Procedure.................................................................................................................... 5
4 Job close-up................................................................................................................ 9
5 Administrative.............................................................................................................. 10
Requirements after job completion ........................................................................................... 10
List of tables Page
1 References.................................................................................................................. 1
2 Required conditions.................................................................................................... 3
3 Support equipment...................................................................................................... 3
4 Consumables, materials, and expendables ................................................................ 3
5 Spares......................................................................................................................... 3
6 PFCC Software Part Number ..................................................................................... 4
7 ECL Software Part Number ........................................................................................ 4
8 Applicable ATA for Repair or Damage ....................................................................... 5
9 PFCC Software Part Number ..................................................................................... 9
10 Required conditions.................................................................................................... 10
List of figures Page
1 HSTAB Center Box..................................................................................................... 7
References
Table 1  References
Data Module/Technical Publication Title
BD500-A-J12-00-00-01AAA-398A-A Standard configuration for maintenance - Aircraft
system configuration
BD500-A-J52-43-00-01AAA-540A-A Mid avionics compartment door - Open for access
procedure
BD500-A-J24-00-00-01AAA-913G-A Electrical/Electronic safety precautions - General
maintenance safety procedure
BD500-A-J24-00-00-01AAA-761A-A Electrical power - General - Energize electrical network

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BD500-A-J27-00-20-01AAA-933A-A
BD500-A-J27-00-20-01AAA-933A-A
 2022-09-28  Page 2
Data Module/Technical Publication Title
BD500-A-J32-60-00-03AAA-398A-A Weight On Wheels (WOW) configuration - Aircraft
system configuration
BD500-A-J24-00-00-08AAA-398D-A Thermal circuit breaker closing - Circuit breaker
operation
BD500-A-J24-00-00-10AAA-398D-A Electronic circuit breaker closing from OUT to IN -
Circuit breaker operation
BD500-A-J24-00-00-11AAA-398D-A Circuit Protection Device (CPD) closing - Circuit
breaker operation
BD500-A-J46-15-01-02AAA-752A-A Transfer the Universal Serial Bus (USB) memory stick
data to the Information Management System (IMS) unit
- Data loading
BD500-A-J46-15-00-02AAA-752A-A Loading of new documents and tables - Data loading
BD500-A-J27-04-05-01AAA-750A-A Primary Flight Control Computer (PFCC) - Load
software procedure
BD500-A-J27-04-00-01AAA-343A-A Electronic Flight Control System (FCS) - BIT
BD500-A-J27-04-00-02AAA-343A-A Actuation Flight Control System (FCS) - BIT
BD500-A-J27-04-05-01AAA-551A-A Primary Flight Control Computer (PFCC) No. 1 Non-
Volatile Memory (NVM) - Fault monitoring storage
readout (downloading)
BD500-A-J27-04-05-02AAA-551A-A Primary Flight Control Computer (PFCC) No. 2 Non-
Volatile Memory (NVM) - Fault monitoring storage
readout (downloading)
BD500-A-J27-04-05-03AAA-551A-A Primary Flight Control Computer (PFCC) No. 3 Non-
Volatile Memory (NVM) - Fault monitoring storage
readout (downloading)
BD500-A-J27-04-05-01AAA-552A-A Primary Flight Control Computer (PFCC) Non-Volatile
Memory (NVM) - Data erasing
BD500-A-J52-43-00-01AAA-740A-A Mid avionics compartment door - Close after access
procedure

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BD500-270020
 
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BD500-A-J27-00-20-01AAA-933A-A
BD500-A-J27-00-20-01AAA-933A-A
 2022-09-28  Page 3
Preliminary requirements
Required conditions
Table 2  Required conditions
Action/Condition Data Module/Technical publication
None
Support equipment
Table 3  Support equipment
Name Identification/Reference Quantity Remark
None
Consumables, materials, and expendables
Table 4  Consumables, materials, and expendables
Name Identification/Reference Quantity Remark
None
Spares
Table 5  Spares
Name Identification/Reference Quantity Remark
None
Safety conditions
None
Procedure
1 General information
Note
This service bulletin is classified as Mandatory or expected to be Mandatory by
an Airworthiness Directive (AD). The Procedure section of the Accomplishment

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Instructions is Required for Compliance (RC) and must be done to comply with
the AD. The Job set-up and Job close-up sections, with the exception of the
return-to-service tests, are recommended and can be deviated from, done as part
of other actions, or done with accepted methods different from those given in the
service bulletin, as long as the RC section can be done and the aircraft can be put
back into a serviceable condition.
2 Job set-up
Note
The steps in the Job set-up section of this service bulletin are recommended
steps. The steps give a recommendation to get access to the work area. This
recommendation is to give a safe work area and to minimize possible damage to
surrounding aircraft parts. Alternative steps can be used at the discretion of the
operator.
2.1 Format and identify the Universal Serial Bus (USB) keys as follows:
2.1.1 Identify USB key 1 as “Key #1 PFCC application software“.
2.1.2 Identify USB key 2 as “Key #2 ECL file“.
2.2 From the web site address A220World.airbus.com portal → FlightLink → My
LSAPs → Field Loadable Software, download the software shown in the Table 6
that follows on formatted USB key #1.
Table 6 PFCC Software Part Number
SYSTEM / APPLICATION SOFTWARE P/N REMARK
PFCC 810-0337-008 CRC: 0xE8C6D74E
2.3 From the web site address A220World.airbus.com portal → FlightLink → My
LSAPs → Field Loadable Software, download the software shown in the Table 7
that follows on formatted USB key #2.
Note
Always refer to the IPDP for version applicability.
Table 7 ECL Software Part Number
AIRCRAFT SYSTEM / APPLICATION SOFTWARE P/N REMARK
A220-100 Electronic Checklist ECL_ BACS100xxxYYY-xx1 Refer to IPDP
for applicability
A220-300 Electronic Checklist ECL_ BACS300xxxYYY-xx1 Refer to IPDP
for applicability
1 YYY = 020 and up
2.4 Make sure that the aircraft is in standard configuration for maintenance (refer to
AMP BD500-A-J12-00-00-01AAA-398A-A).
2.5 Open the mid avionic compartment door for access (refer to AMP BD500-A-
J52-43-00-01AAA-540A-A).

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2.6 Obey all the electrical/electronic safety precautions (refer to AMP BD500-A-
J24-00-00-01AAA-913G-A).
2.7 Energize the electrical network of the aircraft (refer to AMP BD500-A-
J24-00-00-01AAA-761A-A).
2.8 Make sure that the aircraft is in a Weight on Wheels (WOW) configuration (refer
to AMP BD500-A-J32-60-00-03AAA-398A-A).
3 Procedure
3.1 If it is not possible to complete all the instructions in this service bulletin
because of the configuration of the aircraft, speak with a CRC representative
at 1 866 A220 CRC (1-866-222-0272) or 1-450-476-7676 or e-mail at
A220_crc@abc.airbus for analysis and to get an approved disposition to
complete this service bulletin.
3.2 Identify pre-existing in-service repairs, damage and non conformity as follows:
Note
Speak with a CRC representative at 1 866 A220 CRC (1-866-222-0272) or
1-450-476-7676 or e-mail at A220_crc@abc.airbus for acceptance of the
method used to do these steps.
Note
If it is not possible to correctly identify pre-existing repairs and/or damage
within ASRP-permitted damage limits from the aircraft maintenance
records, it is necessary to do a detailed inspection of the affected structures
shown in Table 8. If this is necessary, speak with a CRC representative to
get a detailed inspection procedure.
3.2.1 Identify all repairs for the Air Transport Association (ATA) structures in
Table 8 done after the aircraft received its Certificate of Airworthiness
(CofA). If a repair was done in the ATA listed in Table 8, speak with
a CRC representative at 1 866 A220 CRC (1-866-222-0272) or
1-450-476-7676 or e-mail at A220_crc@abc.airbus for analysis and to
get an approved disposition to complete this service bulletin.
3.2.2 Identify all damage for the ATA structures in Table 8 that were
previously within ASRP-permitted damage limits dispositioned
after the aircraft received its CofA. If you find damage that is no
longer within ASRP-permitted damage limits using ASRP issue
136.01 or later approved, speak with a CRC representative at 1
866 A220 CRC (1-866-222-0272) or 1-450-476-7676 or e-mail at
A220_crc@abc.airbus for analysis and to get an approved disposition
to complete this service bulletin.
3.2.3 Contact the CRC to identify any pre CofA RNCs that require further
action, and to get an approved disposition, if applicable, to complete
this service bulletin.
Table 8 Applicable ATA for Repair or Damage
STRUCTURE ATA LOCATION STRUCTURE A220-100 A220-300
AFT FUSE 53-71 ENTIRE AFT FUSE
SKINS, FRAMES,
LONGERONS DOU-
BLER AROUND HSTAB
YES YES

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STRUCTURE ATA LOCATION STRUCTURE A220-100 A220-300
CUTOUT, ATTACHE-
MENTS TO TAILCONE
TAILCONE 53-84 ENTIRE TAILCONE
SKINS, FRAMES,
STRINGERS, ATTACH-
MENTS TO AFT FUSE
YES YES
HSTAB CEN-
TER BOX
(Refer to
Fig. 1)
55-11
FROM LHS TCHORD
TO RHS TCHORD,
INCLUSIVE
OF TCHORDS
SKINS, SPARS,
TCHORDS YES YES
SLATS AND
WING LEAD-
ING EDGE
57-41
57-42
SLATS 2 AND 3
LEADING EDGE IN
SLAT 2 & 3 AREA
ALL SLAT STRUC-
TURAL COMPO-
NENTS / LEAD-
ING EDGE SKINS,
RIBS AND TORQUE
BOX ATTACHMENT
BEHIND SLAT 2 AND 3
NO YES
WING BOX 57-21
A220-100: WS
166.28-215.32
WS 355.40-509.48
A220-300: WS
141.83-215.32
WS 422.95-465.71
WS 558.09-639.64
WING MAIN TORQUE
BOX: SKINS,
RIBS, SPARS
YES YES
OUTBD FLAP
AND SUP-
PORTING
STRUCTURE
57-53
57-54
ENTIRE FLAP AND
BOTH FLAP TRACKS
FLAP MAIN TORQUE
BOX: SKINS, RIBS,
ATTACH FITTINGS
FLAP TRACKS
NO YES

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1
LEGEND
1. HSTAB Center Box
HORIZONTAL STABILIZER (HSTAB)
(REF)
ICN-BD500-A-J270020-F-3AB48-74409-A-001-01
Figure 1 HSTAB Center Box

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3.3 Make sure that the thermal circuit breaker that follows is closed (refer to AMP
BD500-A-J24-00-00-08AAA-398D-A):
NAME CB NUMBER/LOCATION
PFCC 3 L-CBP-B5
3.4 Make sure that the electronic circuit breaker that follows is IN on the CB
synoptic page (refer to AMP BD500-A-J24-00-00-10AAA-398D-A):
NAME CB NUMBER/LOCATION
IMS CDC3-4-16
3.5 Make sure that the toggle switch is set to the ENABLE position for the electronic
circuit breakers that follow (refer to AMP BD500-A-J24-00-00-11AAA-398D-A):
NAME CB NUMBER/LOCATION
PFCC 1 L-FBWPC-5
PFCC 2 R-FBWPC-5
3.6 Transfer the applicable Electronic Checklist (ECL) configuration file from the
USB key #2 to the aircraft Information Management System (IMS) (refer to AMP
BD500-A-J46-15-01-02AAA-752A-A).
3.7 Load the ECL configuration software file (refer to AMP BD500-A-
J46-15-00-02AAA-752A-A).
3.8 Make sure that the configuration file is correctly installed as follows:
3.8.1 On the maintenance panel in the flight compartment (pilot-side
bulkhead), set the AIRCRAFT switch to the MAINT position.
3.8.2 On the CCP, push the MENU pushbutton.
Note
The main menu is shown on the AFD.
3.8.3 From the main menu, click on DATA.
Note
The maintenance submenu is shown.
3.8.4 From the maintenance submenu, click on DBASE.
Note
The database status page is shown.
3.8.5 On the database status page, below the column STATUS/PART NO,
make sure that the ECL software part numbers agree with what is
shown in the Table 7.
3.9 Transfer the PFCC software file from the USB key #1 to the aircraft Information
Management System (IMS) (refer to AMP BD500-A-J46-15-01-02AAA-752A-A).

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3.10 Load the new PFCC application software file to the PFCC 1, PFCC 2 and
 PFCC 3 (refer to AMP BD500-A-J27-04-05-01AAA-750A-A).
3.11 Make sure that the PFCC application software and CRC check are as shown in
the Table 9 that follows (refer to AMP BD500-A-J27-04-05-01AAA-750A-A).
Table 9 PFCC Software Part Number
SYSTEM / APPLICATION SOFTWARE P/N REMARK
PFCC 1 810-0337-008 CRC: 0xE8C6D74E
PFCC 2 810-0337-008 CRC: 0xE8C6D74E
PFCC 3 810-0337-008 CRC: 0xE8C6D74E
3.12 Do the electronic Flight Control System (FCS) test (refer to AMP BD500-A-
J27-04-00-01AAA-343A-A).
3.13 Do the actuation FCS test (refer to AMP BD500-A-J27-04-00-02AAA-343A-A).
3.14 Make sure that there are no FCS EICAS, INFO, or OMS messages.
3.14.1 If any message is displayed, do troubleshooting.
3.15 Erase the PFCC Non Volatile Memory (NVM) as follows:
Note
If necssary, before you erase the NVM data from the PFCCs, the NVM data
can be dowloaded and saved as per the Aircraft Maintenance Publication
(AMP) procedures in the Table  that follows:
SYSTEM DESCRIPTION AMP
PFCC 1 NVM - Fault monitoring stor-
age readout (downloading)
BD500-A-J27-04-05-01AAA-551A-A
PFCC 2 NVM - Fault monitoring stor-
age readout (downloading)
BD500-A-J27-04-05-02AAA-551A-A
PFCC 3 NVM - Fault monitoring stor-
age readout (downloading)
BD500-A-J27-04-05-03AAA-551A-A
3.15.1 Erase the NVM of the PFCC No. 1 (refer to AMP BD500-A-
J27-04-05-01AAA-552A-A).
3.15.2 Erase the NVM of the PFCC No. 2 (refer to AMP BD500-A-
J27-04-05-01AAA-552A-A).
3.15.3 Erase the NVM of the PFCC No. 3 (refer to AMP BD500-A-
J27-04-05-01AAA-552A-A).
4 Job close-up
Note
The steps in the Job close-up section of this service bulletin, except for the return-
to-service tests, are recommended steps. The steps give a recommendation to
install components removed during the Job set-up. This recommendation is to

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End of data module
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make sure that the aircraft is safe and ready to return to service. Alternative steps
can be used at the discretion of the operator.
4.1 Remove all tools, equipment, and unwanted materials from the work area.
4.2 Close the mid avionic compartment door (refer to AMP BD500-A-
J52-43-00-01AAA-740A-A).
5 Administrative
When this service bulletin is completed, record in the applicable aircraft records that
you have completed this service bulletin.
Requirements after job completion
Required conditions
Table 10  Required conditions
Action/Condition Data Module/Technical publication
None

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