TITLE: WINGS - INSPECTION OF FORWARD PYLON PICK UP FITTINGS AT RIB 10

1.Planning information

A.Effectivity

(1) Aircraft

Aircraft affected by this inspection are defined below :-

All BAe 146 100, 200, 300 Series

All BAe 146-301 Series

All AVRO 146-RJ70, RJ85, RJ100 Series

Check the aircraft technical records for previous

accomplishment of this inspection.

B.Reason

Stress corrosion cracking has been discovered in the forward pylon

pick up fitting flanges at Rib 10. Failure of the Pylon Pick Up

Fittings could affect the Continued Airworthiness of the

Structure.

C.Description

(1) The existing Corrosion Prevention and Control Programme task

C57-500-05-01 will be superseded by this Inspection Service

Bulletin (ISB) when the service bulletin is subject to EASA

Airworthiness Directive action.

(2) It is necessary to carry out an inspection for stress

corrosion cracking of the forward pylon pick up fittings (top

and bottom) at Rib 10.

(3) Due to the low accessibility of the area, the use of a

videoscope is required (Ref: NTM Part 9, 20-09-01).

Work comprises:

- Position ground equipment for access to both left and right

outboard forward pylon pick up fittings.

- Display warning notices on flight deck prohibiting the use

of flying controls or engine controls.

- Remove Panels 454AB, 454AT, 484AB and 484AT.

- Perform a Special Detailed Inspection of the forward pylon

pick up fitting flanges at Rib 10.

BAE SYSTEMS (Operations) Limited, Prestwick International Airport, Ayrshire,

KA9 2RW, Scotland.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 1 of 14

Printed in England
- Re-fit Panels 454AB, 454AT, 484AB and 484AT.

- Remove ground equipment.

- Remove warning notices from flight deck.

- Complete and return Inspection Report Form (Appendix 1).

D.Compliance

The technical content of this ISB is the subject of EASA

AIRWORTHINESS DIRECTIVE consultation.

Compliance with this ISB is to be achieved as follows:

(1) The initial fatigue and environmental inspection must be

accomplished as shown below:

(a) Aircraft more than 15 years since entry into service at

receipt of this ISB:

- Inspections should be carried out in accordance with

para. 2 within 1 year of initial issue of this ISB.

(b) Aircraft between 14 and 15 years since entry into service

at receipt of this ISB:

- Inspections should be carried out in accordance with

para. 2 within 2 years of initial issue of this ISB, or

prior to achieving 16 years since entry into service,

whichever is the earlier.

(c) Aircraft less than 14 years since entry into service at

receipt of this ISB:

- Inspections should be carried out in accordance with

para. 2 within 2 years of initial issue of this ISB.

(d) For aircraft that have had a replacement forward pylon pick

up fitting installed inspections should be carried out in

accordance with para. 2 within 2 years of Revision 1 of

this ISB.

(2) Thereafter, repeat inspections in accordance with para. 2 at

an interval not to exceed 2 years.

E.Approval

The technical information contained in this document has been

approved under the authority of EASA Part 21 Approval No.

EASA.21J.047.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 2 of 14

Printed in England
F.Manpower

To inspect as defined in para.2-2 man-hours.

This man-hourestimate does not include time forgaining access

to, orcleaning the inspection area.

G.Materials - cost and availability

None.

H.Tooling - cost and availability

None.

I.Weight and balance

Not Affected.

J.References

Aircraft Maintenance Manual - Chapter 6 and Chapter 12

Non-Destructive Testing Manual - Part 9, 20-09-01

Structural Repair Manual - Chapter 51-00-00

K.Publications affected

Maintenance Review Board Report.

Maintenance Planning Document.

Corrosion Prevention and Control Programme.

NOTE: The MRBR, MPD and CPCP will be reviewed for inclusion of a

scheduled task. When the inspection requirements and

procedures of this service bulletin are published in the

MRBR, MPD and CPCP this ISB will be cancelled orrevised to

refer to the MRBR, MPD and CPCP as the EASA agreed published

sources.

L.Electrical load data

Not applicable.

M.Software accomplishment summary

No effect.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 3 of 14

Printed in England
N.Aircraft noise levels

No effect.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 4 of 14

Printed in England
2.Accomplishment instructions

A.General

(1) The following abbreviations are used within this document :-

AMM - Aircraft Maintenance Manual.

SRM - Structural Repair Manual.

MRBR - Maintenance Review Board Report.

NTM - Non Destructive Testing Manual.

CPCP - Corrosion Prevention and Control Manual.

(2) Observe all WARNINGS and CAUTIONS appearing in the Aircraft

Maintenance Manual.

B.Preparation

WARNING: WHENEVER ANY PART OF THE MAIN OR ASSOCIATED CONTROL SYSTEM

IS DISMANTLED, ADJUSTED, REPAIRED OR RENEWED, THAT PART OF

THE SYSTEM WHICH HAS BEEN DISTURBED SHALL BE SUBJECTED TO

A SECOND INDEPENDENT INSPECTION FOR SECURITY OF LOCKING

DEVICES, FULL AND FREE MOVEMENT, DIRECTION AND TENSION

CHECKS. THIS WORK MUST BE DONE IN ACCORDANCE WITH THE

ACCEPTABLE MEANS OF COMPLIANCE M.A. 402 (a) TO EASA PART

M, OR TO AN EQUIVALENT NATIONAL STANDARD.

WARNING: WHENEVER ANY PART OF THE MAIN OR ASSOCIATED CONTROL SYSTEM

IS DISMANTLED, ADJUSTED, REPAIRED OR RENEWED, THAT PART OF

THE SYSTEM WHICH HAS BEEN DISTURBED SHALL BE SUBJECTED TO

A DUPLICATED INSPECTION FOR SECURITY OF LOCKING DEVICES,

FULL AND FREE MOVEMENT, DIRECTION AND TENSION CHECKS, THE

COMPLETION OF THIS WORK SHALL BE CERTIFIED IN ACCORDANCE

WITH EASA Part 21 Approval No. EASA.21J.047.

(1) Display warning notices on flight deck prohibiting the use of

flying controls or engine controls.

(2) Referto AMM Chapter12 and position ground equipment for

access to both left and right outboard forward pylon pick up

fittings.

(3) Referto AMM Chapter06-40-00 and remove Panels 454AB, 454AT,

484AB and 484AT.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 5 of 14

Printed in England
C.Inspection

(1) Using a videoscope, perform a Special Detailed Inspection in

accordance with NTM Part 9, 20-09-01, for cracking, corrosion

and other defects of the Rib 10 forward pylon pick up fitting

flanges, especially the top and bottom flanges (see Drawing

1).

(2) Also check fittings for indicated signs of moisture ingress

between the mating surfaces.

(3) Rectify any defects found before further flight to an

approved BAE SYSTEMS repair scheme. Refer to SRM 51-00-00.

Re-protect the structure as required.

(4) Installation of replacement fittings will need to be

performed with guidance from BAE SYSTEMS Repair Design Office

on a case by case basis. Replacing a fitting may also involve

a skin repair.

(5) Make certain area is clean and clear of tools and

miscellaneous equipment.

D.Close up

(1) Re-fit Panels 454AB, 454AT, 484AB and 484AT.

(2) Remove ground equipment from inspection area.

(3) Remove warning notices on flight deck prohibiting the use of

flying controls or engine controls.

(4) Make certain work area is clean, and clear of tools and

miscellaneous equipment.

E.Test

None.

F.Documentation

(1) Record accomplishment of this inspection in the Aircraft

technical records.

G.Terminating action

None.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 6 of 14

Printed in England
FORWARD PYLON PICK UP FITTINGS AT RIB 10

DRAWING 1.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 7 of 14

Printed in England
This Page Is Intentionally Left Blank.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 8 of 14

Printed in England
3.Material information

A.Replacement Parts (if required)

Table 1.

Modification Status Assembly

(Replacement Part

to be Ordered)*

Description

Aircraft Pre

Modification

HCM0851A

HC574H0001-002** Bracket AB Assembly Port - Pre Mod HCM0851A

HC574H0001-004** Bracket CD Assembly Port - Pre Mod HCM0851A

HC574H0001-003** Bracket AB Assembly Stbd - Pre Mod HCM0851A

HC574H0001-005** Bracket CD Assembly Stbd - Pre Mod HCM0851A

Aircraft Post

Modification

HCM0851A

HC574H0053-002** Bracket AB Assembly Port - Mod HCM0851A

HC574H0053-004** Bracket CD Assembly Port - Mod HCM0851A

HC574H0053-003** Bracket AB Assembly Stbd - Mod HCM0851A

HC574H0053-005** Bracket CD Assembly Stbd - Mod HCM0851A

NOTE: * Replacement Parts should be ordered as matched pairs (ie

AB orCD). ** Mod HCM0851A brackets (HC574H0053-00X) can be

fitted in lieu of the Pre Mod HCM0851A brackets provided

additional actions are carried out as part of the

installation. Referto BAE Systems RepairDesign Office.

If replacement brackets are installed, their life must be tracked

in the aircraft records.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 9 of 14

Printed in England
This Page Is Intentionally Left Blank.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 10 of 14

Printed in England
APPENDIX 1

1.INSPECTION REPORT

A.Complete and return this form as detailed

OPERATOR:

AIRCRAFT REGISTRATION:

CONSTRUCTORS NUMBER:

FLIGHT HOURS:

LANDINGS:

DATE INSPECTION PERFORMED:

FINDINGS:

To: CustomerLiaison,

CustomerSupport (Building 37),

BAE SYSTEMS (Operations) Limited,

Prestwick International Airport,

Ayr,

KA9 2RW,

Scotland.

Fax + 44 (0) 1292 675432

e-mail raengliaison@baesystems.com

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 11 of 14

Printed in England
This Page Is Intentionally Left Blank.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 12 of 14

Printed in England
APPENDIX 2

1.CONTINUED AIRWORTHINESS INSTRUCTIONS

(1) There are no continued airworthiness instructions applicable

to this service bulletin.

A.Scheduled Maintenance

(1) None.

B.Removal Procedures

(1) None.

C.Installation Procedures

(1) None.

D.Test Procedures

(1) None.

E.Troubleshooting

(1) None.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 13 of 14

Printed in England
This Page Is Intentionally Left Blank.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

Date: 06-SEP-2010 ISB.57-073

Revision: 1 27-JAN-2012 Page 14 of 14

Printed in England