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

KA9 2RW, scotland.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

TRANSMITTAL FOR INSPECTION SERVICE BULLETIN REVISION

SERVICE BULLETIN No.ISB.53-167

DATE :

TITLE: FUSELAGE - FORWARD FUSELAGE EXTERNAL INSPECTIONS.

REVISION: 4

ACTION:

DATE:

27-JUN-2003

I

10-JUN-2010

FOR THOSE OPERATORS THAT HAVE PRE~IOUSLY RECEIVED THIS BULLETIN:

(1) Remove and destroy inspection service buLLetin revision No.

3.

(2) Insert inspection service buLLetin compLete at revision No.

4.

OVERVIEW OF CHANGE:

Inspection compliance revised.

The Airworthiness Directive consuLtation revised.

Drawing revised.

The changes in this reV1Slon have' no effect on aircraft that have

incorporated a previous issue of this service buLletin.

DETAILS OF CHANGE:

Para. 1.C., Inspection compLiance revised.

Para. 1.0., EASA Airworthiness Directive consuLtation revised.

Drawing 1, Note 1 revised to ZOOO Landings.

Date: 27-JUN-Z003

Revision: 4 10-JUN-2010

Printed in England

REVISION TRANSMITTAL SH~ET

ISB.53-1167

Page10fZ
BAE SYSTEMS

INSPECTION ~ERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

TRANSMITTAL FOR INSPECTION SERVICE BULLETIN REVISION

SERVICE BULLETIN No.ISB.53-167

This Page Is IntentionaLly Left BLank.

Date: 27-JUN-2003

Revision: 4 10-JUN-2010

Printed in England

REVISION TRANSMITTAL SHEET

158.53-167

Page2of2
BAE SYSTEMS (Operations) Limited, Prestwick International Airport, Ayrshire,

IN:::C:::: ::::t::d~ULLETIN

BAe 146 SERIES/AVRO 14~-RJ SERIES AIRCRAFT

TITLE: FUSELAGE - FORWARD FUSELAGE E~TERNAL INSPECTIONS.

1.Planning information

A.Effectivity

(1) Aircraft

Aircraft affected by this inspection are defined below

ALL BAe 146 100, 200, 300 Series

ALL AVRO 146-RJ7o, RJ85, RJ100 Series

B.Reason

Evidence of cracking has been reported along the edges of the

chemi-etched pockets in the frontl fuselage canopy skin panels

adjacent to the butt joint forward of frame 19. Subsequently,

cracking has been detected in oth~r front fuseLage skin paneLs

that contain chemi-etched pocketsl.

I

I

C.Description

It is necessary to perform an ext~rnal eddy current inspection of

the forward fuselage skin panels lin accordance with Appendix No.2

of this inspection service bulletin to locate cracks, and to

incorporate repairs in accordance: with an approved BAE SYSTEMS

Repair Design Office repair sche~e before further flight.

Revision 4 of this inspection se)lvice bulletin increases the

initial compliance period for the BAe 146 aircraft. The initial

compliance periods for the AVRO 1146-RJ aircraft remain unchanged

from revision 3.

D.Compliance

Operators are advised that this i'nspection service bulLetin at

revision 4 is the subject of EAS~ Airworthiness Directive

Consultation, this may result in.lthe supersedure or revision of I

EASA AD 2009-0070 associated with the service buLLetin at revision

2.

(1) For the BAe 146 aircraft, at the threshold and repeat

frequencies defined in Drawi~g 1 perform the external eddy

current inspections of the firont fuselage skin paneLs as

detailed in the Accomplishment Instructions of para.2.B.

(2 ) For the AVRO-RJ aircraft, at the

frequencies defined in DraWirg 2

threshold and repeat

perform the external eddy

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in EngLand

IS8.53-167

Page 1 of 10
BAE SYSTEMS

INSPECTION SIERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAfT

current inspections of the front fuseLage skin panels as

detailed in the AccompLishment Instructions of para.2.B.

(3) Before further flight, repair alL damage detected by

inspections performed in accordance with para.1.0.(1) and

para.1.D.(Z), as detaiLed in the AccompLishment Instructions

of para.2.B.

E.Approval

The technicaL information contained ;n this document has been

approved under the authority df EASA Part 21 ApprovaL No.

EASA.21J.047.

F .Manpower

Man-hours per aircraft

Preparation

Inspection

Tota l Man-hours

G.MateriaLs - cost and avaiLability

Not applicabLe.

H.Tooling - cost and availability

Not applicable.

I.Weight and balance

Not applicable.

J .References

Aircraft Maintenance ManuaL (AMM).

Structural Repair ManuaL (SRM).

K.Publications affected

Not applicable.

L.ELectr;cal load data

Not applicable.

Date; 27-JUN-2003

Revision: 410-JUN-2010

Printed in England

2-00

32-00

34-00

156.53-167

Page 2 of 10
BAE SYSTEMS

INSPECTION SERV~CE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

2.Accomplishment instructions

A.Preparation

(1) The foLLowing abbreviations are used within this document.

A~M (Aircraft Maintenance Manual'.

SRM (Structural Repair Manurl).

(2 ) Observe appropriate safety precautions

I

in the AMM.

B,Inspection

(1)

(2 )

With reference to Appendix 2~ review the aircraft buiLd

standard records to determine the modification standard of

the forward fuseLage etched skins.

Perform an Eddy Current Insplction in accordance with Logic

diagram Drawing NO.1 for BAel146 aircraft or Logic diagram

Drawing NO.2 for Avro 146-RJ aircraft in the areas detailed

in Appendix 2 Drawings 1 to 9 incLusive.

(3) Refer to Appendix 2 (ISB.53-167ap2) for Inspection

procedures.

(4) Repair any cracks found in atcordance ~ith an approved BAE

SYSTEMS Repair Design Office repair scheme before further

flight.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in EngLand

15B.53-167

Page 3 of 10
BAE SYSTEMS

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

NOSE SKIN PANEL INSPECTION FOR

RAE 146 AIRCRAFT

AS DEFINED IN APPENDIX:2

INSPECT IN

ACCORDANce

wn"

APPENDIX 2

AT OR BEFORE

1&.000

lANOINGS OR

see NOTE 1

WHICHEVER

IS THE LATER

,

ORAWINGS

1 AND 0

INSPECT IN

ACCORDANCE

wm<

APPENOIX 2

AT OR BEFORE

111,000

LANDINGS OR

see NOTE 1

WHICHEVER

IS THE LATER

DRAWINGS

2,3.4,5AND7

, YES

INSPECT WITHIN

4.600 LANDINGS OF

LAST INSPECTION

OR WITHIN

2,000 LANDINGS

WHICHEVER IS

THE LATER

REPEAT

INSPECTION

IN ACCORDANCE

WITH APPENOI)(' 2

EVERY 4,&00

LANDINGS

, YES

INSPECT IN

ACCORDANCE

wm<

APPENClX 2

WITHIN 2,000

LANDINGS

n,

"'SPEer WITHIN

3,600 LA,NDINGS OF

LAST INSPECTION

OR WITHIN

2,000 LANDINGS

WHICHEVER IS

THE LATER

REPEAT

INSPECTION

IN ACCORDANCE

IIIIITHAPPENDIX:2

eVERY 3,&00

LANDINGS

~> WITHIN 2,000 LANDINGS FROM THE EFFECTIVe DATE OF A SUPERSEDURE AIRWORTHINESS

DIRECTIVe REPLACING EASA AD 2ODIHI070 (9 APRIL ZOOS)

lOGIC

Date: 27-JUN-2003

Revis;on: 410-JUN-2010

DIAGRA~ - BAE 146 AIRCRAFT

DRAWING 1.(Rev;sed)

Printed in EngLand

ISB.53-167

Page 4 of 10
BAE SYSTEMSI

INSPECTION SER~ICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

INSPECT IN

ACCORDANCE

WITH

APPENDIX 2

AT OR BEFORE

10,000

LANDINGS OR

SEe NOTE'

WHICHEVER

1$ THE LATER

'"

INSPECT IN

ACCORDANCE WITH

APPENDIX 2 WITHIN

3.000 LANDINGS OF

LAST INSPECTION

OR WITHIN

, ,000 LANDINGS

WHICHEVER IS

THE LATER

REPEAT

INSPECTION

IN ACCORDANCE

WITH APPENDIX 2

eVERY 3.000

LANDINGS

INSPECT IN

ACCORDANCE

WITH

APPENDIX 2

AlOR BEFORE

10,000

LANDINGS OR

see NOTE 1

WHICHEVER

IS THE LATER

'"

INSPECTilN

ACCOROAN

1

CE

WITH

APPENDIX 2

WITHIN 1,000

LANDINGS,

INSPECT

'"IN

ACCORDANCE WITH

APPENDIX 2 WITHIN

2,400 LANOINGS OF

LAST INSPECTION

OR WITHIN

1,000 LANDINGS

WHICHEVER IS

THE LATER

REPEAT

INSPECTION

IN ACCORDANCE

WITH APPENOIX 2

EVERY 2,400

LANDINGS

WITHIN 1.000 LANDINGS FROM THE EFFECTIVE OATE OF A SUPERSEDURE AIRWORTHINESS

DIRECTIVE REPLACING EASA AD 2009-{)070 (9 APRIL 2009)

N53167D5

lOGIC DIAGRAM - AVRO 146-RJ AIRCRAFT

DRAWING 2.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in EngLand

15B.53-167

PageSof10
BAE SYSTEMS

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

(.Terminating action

(1) At the issue date of reV1S1on 2, no terminating action exists

for the repeat inspections required by this inspection

service bulletin.

D.Documentat;on

(1) Report findings, including nil defects, using attached

inspection report sheet to:-

Customer Liaison,

Customer Support (Building 37),

BAE SYSTEMS (Operations) Limited,

Prestw;ck International Airport,

Ayr,

KA9 2RW,

Scot Land.

FAX: +44 (0) 1292 675432

(2) Record the accomplishment of this Inspection ;n the

aircraft's technical records.

E.CLosing Action

Not applicable.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in England

15B.53-167

Page 6 of 10
BAE SYSTEMS:

INSPECTION SERV~CE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

3.Material information

Not applicable.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in England

158.53-167

Page7of10
BAE SYSTEMS

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

This Page Is IntentionaLLy left Blank.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in England

15B.53-167

Page8ofl0
BAE SYSTEMS I

INSPECTION sERJrcE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENLx 1

1.INSPECTION REPORT

A.Complete and return this form as

OPERATOR:

AIRCRAFT REGISTRATlON:

CONSTRUCTORS NUMBER:

FLIGHT HOURS;

LANDINGS:

DATE INSPECTION PERFORMED:

FINDINGS:

detai led

I

I

To: Customer Technical Support (Building 37),

BAE SYSTEMS (Operations) Limited,

Prest~ick International Airport,

Ayrshire,

KA9 2RItI,

Scotland.

~ax t 44 (0) 1292 675432

e-ma iL r a eog l ia ison@baesystems.com

Date: 27-JUN-2003

Revislon: 410-JUN-2010

Printed in EngLand

158.53-167

Page90f10
BAE SYSTEMS

INSPECTION S~RVICE BULLETIN

BAa 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

This Page Is Intentionally Left BlanK.

Date: 27-JUN-2003 158.53-167

Revision: 410-JUN-2010 Page10of10

Printed in England
BAE SYSTEMS (Operations) Limited, Prestwicf International Airport, Ayrshire,

KA9 2RW, scot~and.

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

TITLE: EDDY CURRENT INSTRUCTION FOR THE EXAMINATION OF 146/RJ

AIRCRAFT - NOSE SKIN PANELS.

1.PROCEDURE

A .Reason

This low frequency phase anaLysis eddy current inspection

instruction has been produced to ~etect cracks 0.50in. (12.70mm)

or greater in length that lie O'~116in. (0.40mm) or less below the

outer surface of the nose section skin panels. It is anticipated

that cracks will propagate along '['thechange in section at the edge

of the etched pockets.

This instruction covers the nose Iskin panels in the following

areas: I

(1) Aft nose. I

(2) Keel.

0) Drum.

(4) Canopy roof.

(5) Side.

(6) Masking.

B.COMPONENT OR AREA TO BE INSPECTED

(1) Fuselage nose skin panels:-

(a) Aft nose:

Pre and post MOD HCC0537I - Drawing 1.

Canopy roof:-

Skin modifications

Drawing 7.

(d)

(b) Keel:

Pre and post MOD HCM00528C[ - Drawing 2.

(c) Drum:

Pre and post MOD HCMOOS03A, HCMOOS28C, HCM01082A, HCM01077A

and HCM01281A - Drawing 31 Drawing 4 and Drawing 5.

[

HCM00503A and HCM00700A - Drawing 6 and

[

(e) Side skins Ref.SRM 53-10-12 Fig 3 , Drawing 8 (chemi-etched

pockets fwd of Frame 9 ar~ not included).

I

(f) Masking skin Ref.SRM 53-10-12 Fig 7 , Drawing 9.

Date: 27-JUN-2003

Revision: 410-JUN-2010

rSB.53-167ap2

Page 1 of 22

Printed in England
BAE SYSTEMS

INSPECTION S~RVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

NOTE :

1.There is no requirement to inspect the aft nose, side

skin and keel skin paneLs forward of frame 9 within

this inspection service buLletin.

2.Refer to aircraft IbuiLd standard records to determine

the modification status of aircraft skins before

starting the ;nsp~ct;on, as the shape of the etched

pockets change de~end;ng upon the modification status

of the skin panels.

(.DESCRIPTION OF POSSIBLE DAMAGE

(1) Cracks 0.50in. (12.70mm) or greater in length that lie

0.016;n. (O.40mm) or Less beLow the outer surface of the

skin. It ;s anticipated that cracks wilt propagate aLong the

change in section at the edge of the etched pockets.

D.RELATED DOCUMENTS

(1)

(2 )

(3)

HTM Part 1, Chapter 20-00-00, Section 3.

NTM Part 6, Chapter 20-00100, Eddy Current Testing - General.

Test instrument manufacturer's handbook.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in EngLand

ISB.53-167ap2

Page 2 of 22
BAE SYSTEMS

INSPECTION SERV~CE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

E.EQUIPMENT AND MATERIALS

The following equipment Listed in TabLe

development of thlS instructr"on and was

acceptable.

Table 1.

I

1 was used during

found to be

Instrument: ELatest Blv4 phase anaLysis eddy current instrument, with ,

81-RS adapter, ~rom Rohmann (UK) ltd.

Probe: Absolute shield~d probe with ferrite core, 500Hz-250KHz

Part number KASI42-SE, from Rohmann {UK LTD. (Ref.Drawing

12l.

lead: Part number EK~2-HF/l, from Rohmann (UK) Ltd.

,

CaLibration Standard: ALuminium blocklwitn 0.040;n. (l.Omm) sLot Part number

29A029 from Hoc,king NDT Ltd. ( Ref. NTMPart 6, 20-00-00l.

Additional ~ateriaL

"

Non-conductive ~hlm 0.008in. (0.20m~) thick, 25mm wide by

50mm long (for ~xample, radiographic film).

Additional Material 1, Non-conductive probe guides, such as a plastic rule and

drawing curves.[

NOTE ; --

1.Any comparable eddy current equlpment may be used

provided it satisfieJ the requirements of this

instruction and is c~pable of resolving the slot in

the ~a~i~ration stanlard at the required level of

sensltlvlty.

2.It is important that a probe such as the KAS 42-SE is

used, as its compact eddy current field is unaffected

by the proximity of ~ivets to the etched pockets.

F.PREPARATION FOR INSPECTION

(1) Refer to the Aircraft Maintenance Manual (AMM) for

preparation of the fOllOWingl items:

(a) Ensure that a safe platform is provided to work on the

canopy roof. I

(b) Ensure that the area of 1 spectlon is smooth, clean and

free from flaking paint.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in Engl~nd

ISB.53-167ap2

Page 3 of 22
BAE SYSTEMS

INSPECTION S~RVICE BULLETIN

BAe 146 SERIES/AVROI146-RJ SERIES AIRCRAFT

APPENDIX 2

G.INSTRUMENT CALIBRATION

[

(1) Calibration Settings as shown in Table 2

Table 2.

Initial Settings: Refer to manufacturer's instructions.

I

Al arm: Optional - refe~ to manufacturer's instructions

Frequency: Mapping Frequency - Set to 10 kH,

I

Inspection Freq~ency - Set to 25 kHz

Gain: Set to produce ~equired sensitivity

Pre-amp - 10 dB

y spread - 20 dB

, spread - o dB I

Filter Band - Set to Static

I

High pass - Set Ito Off

L" pass - Set to 10 Hz

Bandwidth Limiter S,t to OFF I

Time,base I Di splay ",

Dot Position Refer to Drawing 10.

I

(2) Sensitivity Settings.

(a) Select appropriate instrument frequency (Refer to Table 2).

(b) Place non-conductive shim on calibration standard.

(c) Place probe on top of shim away from slots and baLance

instrument.

(d) Set lift-off effect to horizontal and to left.

(e) Slide probe over 1.0mm (0.04in.) slot and adjust vertical

spot (Y/X) display to achieve displacement of 3 screen

divisions (Refer to Drkwing 10).

Date: 27-JUN-2003

Revision: 410-JUN-2010

Print/!d in EngLand

ISB.53-167ap2

P'age4 of 22
BAE SYSTEMS I

INSPECTION SERV~CE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

NOTE: Development trials at this sensitivity indicate a crack

measuring 0.50;n. (12.~Omm) 1n length, 0.0161n. (0.40mm)

below the outer surfac~ of the skin wiLL produce a

vertical spot (V/X) displacement of 3 screen divisions

(Refer to Drawing 10).

H.INSPECTION PROCEDURE

(1) Mapping Etched Pockets.

(a) Set instrument frequency at 10kHz and adjust sensitivity

settings.

(b) Place probe on skin in ce~tre of etched pocket and balance

instrument (Refs. Drawing 1 to Drawing 9).

(c) Adjust lift off signal to horizontal and to left.

Cd)

(e)

Scan probe toward change in skin section and mark skin at

forward edge of probe whe~ vertical spot movement of 1

division is indicated (Refer to Drawing 11).

Once sufficient points hale been marked, draw outline of

etched pocket on skin. I

(2) Inspection Method.

(, )

(b)

I Set instrument frequency at 25kHz and adjust sensitivity

settings. I

Place probe on skin adjacent to etched pocket and balance

inst rument.

(c) Adjust lift off signal to horizontal and to Left.

(d) Perform 3 scans parallel to change in skin section as shown

in Drawing 11, and observ~ alL signaL responses.

NOTE: A non-conductive guide jShould be used to ensure the

scans are parallel to the change in skin section.

I.ACCEPTANCE CRITERIA

(1) Interpretation

(a) Any indication with a raP1d verticaL displacement and

amplitude equal to or greater than one screen division that

cannot be attributed to p~obe handling or component

geometry shall be conside1ed as a crack.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in EngLand

ISB.53-167ap2

Page 5 of 22
BAE SYSTEMS

INSPECTION S~RVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

NOTE :

1.Cracks and other discrete surface damage are usually

identified by a rapid vertical spot dispLacement away

from the baLanced position. However, once the crack or

damage ;s passed the spot returns to the balanced

position.

2.A smooth gradual ~pot movement is a common occurrence,

which can happen ~or a variety of reasons, such as

paint thickness (lift-off), edge effect (geometry) and

conductivity changes.

(2) Reporting I Repair I Rect1fication.

(a) ALL cracks and discontinuities are to be recorded in the

reLevant aircraft docu~entat;on and repaired in accordance

with an approved BAE SYSTEMS Repair Design Office repair

scheme before further flight.

NOTE: The word discontinui!ty is a generic term for faults such

as cracks, corrosion and mechanical damage.

J.REPORTING PROCEDURE

(1) Report aLL cracks and I or discontinuities

Customer Liaison Engineering

BAE SYSTEMS I

Regional Aircraft,

Prestwick International Airport,

Ayrshire, KA9 2RW

Scotland.

to:

(2 ) Also send the following information:

Aircraft constructors nu1lber.

Aircraft registration.

Flying hours and number of landings.

S_S.I. Number.

Location I length of crack or discontinuity I signaL

amplitude per cent fSH.

K.ADDITIONAL INFORMATION

(1) Ensure all test equipment ;s removed from aircraft after

final inspection.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Print~d in England

ISB.53-167ap2

Page 6 of 22
BAE SYSTEMS

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

S>N

105.525

C"

,

I

C"

,

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C"

"

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n

I

eo

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,

,

,

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STN

170.925

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,

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INSPECT SKIN

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- LAPB·lEFT

LAP F· RIGHT

0.056;n

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O.036;n

(O.9mm}

TYPICAL

[KJ

VIEW,ON OUTE~ SKIN

LEFT SHOWN

RIGHT SIMILAR

I

SECTION '8-8'

LOCATION OF ETCHED POCKETS - AFT NOSE PANEL

DRAWING 1.

N53167AP201

Date: 27-JUN-2003

Revision: 410-JUN-2010

ISB.53-167ap2

Page 7 of 22

Printed in England
BAE SYSTEMS

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

'---' ,----

: :

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: ~---;'-

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-LAPD

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O.OJ6in (O.9mm) PRE MOD HCM0052aC

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VIEW ON OUTER SKIN

RIGHT SIDE 0.056in

(1.4mm)

SECTION 'O-D'

TYPICAL

NOTE- INSPECT SKIN AFT OF FRAME 9

N53167,o,P202

LOCATION OF ETCHED PqCKETS - KEEL SKIN PANELS

DRAWING 2.

Date: 27-JUN-2003

Revision: 410-JUN-2010

ISB.S3-167ap2

Page 8 of 22

Printed in England
BAE SYSTEMS ,

I

INSPECTION SERV~CE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

F

0

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QH

LAP E

·29H

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LAP G

N531037AP203

LAP G

PANELS

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FR18--

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r········,················

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PRE MOO HCM0050JA ..J

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FR 16

FR17--

FR 14

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VIEW ON ARROW 'F'

ETCHEDo:AowCrKNEtTS3.-DRUM SKIN

FWD

LOCATION OF

O.OJ6in

1

/

(O.9mm)

FR 14

1

(l.056;" FR 15

(l.4mm)

SECTION 'J~J' FR 16 I

TYPICAL []

FR17--

FR18-- I

' T,

FR19- '.~-

I

I LAP H

Date: 27-JUN-2003

Revision; 410-JUN-2010

ISB.53-167ap2

Page 9 of 22

Printed in England
BAE SYSTEMS

INSPECTION S~RVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAfT

APPENDIX 2

O,056;n

(l.4mm)

O.0391n

(1.0mm)

Lil E lA\ C

FR14 ~ ,"' . .. ..•. ,.•.•.• _._ .

FR 15 - ,~:-_-_:::- .::· :- __:I~-:::--::::::::::.-:.-

FR16 - :.1 .', :-

,- 'I ""'" """" "': Ii"''''''''"'" ": FR 17 - '--,_. __ . ... :,~ ... __ •• ._' -

:::: =+----;;;;-;;-;-::~:;;-njl;::;

I POST MOO HCM00528C ~

K

FWD

SECTION 'K·K'

TYPICAL LAP E

FR14 ~I

LAP C

\

, ,.._--------------,

FR 11i ~ .~ . .'I: . ... ', -

FR16 - ,I, '

FR 17 _ ij~)--- ~~:-·!'C~~~~-O}

FR 18 - Cr.1 _...,. ..-.: I [:_-~~_-_-_-~ ,.---, -

m 19- ~~(- ~~~~~~~~~~:f:::::::-:'!I::f:: -

POST MOD HCM01082A K

--'

VIEW ON ARROW 'G'

LOCATION' OF ETCHED POCKETS - DRUM SKIN PANELS

DRAWING 4.

N53167AP204

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in England

ISB.53-167ap2

Page 10 of 22
BAE SYSTEMS

INSPECTION SERv'ICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

INSPECT THE FOUR POCKETS

ADJACENT TO lAP H

'R 'R L

" "

'R 'R I "

'R

I

H 'R LAPH _

I

,. I

"

I "I

-' '" - --..: :

... '--'.- .

"-"'-

O,OSS;n

(1.4mm)

O,036;n

(O.9rnm)

SECTION'L-L'

TYPICAL

"

L :'

LAPe __ Tl '---~:.:::.:.J:.:..:. ...:..:.:.; ..._....'... L:=J-\

VIEWONARROW'H'

INSPECT THE FIVE POCKETS

ADJACENT TO LAP C

N53167AP205

LOCATION OF ETCHED POCKETS - DRUM SKIN PANELS

DRAWING S.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in England

ISB.53-167ap2

Page 11 of 22
BAE SYSTEMS

INSPECTION S~RVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAfT

APPENDIX 2

M

D

'"

,

I

O,080in

2.0mm)

0.098in'- J

___(2.5~~ c _

FR

,

I

0,074;"

(1.9mm)

0,064;"

(1,6mm)

0.080in

(2.0mm)

-.:

,

,

,

,

,

,

FWD

0,10Bi"

(2.74mm)

0,074;0

<1,9mm)

PRE MOO HCM00700A

VIEW ON ARROW 'M •

POST MOD HCM00700A

N53167AP206

LOCATION OF ETCHED POCKETS - fORWARD CANOPY ROOF SKIN PANELS

DRAWING 6.

Date: 27-JUN-2003

Revision: 410-JUN-Z010

Printed in Engl&nd

ISB.53-167apZ

Page 12 of 22
BAE SYSTEMS

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

CR

"

I

,

,

,

,

,

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OR

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CR

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FWD

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,

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:: \ "- . , . '_ ..-'

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-------- '-'-_.-:--:-,------:---

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:::: :

,, '. ,

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:;--.-

/f , ,

PTJ ;.' I: .....-...

L....:.:,- (

p--l .

PRE MOD HCMOOSa3A POST MOD HCMOOS03A

O.1l56in

(1.<lmm)

O.039io

{1_0mm}

SECTION 'p-p'

TYPICAL

VIEW ON ARROW 'N'

0.019'0

(2.0mm)

SECTION 'Q.Q'

TYPICAL N$3161AP201

LOCATION OF ETCHED POCKETS - AFT CANOPY ROOF SKIN PANELS

DRAWING 7.

Date: 27-JUN-2003

Revision: 410-JUN-2010

ISB.53-167ap2

Page 13 of 22

Printed in England
BAE SYSTEMS

INSPECTION S~RVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

D

0_OJ6in

(O.90mm)

t

+

0.057in

(1.40mm)

I

cr=;, ,

'== +

SECTION 'A-A'

PRE MODS HCt.l4l1086A OR BAND HCM400JaJ

POST MOO HCM400JaJ

,wo

LAPCI

<ON

170.925

NOTE, INSPECT SKIN AFT OF FRAME 9

VIEW LDpKING OUTBOARD

ON LEFT SlOE

FRAME 9

/

'"

I

" "

I

"

I

LAPF

,r ,c ,rlr I"

¢

-); ;1 II U______SKIN

roo JLJi \. _..1

Ii

\.~

iUn"-J

UP<

I

VIEW LOOKING OUTBOARO

ON RIGHT SlOE

<ON

110.925

,.,5316107

LOCATION OF ETCHED POCKETS - SIDE SKINS

DRAWING 8.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in Engllnd

ISB.53-167ap2

Page14of22
BAE SYSTEMSI

INSPECTION SERV~CE BULLETIN

BAe 146 SERlfS/AVRO 149-RJ SERIES AIRCRAFT

APPENDIX 2

FRAME 13

I

,

I

FRAME 12

,

,

,

,

,

, ,

: O.039in I

1(1.0mm) I

, '

, '

, '

'- )

::.-~

--,

,

--

,

,

,

,

,

I O.069in

I (1.75mm)

,

,

,

,

,

,

/

I

,

,

FRAME 9

NOTE: INSPECT SKIN AFT OF FRAME 9

N531570e

lOCATION OF ETCHED POCKETS - REAR MASKING SKIN

DRAWING 9.

Date: 27-JUN-2003

Revision: 410-JUN-2010

ISB.53-167ap2

Page150f22

Printed in England
BAE SYSTEMS

INSPECTION S~RVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

NON.cONOUCTIVE MATERIAL

0.008'n (O.2mm) THIC

+1-0.001;" (O.025mm)

-_·-I--·-~---1--·-i-· CALIBRATION SIGNAL -]I:::~ T"",",V'''O",

X BALANCE POSITION

I

I

TYPICAL ELOTE5T 8104 SCREEN DISPLAY

0.040in (1.0mm) SLOT IN, CALIBRATION STANDARD

WITH 0.008in (D.2mm) NON-CONDUCTIVE SHIM

: : J :

"---~---f----:---·":·-·I--··:--

_:~::~:::;:::: r -_ .. :. - - -I - _ .. ~ -:: ~_::::: _. "r-'

,

25% FSH

50% FSH

75% FSH

LIFT OFF

----~---.---- ..- -.- , ,

, ,

. ,

- - - -~...~-_ ..~- - - -~- --

75% FSH

50% FSH

25% FSH

, I

."--~--_.~.._.~.-

':1 , --]

----.- - - -, - - --, - - -.' - -] -, ....i· ..~.

CRACK SIGNAL

THREE DIVISIONS

OR GREATER

- - .-:...-~- - - -;--

, , .

-- --r' _.,. ---r'-

, ,

)1 ----t----~-_·

,

---,----, .._-

X BALANCE POSITION

LIFT OFF

I

I

TYPICAL ELOTEST B1 "4 SCREEN DISPLAY

0.5in (12,7m",) LONG CRACK

0,0161n (OAmm) BELOW THEjOUTER SURFACE OF THE SKIN

INSTRUHEN~ CALIBRATION

DRAWING 10.

N53167A,P:J0-S

Date: 27-JUN-2003

Revision: 410-JUN-2010

ISB.53-167ap2

Page 16 of 22

Printed in England
BAE SYSTEMS,

INSPECTION SER~ICE BULLETIN

BAe 146 SERIES/AVRO 14~-RJ SERIES AIRCRAFT

APPENDIX 2

RIVET LINE

I

,

I

,

o

CHANGE IN SKIN SECTION AT

EOGE Of ECHEO POCKET

: PROBE

o 0

MARK SKIN AT FORWARD EDGE OF PROBE ~

WHEN A VERTICAL SPOT MOVEMENT 0 •

OF 1 DIVISION IS PRODUCED DIRECTION

Of SCAN

o

I

PROBE

CHANGE IN SKIN SECTION AT

EDGE OF ECHED POCKET

I

DIRECTION

OF SCAN

! 'AS42_5lO

'AS

42-5lO

EXTERNAL

SURFACE OF SKIN

SCAN 2 ! SCAN 3

I

,

I

,

I

SCAN 1

I

SECTION THROUGJ SKIN

:E:;~~~:~~~~'~~:':::::~~~"DT~E PARALLEL TO THE CHANGE IN SKIN SECTION T~:E~H::~~;~::,1:~c;~:~:;;~:~~~~:,;~~~~CH

I

'Dcm N53167AP209

IDENTIFYING THE CHANGE IN SECTION AT THE EDGE OF THE ETCHED POCKETS

AND TYPICAL SCAN PATTERNS-INSPECTION OF ETCHED POCKETS

DRAWING 11.

Date: 27-JUN-2003

Revision: 410-JUN-2010

ISB.53-167ap2

Page 170f 22

Printed in EngLand
BAE SYSTEMS

I

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

APPENDIX 2

MANUFACTURE:

PART NUMBER:

COIL SYSTEM:

FREQUENCY RANGE;

CONNECTOR:

ROHMANN LTD

KA$42-5E I

ABSOLUTJ:: SHIELDED COIL WITH FERRITE CORE

500Hz· 250kHz

meHER I'IN

O.lgin

(ZOmm)

0,85in

(215mm)

0.39in

(10mm)

DIA PROBE FACE

FISCHER 4 PIN

CONNECTOR

N531S7AP210

EDDY CURRENT PROBE DETAILS

DRAWlING 12.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in England

ISB.53-167ap2

Page18of22
BAE SYSTEMS

INSPECTION SER~ICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

2.ACCOMPLISHMENT INSTRUCTIONS

None.

Date: 27-JUN-2003

Revision: 410-JUN-Z010

Printed in England

APPENDIX 2

ISB.53-167ap2

Page190f22
BAE SYSTEMS

INSPECTION Sl RVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

This Page Is IntentionaLly Left Blank.

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed In England

ISB.53-167ap2

Page 20 of 22
BAE SYSTEMS

INSPECTION SERVICE BULLETIN

BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

3.MATERIAl INfORMATION

None

Date: 27-JUN-2003

Revision: 410-JUN-2010

Printed in England

APPENDIX 2

ISB.53-167ap2

Page 21 of 22
BAE SYSTEMS

INSPECTION 51 RVICE BULLETIN

BA. 146 SERIES/AV'O [146-RJ SERIES AIRCRAFT

This Page Is Intentionally Left Blank.

Date: 27-JUN-2003 ISB.53-167ap2

Revision: 410-JUN-2010 Page 22 of 22

Printed in England