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 Page2of2BAE 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 linaccordance 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 1of 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 2of 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 3of 10

## BAE SYSTEMS INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT

NOSE SKIN PANEL INSPECTION FOR

RAE 146AIRCRAFT AS DEFINED INAPPENDIX:2

INSPECT IN ACCORDANce wn" APPENDIX 2 AT OR BEFORE 1&.000 lANOINGS OR see NOTE 1 WHICHEVER ISTHE LATER 

# , ORAWINGS 1AND 0

INSPECT IN ACCORDANCE wm< APPENOIX 2 AT OR BEFORE 111,000 LANDINGS OR see NOTE 1 WHICHEVER ISTHE 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 INACCORDANCE 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 INACCORDANCE IIIIITHAPPENDIX:2 eVERY 3,&00 LANDINGS

~> WITHIN 2,000 LANDINGS FROM THE EFFECTIVe DATE OFASUPERSEDURE AIRWORTHINESS

DIRECTIVe REPLACING EASA AD 2ODIHI070 (9APRIL 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 4of 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 SEeNOTE' WHICHEVER 1$THE LATER 

# '" INSPECT IN ACCORDANCE WITH APPENDIX 2WITHIN 3.000 LANDINGS OF LAST INSPECTION OR WITHIN
,,000 LANDINGS WHICHEVER IS THE LATER

REPEAT INSPECTION INACCORDANCE WITH APPENDIX 2 eVERY 3.000 LANDINGS INSPECT IN ACCORDANCE WITH APPENDIX 2 AlOR BEFORE 10,000 LANDINGS OR see NOTE 1 WHICHEVER ISTHE LATER 

# '" INSPECTilN ACCOROAN1 CE WITH APPENDIX 2 WITHIN 1,000 LANDINGS , 

# '" INSPECT IN ACCORDANCE WITH APPENDIX 2WITHIN 2,400 LANOINGS OF LAST INSPECTION OR WITHIN 1,000 LANDINGS WHICHEVER IS THE LATER

REPEAT INSPECTION INACCORDANCE WITH APPENOIX 2 EVERY 2,400 LANDINGS

WITHIN 1.000 LANDINGS FROM THE EFFECTIVE OATE OF ASUPERSEDURE AIRWORTHINESS DIRECTIVE REPLACING EASA AD 2009-{)070 (9APRIL 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 6of 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 raeogliaison@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 EnglandBAE 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 '['the change 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 1of 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 20-00

# 100, Eddy Current Testing
- General. Test instrument manufacturer's handbook.

Date: 27-JUN-2003 Revision: 410-JUN-2010 Printed in EngLand ISB.53-167ap2 Page 2of22

## 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 aplastic 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 3of 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 Alarm: 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 Display 

# ", 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'age4of22

## 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 instrument. (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 5of 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 6of22

## BAE SYSTEMS INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

### APPENDIX 2

S>N 105.525 C" 

# , I C"



# , I C" 

# " I

" C"

n I eo 

# " I

..."

## . .~--:
, ,, C" 

# " I STN

170.925 

# I LOWER

___ CANOPY RAIL

, , '
, ' 

# I INSPECT SKIN AFT OF FRAME 9 , '



# . ' ,

# "

,

# . , , ' , , , ' , , , ' , , ,: ' , :: B :: 

## :""",,) 

## :"'::}) ''-'--------

I , 

# I

# J.J I B - LAPB·lEFT LAPF· RIGHT

0.056;n (1.4mm) O.036;n (O.9mm} TYPICAL 

# [KJ VIEW,ON OUTE~ SKIN LEFTSHOWN 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 7of 22 Printed in England

## BAE SYSTEMS INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

### APPENDIX 2

'---',----:: " " 

# :~---; 

### '- , ,-- -LAPD 

## '" FR 170.925
" I I -lAPe

-.-. ,"', FR 

# " I 

### " " " "

"
"

### " 

### " "

"
" " " ",

"

### " -_.:: FR FR HI 11 I I

,.---

### -',: 

# ",04,
" .~ : I '.--_.'"-

### .,-..: 

# O.-J , , , " " 

### " ': " 

### " 

### :: 

# " 

# , f 

# " • I 

# " , I 

# " 

# II FR 

# • \

FR FR 

# • 

# , FR \ I 

# , FR

I 

# • I FR 

# , I 

# I 

# If] VIEW ON ai-JTER SKIN LEFTiSlDE FR 3I

FR 

# , \ FR 

# , I

FR 

# " I FR 

# " I FR 

# , I

AVIONICS DOOR CUT-OUT FR 

# " I 

# p

" "

"

### " :: 

### " ,--_.''.- 

# '" 170.925 FR I " LAPE_ I

LAPD- " "
" "

### " , " , , O.OJ6in(O.9mm) PRE MOD HCM0052aC

0.039;n (Hlmm) POST MOD HCM00528C 

## @] 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 8of 22 Printed in England

## BAE SYSTEMS
, I INSPECTION SERV~CE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

### APPENDIX 2
F 

# 0 D 

# QH
LAP E ·29H
I '''W O,"RROW'E' 

# D G

LAP G

N531037AP203 LAP G 

### PANELS

/ 

# \ I LAP H FR18-- FR19- 

# / I \

I r········,················ FR 15 

### ·:---···--·1·---··-----······', 

# L~·······:···.·.······ •••••• ~;. IL}: I J ' 

# T:':":["':'::'4:

I ' PRE MOO HCM0050JA 

# ..J J FR 16 FR17-- FR 14



## 'ICST MOD HCM00503A 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) I

SECTION 'J~J' FR 16 TYPICAL 

# [] FR17-- I FR 18-- 

# T

' , FR19- '.

### ~- 

# I I LAP H



### Date: 27-JUN-2003 Revision; 410-JUN-2010 ISB.53-167ap2 Page 9of 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) 

# LilE 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, ' FR17

_ 

# 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 10of22

## 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 TOLAP 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 11of 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 ONARROW '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 12of 22

## BAE SYSTEMS INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT 

### APPENDIX 2

CR 

# " I

,
, , , ,

" OR 

# " I r'--' :
, ,

### " " " " " " 

### " " :.• " " 

### ::

,

# ,

,, ,, ,, ,

# . ,, ,, ,, 

## .. .. " " " :

### : " -'~ ,

### .-----,

## . '

,' ,' :~ " " " "

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PRE MOD HCMOOSa3A POST MOD HCMOOS03A

O.1l56in (1.<lmm) O.039io {1_0mm}

SECTION'p-p' TYPICAL VIEW ONARROW '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 13of 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' PREMODS HCt.l4l1086AORBAND HCM400JaJ

POSTMOOHCM400JaJ

,wo

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FRAME 9 

# '" " " " / I I I LAPF 

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# ,c 

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# ¢ -); ;1 II 

# U

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# JLJi Ii 

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### "-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
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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 

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XBALANCE POSITION I

## I TYPICAL ELOTE5T 8104 SCREEN DISPLAY 0.040in (1.0mm) SLOT IN,CALIBRATION STANDARD WITH 0.008in (D.2mm) NON-CONDUCTIVE SHIM 

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0.5in (12,7m",) LONG CRACK 0,0161n (OAmm) BELOW THEjOUTER SURFACE OFTHE SKIN

INSTRUHEN~ CALIBRATION DRAWING 10. N53167A,P:J0-S

Date: 27-JUN-2003 Revision: 410-JUN-2010 ISB.53-167ap2 Page 16of 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 INSKIN SECTION AT

EOGE Of ECHEO POCKET

: PROBE 

# o 

# 0
MARK SKIN AT FORWARD EDGE OF PROBE ~ WHEN AVERTICAL SPOT MOVEMENT 

# 0 • OF 1 DIVISION ISPRODUCED DIRECTION Of SCAN 

# o I

PROBE CHANGE INSKIN SECTION AT EDGE OF ECHED POCKET

I DIRECTION OFSCAN 

# !
'AS 42_5lO 'AS 42-5lO

EXTERNAL

SURFACE OFSKIN SCAN 3 SCAN 2! I , I ,

# I SCAN 1

I

SECTION THROUGJ SKIN 

# :E:;~~~:~~~~'~~:':::::~~~"DT~E

T~:E~H::~~;~::,1:~c;~:~:;;~:~~~~:,;~~~~CHED

'Dcm
PARALLEL TOTHE CHANGE INSKIN SECTION I 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 4PIN 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 20of 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 

### 51RVICE 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 22of22 Printed in England