# BAE Systems Service Bulletin 32-JA090240: Revision 1

- Rights: © BAE Systems. Filed by the FAA in regulations.gov docket FAA-2011-0230; AD 2011-11-01 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [BAE Systems Service Bulletin 32-JA090240](https://openairdocs.org/service-documents/bae-systems/32-ja090240.md)
- Title as filed: U.S. DOT/FAA - Service Bulletin (3)
- Pages: 21
- PDF: https://openairdocs.org/files/sha256/ec/ea/eceac1e4727b9ab96664919885cecf70135f06046c7a710c4f82ca014633c4ae
- Page: https://openairdocs.org/service-documents/bae-systems/32-ja090240/file/eceac1e4727b

## Text

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### Page 1 (OCR)

BRITISH AERO SPAC
JETSTREAM
SERIES 3100 & 3200
SERVICE BULLETIN
SERVICE BULLETIN
BAE SYSTEMS,
PRESTWICK INTERNATIONAL AIRPORT,
AYRSHIRE, KA9 2RW,
SCOTLAND.
32-JA090240
WINGS - INSPECTION OF MAIN UNDERCARRIAGE FITTING.
INSPECTION
1. PLANNING INFORMATION
A.  Effectivity
All HP 137 Mk 1, Jetstream series 200, Jetstream series 3100 and Jetstream series
3200 aircraft, which are post modification JM5218 or post modification JM8003.
B.  Reason
As a result of the fatigue testing programme on the Jetstream fatigue test specimen,
cracks have been found on the post modification standard of main undercarriage fitting
(part no. 1379133B1/2/3/4). Analysis of this failure indicates that an inspection regime
will have to be implemented in order to ensure that the fitting can continue to be used
beyond 41,000 landings.
C.  Description
A Non-Destructive Test Examination is carried out on the main landing gear pivot beam
attachment fastener bores.
This service bulletin has an effect on the main landing gear.
The tasks are as follows:
Make aircraft safe for servicing.
Jack aircraft.
Remove main undercarriage legs.
Carry out NDT examination.
Report any cracks or discontinuities.
Install main undercarriage legs.
Test main undercarriage system.
Lower aircraft from jacks.
Amend aircraft records.
ORIGINAL ISSUE: 29/04/09  32-JA090240
PAGE 1
BAE SYSTEMS (Operations) Limited
Printed in the U.K.

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JETSTREAM  BRITISH
SERIES 3100 & 3200
SERVICE BULLETIN
D.  Manpower
16 manhours.
Mechanical skills are necessary.
E.  Material - Cost and Availability
None
F.  Tooling - Price and Availability
The equipment necessary to accomplish this service bulletin is listed in Para 2.B. and in
report number STR/J32/085 (BAE/MAN/J32/EDD/17).
G.  Weight and Balance
None.
H.  Aircraft Noise Levels
Aircraft noise is not affected.
Electrical Load Data
Not affected.
J.  Software Accomplishment Summary
Not applicable.
K. References
Aircraft Maintenance Manual, Chapter 32.
Report Number: STR/JS32/085.
Service Bulletin 05-JA 010642.
L. Publications Affected
NOTE: The maintenance review board report and maintenance planning document will
be reviewed, for possible inclusion of a scheduled maintenance task.
Operators are requested to advise The Project Manager, Airline Maintenance &
Fublication Services, BAE SYSTEMS, Regional Aircraft, Prestwick International Airport,
Ayrshire, KA9 2RW, SCOTLAND, of the accomplishment of this service bulletin.
M.  Family Tree Of Modification Relationships
Not applicable.
ORIGINAL ISSUE: 29/04/09  32-JA090240
PAGE 2
BAE SYSTEMS (Operations) Limited.
Printed in the U.K.

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RITISH AEROSPAC
JETSTREAM
SERIES 3100 & 3200
SERVICE BULLETIN
N.  Approval
A threshold inspection of the main undercarriage fitting should be made at 41,000
landings with a repeat inspection every 27,000 landings. Any aircraft in excess of
39,000 landings must inspect within a period of 2000 landings.
NOTE:  The accumulated landings for the main undercarriage fitting should be
evaluated using Para 2.A.
The technical content of this service bulletin is the subject of EASA Airworthiness
Directive consultation, and is approved under the authority of Design Organisation
Approval No. EASA.21J.047.
Signed
Date  30/419
EASA Part 21 Approval EASA:21J.047.
ORIGINAL ISSUE: 29/04/09  32-JA090240
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BAE SYSTEMS (Operations) Limited
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BRITISH AEROSPAC
JETSTREAM
SERİES 3100 & 3200
SERVICE BULLETIN
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ORIGINAL ISSUE: 29/04/09  32-JA090240
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BAE SYSTEMS (Operations) Limited.
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FRITISH AEROSPACE
JETSTREAM
SERIES 7100 & 3200
SERVICE BULLETIN
2.  ACCOMPLISHMENT INSTRUCTIONS
DUPLICATE INSPECTION
WHENEVER ANY PART OF THIS SYSTEM IS DISMANTLED, ADJUSTED, REPAIRED OR
RENEWED, DETAILED INVESTIGATION MUST BE MADE ON COMPLETION TO ENSURE
THAT DISTORTION, TOOLS, RAGS OR ANY OTHER LOOSE ARTICLES OR FOREIGN
MATTER SUCH AS COULD IMPEDE THE FREE MOVEMENT AND SAFE OPERATION OF
THE SYSTEM ARE NOT PRESENT AND THAT THE SYSTEMS AND INSTALLATIONS IN
THE WORK AREA ARE CLEAN.
WHENEVER ANY PART OF EITHER THE MAIN OR ANY OTHER ASSOCIATED SYSTEM
IS DISMANTLED, ADJUSTED, REPAIRED OR RENEWED, THAT PART OF THE SYSTEM
THAT HAS BEEN DISTURBED SHALL BE SUBJECTED TO A DUPLICATE INSPECTION
FOR SECURITY OF LOCKING DEVICES, FULL AND FREE MOVEMENT, DIRECTION AND
TENSION CHECKS AND, FOR AIRCRAFT ON THE BRITISH REGISTER, THE
COMPLETION OF THIS WORK SHALL BE CERTIFIED IN ACCORDANCE WITH THE
BRITISH CIVIL AIRWORTHINESS REQUIREMENTS, SECTION A, CHAPTER A6-2 OR IN
THE CASE OF AIRCRAFT NOT ON THE BRITISH REGISTER, THE EQUIVALENT
NATIONAL STANDARD.
WARNING: MAKE SURE THE AIRCRAFT AND THE AIRCRAFT SYSTEMS ARE MADE
SAFE AS DETAILED IN THE APPLICABLE CHAPTERS OF THE AIRCRAFT
MAINTENANCE MANUAL.
NOTE:  Abbreviations used in the accomplishment instructions of this service bulletin
are:
AMM - Aircraft Maintenance Manual.
A.  Evaluation
If the actual service life of the main undercarriage fitting is unknown, the aircraft
records should be investigated to determine if the component has been replaced
in-service. If there is no evidence contained in the aircraft records to indicate that
the fitting has been replaced, operators are to assume that the component has
accumulated the same number of landings as the airframe.
Where the main undercarriage fitting has been replaced in-service with a new
component, operators are to assume that the fitting has accumulated the same
number of landings as the airframe since the replacement was installed.
For instances where the main undercarriage fitting has been replaced in-service
with a used component and the history of the component is known, operators are
to assume that the fitting has accumulated a total number of landings equal to the
same number of landings as the airframe since the replacement component was
installed plus the number of landings accumulated by the fitting prior to installation
on the aircraft. If there is any uncertainty over the integrity of the history of the part
then the fitting should be assumed to have reached the inspection threshold and
therefore should be inspected by NDT.
ORIGINAL ISSUE 29/04/09  32-JA090240
PAGE 5
BAE SYSTEMS (Operations) Limited.
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BRITISH AEROSPACE
JETSTREAM
SERIES 2100 & 3200
SERVICE BULLETIN
For instances where the main undercarriage fitting has been replaced in-service
with a used component, and the history of the component is unknown, operators
are to assume that the fitting has reached the inspection threshold and therefore
should be inspected by NDT.
B.  Equipment
(1)  The following equipment was used during the development of this inspection and
found to be acceptable:
Instrument: Elotest B1 v4 phase analysis eddy current instrument with B1-
RS connector from Rohmann (UK) Ltd.
(b) Rotor:  Mini rotor from Rohmann (UK) Ltd.
(c)  Probe 1:  3/8 in. diameter probe to fit the mini rotor
part no. MRRP-RUK-1-0.375 in (9.53 mm) - 2 in. (50.8 mm)
from Rohmann (UK) Ltd.
Probe 2:  ½ in. diameter probe to fit the mini rotor
part no. MRRP-RUK-1-0.5 in. (12.7 mm) - 2 in. (50.8 mm).
from Rohmann (UK) Ltd.
Probe 3:  7/8 in. diameter probe to fir the mini rotor
part no. MRRP-RUK-1-0.875 in. (22.23 mm) - 2 in. (50.8 mm).
from Rohmann (UK) Ltd.
(d) Lead:  RK-2-N/1 from Rohmann (UK) Ltd.
(e) Calibration Standard: Aluminium alloy calibration block for rotating
(dynamic) eddy currents, cross drilled hole type
(refer to NTM Part 6, 20-00-00).
NOTE:  Any comparable eddy current equipment may be used provided it
satisfies the requirements of this instruction, and is capable of resolving
the reference hole in the calibration standard at the required level of
sensitivity.
ORIGINAL ISSUE: 29/04/09  32-JA090240
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BAE SYSTEMS (Operations) Limited.
Printed in the U.K.

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SHILON AEROSPEC
JETSTREAM
SERIES 3100 & 7200
SERVICE BULLETIN
C. Preparation.
(1) Instrument calibration:
Initial Settings:  Refer to manufacturers instructions.
Alarm:  Off
Frequency:  Set to 500 kHz
Gain:  Set to produce required sensitivity
Pre-amp:  30 dB
Y spread:  0 dB
X spread:  0 dB
Filter:  Band:  Set to Dynamic
High pass:  Set to 500Hz
Low pass:  Set to 2.5kHz
Bandwidth Limiter:  Set to Off
Dot Position:  Reference figure 2
(2)  Sensitivity settings:
(a)  Select spot display (YIX).
(b)  Using the appropriate probe, adjust the instrument to produce a vertical
signal from the 1/16 in. (1.58 mm) diameter cross drilled hole in the
calibration standard.
(c) Select time base display (Y/T).
(d) Set signal from 1/16 in. (1.58 mm) diameter hole to 100 per cent full screen
height (FSH).
(e)  Select spot display (Y-X).
Set the signal from the 1/16 in. (1.58 mm) diameter hole to 30 degrees
anticlockwise.
(3) Make aircraft safe for servicing:
(a) Refer to AMM 07-10-00, raise aircraft on jacks.
(p) Refer to AMM 32-10-11, remove main undercarriage leg.
ORIGINAL ISSUE: 29/04/09  32-JA090240
PAGE 7
BAE SYSTEMS (Operations) Limited.
Printed in the U.K.

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IRITISH AEROSPAC  JETSTREAM
SERIES 7100 & 3200
SERVICE BULLETIN
D.  Accomplishment
Make certain the main undercarriage leg pivot beam fastener bores are clean and
free from burrs:
(a)  Refer to Figure 1 and visually check the inspection areas for any obvious
damage prior to inspection.
(2)  Inspection procedure:
(a)  Select spot (Y/X) display.
Insert the probe into the first bore to be inspected and scan the full length of
the bore.
(c) By careful manipulation, maximise and observe any signals.
(d)  Make sure that the sensitivity is reset for each different probe used, and that
operations (a) to (b) are repeated for each fastener bore to be inspected.
NOTE:  A large signal indicating the presence of mechanical damage is produced
in each 7/8 in. (22.23 mm) diameter bore at the point where it is
intersected by another 7/16 in. (11.11 mm) diameter fastener bore (Ref.
Figure 1). This mechanical signal is caused by the intersecting fastener
bore and should not be reported.
(3)  Interpretation:
(a)  Interpret signais by reference to Figure 3.
(b)  Select time base (Y/T) display to ascertain the amplitude and direction of
any signal.
(4) Accept / Reject criteria:
(a) Vertical signals over 20 per cent FSH that can not be attributed to probe
handling or material interfaces shall be considered as a crack.
Signals greater than 40 per cent FSH, irrespective of signal angle, that can
not be attributed to probe handling or material interfaces shall be
investigated and reported.
NOTE 1: When reporting a crack or discontinuity, select time base (YIT) display
to ascertain its amplitude and direction.
NOTE 2:  The word discontinuity is a generic term for faults such as cracks,
corrosion and mechanical damage.
ORIGINAL ISSUE: 29/04/09  32-JA090240
PAGE 8
BAE SYSTEMS (Operations) Limited.
Printed in the U.K.

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RITISH AEROSPAC
JETSTREAM
SERIES 3100 & 7200
SERVICE BULLETIN
E. Recovery
(1) Repair:
(a) Repair any cracks or discontinuities found in accordance with the SRM or
contact BAE SYSTEMS Repair Design Office for an approved repair
scheme. Make aircraft safe for servicing.
(2) Reinstall:
(a) Refer to AMM 32-10-11, replace main undercarriage leg.
(b) Refer to AMM 07-10-00, lower and remove jacks.
(3) Aircraft records:
(a) Add service bulletin number 32-JA090240 to the aircraft records.
(b) All crack and discontinuity indications are to be recorded in the relevant
aircraft documentation, and the appropriate BAE SYSTEMS approved
repair/rectification taken.
(4) Reporting procedure:
(a)  Report all cracks discontinuities to:
Fleet Data Department (Building 37)
BAE SYSTEMS
Regional Aircraft
Prestwick International Airport
Ayrshire
Scotland KA9 2RW
(b) Also send the following information:
1 Aircraft construction number.
2 Aircraft registration.
Flying hours and number of landings.
4  SB number.
5  Location and area or length of crack or discontinuity per cent FSH.
NOTE:  Operators are reminded of the necessity to inform The Project
Manager, Airline Maintenance & Publication Services, BAE
SYSTEMS, Prestwick, of the accomplishment of this service bulletin in
order to obtain the necessary revisions for the affected manuals, see
paragraph 1.K. Publications Affected, of this bulletin.
ORIGINAL ISSUE: 29/04/09  32-JA090240
PAGE 9
BAE SYSTEMS (Operations) Limited.
Printed in the U.K.

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BRITISH AEROSPACE  JETSTREAM
SERIES 3100 & 7200
SERVICE BULLETIN
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ORIGINAL ISSUE: 29/04/09  32-JA090240
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BRITISH AEROSPACE
JETSTREAM
SERIES 3100 & 3200
SERVICE BULLETIN
MAIN
UNDERCARRIAGE
FITTING
(REF)
MAIN LANDING
GEAR LEG
(REF)
FWD
INSPECT
0.875in (22.23mm) DIA
BORE
0.437in (11.11mm) DIA
BORE INTERSECTS
BORE TO BE INSPECTED.
SIGNALS CAUSED BY
THIS BORE  LEFT SHOWN
SHOULD NOT  RIGHT SIMILAR
BE REPORTED  (DETAIL REMOVED
FOR CLARITY)
INSPECT
0.375in (9.53mm) DIA  INSPECT
BORE  INSPECT  0.375in (9.53mm) DIA
0.5in (12.7mm) DIA  BORE
BORE
NOTE:
IT IS REQUIRED THAT THE MAIN
UNDERCARRIAGE LEG IS REMOVED
WHEN CARRYING OUT THIS INSPECTION
VIEW LOOKING  VIEW LOOKING
FORWARD  AFT
J3200004
Area of Inspection - Main Landing Gear Pivot Beam
Figure 1
ORIGINAL ISSUE: 29/04/09  32-JA090240
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BRITISH
JETSTREAM
SERIES 3100 & 3200
SERVICE BULLETIN
100% FSH
75% FSH
50% FSH
25% FSH
TYPICAL ELOTEST B1 v4 SCREEN DISPLAY FOR
0.0625in (1.58mm) HOLE IN CALIBRATION STANDARD
Y/T DISPLAY
100% FULL SCREEN HEIGHT
100% FSH
75% FSH
50% FSH
25% FSH
TYPICAL ELOTEST B1 v4 SCREEN DISPLAY FOR
0.0625in (1.58mm) HOLE IN CALIBRATION STANDARD
Y/X DISPLAY
30 DEGREES ANTI-CLOCKWISE
100% FSH
75% FSH
50% FSH
25% FSH
TYPICAL ELOTEST B1 v4 SCREEN DISPLAY
FOR TIGHT FATIGUE CRACK
Y/X DISPLAY
J3200005
Instrument Calibration - Screen Display
Figure 2
ORIGINAL ISSUE: 29/04/09  32-JA090240
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BRITISH AEROSPACE
JETSTREAM
SERIES 3100 & 3200
SERVICE BULLETIN
MECHANICAL DAMAGE IN A FASTENER BORE
AND SIGNALS FROM THE 0,0625in (1.58mm) DIA CROSS-DRILLED HOLE
WILL APPEAR AT APPROXIMATELY 30 DEG ANTI-CLOCKWISE
CRACK SIGNALS FROM
FASTENER BORES
APPEAR VERTICAL
LARGE OPEN CRACKS MAY GIVE SIGNAL ANGLES OUTSIDE THOSE SHOWN  NOTE:
J3200008
Spot Display (Y/X) Showing Signal Angles
Figure 3
ORIGINAL ISSUE: 29/04/09  32-JA090240
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IRITISH AEROSPAC
JETSTREAM
SERIES 7100 & 3200
SERVICE BULLETIN
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ORIGINAL ISSUE: 29/04/09  32-JA090240
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BRITISH AEROSPAC
JETSTREAM
SERIES 3100 & 3200
SERVICE BULLETIN
3. MATERIAL INFORMATION
(1) None.
ORIGINAL ISSUE: 29/04/09  32-JA090240
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IRITISH AEROSPAC  JETSTREAM
SERİES 3100 & 3200
SERVICE BULLETIN
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ORIGINAL ISSUE 29/04/09  32-JA090240
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SRITISH AEROSPAC
JETSTREAM
SERIES 3100 & 3200
SERVICE BULLETIN
4.  CONTINUED AIRWORTHINESS
A.  Continued Airworthiness Instructions
(1) There are no continued airworthiness instructions with this service bulletin.
B.  Scheduled Maintenance
(1) None.
c.  Removal Procedures
(1) None.
D.  Installation Procedures
(1) None.
E.  Test Procedures
(1) None.
F.  Trouble Shooting
(1) None.
ORIGINAL ISSUE 29/04/09  32-JA090240
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BRITISH AEROSPAC
JETSTREAM
SERIES 3100 & 3200
SERVICE BULLETIN
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ORIGINAL ISSUE 29/04/09  32-JA090240
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BAE SYSTEMS
ACCOMPLISHMENT REPORT
SERVICE BULLETIN NUMBER  32-JA090240
TITLE: WINGS - INSPECTION OF MAIN UNDERCARRIAGE FITTING.
TO: THE PROJECT MANAGER,
AIRLINE MAINTENANCE & PUBLICATION SERVICES,
BAE SYSTEMS,
PRESTWICK INTERNATIONAL AIRPORT,
AYRSHIRE, KA9 2RW,
SCOTLAND.
Telephone:  (01292) 675207
Fax:  (01292) 675704
E-mail:  RAPublications@baesystems.com
PLEASE BE ADVISED THAT THE ABOVE SERVICE BULLETIN HAS BEEN EMBODIED ON
AIRCRAFT CONSTRUCTORS NUMBER(S):
WE REQUEST THE APPROPRIATE REVISIONS TO APPLICABLE MANUALS.
NAME:
SIGNED:
COMPANY: .........
DATE:..................
SERVICE BULLETIN COMMENTS/FEEDBACK
Please report any non-technical comments or inaccuracies regarding this service bulletin to the
above address.
BAE SYSTEMS (Operations) Limited.
Printed in the U.K.

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BRITISH AEROSPACE
JETSTREAM
SERIES 3100 & 3200
SERVICE BULLETIN
SERVICE BULLETIN
BAE SYSTEMS,
PRESTWICK INTERNATIONAL AIRPORT,
AYRSHIRE, KA9 2RW,
SCOTLAND.
32-JA090240
TRANSMITTAL SHEET
This page transmits the original issue of Service Bulletin 32-JA090240, pages 1 thru 18.
TITLE: WINGS - INSPECTION OF MAIN UNDERCARRIAGE FITTING.
INSTRUCTIONS FOR INCORPORATION
Add pages 1 thru 18.
ORIGINAL ISSUE: 29/04/09  32-JA090240
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SERIES 3100 & 3200
SERVICE BULLETIN
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