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BAe JETSTREAM Series 4100
SERVICE BULLETIN
BAE SYSTEMS,
PRESTWICK INTERNATIONAL AIRPORT, AYRSHIRE, KA9 2RW, SCOTLAND.
J41-52-064
TRANSMITTAL SHEET This page transmits Original Issue to Inspection Service Bulletin J41-52-064, pages 1 through 15.
TITLE: DOORS - INTRODUCTION OF ULTRASONIC INSPECTION OF THE UPPER AND
LOWER PASSENGER/CREW DOOR PIN GUIDES
INSPECTION AMENDMENT NUMBER JA090540 ORIGINAL ISSUE: SEP 15/09 J41-52-064 PAGE 1 OF 1 BAE SYSTEMS (Operations) Limited Printed in the U.K
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BAe JETSTREAM Series 4100
SERVICE BULLETIN
BAE SYSTEMS,
PRESTWICK INTERNATIONAL AIRPORT, AYRSHIRE, KA9 2RW, SCOTLAND.
J41-52-064 TITLE: DOORS - INTRODUCTION OF ULTRASONIC INSPECTION OF THE UPPER AND
LOWER PASSENGER/CREW DOOR PIN GUIDES
INSPECTION AMENDMENT NUMBER JA090540
1. PLANNING INFORMATION A. Effectivity All Jetstream series 4100 aircraft.
B. Reason Failure of a passenger/crew entry door lower aft pin guide plate has been identified on an in-service aircraft as a result of exfoliation corrosion.
C. Description This inspection service bulletin introduces an Ultrasonic NDT inspection which has been developed to allow corrosion and discontinuities to be identified on both the upper and lower pin guide plates in situ with some guide blocks removed.
The tasks are as follows:
- The passenger doors are opened.
- An ultrasonic inspection of the passenger door upper and lower guide plates is done.
- The passenger doors are closed.
- The aircraft records are amended.
ORIGINAL ISSUE: SEP 15/09 J41-52-064 PAGE 1 OF 15 BAE SYSTEMS (Operations) Limited.
Printed in the U.K
BAE JETSTREAM Series 4100
SERVICE BULLETIN D. Manpower
2.0 man-hours for NTD inspection.
NDT specialist.
Mechanical and electrical skilis are necessary.
E. Material - Cost and availability Not applicable.
F. Tooling - Price and Availability Not applicable.
G. Weight and Balance Not affected.
H. Aircraft Noise Not affected.
Electrical Load Data Not affected.
Software Accomplishment Summary None.
K. References
- Aircraft maintenance manual Chapter 12-00-00.
Publications Affected None.
M. Family Tree Of Modification Relationships Not applicable.
J41-52-064 ORIGINAL ISSUE: SEP 15/09 PAGE 2 Printed in the U.K.
BAe JETSTREAM Series 4100
SERVICE BULLETIN N. Approval The technical content of this inspection service bulletin is the subject of Airworthiness Directive consultation, and is approved under the authority of Design Organisation Approval No. EASA.21J.047.
This inspection is to be embodied within 12 months of the original issue date of the inspection service bulletin. Repeat inspections to be done at 4 year intervals after the original inspection.
Signed Date ... 15/9/9 EASA Part 21 Approval No. EASA.21J.047.
ORIGINAL ISSUE: SEP 15/09 J41-52-064 PAGE 3 Printed in the U.K.
BAe JETSTREAM Series 4100
SERVICE BULLETIN
BLANK PAGE J41-52-064 ORIGINAL ISSUE: SEP 15/09 PAGE 4 Printed in the U.K.
BAe JETSTREAM Series 4100
SERVICE BULLETIN
2. ACCOMPLISHMENT INSTRUCTIONS WARNING: MAKE SURE THE AIRCRAFT AND THE AIRCRAFT SYSTEMS ARE MADE
SAFE AS DETAILED IN THE APPLICABLE CHAPTERS OF THE AIRCRAFT MAINTENANCE MANUAL.
NOTE: Statements 'AMM' refer to the Jetstream Series 4100 Aircraft Maintenance Manual.
A. Preparation
(1) Open the passenger doors.
(2) Refer to AMM, Chapter 12-00-00. Remove all aircraft electrical power.
(3) Display a warning notice in the flight compartment 'DO NOT APPLY POWER TO THE AIRCRAFT.
B. Accomplishment
(1) Refer to Appendix 1. Do an ultrasonic inspection of the passenger door upper and lower guide plates.
(2) If the component being inspected fails the ULTRASOUND inspection. The component is to be replaced with a serviceable component before next flight.
C. Aircraft Recovery
(1) Remove warning notice from the flight compartment.
(2) Close the aircraft passenger doors.
(3) Aircraft records.
Add Inspection Service Bulletin number J41-52-064' to the aircraft records.
Operators are requested to advise The Publications Control Team, Aircraft Maintenance and 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.
3. MATERIAL INFORMATION Not applicable.
ORIGINAL ISSUE: SEP 15/09 J41-52-064 PAGE 5 Printed in the U.K.
BAe JET STREAM Series 4100
SERVICE BULLETIN
BLANK PAGE J41-52-064 ORIGINAL ISSUE: SEP 15/09 PAGE 6 Printed in the U.K.
BAe JETSTREAM Series 4100
SERVICE BULLETIN
4. CONTINUED AIRWORTHINESS A. Continued Airworthiness Instructions There are no continued airworthiness instructions applicable to this service bulletin.
B. Scheduled Maintenance None.
C. Removal Procedures None.
D. Installation Procedures None.
E. Test Procedures None.
F. Trouble Shooting None.
ORIGINAL ISSUE: SEP 15/09 J41-52-064 PAGE 7 Printed in the U.K.
BAC JETSTREAM Series 4100
SERVICE BULLETIN
BLANK PAGE J41-52-064 ORIGINAL ISSUE: SEP 15/09 PAGE 8 Printed in the U.K.
BAe JETSTREAM Series 4100
SERVICE BULLETIN APPENDIX 1
PASSENGER DOOR - UPPER AND LOWER GUIDE PLATES SSI NUMBER: None
1. INSTRUCTION REFERENCE BAE/MAN/J41/ULT/3
2. SAFETY PRECAUTIONS All relevant local safety procedures must be observed.
3. PROCEDURE A. Application This instruction is applicable to Jetstream series 4100.
B. Component to be Examined (Ref. Fig. 1)
(1) Passenger door, upper and lower, guide plates fitted to the forward and aft door frames.
C. Purpose of Examination
(1) To detect a split in a component, caused by exfoliation corrosion, flush with he upper surtace of its base It is anticipated that a split is detected when its area is approximately 0.12 in.2 (78mm?) or greater.
D. Equipment Required The following equipment was used during the development of this inspection instruction and found to be acceptable.
(1) Instrument: Epoch Lt from Olympus NDT Ltd.
(2) Probe: Krautkramer 5MHz frequency, 10mm diameter, 0 degree contact probe Part number K5K from GE Inspection Technologies (Ref. Fig. 3).
(3) Lead: Standard lemo to microdot connectors Part number LCM-74-4 from Olympus NDT Ltd
(4) Coupling Media: Ultragel Il from Diagnostic Sonar Ltd.
NOTE: Any comparable ultrasonic equipment may be used provided it satisfies the requirements of this instruction.
ORIGINAL ISSUE: SEP 15/09 J41-52-064 PAGE 9 Printed in the U.K.
BAe JETSTREAM Series 4100
SERVICE BULLETIN E. Preparation Refer to the Aircraft Maintenance Manual (AMM) for preparation of the following items:
(1) Aircraft
(a) Remove the stainless steel guides as shown in figure 1 from the upper and lower guide plates on both the forward and aft door frames.
(2) Component
(a) Ensure that the surface of the scan area is clean and smooth.
(b) Visually check the area of inspection for any obvious damage prior to inspection.
Examination Procedure
(1) Instrument Calibration Table 1 Initial settings Refer to manufacturer's instructions Gain As required dB Range 1.000 in.
Velocity 0.2517 in/uS (6394 m/s) Zero 0 pS Pulser Half Wave + Energy Med Damping 50 0 Transmission Pulse Echo Reject 0% Angle O degrees Gates Position as shown in figure 2 Set gate 1 to trigger the alarm above gate threshold Alarm Set gate 2 to trigger the alarm below gate threshoid
(2) Sensitivity Settings
- (a) Position the initial pulse at zero-on the timebase. -
(b) Place the probe on the component as shown in figure 2, and set the backwall echo to 8 on the timebase.
(c) Adjust the instrument's gain so the amplitude of the backwall echo is 100 per cent full screen height.
(a) Re-check the sensitivity setting on each door guide prior to inspection.
041-52-064 ORIGINAL ISSUE: SEP 15/09 PAGE 10 Printed in the U.K.