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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.53-239 DATE: 13-JUN-2012 TITLE: FUSELAGE - INSPECTION OF REAR FUSELAGE AFT SKIN LAP JOINTS FOR CRACKING.
REVISION: 5 DATE: 02-MAR-2017
ACTIONS
(1) Remove and discard Inspection Service Bulletin (ISB) complete at revision 4.
(2) Insert Inspection Service Bulletin complete at revision 5.
REASONS FOR REVISION
(1) Compliance revised for inspection of stringer 11 with no repairs (see Table 1).
(2) Compliance revised for inspection of stringer 11 with repairs (see Table 1).
(3) Compliance revised for aircraft that have had stringer 11 inspected i.a.w revision 4 of this ISB (see para.1.D).
(4) View D arrows deleted (see Drawing 1 and Drawing 2).
(5) View of typical repairs added and text for reduced inspection intervals lap joints amended (see Drawing 3).
(6) Editorial (not highlighted).
INCORPORATION OF THIS REVISION DOES NOT REQUIRE INSPECTIONS
ADDITIONAL TO THOSE DONE AT PREVIOUS REVISIONS OF THIS INSPECTION SERVICE BULLETIN.
Date: 13-JUN-2012 REVISION TRANSMITTAL SHEET ISB.53-239 Revision: 5 02-MAR-2017 Page 1 of 2 Printed in England
BAE SYSTEMS
INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
TRANSMITTAL FOR INSPECTION SERVICE BULLETIN REVISION SERVICE BULLETIN No.ISB.53-239 This Page Is Intentionally Left Blank.
Date: 13-JUN-2012 REVISION TRANSMITTAL SHEET ISB.53-239 Revision: 5 02-MAR-2017 Page 2 of 2 Printed in England
BAE SYSTEMS (Operations) Limited, Prestwick International Airport, Ayrshire, KA9 2RW, Scotland.
INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT TITLE: FUSELAGE - INSPECTION OF REAR FUSELAGE AFT SKIN LAP JOINTS FOR CRACKING.
1.Planning information A.Effectivity
(1) Aircraft Aircraft affected by this inspection are defined below:- BAe 146-301 ALL BAe 146-100, 200, 300 Series ALL AVRO 146-RJ70, RJ85, RJ100 Series Check the aircraft technical records for accomplishment of this inspection before actioning this Inspection Service Bulletin (ISB).
B. Reason During climb-out, an AVRO 146-RJ100 recently experienced pressurization problems. Subsequent investigation identified a
42.87 in. (1089 mm.) long crack in the rear fuselage aft lower skin at the lap joint at stringer 30 left. In addition to the skin crack, cracks were found in Frames 41X and 42.
Existing fatigue inspections of the fuselage skin may not detect a crack growing in this area, which could affect the structural integrity of the rear fuselage.
Consequently, fleet wide inspection of the rear fuselage skin lap joints is required.
C.Description An external eddy current inspection is performed on the rear fuselage aft skin lap joints at stringers 11, 18 and 30 left and right and stringer 2 right, between frame 39Y and frame 44.
Inspection aft of frame 44 is not required.
NOTE: There may be external skin repair plates fitted to the aircraft which obscure the areas subject to inspection or impede the inspection process. These areas must be inspected in accordance with (i.a.w.) Appendix 3 of this ISB.
Date: 13-JUN-2012 ISB.53-239 Revision: 5 02-MAR-2017 Page 1 of 16 Printed in England
BAE SYSTEMS
INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT NOTE: For BAe 146-100, BAe 146-200 and BAe 146-300 aircraft with Large freight doors, lap joints 11 and 18 left forward of frame 43, and lap joint 2 right forward of frame 42, are by the large freight door surround skin doublers.
These areas are not to be inspected (see Drawing 2, main ISB) .
If cracks, corrosion or any other defects are found, contact BAE SYSTEMS for an approved repair scheme.
D.Compliance This ISB, at Revision 2 or later, is the subject of EASA Airworthiness Directive 2013-0207. This Airworthiness Directive may be subject to revision or supersedure with the publication of this ISB, at Revision 5. Compliance with this ISB, at Revision 5, is to be i.a.w. the compliance requirements below:- Table 1.
Skin Land Initial Repair Repeat Repeat Inspection Inspection, Embodied? Interval Interval 146 Method ALL RJ Delta and RJ Pre Aircraft P (Mods Delta P HCM50070E (Pre-Mods or 50070F HCM50070E and or 50070F and HCM50259A) HCM50259A) Stringer 2, right 10,000 FC No 4000 FC 7500 FC Appendix 3 Stringer 2, right See Note 2 Yes 4000 FC 7500 FC Appendix 3 See Note 3 Stringer 11 left and 10,000 FC No 4000 FC 7500 FC Appendix 3 right (except as shown in Views A and B in Drawing 3 of the main ISB) Stringer 11 left and See Note 2 Yes 4000 FC 7500 FC Appendix 3 right (except as shown in See Note Views A and B in Drawing 3 3 of the main ISB) Stringer 11 left and 10,000 FC No 4000 FC 7500 FC right, as shown in Views A and B in Drawing 3 of the main ISB Date: 13-JUN-2012 ISB.53-239 Revision: 5 02-MAR-2017 Page 2 of 16 Printed in England
BAE SYSTEMS
INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT Skin Land Initial Repair Repeat Repeat Inspection Inspection, Embodied? Interval Interval 146 Method ALL RJ Delta and RJ Pre Aircraft P (Mods Delta P HCM50070E (Pre-Mods or 50070F HCM50070E and or 50070F and HCM50259A> HCM50259A) Stringer 11 left and See Note 2 Yes 2400 FC 4300 FC Appendix 3 right, as shown in Views See Note A and B in Drawing 3 of 3 the main ISB Stringer 18, left and 10,000 FC No 4000 FC 7500 FC Appendix 3 right Stringer 18, left and See Note 2 Yes 4000 FC 7500 FC Appendix 3 right See Note 3 Stringer 30 left and 10,000 FC No 4000 FC 7500 FC Appendix 3 right (except as shown in Views A and B in Drawing 3 of the main ISB) Stringer 30 left and See Note 2 Yes 4000 FC 7500 FC Appendix 3 right (except as shown in See Note Views A and B in Drawing 3 of the main ISB) Stringer 30 left and 10,000 FC No 4000 FC 7500 FC Appendix 2 right, as shown in Views A and B in Drawing 3 of the main ISB Stringer 30 left and See Note 2 Yes 2400 FC 4300 FC Appendix 3 right, as shown in Views See Note A and B in Drawing 3 of 3 the main ISB NOTE: (1) FC is defined as Flight Cycles.
NOTE: (2) Aircraft that have been inspected i.a.w. this ISB, at Revision 3 or earlier, with external skin repair plates which prevented inspection, do not require any retrospective inspection. Those areas will be inspected i.a.w. Table 1, above, at the next scheduled repeat inspection.
NOTE: (3) If the repair extends across the lap joint, i.e. it does not abut it, then no inspection is required, see Note 1 and View A of Drawing 3 in main ISB.
For aircraft that have inspected stringer 11 as shown in Views A and B in Drawing 3, with no repair, i.a.w. Revision 4 of this ISB, Date: 13-JUN-2012 ISB.53-239 Revision: 5 02-MAR-2017 Page 3 of 16 Printed in England
BAE SYSTEMS
INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT using the Appendix 3 inspection method, next inspection will be at 2400 FC for RJ Delta P aircraft, and 4300 FC for all other aircraft, using the Appendix 2 inspection method. Thereafter the repeat will be as per Table 1.
For aircraft that have accumulated more than 9000 FC since entry into service, initial inspection is to be within 1000 FC or 6 months, whichever is earlier.
Inspections previously performed i.a.w. this ISB at initial issue or EASA AMOC 10041592 may be claimed, but only as the initial inspections for the skin lands at stringer 30 left and stringer 30 right.
Thereafter, all stringers are to be inspected at the repeat intervals specified in Table 1.
E. Approval The technical content of this document is approved under the authority of DOA Ref.EASA.21J.047.
F.Manpower To inspect as defined in para. 2. - 3.0 man-hours per aircraft.
This man-hour estimate does not include time for gaining access to the inspection area.
G. Materials - cost and availability Not applicable.
H.Tooling - cost and availability Appropriate staging/access platforms are required to allow close inspection of all the rear fuselage aft skin lap joints.
Refer to Appendix 2, EQUIPMENT AND MATERIALS.
Refer to Appendix 3, EQUIPMENT AND MATERIALS.
I.Weight and balance Not applicable.
J. References Aircraft Maintenance Manual AMM 12-10-24.
Date: 13-JUN-2012 ISB.53-239 Revision: 5 02-MAR-2017 Page 4 of 16 Printed in England
BAE SYSTEMS
INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT K.Publications affected Not applicable.
L.Electrical load data Not applicable.
M.Software accomplishment summary Not applicable.
N.Aircraft noise levels Not applicable.
Date: 13-JUN-2012 ISB.53-239 Revision: 5 02-MAR-2017 Page 5 of 16 Printed in England
BAE SYSTEMS
INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT This Page Is Intentionally Left Blank.
ate: 13-JUN-201 evision: 5 U2-YAR-2U1 SB. 53-23 ade 6 0t1 Printed in England
BAE SYSTEMS
INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT
2.Accomplishment instructions A. General
(1) The following abbreviations are used within this document:- AMM - Aircraft Maintenance Manual
i.a.w. - in accordance with.
(2) Observe all WARNINGS and CAUTIONS appearing in the AMM referred to in this ISB.
B. Preparation
(1) Refer to AMM 12-10-24 and remove all aircraft electrical power.
(2) Arrange appropriate staging/access platforms to allow safe inspection of all the rear fuselage aft skin lap joints.
(3) Remove dorsal panels 273CT, 275AT, 275BR and 275CR to reveal lap joint at stringer 2 right.
C. Inspection
(1) Refer to Drawing 1 or Drawing 2 in main ISB, as appropriate.
Perform an external eddy current inspection on the rear fuselage aft skin lap joints at stringer 11, 18 and 30 left and right and stringer 2 right, between frame 39Y and frame 44 using the appropriate inspection Method as defined in NOTE: Inspection aft of frame 44 is not required.
NOTE: Refer to Drawing 2 in main ISB, for BAe 146-10U, BAe 146-200 and BAe 146-300 aircraft with large freight doors, stringers 11 and 18 left forward of frame 43, and lap joint 2 right forward of frame 42, are obscured by the large freight door surround skin doublers.
If cracks, corrosion or any other defects are found, contact BAE SYSTEMS for an appropriate repair scheme.
D. Test Not applicable.
Date: 13-JUN-2012 ISB.53-239 Revision: 5 02-MAR-2017 Page 7 of 16 Printed in England
BAE SYSTEMS
INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT E. Close up
(1) Make certain work area is clean, and clear of tools and miscellaneous equipment.
(2) Install dorsal panels previously removed for access.
(3) Remove staging/access platforms previously arranged for access.
F. Documentation
(1) Complete a copy of the Inspection Report (Appendix 1) attached to this ISB and return by fax or mail.
OR Return all required Inspection Report details via e-mail.
G.Terminating action
(1) None.
Date: 13-JUN-2012 ISB.53-239 Revision: 5 02-MAR-2017 Page 8 of 16 Printed in England
BAE SYSTEMS
INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT FRAME 43 FRAME 44 FRAME 39Y FRAME 20100000000 43
FRAME FRAME 44 39Y STR 2- STR 11 RH FRAME FRAME 43 FRAME STR 18 RH 39Y 44 STR 30 RH
• STR 11 LH STR 18 LH
VIEW LOOKING INBOARD
RIGHT SIDE STR 30 LH
LAP JOINTS TO BE INSPECTED STR 2
VIEW LOOKING INBOARD
LEFT SIDE STR 11 RH. •STR 11 LH STR 18 RH T • STR 18 LH STR 30 RH * STR 30 LH C
VIEW LOOKING AFT N5323915
AREAS OF INSPECTION, LEFT AND RIGHT - PASSENGER AIRCRAFT DRAWING 1. (Revised) Date: 13-JUN-2012 ISB.53-239 Revision: 5 02-MAR-2017 Page 9 of 16 Printed in England
BAE SYSTEMS
INSPECTION SERVICE BULLETIN BAe 146 SERIES/AVRO 146-RJ SERIES AIRCRAFT FRAME 43 B FRAME 44 VA FRAME 39Y
FRAME FRAME FRAME 43 FRAME 39Y 44 42 STR 2 RH- STR 11 RH STR 18 RH STR 30 RH
FRAME FRAME 39Y 43 FRAME 44
VIEW LOOKING INBOARD
- STR 11 LH RIGHT SIDE STR 18 LH STR 2 RH
- STR 30 LH STR 11 RH. „STR 11 LH
VIEW LOOKING INBOARD
LEFT SIDE STR 18 RH - T ** STR 18 LH
• LAP JOINTS TO BE INSPECTED STR 30 RH * STR 30 LH
VIEW LOOKING AFT B5323916
AREAS OF INSPECTION, LEFT AND RIGHT - AIRCRAFT WITH LARGE FREIGHT DOOR DRAWING 2. (Revised) Date: 13-JUN-2012 ISB.53-239 Revision: 5 02-MAR-2017 Page 10 of 16 Printed in England