P.68 VARIANTS. SERVICE BULLETIN No. 221 Rev. 5

Transcription

1 vulcanair spa via g. pascoli, casoria (na) italia Tel Fax info@vulcanair.com P.68 VARIANTS Approved by the Vulcanair Design Organisation The technical content of this document is approved under the authority of DOA No. EASA.21J.009. Operator obligations with regards to inspections, modifications and/or other technical directives and their times of compliance are laid out in the relative Airworthiness Directives. SERVICE BULLETIN No. 221 Rev. 5 (Supersedes the previous issue dated 04 June 2015) Design Organisation Approval No. AS-SB/15/016 dated 09 October 2015 INFORMATION SUBJECT: INSTALLATION OF BUBBLE WINDOWS NOTE Revision 5 of this Service Bulletin has been issued to extend the modification herein to P.68 Observer 2 s/n 420. No additional works are required for aircraft that have already embodied the previous issue of this Service Bulletin. 1. GENERAL 1.1 AIRCRAFT AFFECTED - P.68B s/n 160 and P.68C s/n 229, 285, 290 and P.68C-TC s/n 239 and P.68 Observer 2 s/n 397, 420 and 465 Page 1 of 11

2 1. GENERAL (Cont.) 1.2 PURPOSE For aircraft equipped without bubble windows The purpose of this Service Bulletin is to inform that a bubble windows kit SB221 (which include bubble windows without porthole) or SB221/A (which include bubble windows with porthole) is available, as optional installation, to replace the exiting window panels installed in cabin entrance door and in emergency exit window, to facilitate surveillance and/or observation operations, as per customer option. For aircraft already equipped with bubble windows without porthole The purpose of this Service Bulletin is to inform that a bubble windows kit SB221/B (which include bubble windows with porthole) is available, as optional installation, to replace the existing bubble windows without porthole installed in the cabin entrance door and in emergency exit window. 1.3 DESCRIPTION For aircraft equipped without bubble windows The installation of Kit SB221 (which include bubble windows without porthole) or Kit SB221/A (which include bubble windows with porthole), as per customer option, has to be carried out in accordance with the latest applicable revision of the drawing R.0483 and the instructions in Part A and B of Paragraph 2 hereunder. Above Kits include also: - A suitable half ring adapter to be installed FWD each static port, in order to avoid turbulence air that causes an incorrect reading of static pressure. - A new longer cabin entrance door bump stop to be installed in replacement of the existing one installed on the LH engine nose cowling, in order to avoid interference between the bubble window and the propeller blades. For aircraft already equipped with bubble windows without porthole The installation of Kit SB221/B (which include bubble windows with porthole), has to be carried out in accordance with the latest applicable revision of the drawing R.0483 and the instructions in Part A of Paragraph 2 hereunder For all the aircraft No change in aircraft Operating Limitations, Emergency Procedures, Normal Procedure, Performance and Weight and Balance data when the aircraft embody the Kit SB221 or Kit SB221/A or Kit SB 221/B. Also no additional maintenance tasks are required; the scheduled Maintenance Program of the aircraft remains unchanged. Page 2 of 11

3 1. GENERAL (Cont.) 1.3 DESCRIPTION (Cont.) Use removal/installation procedure in paragraph 2 hereunder as reference for future maintenance practices and handling of the bubble windows. 1.4 COMPLIANCE At owner s discretion. 1.5 MANHOURS The time necessary for the application of this Service Bulletin including the time required to access the parts and return the aircraft to an airworthy condition is estimated as: - 8 man-hours for installation of Kit SB221 or Kit SB221/A. - 6 man-hours for installation of Kit SB221/B. 1.6 SPECIAL TOOLS No special tools are required. 1.7 VARIATION IN WEIGHT & BALANCE Negligible. 1.8 ELECTRICAL SYSTEM LOAD Not applicable 1.9 REFERENCE DOCUMENTS Applicable Maintenance Manual for aircraft variant; Applicable Parts Catalogue for aircraft variant; Modification Scheme R.0483 (latest applicable revision) PUBBLICATIONS AFFECTED Applicable Maintenance Manual for aircraft variant; Applicable Parts Catalogue for aircraft variant MODIFICATION TO BE CARRIED OUT BY Vulcanair Part 145 or other Certified Maintenance Facility. Page 3 of 11

4 2. INSTALLATION INSTRUCTIONS WARNING This work procedure calls for the use of substances and/or procedures that may be injurious to health if adequate precautions are not taken. This document refers only to technical suitability and in no way absolves the Operator from statutory and other legal obligation relating to health and safety at any stage of manufacture or use. Part A: Replacement of the existing windows in cabin entrance door and in emergency exit window with new bubble windows with or without porthole For all the aircraft: 1. Place the aircraft in a suitable working area for the operations to be carried out; 2. Remove the bolts, washers, nuts and bushings securing the cabin entrance door and remove this last one. Label and store in a reserved area the removed fasteners and bushings for their subsequent reinstallation; 3. Remove the emergency exit window, operating the release lever; The following steps are applicable for both cabin entrance door and emergency exit window modification. 4. On work bench, if present, remove the curtain and relevant track from the concerned window; 5. Remove the concerned upholstery panel to gain access to the retainers fixing the window. Only for the cabin entrance door, remove the internal door handle, to allow the removal of the upholstery panel; 6. Label and store in a reserved area the removed curtain, the relevant track, the upholstery panel, cabin door handle and all the attaching screws, for their subsequent reinstallation; 7. Remove all the sealant around the frame contour on the external face of the window and trace on this last one the skin frame contour, to be used as reference for proper trimming of the new bubble windows as per the relevant step hereunder; 8. Drill out the blind rivets or remove the screws, as applicable, securing the retainers around the window. Remove the retainers; 9. Remove the window being careful to avoid damaging the concerned structure of the cabin entrance door and of the emergency exit window; 10. Remove the old sealant completely from the concerned structure. Clean all the concerned areas with Methyl-Ethyl-Ketone or equivalent cleaning solvent and where necessary, touch up them with Alodine 1200 (MIL-C-5541) and then with Epoxy Primer (MIL- PRF ). Label and store in a reserved area the retainers for their subsequent reinstallation; Page 4 of 11

5 2. INSTALLATION INSTRUCTIONS (Cont.) Part A (Cont.) 11. Using the old window as contour templates, trim, as required, the new bubble window P/N or P/N , as applicable (for emergency exit window) and P/N or P/N , as applicable (for cabin entrance door). For proper window trimming, position each old window with its outer face in contact with the inner face of the relevant new bubble window, centring the bubble portion of this last one respect to the frame marking previously carried out on the old window. Note Acrylic windows are tough BUT THEY ARE NOT UNBREAKABLE use care in handling and working. Before installing the bubble window, carefully smooth the edges to remove notches. Acrylics are notch sensitive. 12. Position the new bubble window in place on the relevant structure and lock it temporarily in place, then from the outer side, trace the relevant skin frame contour on it; Note The skin on the cabin entrance door and on the emergency exit window may be trimmed slightly if they interfere with the bubble portion of the new windows. 13. Remove the bubble window and referring to frame contour previously traced on it, remove the protective film around the coupling area from its both sides, and further 3 mm around the traced frame contour only on its outer side, to allow the subsequent sealing procedure; 14. Referring to drawing R.0483, position and install the sealant tape P/N NV inside the window retainers and inside the skin around the window frame contour, leaving about 3mm free area inside the skin around the windows frame contour to allow the proper sealing; 15. Referring to drawing R.0483, position and install the new bubble window P/N or P/N , as applicable (for emergency exit window) and P/N or P/N , as applicable (for cabin entrance door windows), using the previously removed retainers. Only for aircraft previously equipped without bubble windows: 16. Reposition the existing window retainers as required and drill 2.2 mm diameter all the screw attaching holes and 3.28 to 3.35 mm diameter all the riveting holes copying from the existing holes on the retainers. During drilling operation, force adequately the retainers against the window panel, in order to assure a proper installation. For all the aircraft: 17. Install the window retainers using the screws P/N NOR x6.5-CSZ or the blind rivets P/N , as required. 18. Referring to drawing R.0483, mask only the external area of the new bubble window panels for about 2 mm around the skin frame contour, to allow the proper sealing; Page 5 of 11

6 2. INSTALLATION INSTRUCTIONS (Cont.) Part A (Cont.) 19. Referring to drawing R.0483, seal the new bubble windows with POLI BOND Polyurethane Sealant manufactured by SARATOGA or equivalent, filling 3 mm free area inside and around the skin frame contour and 2 mm previously masked area around the same contour. Leave the sealant to polymerize in accordance with the manufacturer s instructions; Only for aircraft previously equipped without bubble windows: 20. Referring to drawing R.0483, position and install the moulding P/N NV A around the window frame contour of the upholstery panels, in order to close the gap between it and the new bubble windows; For all the aircraft: 21. Reinstall the removed upholstery panel on the cabin entrance door and on the emergency exit window, as previously. Reinstall the handle on the cabin entrance door; 22. Where removed, reinstall the track curtain and curtain as previously; 23. Reposition and reinstall the cabin entrance door and the emergency exit window on the fuselage as previously; 24. Secure the emergency exit window release lever with 0.2 mm diameter copper wire as previously; 25. Where necessary, touch up with polyurethane paint the external skin of the cabin entrance door and of the emergency ext window, matching the existing livery; 26. Remove the masking tape and the protective film from the bubble window and if necessary clean it in accordance with the standard maintenance practices; Only for aircraft previously equipped with bubble windows without porthole: 27. Record compliance with Part A of this Service Bulletin in the aircraft Log-Book. Only for aircraft previously equipped without bubble windows: 28. Proceed with the following Part B. Page 6 of 11

7 2. INSTALLATION INSTRUCTIONS (Cont.) Part B: Installation of a half ring adapter just FWD each static port and installation of a new longer bump stop for the cabin entrance door. (This Part B is applicable only to aircraft previously equipped without bubble windows) 1. Remove baggage bulkhead to gain access to the inside installation area of the static ports, located on the left and right side of the fuselage skin between the fuselage frames Nos. 11 and 12; 2. Referring to drawing R.0483, position the half ring adapter P/N just FWD each static port and drill 3.5 mm diameter No. 3 holes for each installation, copying from the existing holes on the half ring adapter; 3. Deburr all the holes previously carried out. Clean all the concerned areas with Methyl Ethyl Ketone or equivalent cleaning solvent and where necessary, touch up them with Alodine 1200 (MIL-C-5541) and then with Epoxy Primer (MIL- PRF ); 4. Referring to drawing R.0483, reposition each half ring adapter P/N in place just FWD each static port and install it using No. 3 screw P/N MS24693-S28 and No. 3 nuts P/N MS21083N06; 5. Remove the lateral inboard left engine cowling to gain access to the inside installation area of the cabin entrance door bump stop, installed on the inboard side of the engine nose cowling; 6. Referring to drawing R.0483, remove the existing bump stop of the cabin entrance door and install the new longer bump stop P/N , using No. 2 screw P/N MS , No. 2 lock washer P/N MS and No. 2 washer P/N NAS1149FN816P; 7. Paint the half ring adapters installed just FWD static ports and the new bump stop of the cabin entrance door with polyurethane paint matching the existing livery; 8. Reinstall the baggage bulkhead as previously; 9. Reinstall the lateral inboard left engine cowling as previously; 10. Record compliance with Part A and Part B of this Service Bulletin in the aircraft Log-Book. Page 7 of 11

8 3. MATERIALS REQUIRED FOR THE MODIFICATION Kit SB 221 (Include bubble windows without porthole) Applicable only to aircraft previously equipped without bubble windows ITEM PART NUMBER DESCRIPTION QTY Bubble Window Cabin Entrance Door Bubble Window Emergency Exit Window 1 3 NV A Moulding 5 Mt. 4 NAS1149FN816P Washer Bump Stop Cabin Entrance Door 1 6 MS Screw 2 7 MS Lock Washer Half Ring Static Source Adapter 2 9 MS24693-S28 Screw 6 10 MS21083N06 Nut Blind Rivet 8 12 NV Sealant Tape 10 Mt. 13 NOR X6.5-CSZ Screw DRWG R.0483 (*) Installation Drawing of New Bubble Windows on Cabin Entrance Door and Emergency Exit Window 1 (*) Latest applicable revision Page 8 of 11

9 3. MATERIALS REQUIRED FOR THE MODIFICATION (Cont.) Kit SB 221/A (Include bubble windows with porthole) Applicable only to aircraft previously equipped without bubble windows ITEM PART NUMBER DESCRIPTION QTY Bubble Window Cabin Entrance Door Bubble Window Emergency Exit Window 1 3 NV A Moulding 5 Mt. 4 NAS1149FN816P Washer Bump Stop Cabin Entrance Door 1 6 MS Screw 2 7 MS Lock Washer Half Ring Static Source Adapter 2 9 MS24693-S28 Screw 6 10 MS21083N06 Nut Blind Rivet 8 12 NV Sealant Tape 10 Mt. 13 NOR X6.5-CSZ Screw DRWG R.0483 (*) Installation Drawing of New Bubble Windows on Cabin Entrance Door and Emergency Exit Window 1 (*) Latest applicable revision Page 9 of 11

10 3. MATERIALS REQUIRED FOR THE MODIFICATION (Cont.) Kit SB 221/B (Include bubble windows with porthole) Applicable only to aircraft previously equipped with bubble windows without porthole ITEM PART NUMBER DESCRIPTION QTY Bubble Window Cabin Entrance Door Bubble Window Emergency Exit Window Blind Rivet 8 4 NV Sealant Tape 10 Mt. 5 NOR X6.5-CSZ Screw 32 6 DRWG R.0483 (*) Installation Drawing of New Bubble Windows on Cabin Entrance Door and Emergency Exit Window 1 (*) Latest applicable revision Commercially available materials required but not included in the Kit: POLI BOND Polyuretane Sealant manufactured by SARATOGA or equivalent; Methyl-Ethyl-Ketone or equivalent cleaning solvent; Alodine 1200 (MIL-C-5541); Epoxy Primer (MIL-PRF-23377); Polyurethane paint matching the existing livery. Page 10 of 11

11 Page to be considered as reference for spare parts. Figure 1 Bubble Windows Installation Page 11 of 11