First Issue dated 08/04/2005 Rev. 1 Dated 29 November 2010

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vulcanair spa via g. pascoli, 7 80026 casoria (na) – italia Tel +39 081 5918111 Fax +39 081 5918172 info@vulcanair.com www.vulcanair.com

P68 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. 135 Rev. 1

Design Organisation Approval No. AS-SB/10/023 dated 29 Nov. 2010

INFORMATION SUBJECT: NEW CABIN HEATING SYSTEM INSTALLATION

NOTE Revision 1 of this Service Bulletin has been issued to extend its applicability also to P.68C aircraft S/N 402 and to include correction of typing errors in the previous issue. Aircraft that have already complied with the previous issue of this Service Bulletin are exempt from application of this Revision 1. This Service Bulletin issued also in Italian language as first issue is now issued only in English language; the Italian language will no longer be updated.

1. GENERAL

1.1 AIRCRAFT AFFECTED All P.68C and P.68 Observer 2 aircraft S/N 384, 393, 402 and from S/N 411 up to and including S/N 435 (excluded S/N 423 and 427).

1.2 PURPOSE To supply information for the retrofit installation of a cabin heating system through heat exchangers installed on the exhaust mufflers.

Vulcanair S.p.A. Service Bulletin No. 135

First Issue dated 08/04/2005 Rev. 1 Dated 29 November 2010

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1. GENERAL (Cont.)

1.3 DESCRIPTION Compliance with this Service Bulletin requires the installation of Kit SB135 for P68 Observer 2 aircraft and Kit SB 135/A for P68C aircraft to be carried out in accordance with the instructions contained in the latest applicable revision of Service Instruction No. 81. The installation of the above mentioned Kits foresee the following operations:

Removal of the heat exchangers P/N 6.1093-1 (LH) and P/N 6.1093-2 (RH) from the exhaust mufflers;

Installation of the new heat exchangers P/N 6.1037-1 (LH) and P/N 6.1037-2 (RH) on the exhaust mufflers;

Installation of Shut-Off Valves P/N 7.6041-1 (LH) and P/N 7.6041-2 (RH) on the respective LH and RH wings;

Installation of the routing and outlets for the cabin heating system; Installation of the cabin heating system controls; Updating of the applicable aircraft documentation;

NOTE: This new cabin heating system is actually a minor modification of the system already certified and installed on P.68C and P.68Observer 2 aircraft up to S/N 409 (S/N 402 is excluded). Therefore, the Maintenance Program published to date in the applicable documentation issued by Vulcanair S.p.A. and the local certifying authority will remain valid also for this new cabin heating system .

Hereunder is a brief description of how the cabin heating system functions: The air coming from an air inlet located on the wing leading edge is heated when it passes through the heat exchangers installed on the exhaust mufflers. A shut-off valve installed on each wing allows the air flow through the cabin distribution hoses to be opened or shut-off. On the P68 Observer 2 aircraft, the shut-off valves are mechanically activated by levers installed on the RH side of the pilot’s overhead panel while on the P68C aircraft, they are activated by knobs installed on the lower RH side of the instruments panel. The heated air is diffused in the cabin through 5 adjustable air outlets positioned as follows: • 2 hot air outlets at Pilot’s and Co-Pilot’s Seats • 2 hot air outlets at Second Row Passenger Seats • 1 hot air outlets at Third Row Passenger Seats

The new cabin heating system may be installed in addition of the electrical heating system currently on installed.

Vulcanair S.p.A. Service Bulletin No. 135

First Issue dated 08/04/2005 Rev. 1 Dated 29 November 2010

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1. GENERAL (Cont.)

1.4 COMPLIANCE At owner’s discretion.

1.5 MANHOURS

The time necessary for the application of this Service Bulletin is estimated as being 80 man-hours, which includes the time required to access the parts and to return the aircraft to an airworthy condition.

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 • Latest applicable revision of Service Instruction No. 81; • Applicable Maintenance Manual for aircraft variant; • Applicable Parts Catalogue for aircraft variant;

1.10 PUBBLICATIONS AFFECTED

• Applicable Flight Manual for aircraft variant; • Applicable Parts Catalogue for aircraft variant; • Applicable Maintenance Manual for aircraft variant.

1.11 ODIFICATION TO BE CARRIED OUT BY

Vulcanair S.p.A. or Certified Maintenance Facility.

Vulcanair S.p.A. Service Bulletin No. 135

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2. INSTALLATION INSTRUCTIONS PREAMBLE : Due to the complexity of the modification, it may be necessary to contact Vulcanair for the solution of possible problems that could arise during installation of the Kits .

1. Install Kit SB135 or SB135/A as applicable, in accordance with the latest revision of Service Instruction No. 81;

2. Only for P.68C and P.68 Observer 2 aircraft from and including S/N 411 onwards, update the Aircraft Flight Manual by inserting the latest applicable revision, to be downloaded by Vulcanair web-site www.vulcanair.com;

Note: For P.68 Observer 2 aircraft S/N 384 and 393 and P.68C aircraft S/N 402 no Flight Manual updating is required since their manuals already embody this modification.

3. Record compliance with this Service Bulletin in the Aircraft Log Book.

Vulcanair S.p.A. Service Bulletin No. 135

First Issue dated 08/04/2005 Rev. 1 Dated 29 November 2010

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3. MATERIALS REQUIRED FOR THE MODIFICATION

Kit SB 135 (For P68 Observer 2 aircraft)

ITEM P/N DESCRIPTION Q.TY 1 AN335-5 Nut 8 2 NAS1149F0563P Washer 8 3 MS35333-41 Lock Washer 8 4 NOR7.019-7 Gasket 8 5 6.1037-1 LH Heat Exchanger 1 6 6.1037-2 RH Heat Exchanger 1 7 NOR9.241-4.2X13-A2 Screw 14 8 NOR9.173-7 Fast Nut 14 9 NOR7.191-11 Adapter 2

10 NOR7.191-3 Adapter 2 11 MS20470AD4-6 Rivet 8 12 7.6041-1 LH Shut-off Valve 1 13 7.6041-2 RH Shut-off Valve 1 14 MS35206-331 Screw 20 15 NAS1149FN816P Washer 20 16 MS21083N08 Nut 12 17 7.6043-11 Flanged Pipe 2 18 NOR7.219-2 Grommet 3 19 NOR7.439-4 Hose 2 20 NOR7.439-5 Hose 2 21 NOR7.439-7 Hose 2 22 7.6039-8 Hose 2 23 7.6039-11 Hose 1 24 7.6039-9 Hose 1 25 7.6039-12 Hose 1 26 NOR7.427-8 Serflex Clamp 14 27 NOR7.427-18 Serflex Clamp 8 28 2.3265-2 Reinforcement 1 29 MS20470AD4-5 Rivet 4 30 7.6173-1 RH Front Hot Air Outlet 1 31 7.6173-2 LH Front Hot Air Outlet 1 32 7.6173-5 RH Centre Hot Air Outlet 1 33 7.6173-6 LH Centre Hot Air Outlet 1 34 2.2085-401 RH Rear Hot Air Outlet 1 35 NAS1097AD4-4 Rivet 12 36 4801-0407 “Avdel” Blind rivet 120 37 7.6035-1 Heating Outlet Regulator 5 38 NOR9.243-3.5x13-CSZ Self Tapping Screw 15 39 7.6181-7 Lever 2

Vulcanair S.p.A. Service Bulletin No. 135

First Issue dated 08/04/2005 Rev. 1 Dated 29 November 2010

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3. MATERIALS REQUIRED FOR THE MODIFICATION (Cont.)

Kit SB 135 (Cont.) (For P68 Observer 2 aircraft)

ITEM P/N DESCRIPTION Q.TY 40 7.6181-6 Knob 2 41 MS24693-S49 Screw 2 42 AN4-16A Screw 1 43 7.6181-5 Bushing 1 44 MS20002-C4 Washer 1 45 NAS1149F0432P Washer 4 46 MS21083N4 Nut 3 47 7.6181-9 Screw 1 48 AN316-4R Nut 1 49 7.6183-1 Control Cable 2 50 NOR7.169-3 Sleeve Retainer 2 51 NOR7.219-3 Grommet 3 52 MS21266-1N Nylon Gasket 7 53 MS20470AD4-4 Rivet 50 54 NOR7.701-1B Tie Wrap 10 55 8.2109-11 Placard 1 56 DELETED

Commercially available material required but not included in Kit SB 135 : Single-component adhesive sealant SIKAFLEX-221 manufactured by “SIKA GROUP” or equivalent (Specification TT-S-00230).

Vulcanair S.p.A. Service Bulletin No. 135

First Issue dated 08/04/2005 Rev. 1 Dated 29 November 2010

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3. MATERIALS REQUIRED FOR THE MODIFICATION (Cont.)

Kit SB 135/A (For P68C aircraft)

ITEM P/N DESCRIPTION Q.TY 1 AN335-5 Nut 8 2 NAS1149F0563P Washer 8 3 MS35333-41 Lock Washer 8 4 NOR7.019-7 Gasket 8 5 6.1037-1 LH Heat Exchanger 1 6 6.1037-2 RH Heat Exchanger 1 7 NOR9.241-4.2X13-A2 Screw 14 8 NOR9.173-7 Fast Nut 14 9 NOR7.191-11 Adapter 2

10 NOR7.191-3 Adapter 2 11 MS20470AD4-6 Rivet 8 12 7.6041-1 LH Shut-off Valve 1 13 7.6041-2 RH Shut-off Valve 1 14 MS35206-331 Screw 20 15 NAS1149FN816P Washer 20 16 MS21083N08 Nut 12 17 7.6043-11 Flanged Pipe 2 18 2.3820-002 Reinforcement 1 19 MS20470AD4-5 Rivet 20 20 NOR7.219-2 Grommet 3 21 NOR7.439-4 Hose 2 22 NOR7.439-5 Hose 2 23 NOR7.439-7 Hose 2 24 7.6039-8 Hose 2 25 7.6039-10 Hose 1 26 7.6039-1 Hose 2 27 NOR7.427-8 Serflex Clamp 14 28 NOR7.427-18 Serflex Clamp 8 29 2.2082-402 RH Front Hot Air Outlet 1 30 2.2082-401 LH Front Hot Air Outlet 1 31 2.2086-401 RH Centre Hot Air Outlet 1 32 2.2084-401 LH Centre Hot Air Outlet 1 33 2.2085-401 RH Rear Hot Air Outlet 1 34 NAS1097AD4-4 Rivet 12 35 4801-0407 “Avdel” Blind Rivet 200 36 7.6035-1 Heating Outlet Regulator 5 37 NOR9.243-3.5x13-CSZ Self Tapping Screw 15

Vulcanair S.p.A. Service Bulletin No. 135

First Issue dated 08/04/2005 Rev. 1 Dated 29 November 2010

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3. MATERIALS REQUIRED FOR THE MODIFICATION (Cont.)

Kit SB 135/A (Cont.) (For P68C aircraft)

ITEM P/N DESCRIPTION Q.TY 38 NOR7.285-1 Control Cable 2 39 MS21919-DG8 Clamp 1 40 MS35206-331 Screw 1 41 NAS1149FN816P Washer 1 42 MS21083N08 Nut 1 43 NOR7.415-5A Grommet 3 44 MS21266-1N Nylon Gasket 7 45 MS20470AD4-4 Rivet 50 46 7.2045-3 Cables Bracket 2 47 NOR9.241-2.9x6.5-CSZ Self Tapping Screw 2 48 NAS1149FN416P Washer 2 49 NOR7.701-1B Tie Wrap 20 50 8.2109-12 Placard 1 51 DELETED

Commercially available material required but not included in Kit SB 135/A : Single-component adhesive sealant SIKAFLEX-221 manufactured by “SIKA GROUP” or equivalent (Specification TT-S-00230).

Vulcanair S.p.A. Service Bulletin No. 135

First Issue dated 08/04/2005 Rev. 1 Dated 29 November 2010

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Fig . 1 - Layout of Cabin Heating System for P68Observer 2 aircraft -

Vulcanair S.p.A. Service Bulletin No. 135

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Fig. 2 - Layout of Cabin Heating System for P68Observer 2 aircraft (Details Ref. Fig. 1)-

Vulcanair S.p.A. Service Bulletin No. 135

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Fig . 1A

- Layout of Cabin Heating System for P68C aircraft -

Vulcanair S.p.A. Service Bulletin No. 135

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Fig. 2A

- Layout of Cabin Heating System for P68C aircraft (Details Ref. Fig. 1A)-