No. 141

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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. 141 Design Organisation Approval No. AS-SB/06/009 dated 14/11/2006

INFORMATION

SUBJECT: RETROFIT OF THE “KEITH” AIR CONDITIONING SYSTEM

1. GENERAL 1.1 AIRCRAFT AFFECTED All P68 series aircraft from S/N 411 onwards on which the Keith Air Conditioning System is to be retrofitted.

1.2 PURPOSE The purpose of this bulletin is to inform owners of the above mentioned aircraft, that should they wish to retrofit their aircraft with an air conditioning system manufactured by “KEITH PRODUCT INC. – Dallas - USA”, Kit SB141/1 comprising the mechanical parts and Kits SB141/2 or SB141/3 as applicable, comprising the electrical parts are now available for installation in accordance with the latest applicable revision of the Service Instruction No. 84.

1.3 DESCRIPTION The air conditioner consists of two main units as follows: • •

Compressor/Condenser Vulcanair P/N NOR7.499-2 (Keith P/N: JBS 5002-3); Evaporator/Fan Vulcanair P/N NOR7.499-3 (Keith P/N: JBS 2046-1).

First Issue dated 06/11/2006

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Service Bulletin No. 141

1. GENERAL (Cont.) 1.3 DESCRIPTION (Cont.) The Compressor/Condenser and the Evaporator/Fan are installed on a proper mechanical interface in light alloy which is fixed to the fuselage structure between frame numbers 11 and 12 immediately behind the baggage compartment bulkhead. The air conduit currently installed on board for the circulation of fresh air in the cabin, is also used for the circulation of the air from the conditioner through the existing outlets. A grid installed in the bulkhead of the baggage compartment, near the Evaporator, permits the air in the cabin to be recycled. A hole drilled on the outer skin on the right hand side of the fuselage in the area between frame numbers 11 and 12, allows outside air to enter through a flexible tube going towards the condenser which is properly covered by a plenum. A hole drilled on the left side of the tail boom, between frame numbers 11 and 12, allows the air coming from the condenser to discharge outside the aircraft through flexible hoses. A proper conveyor facilitates said discharge during flight. In the event of infiltration of rain water, tubing on this conveyor allows drainage through a pipe installed in the fuselage bottom between frame numbers 11 and 12 Two flexible hoses, one coming from the air intake and one installed under the plenum converge to a second drainage pipe installed in the fuselage bottom between frame numbers 11 and 12 allowing drainage of condensate and/or infiltration of rain water A flexible hose discharges condensate from the evaporator outside the aircraft through a third drainage pipe installed in the fuselage bottom between frame numbers 11 and 12 28 Volt continuous power is necessary to operate the air conditioning system with a requirement of 85 Amperes for the compressor and 7 Amperes for the fan, for a total of 92 Amperes. The power for the compressor is obtained from the power panel through a 100 Amp breaker, while a 15 Amp breaker protects the circuit for the fan. In the event of a malfunction on one of the two generators, a cut-off system automatically disactivates the air conditioner with the exception of the fan which continues functioning. However if necessary, the pilot can also manually disactivate the system by positioning the AIR COND-OFF-FAN switch on the breaker panel to OFF. The system can only be activated with both Alternators functioning. When the aircraft is on ground with the engines shut-off, external power is required to activate the air conditioning system.


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1. GENERAL (Cont.) 1.3 DESCRIPTION (Cont.) Three control switches for the air conditioning system are installed on the breaker panel and identifiable as follows: a) Switch: “HEAT FAN – OFF – AIR COND” b) Switch: “AIR COND – OFF – FAN” c) Switch: “HIGH – LOW” The above mentioned switches are already installed on all aircraft affected by this bulletin but carry a sticker stating “NOT USED”. When the switches are electrically connected, the stickers must be removed. For the maintenance procedures of the air conditioning system installed on the P68 Observer 2 e P68TC Observer aircraft, refer to the la test revision of the Supplement to the Maintenance Manual NOR10-771-2A and to Supplement to the Maintenance Manual NOR10-771-2B for the P68C aircraft. Refer to the latest applicable revision instructions for filling the refrigerant .

of the “Keith Service Manual TR-134”.for

Refer to the la test revision of Service Instruction No. 84 for the functional tests of the air conditioning system and tests for interference on the round.

1.4 TIME OF COMPLIANCE At owner’s discretion.

1.5 MANHOURS REQUIRED The time necessary for the application of this Service Bulletin is estimated as being 130 man-hours including the time required to access the parts and to release the aircraft to service.

1.6 SPECIAL TOOLS No special tools are required to install the air conditioning system. Refer to the latest revision of the “Keith Service Manual TR-134” included in Kit SB141/1 for tools required for the filling and emptying of the refrigerant.

1.7 VARIATION IN WEIGHT AND BALANCE The aircraft will have to be reweighed to determine the new empty weight and centre of gravity.

1.8 ELECTRICAL SYSTEM LOAD Maximum required load = 92 Amperes


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1. GENERAL (Cont.) 1.9 REFERENCE DOCUMENTS • • • • • •

Applicable Maintenance Manual for Aircraft Type; Drawing No. R.0336; Drawing No. R.0405-1 ; Drawing No. R.0405-2 ; Service Instruction No. 84 “Retrofit of the Keith Air Conditioning System” ; “KEITH Service Manual TR-134”.

1.10 PUBLICATIONS AFFECTED

• Applicable Flight Manual for Aircraft Type; • Applicable Maintenance Manual for Aircraft Type; • Applicable Parts Catalogue for Aircraft Type.

1.11 MODIFICATION TO BE CARRIED OUT BY: Vulcanair S.p.A. or Certified Maintenance Facility.

2. INSTRUCTIONS FOR COMPLYING WITH THE SERVICE BULLETIN 1. The modification should be carried out in accordance with the latest applicable revision of Service Instruction No. 84 “Retrofit of the Keith Air Conditioning System”; 2. Update the Aircraft Flight Manual by inserting the la test applicable revision in accordance with the Table on Page 8. For P68C aircraft only, also update the Equipment List P/N NOR10.719-1 by inserting Revision No. 9; 3. In Figure 8-1 on Page 8-iv in Section 8 of the Flight Manual, record the insertion of Supplement G/1 which is included in the applicable revision to the Flight Manual.; 4. Reweigh the aircraft to determine the new Empty Weight and Centre of Gravity and update the Flight Manual with the new data; 5. Update the aircraft’s maintenance programme and procedures in accordance with the information contained in the relative Supplements to the Maintenance Manual listed in the Table on Page 8; 6. Record compliance with this Service Bulletin in the Aircraft Log Book.


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3. MATERIALS REQUIRED FOR THE MODIFICATION KIT SB141/1 – MECHANICAL COMPONENTS ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

PART NUMBER NOR7.499-2 NOR7.499-3 NOR7.499-4 MS35206-230 NAS1149FN616P MS210083N06 7.9501-14 A-7.9809-1 7.9193-6 7.9193-2 7.9193-5 NOR7.427-32 7.9501-15 7.9501-16 NOR7.427-25 MS35489-14 7.9501-23 NOR7.427-23 MS20470AD4-5 1661-0410 AN4-21A NAS1149F0463P A-7.9807-4 A-7.9807-5 AN3-12A NAS1149F0332P MS21042-3 NOR7.419-5 A-7.9807-6 NOR7.499-30 NOR7.499-13 NOR7.499-27 NOR7.499-28 NOR7.417-9E NOR7.701-1C NOR9.137-6 NOR9.205-1 NOR9.173-8 AN821-80 NAS1149F0363P


DESCRIPTION Compressor/Condenser Evaporator/Fan Grid Screw Washer Nut Flexible Hose Drainage Pipe Air Discharge Conveyor Grid Air Discharge Tube Clamp Flexible Hose (L=1200mm) Flexible Hose (L=800mm) Clamp Grommet Flexible Hose (L=500mm) Clamp Rivet Avex Type Blind Rivet Bolt Washer Spacer Spacer Bolt Washer Nut Self Adhesive Gaskets (L=2000mm) Conduit Box Flexible Hose Flexible Hose Sleeve Sleeve Tie Wrap Tie Wrap Screw Washer Quick Nut Union Elbow Washer

QTY. 1 1 1 4 4 4 2 3 1 1 1 4 3 1 12 1 1 2 9 24 4 4 4 4 4 8 4 1 1 1 1 1 1 4 2 4 4 4 1 2

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3. MATERIALS REQUIRED FOR THE MODIFICATION (Cont.) KIT SB141/1 – MECHANICAL COMPONENTS (Cont.) ITEM 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 59 60 61 62 63 64

PART NUMBER

DESCRIPTION

QTY.

NV7.001-42 NOR7.499-11 7.9504-401 7.9502-013 7.9502-012 AGS4717-410 7.9502-401 7.9502-402 MS35206-244 NAS1149FN816P MS21919WDG8 NOR7.417-5D NOR7.427-25 NOR7.101-4 NOR7.441-5 MS35206-246 NAS1149FN832P MS35206-242 MS35206-230 NAS1149FN616P MS21083N06 7.9513-2 R.0405-2

Filler Valve 1 Union Reduction 1 Air Intake 1 Flange 1 Grid 1 Rivet 22 Left Half Plenum 1 Right Half Plenum 1 Screw 6 Washer 7 Clamp 2 Clamp Support 2 Clamp 6 Union 1 Flexible Hose 500mm Screw 3 Washer 3 Screw 1 Screw 4 Washer 4 Nut 4 Placard “Air Conditioning – Operational Limits” 1 Installation Drawing -Keith Air Conditioning System 1 Installation Drawing -Keith Compressor/Condenser & R.0336 1 Evaporator/Fan Assembly “KEITH Service Manual” TR-134 (Latest Applicable Revision) 1


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3. MATERIALS REQUIRED FOR THE MODIFICATION (Cont.) KIT SB141/2 – ELECTRICAL COMPONENTS Applicable for P68 aircraft from Serial Number 411 up to Serial Number 436 excluding Serial Numbers 432 and 43.3 ITEM

PART NUMBER

1 2 3 4 5 6 7 8 9 10 11 12 13 14

MS25361-100 MS35214-25 NAS1149F0432P AN4-4A 7.3221-10 NOR7.611-5 NOR7.467-10E NV7.001-7 NOR9.215-M5x16-A2 NOR9.251-M5-A4 NOR9.227-M5-C8 NOR9.247-M5-A2 7.2227-15 7.7093-447

15

R.0405-1

DESCRIPTION 100 Ampere Breaker Screw Washer Screw Power Cable Bayonet Terminal Amp 320555 Insulation Sleeve Insulation Hood Screw Lock Washer Nut Washer Bus Bar Power Cable – Switch “AC/OFF/FAN” Installation Drawing: “Keith Air Conditioning Electrical System”

QTY. 1 2 2 2 1 1 50mm 2 1 1 1 3 1 1 1

KIT SB141/3 - ELECTRICAL COMPONENTS Applicable for P68 Aircraft S/Numbers 432, 433 and from Serial Number 437 onwards. ITEM PART NUMBER DESCRIPTION QTY. 1 MS25361-100 100 Ampere Breaker 1 2 MS35214-25 Screw 2 3 NAS1149F0432P Washer 2 4 AN4-4A Screw 2 5 7.3221-10 Power Cable 1 6 NOR7.611-5 Bayonet Terminal Amp 320555 1 7 NOR7.467-10E Insulation Sleeve 50mm 8 NV7.001-7 Insulation Hood 2 9 NOR9.215-M5x16-A2 Screw 1 10 NOR9.251-M5-A4 Lock Washer 1 11 NOR9.227-M5-C8 Nut 1 12 NOR9.247-M5-A2 Washer 3 13 7.3221-25 Power Cable – Terminal/Breaker 1 14 NOR7.415-1 Insulation Hood 1 14 7.7093-447 Power Cable – Switch “AC/OFF/FAN” 1 Installation Drawing: “Keith Air Conditioning 15 R.0405-1 1 Electrical System”


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3. MATERIALS REQUIRED FOR THE MODIFICATION (Cont.) Commercially available material required but not included in the Kits : Single-component polyurethane sealant POLIBOND manufactured by “SARATOGA” or other equivalent product. Together with the above mentioned Kits, order the applicable Maintenance Manual Supplement as indicated in the chart hereunder from Vulcanair : Aircraft P68 C P68TC OBSERVER P68 OBSERVER 2


Maintenance Manual

Flight Manual

Equipment List

Supplement NOR 10.771-2B 1st Issue

NOR10.707-1B Revision 16

NOR10.719-1 Revision 9

Supplement NOR 10.771-2A 2nd Issue

NOR10.707-8B Revision 18 NOR10.707-4B Revision 8

N.A N.A

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Figure 1 Pre-modification - Removal of existing Air Blower First Issue dated 06/11/2006

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Refer to this page when reordering parts.

Figure 2 Post-modification - Air Conditioning System Applicable for P68 Observer 2 e P68TC Observer Aircraft (Reference Drawings R.0336 e R.0405-2) First Issue dated 06/11/2006

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Figure 3 Post-modification - Air Conditioning System Applicabile for P68C Aircraft (Reference Drawings R.0336 e R.0405-2) First Issue dated 06/11/2006

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Figure 4 Post-modification - Installation of Plenum on the Compressor/Condenser Unit (Reference Drawing R.0405-2) First Issue dated 06/11/2006

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Figure 5 Post-modification - Installation of 100 Amp Breaker on the LH Power Panel located on cabin roof between fuselage frame numbers 8 and 9 (Reference Drawing R.0405-1) First Issue dated 06/11/2006

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