PIAGGIO AERO INDUSTRIES S.p.A. Via Cibrario, 4 – 16154 Genoa, Italy Product Support Department

Original Issue: April 21, 2011 Service Bulletin: 80-0330
Rev. N. 0 Date: Page: 1 of 9 The EASA states mandatory compliance with inspect ions, modifications or te chnical directives and related time compliance by means of relevant Airworthiness Directives. SERVICE BULLETIN (MANDATO RY) N.: 80-0330 REV.0 ATA CHAPTER: 53-00 MODIFICATION N.: N/A TITLE: F USELAGE DRAIN HOLES F RAME 36

– R EWORK
REVISION STATUS OF THE BULLETIN This Service Bulletin is at the origin al issue and consists of 9 pages.
1. PLANNING INFORMATION

A. EFFECTIVITY Part A: Piaggio Aero Industries P180 Avanti and Avanti II, Manufacturer’s Serial Number (MSN): 1002, 1004-1218.

Part B: Piaggio Aero Industries P180 Avanti and Avanti II, Manufacturer’s Serial Number (MSN): 1002, 1004-1213, not compliant with SB 80- 0291 and that did not add drain holes as per ASB-80-0324, step 5 (refer to EASA EAD 2010-0269E, FAA 2011-01-53 and FAA 2011-01-51). Manufacturer’s Serial Number 1214-1218, with DMT 80-0978 (technically equivalent to SB-80-0291) embodied in production, are not required to comply with Part B.

B. CONCURRENT REQUIREMENTS N/A.

C. REASON Following issuance of Alert Service Bulletin ASB-80-0324 (mandated by EASA EAD 2010- 0269E and FAA EAD 2011-01-53), a further occurren ce of blockage of f light controls in flight was reported by a P180 operator. During accomplishment of ASB-80-0324 on the affected airplane, no defects were noted, nor water or ice accumulati on were reported. As a consequence, additional drain holes were not drilled, nor SB-80-0291 was accomplished. Additional maintenance actions are required to improve drainage system effectivity.

D. DESCRIPTION
General This MANDATORY Service Bulletin consists of the following: Part A

- Removal of central floor panels in th e cabin and inspection of fuselage belly.

- Cutting of the rubber flap of the 2 aft flapper valves.PIAGGIO AERO INDUSTRIES S.p.A. Via Cibrario, 4 – 16154 Genoa, Italy Product Support Department

Original Issue: April 21, 2011 Service Bulletin: 80-0330
Rev. N. 0 Date: Page: 2 of 9 - Functional test of th e fuselage drain holes. Part B

- Drilling of addi tional drain holes

- Communication to Piaggio Aero In dustries of inspection results.

E. COMPLIANCE This MANDATORY Service Bulletin must be accomplished as follow:
Part A: within 10 Flight Hours / 10 Days (whichever occurs first) from the issue date of this service bulletin

Part B: within 150 Flight Hours / 90 days (whichever occurs first) from the issue date of this service bulletin. Inspection intervals toleran ce defined in Aircraft Maintenance Manual, section 05-20-00, may be applied.
In compliance with this Service Bulletin, please complete the attached Confirmation Slip and sent it back to Piaggio Aero Industr ies S.p.A. – Product Support Department.

F. APPROVAL The technical content of this Service Bulletin has been approved under the Authority of DOA No EASA.21J.220.

G. MANPOWER This MANDATORY Service Bulletin ma y be accomplished in approximately: Part A: 4 man-hours. Part B: If alternative pro cedure is used: 5 man hours. If SB-80-0291 is embodied during a “C” or “D” check, 40 man hoursPIAGGIO AERO INDUSTRIES S.p.A. Via Cibrario, 4 – 16154 Genoa, Italy Product Support Department

Original Issue: April 21, 2011 Service Bulletin: 80-0330
Rev. N. 0 Date: Page: 3 of 9 H. TECHNICAL INFORMATION For questions concerning the technical conten t of this Service Bulletin, please contact: Piaggio Aero Industries – Product Support Department Via Cibrario, 4 - 16154 Genoa, Italy Fax No. : + 39 010 6481 374 E-mail: tech.support@piaggioaero.it

I. MATERIAL – COST AND AVAILABILITY Please contact: Piaggio Aero Industries – Product Support Department Via Cibrario, 4 - 16154 Genoa, Italy Telephone No.: +39 010 6481 741 Fax No.: +39 010 6481 891 E-Mail: aftersales_commercial@piaggioaero.it

J. TOOLING – COST AND AVAILABILITY No special tools are required.

K. WEIGHT AND BALANCE N/A

L. ELECTRICAL LOAD DATA N/A

M. REFERENCES

Document Title Document Number Chapter

Aircraft Maintenance Manual (AMM) Report no. 9066 Report no. 180-MAN-0200-01105 Ch. 06-00-00 24-00-00

N. PUBLICATIONS AFFECTED N/APIAGGIO AERO INDUSTRIES S.p.A. Via Cibrario, 4 – 16154 Genoa, Italy Product Support Department

Original Issue: April 21, 2011 Service Bulletin: 80-0330
Rev. N. 0 Date: Page: 4 of 9 2. ACCOMPLISHMENT INSTRUCTIONS

Part A 1. Remove the electrical power (Ref. AMM Chapter 24-00-00). 2. Remove the carpet from the aisle in the passeng er compartment: the carp et is installed on the aircraft with Velcro, remove it by hand. 3. Remove the aisle floor panels 231 ALF, 231 FLF, 231 MLF, 231 QLF (Ref. AMM Chapter 06- 00-00). 4. Cut off the rubber flap of the two (2) flapper valv es (near FR 36) – refer to figure 1. To protect the fuselage skin, use an aluminum sheet placed below the rubber flap.

Figure 1 – Flapper valves – Frame 36

5. Clean the fuselage belly, removing debr is. A vacuum cleaner may be usedPIAGGIO AERO INDUSTRIES S.p.A. Via Cibrario, 4 – 16154 Genoa, Italy Product Support Department

Original Issue: April 21, 2011 Service Bulletin: 80-0330
Rev. N. 0 Date: Page: 5 of 9

6. Inspect the four (4) flapper valv es (two near FR 20, two near FR 32) to verify if they are clogged, stuck to the fuselage skin, or laying against the skin for their entire length.

a. Clean any clogged flapper valve. Take not e of any clogged flapper valve and its position. b. Carefully free any stuck flapper valve. Take note of any stuck flapper valve and its position.

c. If – after cleaning and repositi oning – the rubber flap is st ill laying ag ainst the skin for its entire length, cut off the rubber flap. Replace it at the next A check. NOTE: RUBBER FLAP REMOVED FROM FLAPPER VALVES NEAR FR 36 MUST NOT BE REPLACED. 7. Make a test of “valves and drain holes” as described:

a. Place an adequate amount of water in each bay between FR 19 and FR 36 (SEE FIG 2 attached) to verify that the water is conveyed in the central bays and that is drained. At least one half US Gal / appr oximately 2 liters may be used. NOTE: TAKE CARE NOT TO COME IN CONTACT WITH ELECTRICAL CONNECTORS WHILE POURING WATER. b. Steady stream of water should be observed coming from the external drain holes. If not, the flapper valve does not drain properly. Cut off the rubber flap, then replace the flapper valve at next scheduled check. Ta ke note of any cut rubber flap and its position. NOTE: RUBBER FLAP REMOVED FROM FLAPPER VALVES NEAR FR 36 MUST NOT BE REPLACED.

c. Dry the fuselage belly. If Part B will be performed concurren tly with Part A, skip to step 11. If Part B will be performed later, proceed with step 8. 8. Install the aisle floor panels 231 ALF, 231 FLF, 231 MLF, 231 QLF (Ref. AMM Chapter 06- 00-00) 9. Re-install the carpet. 10. Restore the aircraft to flyable condition.

Part B 11. Apply Service Bulletin 80-0291 or, as an al ternative, perform the following steps:

a. Remove the electrical power (Ref. AMM Chapter 24-00-00). b. Remove the carpet from the aisle in the passenger compartment: the carpet is installed on the aircraft with Velcro, remove it by hand.

c. Remove the aisle floor panels 231 AL F, 231 FLF, 231 MLF, 231 QLF (Ref. AMM Chapter 06-00-00). d. Add 6.3 mm draining holes as per attached figure 2 (Additional drain holes on keel beam webs) connecting the late ral bays to th e center ones.

e. Clean the fuselage belly, removing debr is. A vacuum cleaner may be usedPIAGGIO AERO INDUSTRIES S.p.A. Via Cibrario, 4 – 16154 Genoa, Italy Product Support Department

Original Issue: April 21, 2011 Service Bulletin: 80-0330
Rev. N. 0 Date: Page: 6 of 9 f. Install the aisle floor pa nels 231 ALF, 231 FLF, 231 MLF, 231 QLF (Ref. AMM Chapter 06-00-00) g. Re-install the carpet 12. Restore the aircraft to flyable condition. 13. Complete the attached Confirmation Slip and se nd it back to Piaggio Aero Industries S.p.A. – Product Support Department 14. Make an appropriate entry in the airplane lo gbook to show compliance with this Service BulletinPIAGGIO AERO INDUSTRIES S.p.A. Via Cibrario, 4 – 16154 Genoa, Italy Product Support Department

Original Issue: April 21, 2011 Service Bulletin: 80-0330
Rev. N. 0 Date: Page: 7 of 9 Fig 2 - Additional drain holes on keel beam webs NOTE: additional 14 drain holes per side are requested

Typical section A-A Applicable to frames

- From #20 to #31

- From #32 to #35 FR31 FR32 FR33 FR34 FR35 FR36 FR37PIAGGIO AERO INDUSTRIES S.p.A. Via Cibrario, 4 – 16154 Genoa, Italy Product Support Department

Original Issue: April 21, 2011 Service Bulletin: 80-0330
Rev. N. 0 Date: Page: 8 of 9 Figure 3PIAGGIO AERO INDUSTRIES S.p.A. Via Cibrario, 4 – 16154 Genoa, Italy Product Support Department

Original Issue: April 21, 2011 Service Bulletin: 80-0330
Rev. N. 0 Date: Page: 9 of 9 3. MATERIAL INFORMATION

A. LIST OF MODIFICATION KIT COMPONENTS N/A.

B. LIST OF MATERIALS – OPERATOR SUPPLIED N/A.

C. LIST OF TOOLS N/A.

D. DISPOSAL OF REMOVED PART N/A.

4. WARNING - PROPRIETARY RIGHTS This bulletin contains proprie tary information of Piaggio Aero Industries S.p.A. (PAI), which PAI provides in confidence and solely for the purposes of s upporting PAI products and providing applicable information regardin g the proper use, maintenance, inspection, repair, servicing and parts application of PAI products. Neither this bulletin nor any information in it may be disclosed to othe rs, or used for any ot her purpose, including, without limitation, to design, crea te, develop, reproduce, manuf acture or derive any design, part, product, material, process, modification, configuration cha nge or repair, or obtain any government approval to do so. This material is the exclusive property of Piaggio Aero Industries S.p.A. and therefore shal l not be reproduced, used or disclosed to others except as authorized by contract with Piaggio Aero I ndustries S.p.A. or without the written permission of Piaggio Aero Industries S.p.A..PIAGGIO AERO INDUSTRIES S.p.A. Via Cibrario, 4 – 16154 Genoa, Italy Product Support Department

CONFIRMATION SLIP
Service Bulletin Accomplishment SB-80-0330 Rev.0
A/C S/N: A/C Flight H ours: A/C Registration:

Step 6 – flapper valves inspection Specify if any, and which flap per valve was found clogged or stuck, and if any, and which rubber flap was cut off.

Step 7 – drain test Specify if any, and which flapper valve has not a steady stream of water

Step 11 – added drain holes Specify is SB-80-0291 was embo died or if alternative method was followed.

Date: Accomplished by:

Signature