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 inspections, modifications or technical directives and 

related time compliance by means of relevant Airworthiness Directives. 

SERVICE BULLETIN (MANDATORY) N.: 80-0330 REV.0 ATA CHAPTER: 53-00 

MODIFICATION N.: N/A 

TITLE: FUSELAGE DRAIN HOLES FRAME 36 – REWORK 

REVISION STATUS OF THE BULLETIN 

This Service Bulletin is at the original 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 occurrence of blockage of flight 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 accumulation 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 the 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 the fuselage drain holes. 

Part B

- Drilling of additional drain holes 

- Communication to Piaggio Aero Industries 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 tolerance 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 Industries 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 may be accomplished in approximately: 

Part A: 4 man-hours. 

Part B: If alternative procedure is used: 5 man hours. 

 If SB-80-0291 is embodied during a “C” or “D” check, 40 man hours 
 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: 3 of 9

H. TECHNICAL INFORMATION 

For questions concerning the technical content 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/A 
 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: 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 passenger compartment: the carpet 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 valves (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 debris. A vacuum cleaner may be used 
 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: 5 of 9

6. Inspect the four (4) flapper valves (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 note 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 repositioning – the rubber flap is still laying against 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 / approximately 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. Take 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 concurrently 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 alternative, 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 ALF, 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 lateral bays to the center ones. 

e. Clean the fuselage belly, removing debris. A vacuum cleaner may be used 
 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: 6 of 9

f. Install the aisle floor panels 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 send it back to Piaggio Aero Industries S.p.A. – 

Product Support Department 

14. Make an appropriate entry in the airplane logbook to show compliance with this Service 

Bulletin
 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: 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 FR37 
 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: 8 of 9

Figure 3 
 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: 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 proprietary information of Piaggio Aero Industries S.p.A. (PAI), 

which PAI provides in confidence and solely for the purposes of supporting PAI products 

and providing applicable information regarding 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 others, or used for any other purpose, including, 

without limitation, to design, create, develop, reproduce, manufacture or derive any design, 

part, product, material, process, modification, configuration change 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 shall not be reproduced, used or disclosed to others except as 

authorized by contract with Piaggio Aero Industries 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 Hours: A/C Registration: 

Step 6 – flapper valves inspection Specify if any, and which flapper 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 embodied or if alternative 

method was followed. 

Date: Accomplished by: 

Signature