# ALERT Via GiovanniAgusta , 520 21017 Casci na Costa di Samarate (VA) Ita l y T el. : +39 0331-22911 1 - Fax: +39 0331 -229605/222595 

# AGlS"

---- -- -----------------AN AGUSTAW E S T LAN D COMPANY



# ~ TRANSLATION OF 

### w 

# 109EP-85 BOLLETTINO TECNICO The technica l content of this document is approved under the authority of DOA nr EASA.21J .005 . DATE December 13 , 2007 Compliance with this bollettino is : 

# MANDATORY REV.

SUBJECT: INSPECTION OF THE TIP CAP P/N 709 -0103-29-109 OF THE MAIN ROTOR BLADES P/N 709-0103-01 (ALL DASH NUMBERS) . REASON: To inspect the subject tip cap for presen ce of cracks on the leading edge . HELICOPTERS AFFECTED: All the main rotor blades P/N 709-0103-01 i nstalled on the Agusta A 109E helicopters (and/or stored as spare parts) equipped with tip cap P/N 709-0103-29-1 09 .

COMPLIANCE: NOTE Main Rotor blades P/N 709-0103-01 that are not affected by the BT 109EP-1 Rev . B , must comply with this Bollettino .

**~** Tip Caps PIN 709-0103-29-109 that have accumulated more than 600 ( six hundred ) flight hours: • Within 5 (five) flight hours from th e receipt of this Bollettino and however within and not later than Ja n uary 31 ,2008. Subsequently every 50 ( fifty ) flig ht hours ( plus 5 flight hours tolerance not cumulative).

**~** Ti p Caps P/N 709 - 0103-29-1 09 th at have acc umulated less t ha n 600 ( six hundred ) fli gh t hou rs: • Within and not late r than 600 ( six hundred ) flight hours . Subsequently every 50 ( fifty ) flight hours ( plus 5 flight hours tolerance not cumulative) .

An o p proprio t e entry should be mode in the aircraft log book upon accomplis h me nt. If ownership of aircraf t has changed, please, forward to new owner. 

# ALERT Page 1 of 5B .T . 109EP-85 DESCRIPTION: A case of loss of a part of the tip P/N 709-0103-29- 109 of the main rotor blade P/N 709-010 3- 0 1 has been reported on an A 1 09E helicopter model , with subseque nt i ncrease of helicopter vibratory level. The cause of this loss is the fracture of the welded bead ( joint line of shells ) of the tip lead in g edge . Further investigation by AGUSTA are still ongoing. This Bollettino is issued with the purpose of providing, as a precautionary measure, a visual insp ection, with the aid of a magnifying glass, for cracks of the tip cap leadi ng edge ( welded joint line of shells ) REQUIRED MANPOWER: 0,5 estimated manpowe r hours are required for each blade (only visual inspection) for complian ce with this Bollettino . WARRANTY: If upon implementati on o f this Bolletino Tecnico the tip cap is found cracked on the leadin g edge, please contact immediately our Customer Support Engineering REQUIRED MATERIALS: The following consuma bl e materials will be required to accomplish this Bollettino: • abrasive paper grit No 320 or more fine • solvent (exane , or petroleum ether, or aliphatic naphtha according to TT-N -95 type 2) or solvent 9PR5 available from BRENT International; • visible dye penet ran t P6R available from BRENT International; • nonaqueous wet developer 901 B spray available from BRENT International ; • one or more whi te light sources able to provide an illuminance of at least 1000 lux on i nspection area . Alternative products to the solvents, penetrant and developer specified above are permitted provided that: • they comply to th e requirements of AMS2644 (class 2 for the solvent , type 2 and method "c" for the penetrant and form "e " for the

· developer) ; • they are listed in th e pertinent QPL-AMS -2644-1; • the pe netrant and develo per are produced by the same company. SPECIAL TOOLS: N .A. WEIGHT AND BALANCE CHANGES: N .A. REFERENCES : N .A. Pag e 2 of 5PUBLICATIONS AFFECTED: A 1 09E Maintenance planning Manual A 109E Maintenance Manual. COMPLIANCE INSTRUCTIONS: (See figure 1) NOTE The procedures repo rted below are applicable to each one of the four main rotor blades , if affected by this Bollettino , and does not require to remove it from the helicopter . B .T . 109EP-85

1 . Prepare the helicopter on grou nd for a safe maintenance , disconnect any power supply . 2. Using a 10 power magnifying glass , visually inspect on tip cap leading edge welded bead Uoint li ne between the two metallic shells) for presence of cracks and/o r damage (see figure 1) .

**~** If the main rotor blade does not have any presence of cracks on the tip cap , proceed to step 5 and subsequent.

**~** If the main rotor blade does have presence of cracks on the tip cap , remove it from service and i mmediately inform AGUST 

### A.

**~** If there are doubts on the presence of cracks , proceed with step 3 and subsequent. 3 . Using the visible dye penetrant met hod , inspect the tip cap leading edge along the welded joint line of the shells for presence of cracks as follows (refer to figure 1 ) : 3.1 . Using abrasive paper grit n o 320 or more fine , remove the paint from area B , on both upper and lower sides , i nboard 5 to 10 mm from leading edge and starting at 30 ,0 mm from the trailing edge . Mask su rrounding painted areas us in g adhesive tape . CA UTION 1 The above op e ration must be accomplished at the first application of the liquid penetrant inspection.

Page 3 of 5B .T . 109EP-85 CAUTION 2 Pers on nel conducting the liquid penetrant inspection must be qualified in accordance with the practice EN4 179 I NAS410 . The bl ade, the penetrant and ambient temp eratures shall be between 4

# oc and 45°C . 3.2. Thoroughly degrease inspection area using a cloth soaked in solvent (refer to paragraph RE QUIRED MATERIALS). Leave solvent to completely evaporate . 3.3. Using adhesive ta pe mask trailing edge inboard for 30,0 mm to avoid possible penetrant infiltration in the tip cap. 3.4 . Apply the penet rant in the inspection area extending approximately 5 m m inboard from trailing edge (refer to view A of figure 1 ), on both up per and lower sides . Penetrant dwell time shall be 30 to 40 minu tes . 3.5. Remove excess penetrant with a clear dry cloth followed by a cloth dampened in sol vent until the background color has been completely removed . NOTE Do not directly pour the solvent on the inspection area . 3.6 . Apply a thin and u niform layer of developer 9D 1B , after 10 to 15 minutes illuminate area to 1000 lux and examine it presence of cracks . 3 .7 . Upon completion of inspection , clean affected area with a clean dry cloth followed by a cloth dampened in solvent. 4 . If the main rotor b lade does not have any presence of cracks on the tip cap, proceed to step 5 and subsequent. If the main rotor blade does have presence of cracks on the tip cap, remove it from service and immediately inform AGUSTA 5. Return the helicopter in ready to flight condition . 6 . Record compliance with this Bollettino in the helicopter log book .

Page 4 of 5View A Lap plate

Tip cap

Inspection area on the leading edge

Tip cap shell welding PIN 709-0103 -29- 109 markin g B .T. 109EP-85

Inspection area on the leading edge

AREA B (upper and lower sides) paint to remove if the liquid penetrant inspection is required

Dimensions in millimeters 

# FIGURE 1 Page 5 of 5AA AGUSTAWESlt.ANO COMPANY 

## =tJi== P rego spedire a questo indirizzo : Data : Please send to the following address: MODULO APPLICAZIONE BOLLETTINO TECNICO Date: TECHNICAL BULLETIN COMPLIA NCE FORM 

### AGUSTA S.p.A. Numero: CUSTOMER SUPPORT Number : Via per Tornavento , 15 21019 Somma Lombardo (VA) - ITALY Tel.:+390331711100 Revisions : Fax : +39 0331 711397 Rev ision: Denominazione Cliente ed lndirizz o : Telefo no : Customer Nam e and Address: Telephone : Fax : Data Appl icazione B .T .: B. T . Compliance Date: Modello Elicottero S/ N Matricola Ore Total i Ore D . U . R .

Helicopter Model Tail Number Tot al Hours T.S. O.

Note : Remarks:

lnformazioni: Information : AI fine di gestire le varianti alia configurazione base , in relazione all'emissione del Bollettino Tecnico, preghiamo di voler compilare il presente modulo in tutte le sue parti e spedirlo all'indirizzo sopra indicato. Si ringrazia per Ia gentile collaborazione data. We request your cooperation in filling this form , in order to keep out statistical data relevant to aircraft configuration up-to-date . The form should be filled in all its parts and sent to the above address . We thank you beforehand for the information given .