# ALERT Via GiovanniAgusta, 520

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# IC..T.. 2 1 017CascinaCostadiSama rate(VA) Italy

**~** "" T el. : +39 0331-229 1 11 - Fax: +39 033 1-229605/222595

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# ~ T RANSLATION OF N° 

# 1095-18 BOLLETTINO TECNICO The technical content of this document is approved under the authority of DOA nr EASA.21J.005. DATE November 29 , 2007

Compliance with this bollettino is: 

# MANDATORY REV.

SUBJECT: EMERGENCY RELEASE OF THE PILOTS DOORS. REASON: Perform a check of the emergency release of the pilots doors and the rework on the helicopter structure , of the housing slots of the doors lower hinges . HELICOPTERS AFFECTED: PART I" and PART II" : All the Agusta A 109S helicopters up to S/N 22054 included, excluding S/N 22048 and S/N 22053 . COMPLIANCE: PART 

### 1" : Within 5 (five) flight hours from the receipt of this Bollettino and however within and not later than December 31, 2007 . PART II" : Within and not later than June 30 , 2008. DESCRIPTION: During a check of the pilot and co-pilot doors emergency release, the non-disengagement of the lower hinges from the structure has been reported on an A 109 series helicopter. The investigations determined that the reason of this malfunction is due to the interference of the lower hinges with the structure . The interference, even if the pivot on which the door is hinged was correctly disengaged , did not permit the door release . This Bollettino is issued in order to perform a check of the emergency release of the pilots doors (PART I") and a rework of the housing slots of the doors lower hinges (PART 

### II") .

An appropria te entry should be mode m the aircraft log book upon occomplishmenl If ownership of a·rcrofl has changed, please, forward Ia new owner. 

# ALERT Page 1 of 5B.T. 109S-18 REQUIRED MANPOWER: The following estimated manpower hours are required for compliance with this Bollettino : PART 

### 1" : Y:z (half) hour per door PARTII": 1 (one) hour per door WARRANTY: N.A. REQUIRED MATERIALS: PART 

### 1": N.A. PART II": The following consumable material is required for compliance with PART II" of this Bollettino: SPECIFICATION TT-N-95 Type2 DENOMINATION Aliphatic Naphtha (cod. 531 055030) Q .TY A.R. SPECIAL TOOLS: N .A. WEIGHT AND BALANCE CHANGES: PART 

### 1" : N.A. PART II": Negligible. REFERENCES: A 109S Air Vehicle Maintenance Publication . PUBLICATIONS AFFECTED: N .A. COMPLIANCE INSTRUCTIONS:

Page 2 of 5 PART 

### 1" : (See figure 1) 1. Prepare the helicopter on ground for a safe maintenance, disconnect any power supply. 2 . Open the pilot door and remove the strut in accordance with the instructions provided in the A 109S Air Vehicle Maintenance Publication. Close the door. . ,CAUTION The following operation must be performed by two personnel , one inside the helicopter to operate the release mechanism and one outside to sustain the door in order to avoid possible damage. B.T. 1098-18

3. Operate only the pilot door emergercy release handle, and verify that the door is free to disengage itself from the helicopter structure without any interference (see figure 1). CAUTION In case interferences are found between the lower hinge and the relevant housing on the helicopter structure, immediately comply with the PART II" of this Bollettino. 4 . On the helicopter reinstall the pilot door and the relevant strut in accordance with the instructions provided in the A109S Air Vehicle Maintenance Publication. 5. Repeat the operations of the steps 2+4 for the co-pilot door. 6. Return the helicopter in ready to flight condition. 7. Record compliance with this part of the Bollettino in the helicopter log book. PART II" : (See figures 1 and 2) 1 . Prepare the helicopter on ground for a safe maintenance , disconnect any power supply. 2 . Remove the pilot door in accordance with the instructions provided in the A 109S Air Vehicle Maintenance Publication . 3 . In accordance with the fi gu re 2 check the dimension of the housing slot of the door lowe r hi nge . 4 . In case the noted dimensions are the same or greater than the required ones given in figure 2 , apply the step 10. and subsequent. In case the noted dimensions are below than the required ones given in figure 2 , apply the step 5. and subsequent. Page 3 of5B.T. 109S-18

Page 4 of 5 5 . Using a file or a mill, on the helicopter structure rework the housing slot of the door lower hinge, in accordance with the dimensions shown in figure 2. NOTE 

## -- Keep a minimum radium of 2 mm at the corners and remove any burrs and/or sharp edges . 6. Clean both the hinges of the door and their housings on the structure , for possible presence of sealant clots , using Aliphatic Naphtha or equivalent and, if necessary, a non metallic spatula . 7 . Restore the protection treatment and the painting in accordance with the pertinent painting scheme . 8. On the helicopter reinstall the door in accordance with the instructions provided in the A 109S Air Vehicle Maintenance Publication, and close it without the relevant strut. CAUTION The following operation must be performed by two persons , one inside the helicopter to operate the release mechanism and one outside to sustain the door in order to avoid possible damage. 9. Operate only the emergency release handle , and verify that the door is free to disengage itself from the helicopter structure without any interference (see figure 1). 10. On the helicopter reinstall the pilot door and the re levant strut in accordance with the instructions provided in the A 109S Air Vehicle Maintenance Publication . 11 . Repeat the operations of the steps 2+1 0 for the co-pilot door. 12 . Return the helicopter in ready to flight condition. 13 . Record compliance with this part of the Bollettino in the helicopter log boo k.

# FIGURE 1

Perimeter to

Hinge axis

Dimension 

## A: From hinge axis to the end of housing slot. Dimension 

### 8: With respect to hinge centerline . 

# FIGU RE 2 B.T. 109S- 18

11 .5 - 12 .0 mm 

### B

Page 5 of5ANAG USTA WESTLAND C OMPANY 

### =::fJ:j= Prego spedire a questo indirizzo: Data : Please send to the following address: MODULO APPLICAZIONE BOLLETTINO TECNICO Date: TECHNICAL BULLETIN COMPLIANCE FORM 

### AGUSTA S.p.A. Numero : CUSTOMER SUPPORT Number : V ia per Tornavento , 15 21019 Somma Lombardo (VA)- ITALY Tel. : +390331711100 Revisione: Fax: +39 0331 711397 Rev i sion: Denominazione Cliente ed lndirizzo: Telefono: Customer Name andAddress: Telephone: Fax: Data Appl icazione B.T .: B.T. Compliance Date: Modello Elicottero S/N Matricola Ore Totali Ore D.U. R.

Helicopter Model Tail Number Total 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 tulle le sue parti e spedi rlo 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.