ALERT Via GiovanniAgusta, 520 

~ 

~~ IC..T.. 21017CascinaCostadiSamarate(VA) Italy 

"" Tel. : +39 0331-229 111 - Fax: +39 0331-229605/222595 

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~ 

U S TAWESTLAN D COMPANY 

TRANSLATION 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 1 09S 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 5 
B.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 1 09S 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 1 09S 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 A 1 09S 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 1 09S Air Vehicle Maintenance Publication . 

3. In accordance with the figure 2 check the dimension of the 

housing slot of the door lower hinge. 

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 of5 
B.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 1 09S 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 ). 

1 0. On the helicopter reinstall the pilot door and the relevant strut in 

accordance with the instructions provided in the A 1 09S 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 book. 
FIGURE 1 

Perimeter to 

Hinge axis 

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

Dimension 8: With respect to hinge centerline. 

FIGURE 2 

B.T. 109S-18 

11 .5 - 12.0 mm 

B 

Page 5 of5 

AN AG USTA WESTLAND C OMPANY 

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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: 

Via per Tornavento , 15 

21019 Somma Lombardo (VA)- ITALY 

Tel. : +390331711100 Revisione: 

Fax: +39 0331 711397 Revision: 

Denominazione Cliente ed lndirizzo: Telefono: 

Customer Name and Address: 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 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.