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ALERT Via Giovanni Agusta, 520 AGUSTA 21017 Cascina Costa di Samarate (VA) Italy Tel.: +39 0331-229111 - Fax: +39 0331-229605/222595
AN AGUSTAWESTLAND COMPANY TRANSLATION OF N 109EP-83
BOLLETTINO TECNICO The technical content of this document is approved DATE November 29, 2007 under the authority of DOA nr EASA.21J.005.
REV.
Compliance with this bollettino is: MANDATORY 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 |^ and PART I|^:
All the Agusta A109E helicopters up to S/N 11714 included, excluding S/N 11712 and S/N 11713.
COMPLIANCE:
PART I^:
Within 5 (five) flight hours from the receipt of this Bollettino and however within and not later than December 31, 2007.
PART I^:
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 A109 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 appropriate entry should be made in the aircraft log book upon accomplishment If ownership of aircratt has changed, please, forward to new owner.
ALERT Page 1 of 5
B.T. 109EP-83 REQUIRED MANPOWER:
The following estimated manpower hours are required for compliance with this Bollettino:
PART I^: ½ (half) hour per door PARTI^: 1 (one) hour per door WARRANTY:
N.A.
REQUIRED MATERIALS:
PARTI:
N.A.
PART I^ The following consumable material is required for compliance with PART I|^ of this Bollettino:
SPECIFICATION DENOMINATION Q.TY TT-N-95 Aliphatic Naphtha A.R Type 2 (cod. 531055030) SPECIAL TOOLS:
N.A.
WEIGHT AND BALANCE CHANGES:
PARTI:
N.A.
PART I!^:
Negligible.
REFERENCES:
A109E Maintenance Manual.
PUBLICATIONS AFFECTED:
N.A.
COMPLIANCE INSTRUCTIONS:
PARTI:
(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 A109E Maintenance Manual. Close the door.
Page 2 of 5
B.T. 109EP-83
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.
Operate only the pilot door emergency release handle, and verify that the door is free to disengage itself from the helicopter structure without any interference (see figure 1).
CAUTION case interferences are found between the lower hinge and the relevant housing on the helicopter structure, immediately comply with the PART I|^ of this Bollettino.
4. On the helicopter reinstall the pilot door and the relevant strut in accordance with the instructions provided in the A109E Maintenance Manual.
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 I|^:
(See figures 1 and 2) 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 A109E Maintenance Manual.
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 of 5
B.T. 109EP-83
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.
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 A109E Maintenance Manual, 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).
On the helicopter reinstall the pilot door and the relevant strut in accordance with the instructions provided in the A109E Maintenance Manual.
11. Repeat the operations of the steps 2÷10 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.
Page 4 of 5
B.T. 109EP-83 Area of possible interference between the door hinge and the housing slot on the structure.
FWD FIGURE 1 Hinge axis of Perimeter to emergency be reworked release 11.5 - 12.0 mm B Hinge axis
33.5 - 34.0 mm FWD A Dimension A: From hinge axis to the end of housing slot.
Dimension B: With respect to hinge centerline.
FIGURE 2 Page 5 of 5
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AGUSTA
AN AGUSTAWESTLAND COMPANY 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.: +39 0331 711100 Revisione:
Fax: +39 0331 711397 Revision:
Denominazione Cliente ed Indirizzo: Telefono:
Customer Name and Address: Telephone:
Fax:
Data Applicazione B.T.:
B.T. Compliance Date Modello Elicottero Helicopter Model S/N Tail Number Matricola Total Hours Ore Totali Ore D.U.R. T.S.O.
Note:
Remarks:
Informazioni:
Information:
Al fine di gestire le varianti alla 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 la 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.
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