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Fri, Nov 04, 2005

Urgent CASA AD: Bell

Emergency Floatation Reservoir Adapter 13/2005
Applicability:
Bell Helicopter Textron Model 212, helicopters modified with Aeronautical
Accessories, Inc. (AAI), Supplemental Type Certificate (STC) SH2820SO; or with
AAI Parts Manufacturer Approval (PMA) reservoir assembly, part number (P/N)
212-372-050; or with adapter, P/N 212-371-002, installed.

Requirement: 1. Vent the nitrogen from the reservoir assembly by following the Accomplishment
Instructions, Part II - Floatation System Discharging, of AAI Alert Service
Bulletin (ASB) No. AA-05005, Revision A dated 27 June 27 2005 or later FAA
Approved revision.

2. Remove the valve assembly and air line from the adapter, and inspect the counter
bore depth (dimension D) as shown in Figure 1 of the ASB.
(a) If dimension D, as depicted in Figure 1 of the ASB, does not exceed .860
inch, recharge the floatation system by following the Accomplishment
Instructions, Part III - Floatation System Charging, and referring to Figures 2
and 3 of the ASB.
(b) If dimension D, as depicted in Figure 1 of the ASB, exceeds .860 inch,
replace the reservoir assembly and the adapter with serviceable parts.

3. Discharging and recharging the floatation system and inspecting the counter bore
depth dimension of the adapter shall be done in accordance with the specified
portions of the ASB.
Note: FAA AD 2005-20-38 Amendment 39-14335 refers.

Compliance: 1. Within the next 24 hours time-in-service (TIS) or before the next emergency floatation supply bottle nitrogen charging after the effective date of this AD.
2. Within the next 24 hours time-in-service (TIS) or before the next emergency
floatation supply bottle nitrogen charging after the effective date of this AD.
2. (b) Before further flight after the effective date of this AD.
3. From the effective date of this AD.

This Airworthiness Directive becomes effective on 9 November 2005.

Background: The actions detailed in this AD are intended to prevent rupture of an adapter, uncontrolled jetting of pressurized gas from the nitrogen bottle, and subsequent injury to occupants or damage to the helicopter.

FMI: www.casa.gov.au

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