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Airworthiness directives › 2014-12-01

AD 2014-12-01 Airworthiness Directives; Bell Helicopter Textron, Inc. (Bell) Helicopters

2014-07-14
2014-06-09
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Airframe
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Applicability*9

This AD supersedes AD 2013-11-05, Amendment 39-17465 (78 FR 33204, June 4, 2013).

Compliance

(1) Within 10 hours time in service (TIS): (i) Inspect each bearing to determine whether the seal material is correct, as described in the Accomplishment Instructions, Part 1—Inspection, paragraphs 1.a. through 2. and Figure 1 of Bell Alert Service Bulletin (ASB) No. 214-13-74, Revision A, dated March 25, 2013, for Model 214B and 214B-1 helicopters and ASB No. 214ST-13-90, Revision A, dated March 25, 2013, for Model 214ST helicopters. (ii) For each bearing with black seal material, before further flight and thereafter at intervals not to exceed 10 hours TIS, inspect the bearing for leakage, slung grease, or damage. If there is any leakage, slung grease, or damage, before further flight, replace the bearing with an airworthy bearing with red/orange to brown color seal material. (2) Within 500 hours TIS or 6 months, whichever occurs earlier, replace any bearing with black seal material with an airworthy bearing with red/orange to brown color seal material. (3) Do not install bearing P/N 214-040-606-005 or 214-040-606-101 with black seal material on any helicopter.

Required actions

Special flight permits are prohibited.

Unsafe condition

You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.

Affected ADs

This AD defines the unsafe condition as a bearing with incorrect seal material, which could fail under extreme temperature or environmental conditions, resulting in loss of tail rotor control and subsequent loss of control of the helicopter.

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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1