Airworthiness directives › 2021-03-13
AD 2021-03-13 Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters
Models named: 429. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Bell Textron Canada Limited (type certificate previously held by Bell Helicopter Textron Canada Limited) Model 429 helicopters, certificated in any category, serial numbers 57001 through 57351 inclusive.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For each CFB having part number 429-310-003-103 (the affected CFB): Within 50 hours time-in-service, determine the accumulated retirement index number (RIN). For purposes of this AD, count 1 RIN each time one or both engines are started. If any affected CFB has accumulated 8,000 or more total RIN, before further flight, remove the affected CFB from service. If any affected CFB has accumulated less than 8,000 total RIN, create a component history card or equivalent record indicating a life limit of 8,000 total RIN. Thereafter, continue to count RIN and record the life limit of the affected CFB on its component history card or equivalent record and remove the affected CFB from service before accumulating 8,000 total RIN.
Unsafe condition
This AD was prompted by the introduction of a new life limit for the centrifugal force bearing (CFB). The FAA is issuing this AD to address a CFB remaining in service beyond its fatigue life. Failure to observe the CFB life limit could result in excessive vibration and loss of control of the helicopter.
Affected ADs
None.
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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