Commonwealth legislation

AD/BELL 214/4 - Tail Rotor Yoke

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

6/10 complexity

This Airworthiness Directive requires operators of Bell 214B and 214B‑1 helicopters (serial numbers 28001 onward) to check tail rotor yoke histories, apply a temporary 130 KIAS Vne marking and placards, update the flight manual, and replace or X‑ray‑inspect suspect yoke assemblies. Owners and operators must pay for inspections, markings and any replacement parts or testing. CASA issued the AD to address possible bending loads on the yoke that could create an unsafe condition.

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AIRWORTHINESS DIRECTIVE

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AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

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Bell Helicopter Textron 214 Series Helicopters

AD/BELL 214/4 Tail Rotor Yoke 2/2003 DM

Applicability: Model 214B and 214B-1 helicopters, serial numbers 28001 and subsequent. Requirement: 1. Review the historical records of the tail rotor yoke assembly (yoke assembly),

part number 214-011-802-105 or 214-011-802-111, for any recorded static or dynamic incidents that could have imposed a bending load on the yoke, but did not require replacing the yoke assembly; for example, an incident in which a damaged tail rotor blade was replaced due to a blade strike. If such a history exists, replace the yoke assembly with a serviceable yoke assembly.

2. Unless Requirement 3 has already been accomplished, accomplish the following:

Install a Never Exceed Velocity (Vne) red line at 130 knots indicated airspeed (KIAS) on the pilot and co-pilot airspeed indicators using red tape or paint, and a slippage indicator on the instrument case and glass.

b. Install a placard made of material that is not easily erased, disfigured, or obscured on the instrument panel in clear view of the pilot and co-pilot with the following words:

“Observe temporary Maximum Never Exceed (Vne) airspeed red line (marked at 130 knots indicated airspeed (KIAS). Vne is the greater of 10 KIAS less than the value presented on the airspeed limits placard or 68 KIAS for each ambient condition”.

c. Insert the applicable Bell 214B or 214B-1 Temporary Revision for Airspeed Restriction, dated 16 August 1996, which is attached to Bell Alert Service Bulletin (ASB) No. 214-96-57 dated 26 August 1996, into the Limitations section of the applicable Model 214B or 214B-1 Rotorcraft Flight Manual (RFM).

3. Accomplish the following:

Remove the yoke assembly part number 214-011-802-105 or 214-011-802- 111, and replace it with a serviceable yoke assembly with zero hours time in service, or a serviceable yoke assembly (regardless of time in service) that has passed a one-time x-ray diffraction inspection in accordance with ASB 214-96-57.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE

AIRWORTHINESS DIRECTIVE

Bell Helicopter Textron 214 Series Helicopters

AD/BELL 214/4 Tail Rotor Yoke 2/2003 DM AD/BELL 214/4 Tail Rotor Yoke 2/2003 DM

AD/BELL 214/4 Tail Rotor Yoke 2/2003 DM

Applicability: Model 214B and 214B-1 helicopters, serial numbers 28001 and subsequent. Requirement: 1. Review the historical records of the tail rotor yoke assembly (yoke assembly),

2. Unless Requirement 3 has already been accomplished, accomplish the following:

Install a Never Exceed Velocity (Vne) red line at 130 knots indicated airspeed (KIAS) on the pilot and co-pilot airspeed indicators using red tape or paint, and a slippage indicator on the instrument case and glass.

b. Install a placard made of material that is not easily erased, disfigured, or obscured on the instrument panel in clear view of the pilot and co-pilot with the following words:

c. Insert the applicable Bell 214B or 214B-1 Temporary Revision for Airspeed Restriction, dated 16 August 1996, which is attached to Bell Alert Service Bulletin (ASB) No. 214-96-57 dated 26 August 1996, into the Limitations section of the applicable Model 214B or 214B-1 Rotorcraft Flight Manual (RFM).

3. Accomplish the following:

Remove the yoke assembly part number 214-011-802-105 or 214-011-802- 111, and replace it with a serviceable yoke assembly with zero hours time in service, or a serviceable yoke assembly (regardless of time in service) that has passed a one-time x-ray diffraction inspection in accordance with ASB 214-96-57.