Commonwealth legislation

AD/BELL 212/62 - Tail Rotor Counterweight Bellcrank Retention Nut

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive requires operators of Bell 212 helicopters to remove two existing tail-rotor counterweight bellcrank retention nuts, fit specified replacement nuts (MS14145L6 or MS17826-6), and inspect/reapply corrosion preventive compound; used nuts are prohibited. Initial compliance is within 100 flight hours or 90 days of 1 August 2001, with ongoing inspections every 100 hours. The AD responds to a reported in‑flight loss caused by retention‑nut failure that could allow loss of tail‑rotor control (Background).

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Current sections

Direct links to the current provisions in AD/BELL 212/62 - Tail Rotor Counterweight Bellcrank Retention Nut.

AD/BELL 212/62 - Tail Rotor Counterweight Bellcrank Retention Nut

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
View image in the official source
Bell Helicopter Textron 212 Series Helicopters

AIRWORTHINESS DIRECTIVE

View image in the official source

View image in the official source
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.

AD/BELL 212/62 Tail Rotor Counterweight Bellcrank Retention Nut

9/2001

Applicability: Model 212 helicopters.

Requirement: 1. Remove the two existing retention nuts retaining the bellcranks, part number 212- 010-709-001 or 212-011-705-001, and install retention nuts, part number MS14145L6 or MS17826-6, in accordance with paragraphs (1) through (5) of the Accomplishment Instructions in Bell Helicopter Textron Alert Service Bulletin (ASB) 212-00-107 Revision A, dated 13 September 2000. A used retention nut must not be installed.

Inspect the retention nuts and corrosion preventive compound (CPC) coating in accordance with paragraph (6) of the Accomplishment Instructions in ASB 212- 00-107 Revision A. Reapply the CPC coating if deficiencies are found in the coverage and protection of the area. Replace any retention nut found with any corrosion, mechanical damage, a crack, or looseness, with a serviceable nut before further flight.

Note: FAA AD 2001-13-01 Amdt 39-12281 refers.

Compliance: 1. Within 100 hours time in service or 90 days after 1 August 2001, whichever occurs first; unless already accomplished.

At intervals not to exceed 100 hours time in service after accomplishing Requirement 1.

This Airworthiness Directive becomes effective on 1 August 2001.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Background: The FAA received a report of an in-flight loss of a tail rotor counterweight bellcrank due to failure of the retention nut. Failure of the retention nut could result in the bellcrank migrating off the crosshead spindle, loss of tail rotor control, and subsequent loss of control of the helicopter.

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David Alan Villiers

Delegate of the Civil Aviation Safety Authority 25 July 2001

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The above AD is notified in the Commonwealth of Australia Gazette on 1 August 2001.

Source text

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

1 AD/BELL 212/62 - Tail Rotor Counterweight Bellcrank Retention Nut

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Bell Helicopter Textron 212 Series Helicopters

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.

AD/BELL 212/62 Tail Rotor Counterweight Bellcrank Retention Nut

9/2001

Applicability: Model 212 helicopters.

Inspect the retention nuts and corrosion preventive compound (CPC) coating in accordance with paragraph (6) of the Accomplishment Instructions in ASB 212- 00-107 Revision A. Reapply the CPC coating if deficiencies are found in the coverage and protection of the area. Replace any retention nut found with any corrosion, mechanical damage, a crack, or looseness, with a serviceable nut before further flight.

Note: FAA AD 2001-13-01 Amdt 39-12281 refers.

Compliance: 1. Within 100 hours time in service or 90 days after 1 August 2001, whichever occurs first; unless already accomplished.

At intervals not to exceed 100 hours time in service after accomplishing Requirement 1.

This Airworthiness Directive becomes effective on 1 August 2001.

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES