Commonwealth legislation

AD/AL 250/64 Amdt 4 Internal Energy Absorbing Ring

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This AD requires operators of Rolls Royce (Allison) 250‑C30 series turbine engines to fit an internal energy‑absorbing ring in accordance with Rolls Royce (Allison) Alert Service Bulletin CEB‑A‑72‑3128 R1 (para 2), within 30 days of the AD’s commencement (8 October 2021). Operators pay for and schedule the modification; the regulator enforces compliance. The amendment expands mandatory fitment across all 250‑C30 variants and removes prior references to external containment shields and other alternative configurations.

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Current sections

Direct links to the current provisions in AD/AL 250/64 Amdt 4 Internal Energy Absorbing Ring.

Rolls Royce (Allison) Turbine Engines -

Rolls Royce (Allison) Turbine Engines - 250 Series

AD/AL 250/64 Amdt 4	Internal Energy Absorbing Ring	20/2021

Applicability:	Rolls Royce (Allison) model 250-C30, 250-C30L, 250-C30M, 250-C30P, and 250‑C30S engines.
Requirement:	Install an internal energy absorbing ring in accordance with Rolls Royce (Allison) Alert Service Bulletin (ASB) CEB-A-72-3128 R1, Para 2 Accomplishment Instructions, as in force on the date of commencement of this AD.Note 1: This AD may be carried out in conjunction with AD/AL 250/66 Amdt 3.Note 2: United States of America Federal Aviation Administration (FAA) AD 86‑19‑12 is the basis for this AD.
Compliance:	Unless previously accomplished within 30 days after the commencement date of this AD.
	This AD commences on 8 October 2021.
Background:	Amendment 3 of this AD was amended to rationalize previous requirements, and to increase the engine models and aircraft applicable. The Requirements now require the subject internal energy absorbing ring to be installed in all 250-C30 series engines. Previous references to airframe mounted, external containment shields and the Allison Assured Engine configuration were deleted.This amendment removes reference to Civil Aviation Order (CAO) 106.

Signature of Delegate

David Punshon
Delegate of the Civil Aviation Safety Authority

29 September 2021

AD/AL 250/64 Amdt 4

Internal Energy Absorbing Ring

20/2021

Source text

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

Rolls Royce (Allison) Turbine Engines - Rolls Royce (Allison) Turbine Engines - 250 Series

Rolls Royce (Allison) Turbine Engines - 250 Series

AD/AL 250/64 Amdt 4	Internal Energy Absorbing Ring	20/2021

Applicability:	Rolls Royce (Allison) model 250-C30, 250-C30L, 250-C30M, 250-C30P, and 250‑C30S engines.
Requirement:	Install an internal energy absorbing ring in accordance with Rolls Royce (Allison) Alert Service Bulletin (ASB) CEB-A-72-3128 R1, Para 2 Accomplishment Instructions, as in force on the date of commencement of this AD.Note 1: This AD may be carried out in conjunction with AD/AL 250/66 Amdt 3.Note 2: United States of America Federal Aviation Administration (FAA) AD 86‑19‑12 is the basis for this AD.
Compliance:	Unless previously accomplished within 30 days after the commencement date of this AD.
	This AD commences on 8 October 2021.
Background:	Amendment 3 of this AD was amended to rationalize previous requirements, and to increase the engine models and aircraft applicable. The Requirements now require the subject internal energy absorbing ring to be installed in all 250-C30 series engines. Previous references to airframe mounted, external containment shields and the Allison Assured Engine configuration were deleted.This amendment removes reference to Civil Aviation Order (CAO) 106.

AD/AL 250/64 Amdt 4 Internal Energy Absorbing Ring

Plain English Summary

Deep dive

Current sections

Rolls Royce (Allison) Turbine Engines - 250 Series

Rolls Royce (Allison) Turbine Engines - 250 Series

AD/AL 250/64 Amdt 4

AD/AL 250/64 Amdt 4

Internal Energy Absorbing Ring

Internal Energy Absorbing Ring

20/2021

20/2021

Source text

Rolls Royce (Allison) Turbine Engines - Rolls Royce (Allison) Turbine Engines - 250 Series

Rolls Royce (Allison) Turbine Engines - 250 Series

AD/AL 250/64 Amdt 4 AD/AL 250/64 Amdt 4

AD/AL 250/64 Amdt 4

Internal Energy Absorbing Ring Internal Energy Absorbing Ring

Internal Energy Absorbing Ring

20/2021 20/2021

20/2021