COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Rolls Royce Turbine Engines - RB211 Series
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/RB211/21 Amdt 1 and issues the following 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/RB211/21
Amdt 2
Radial Drive Steady Bearing 7/2001
Applicability: RB211-535C-37, -535E4-37, -535E4-B-37 and -535E4-B-75 series engines not incorporating Rolls Royce Service Bulletin (SB) RB.211-72-C925 Revision 2.
Requirement: 1. Aircraft configuration: To ensure no aircraft is fitted with both engines incorporating pre SB 72-C925 bearings with a bearing time in service of concern, compliance is required with Rolls Royce SB RB.211-72-D176.
2. Oil filter inspection: To detect evidence of radial drive steady bearing failure, inspect the oil scavenge filter for evidence of bronze and/or bearing steel debris in accordance with Rolls Royce Service Bulletin RB.211-72-C815 Revision 3.
3. Bearing replacement: Remove from service any radial drive steady bearing, P/N LK76084, IPC 72-62-01 Fig/Item 01 260, identified with prefixes DLJO, DLJP, DLOQ, DLSK or DMBA in accordance with the procedures in Rolls Royce Service Bulletin RB.211-72-C930.
Note: UK CAA ADs’ 004-12-99, 004-09-2000 and FAA AD 2000-09-14 refer.
Compliance: 1. Within 100 hours time in service from the effective date of this Directive.
2. From the effective date of this Directive.
3. From the effective date of this Directive.
This Amendment becomes effective on 12 July 2001.
Background: This Directive was originally issued to require a visual inspection of the oil scavenge filter for evidence of radial drive steady bearing debris indicating bearing failure may be imminent. This amendment provides a terminating action by limiting engines applicable to those incorporating a pre mod. 72-C925 bearing. This amendment also adds a requirement to ensure no aircraft is fitted with both engines incorporating pre SB 72-C925 bearings with a bearing time in service of concern.
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
The original issue of this Airworthiness Directive became effective on 7 October 1999.
Amendment 1 of this Airworthiness Directive became effective on 10 August 2000.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority 28 May 2001
The above AD is notified in the Commonwealth of Australia Gazette on 13 June 2001.
Overview
The Civil Aviation Regulations 1998, administered by the Civil Aviation Safety Authority (CASA), contain provisions for issuing Airworthiness Directives (ADs) to address safety concerns in aviation. One such AD, AD/RB211/21, was introduced to address the issue of radial drive steady bearings in Rolls Royce RB211 series turbine engines. Initially issued on 7 October 1999, the AD was amended on 10 August 2000 and further revised on 12 July 2001. The objective of these directives is to ensure aircraft safety by mandating specific maintenance actions to prevent potential bearing failures and ensure compliance with relevant service bulletins. This amendment focuses on limiting the applicability to engines incorporating a pre-modification 72-C925 bearing and ensuring that no aircraft is fitted with both engines incorporating bearings with a concerning time in service.
Scope and Application
This Civil Aviation Regulation, specifically Part 39 - 106, applies to Rolls Royce RB211 series turbine engines, namely the RB211-535C-37, -535E4-37, -535E4-B-37 and -535E4-B-75 series engines that have not incorporated Rolls Royce Service Bulletin RB.211-72-C925 Revision 2. The regulation is issued under the authority of the Civil Aviation Safety Authority (CASA) and applies on a national level across the Commonwealth of Australia. The AD aims to ensure the continued airworthiness of these engines by requiring specific actions to be taken to address identified safety concerns. The actions include ensuring no aircraft is fitted with both engines incorporating pre SB 72-C925 bearings with a bearing time in service of concern, inspecting the oil scavenge filter for evidence of radial drive steady bearing failure, and replacing certain radial drive steady bearings. The compliance timeframe for these actions is within 100 hours time in service from the effective date of this Directive, with some actions required from the effective date itself. The regulation does not explicitly mention exclusions or exemptions, but the applicability section indicates that it only applies to certain engines, suggesting that those not listed are not subject to this AD. The AD extends or restricts its application through subordinate instruments, which are referenced in the requirements section.
Key Provisions
The Airworthiness Directive (AD) AD/RB211/21 Amdt 2, issued under subregulation 39.1 (1) of the Civil Aviation Regulations 1998, applies to specific Rolls Royce Turbine Engines, namely the RB211-535C-37, -535E4-37, -535E4-B-37 and -535E4-B-75 series engines that do not incorporate Rolls Royce Service Bulletin (SB) RB.211-72-C925 Revision 2 (section 1). The AD mandates three main actions to ensure airworthiness: ensuring aircraft are not fitted with both engines incorporating pre SB 72-C925 bearings with a concerning bearing time in service (section 2(a)), inspecting the oil scavenge filter for evidence of radial drive steady bearing failure (section 2(b)), and replacing specified radial drive steady bearings (section 2(c)). Compliance with these requirements must occur within specific timeframes: within 100 hours of time in service from the effective date of the Directive, from the effective date for inspections, and from the effective date for bearing replacement (section 3).
The AD imposes specific obligations on the parties governed by it. Aircraft operators and maintenance providers must ensure that aircraft are not fitted with both engines that incorporate pre SB 72-C925 bearings with a concerning bearing time in service, which involves adhering to Rolls Royce SB RB.211-72-D176 (section 2(a)). They must also inspect the oil scavenge filter for evidence of radial drive steady bearing failure in accordance with Rolls Royce SB RB.211-72-C815 Revision 3 (section 2(b)). Furthermore, they must remove from service any radial drive steady bearing identified by specific part numbers and prefixes, following the procedures outlined in Rolls Royce SB RB.211-72-C930 (section 2(c)). These obligations must be met within the specified timeframes to ensure continued airworthiness.
Failure to comply with the requirements of this AD can result in serious safety issues. The AD references UK CAA ADs 004-12-99, 004-09-2000, and FAA AD 2000-09-14, indicating the importance of these directives across multiple jurisdictions (section 2(c), Note). While the AD does not specify maximum penalties, non-compliance with Civil Aviation Regulations 1998 generally can result in civil penalties, including fines and potential criminal charges for more severe breaches, with penalties varying based on the nature and severity of the breach. The AD aims to prevent unsafe conditions that could compromise the safety of aircraft operations.