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 CASR 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.
Boeing 727 Series Aeroplanes
AD/B727/189 Engine Mount Forward Cone Bolt
Flange Attachment
7/2004
Applicability: All Model 727, 727C, 727-100, 727-100C, 727-200, and 727-200F series aircraft.
Requirement: 1. Inspect the bolts that are used to attach the forward cone bolt to the engine flange to determine if they are H-11 steel bolts (part number (P/N) BACB30GU12-64), cadmium-plated bolts (P/N BACB30LM12-64), or corrosion resistant bolts (P/N NAS6712E64 or B27-53-031-111, not listed in the service bulletin), in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin (ASB) 727-71A0402, dated 18 January 2001.
- If corrosion resistant bolts, P/N NAS6712E64 or P/N B27-53-031-111 are installed, no further action is required.
b. If any H-11 steel bolt or cadmium-plated bolt is found, before further flight, replace the bolt with a new corrosion resistant bolt, P/N NAS6712E64, in accordance with the Accomplishment Instructions of ASB 727-71A0402.
2 No H-11 steel bolt, P/N BACB30GU12-64, or cadmium-plated bolt, P/N BACB30LM12-64 shall be installed to attach the forward cone bolt to the engine flange on any aircraft.
Note: FAA AD 2004-09-36 Amdt 39-13627 refers.
Compliance: 1. Within 18 months or 3,000 flight cycles after 8 July 2004, whichever occurs first.
2. As of the effective date of this Directive
This Airworthiness Directive becomes effective on 8 July 2004.
Boeing 727 Series Aeroplanes
AD/B727/189 (continued)
Background: The FAA requires an inspection of the bolts used to attach the engine mount forward cone bolt to the engine flange to determine what bolts are installed, and replacement of certain bolts. This action is necessary to prevent undetected cracking of H-11 bolts or excessive wear of cadmium-plated bolts, which could compromise the load path of the engine support and could result in separation of the engine from the aircraft.
David Villiers
Delegate of the Civil Aviation Safety Authority 28 May 2004
The above AD is notified in the Commonwealth of Australia Gazette on 16 June 2004.
Overview
The Airworthiness Directive (AD) for Boeing 727 Series Aeroplanes, issued on 8 July 2004, was enacted under subregulation 39.1(1) of the Civil Aviation Safety Regulations 1998 by the Civil Aviation Safety Authority (CASA) to address an identified safety issue. This AD specifically targets the bolts used for attaching the engine mount forward cone bolt to the engine flange, mandating inspections and replacements to prevent potential cracking or excessive wear that could compromise the engine support and lead to engine separation from the aircraft. The directive applies to all Model 727, 727C, 727-100, 727-100C, 727-200, and 727-200F series aircraft. Compliance with the directive is required within 18 months or 3,000 flight cycles from the effective date, whichever comes first, ensuring that no H-11 steel bolts or cadmium-plated bolts remain installed on any aircraft.
Scope and Application
The Airworthiness Directive AD/B727/189 issued by the Civil Aviation Safety Authority (CASA) pertains specifically to all Boeing 727 series aircraft, including the Model 727, 727C, 727-100, 727-100C, 727-200, and 727-200F. The directive mandates an inspection of the bolts attaching the forward cone bolt to the engine flange to ascertain whether they are H-11 steel bolts, cadmium-plated bolts, or corrosion-resistant bolts. If the inspection reveals the presence of H-11 steel bolts or cadmium-plated bolts, these must be replaced with corrosion-resistant bolts before further flight. Conversely, if the bolts are already corrosion-resistant, no further action is required. The directive also stipulates that H-11 steel bolts or cadmium-plated bolts should not be installed to attach the forward cone bolt to the engine flange on any aircraft. Compliance with this directive must be achieved within 18 months or 3,000 flight cycles from the directive's effective date of 8 July 2004, whichever occurs first. This AD extends to the entire Commonwealth of Australia and is applicable to any person or entity operating Boeing 727 series aircraft within the national airspace.
Key Provisions
The Airworthiness Directive (AD) issued under subregulation 39.1(1) of the Civil Aviation Safety Regulations 1998 (CASR) mandates specific actions to be taken for Boeing 727 Series Aeroplanes to ensure they meet safety standards. The AD applies to all Model 727, 727C, 727-100, 727-100C, 727-200, and 727-200F series aircraft (Applicability). The directive requires an inspection of the bolts attaching the forward cone bolt to the engine flange to identify if they are H-11 steel bolts (P/N BACB30GU12-64), cadmium-plated bolts (P/N BACB30LM12-64), or corrosion-resistant bolts (P/N NAS6712E64 or B27-53-031-111) (Requirement 1). If corrosion-resistant bolts are present, no further action is required. However, if H-11 steel bolts or cadmium-plated bolts are detected, they must be replaced with new corrosion-resistant bolts (P/N NAS6712E64) before further flights (Requirement 1b). Additionally, it is prohibited to install H-11 steel bolts (P/N BACB30GU12-64) or cadmium-plated bolts (P/N BACB30LM12-64) to attach the forward cone bolt to the engine flange on any aircraft (Requirement 2). The compliance period requires these actions to be completed within 18 months or 3,000 flight cycles after the directive's effective date of 8 July 2004, whichever comes first (Compliance).
The AD imposes several obligations on the operators of Boeing 727 Series Aeroplanes. Firstly, they must inspect the specified bolts according to the Accomplishment Instructions of Boeing Alert Service Bulletin (ASB) 727-71A0402, dated 18 January 2001. Secondly, if any H-11 steel or cadmium-plated bolts are found, operators must replace them with corrosion-resistant bolts (P/N NAS6712E64) before further flights. Additionally, operators are prohibited from installing H-11 steel or cadmium-plated bolts on the aircraft. Compliance with these requirements must be achieved within the specified timeframe to maintain the airworthiness of the aircraft.
Failure to comply with the Airworthiness Directive can result in civil and criminal consequences. Non-compliance with airworthiness directives can lead to the grounding of the aircraft until the required actions are completed. Furthermore, the AD references FAA AD 2004-09-36 Amdt 39-13627, indicating that the consequences for non-compliance could include severe penalties. The exact penalties are not detailed in the AD, but they may include fines, imprisonment, or both, depending on the severity of the breach and the specific regulations governing the enforcement of airworthiness standards in Australia.