AIRWORTHINESS DIRECTIVE
On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/EMB-110/53 and issues the following 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.
Embraer EMB-110 (Bandeirante) Series Aeroplanes
AD/EMB-110/53
Amdt 1
Nose Landing Gear Rotating Cylinder Assembly
9/2004
DM
Applicability: All Model EMB-110 aircraft.
Requirement: 1. Inspect the nose landing gear rotating cylinder assembly, externally using dye- penetrant method and internally using a boroscope, in accordance with Embraer Service Bulletin (SB) No. 110-32-0088 Revision 03.
- If any cracks are evident during the inspection, replace the rotating cylinder assembly before further flight.
b. If severe corrosion but no cracks are evident during the inspection, before further flight, perform a Requirement 2 detailed bench inspection of the rotating cylinder assembly.
c. If light corrosion but no cracks are evident during the inspection, return the rotating cylinder assembly to service and repeat Requirement 1 inspections as specified in Compliance 1.c. below.
2. If no corrosion or cracks are evident during the Requirement 1 inspection, perform a detailed bench inspection of the rotating cylinder assembly in accordance with SB No. 110-32-0088 Revision 03.
- If severe corrosion or cracks are evident during the inspection, replace the rotating cylinder assembly before further flight.
b. If no corrosion or cracks are evident during the inspection, before further flight, apply a protection on the internal area of the rotating cylinder assembly in accordance with SB No. 110-32-0088 Revision 03.
c. If light corrosion, but no cracks are evident during the inspection, before further flight, apply a protection on the internal area of the rotating cylinder assembly in accordance with SB No. 110-32-0088 Revision 03 and repeat Requirement 1 inspections as specified in Compliance 2.c. below.
3. Replace the rotating cylinder assembly.
Note: Brazil CTA AD 2004-04-01 R1 refers.
Embraer EMB-110 (Bandeirante) Series Aeroplanes
AD/EMB-110/53 Amdt 1 (continued)
Compliance: 1. Within 150 flight hours or 120 calendar days after 28 July 2004, whichever occurs first.
1.c. At intervals not to exceed 150 flight hours or 120 calendar days, whichever occurs first, until accumulating 600 flight hours or 12 calendar months after 28 July 2004, whichever occurs first; when a Requirement 2 detailed bench inspection is required.
2. Within 600 flight hours or 12 calendar months after 28 July 2004, whichever occurs first.
2.c. At intervals not to exceed 600 flight hours or 9 calendar months, whichever occurs first; until replacement of the rotating cylinder assembly.
3. Before accumulating 3,000 flight hours or 36 months after 28 July 2004, whichever occurs first.
This Amendment becomes effective on 28 July 2004.
Background: The manufacturer received in-service reports of corrosion on the nose landing gear rotating cylinder assembly. Such corrosion could lead to cracking and could result in failure of the nose landing gear.
Amendment 1 is issued in response to a revision of the related CTA AD, which includes a requirement for a boroscope internal inspection of the nose landing gear rotating cylinder assembly.
The original issue of this Airworthiness Directive became effective on 8 July 2004.
David Villiers
Delegate of the Civil Aviation Safety Authority 22 July 2004
The above AD is notified in the Commonwealth of Australia Gazette on 28 July 2004.
Overview
The Embraer EMB-110 (Bandeirante) Series Aeroplanes Airworthiness Directive (AD) was enacted in 2004, as a legislative instrument by the Civil Aviation Safety Authority (CASA) under subregulation 39.1(1) of the Civil Aviation Safety Regulations 1998. This Airworthiness Directive was introduced to address safety concerns regarding corrosion in the nose landing gear rotating cylinder assembly of the Embraer EMB-110 aircraft, which could potentially lead to failure of the nose landing gear. The policy objective of this AD is to ensure that all applicable aircraft are inspected and maintained in accordance with the specified requirements to mitigate the identified safety risk. This directive revokes the previous AD/EMB-110/53 and introduces more stringent inspection and maintenance procedures, including the use of dye-penetrant and boroscope methods, to ensure the airworthiness of the affected aircraft.
Scope and Application
The Airworthiness Directive (AD) issued under the Civil Aviation Safety Regulations 1998 applies specifically to all Model EMB-110 aircraft, ensuring that these aircraft meet the safety standards set by the Civil Aviation Safety Authority (CASA). This AD is aimed at addressing safety concerns identified with the nose landing gear rotating cylinder assembly of the Embraer EMB-110 (Bandeirante) Series Aeroplanes, mandating detailed inspections and, where necessary, repairs or replacements to prevent potential failures. The AD stipulates precise requirements for inspecting the rotating cylinder assembly, using either a dye-penetrant method externally or a boroscope internally, in accordance with Embraer Service Bulletin No. 110-32-0088 Revision 03. The AD further outlines specific timelines for conducting these inspections and necessary actions based on the findings, including immediate replacement of the assembly if cracks are detected, or protective measures if corrosion is present without cracks. The AD's compliance section provides a clear schedule for inspections, either within a certain number of flight hours or calendar days after the effective date of 28 July 2004, ensuring that all EMB-110 aircraft maintain their airworthiness within these stipulated periods.
Key Provisions
The Airworthiness Directive (AD) AD/EMB-110/53 Amdt 1 specifies key requirements for the maintenance and inspection of the nose landing gear rotating cylinder assembly of all Model EMB-110 aircraft. The AD mandates a thorough inspection process, requiring an external inspection using the dye-penetrant method and an internal inspection using a boroscope, as outlined in Embraer Service Bulletin (SB) No. 110-32-0088 Revision 03. Depending on the findings during the inspection, actions such as replacement of the rotating cylinder assembly, detailed bench inspections, or application of protective coatings may be necessary.
The obligations imposed by the AD require aircraft owners, operators, and maintenance personnel to adhere to the specified inspection intervals and procedures. For example, the initial inspection must be conducted within 150 flight hours or 120 calendar days after 28 July 2004, whichever comes first. Subsequent inspections must occur at intervals not exceeding 150 flight hours or 120 calendar days, until 600 flight hours or 12 calendar months have passed since the effective date. Detailed bench inspections are required if severe corrosion is detected, and protective coatings must be applied if light corrosion is found but no cracks are present.
Failure to comply with the AD's requirements can result in serious safety implications, as the AD aims to prevent potential failures of the nose landing gear due to corrosion or cracking. While the AD itself does not explicitly state penalties for non-compliance, non-adherence to ADs can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). Such actions can include fines, grounding of the aircraft, or other regulatory measures to ensure compliance with airworthiness standards. The severity of the consequences may depend on the nature and extent of the non-compliance and the impact on aircraft safety.