Commonwealth legislation

AD/B767/121 - Strut Side Load Underwing Fitting Bolts

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This AD requires operators of Boeing 767 aircraft (line numbers 1–230) to perform a one‑time check of the side‑load underwing fitting tension bolts to see if H‑11 steel bolts are installed; if any are found or the type is unknown, ultrasonic inspections for cracking are required and cracked bolts must be replaced before further flight. Replacing all H‑11 bolts per Boeing service instructions ends the directive. The Authority states the action corrects an unsafe condition; operators pay inspection, testing and replacement costs and must schedule aircraft downtime to comply.

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Current sections

Direct links to the current provisions in AD/B767/121 - Strut Side Load Underwing Fitting Bolts.

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/B767/121 Strut Side Load Underwing Fi

AD/B767/121 Strut Side Load Underwing Fitting Bolts 7/2000

Applicability: Model 767 series aircraft, line numbers 1 through 230 inclusive.

Requirement: 1. Perform a one-time inspection of the tension bolts in the side load underwing fittings on both struts to determine whether tension bolts made of H-11 steel are installed, in accordance with Boeing Alert Service Bulletin (ASB) 767-57A0074, dated 17 May 2000, or Revision 1, dated 18 May 2000.

If the inspection shows conclusively that no H-11 steel bolt is installed, no further action is required by this Directive.

If any H-11 steel bolt is found during the Requirement 1 inspection, or if the type of bolt cannot be determined, before further flight, perform an ultrasonic inspection to detect cracking or fracturing of the tension bolts in the side load underwing fittings on both struts, in accordance with Boeing ASB 767-57A0074 or ASB 767-57A0074 Revision 1.

If any cracked or fractured bolt is found during any Requirement 2 inspection, before further flight, replace both tension bolts in the affected side load underwing fitting with new, improved bolts in accordance with Boeing ASB 767-57A0074 or ASB 767-57A0074 Revision 1.

If both tension bolts in one side load underwing fitting are found cracked or fractured during any Requirement 2 inspection, before further flight, perform inspections to detect discrepancies of adjacent structure in accordance with a method acceptable to the Authority.

Note 1: Replacement of all H-11 steel tension bolts in the side load underwing fittings on both struts with new, improved bolts, in accordance with Boeing ASB 767- 57A0074, or Boeing ASB 767-57A0074 Revision 1, constitutes terminating action for this Directive.

Note 2: FAA Emergency AD 2000-10 -51 refers.

Source text

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

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE

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/B767/121 Strut Side Load Underwing Fi AD/B767/121 Strut Side Load Underwing Fitting Bolts 7/2000

AD/B767/121 Strut Side Load Underwing Fitting Bolts 7/2000

Applicability: Model 767 series aircraft, line numbers 1 through 230 inclusive.

If the inspection shows conclusively that no H-11 steel bolt is installed, no further action is required by this Directive.

If any H-11 steel bolt is found during the Requirement 1 inspection, or if the type of bolt cannot be determined, before further flight, perform an ultrasonic inspection to detect cracking or fracturing of the tension bolts in the side load underwing fittings on both struts, in accordance with Boeing ASB 767-57A0074 or ASB 767-57A0074 Revision 1.