Commonwealth legislation

AD/B767/6 - Flying Controls Self Locking Nuts

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

5/10 complexity

This airworthiness directive from CASA requires operators of specified Boeing 767s (line positions 2–121 and 124–126) to carry out inspections and corrective actions for certain self‑locking nuts in flight‑control systems, following Boeing Alert Service Bulletin 767-27A0064, FAA ADT85‑21‑51 and the referenced Requirement Document No. 2. It responds to reports of nuts backing off that could disconnect actuators and cause partial or total loss of control; operators bear costs and must obtain the external technical documents to comply.

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Current sections

Direct links to the current provisions in AD/B767/6 - Flying Controls Self Locking Nuts.

AD/B767/6 - Flying Controls Self Locking Nuts

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Boeing 767 Series Aeroplanes

AD/B767/6 Flying Controls Self Locking Nuts 12/85

Applicability: All Model 767 with line position 2 to 121, and 124 to 126. Requirement: Action in accordance with:

Boeing Alert Service Bulletin 767-27A0064.

2. (FAA ADT85-21-51 Paras. A and B refer). Compliance: As detailed in Requirement Document No. 2.

Background: The manufacturer has advised that two incidents of defective self-locking nuts found in the primary flight control system (horizontal stabilizer) have been reported. The same type of nut is also used in the secondary flight control system - trailing edge flap and spoiler.

These reports indicate that the self-locking nuts have backed off which could cause the disconnection of actuators from control surfaces and result in complete or partial loss of control of the aircraft.

Source text

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

1 AD/B767/6 - Flying Controls Self Locking Nuts

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Boeing 767 Series Aeroplanes

AD/B767/6 Flying Controls Self Locking Nuts 12/85

Applicability: All Model 767 with line position 2 to 121, and 124 to 126. Requirement: Action in accordance with:

Boeing Alert Service Bulletin 767-27A0064.

2. (FAA ADT85-21-51 Paras. A and B refer). Compliance: As detailed in Requirement Document No. 2.