Commonwealth legislation

AD/B767/8 Amdt 3 - Intermediate Pressure Check Valves

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This Airworthiness Directive requires operators of Boeing 767 aircraft fitted with Hamilton Standard 8th‑stage bleed check valves (Part Nos. 773856‑3 to ‑15) to inspect those valves per specified Hamilton Standard service bulletins within 500 flight hours and then every 1,200 hours; completing Service Bulletin 36‑2116 is a terminating action that ends the recurring inspections. CASA states the measure responds to reports of valve fragments, cracked valves and engine damage; operators must carry out and fund inspections or the terminating modification and follow the external service instructions provided.

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Current sections

Direct links to the current provisions in AD/B767/8 Amdt 3 - Intermediate Pressure Check Valves.

AD/B767/8 Amdt 3 - Intermediate Pressure Check Valves

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
View image in the official source
Boeing 767 Series Aeroplanes

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 revokes Airworthiness Directive (AD) AD/B767/8 Amdt 2 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 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/B767/8

Amdt 3

Intermediate Pressure Check Valves 3/2000

Applicability: Boeing 767 series aircraft equipped with Hamilton Standard 8th stage bleed pneumatic system check valves, Part Nos. 773856-3 through -15.

Requirement: Inspect affected 8th stage bleed check valves in accordance with Hamilton Standard Service Bulletin 36-2078, 36-2078 Revision 1 or 36-2078 Revision 2.

Compliance with Hamilton Standard Service Bulletin 36-2116, either original issue or Revision 1, constitutes terminating action for this airworthiness directive.

Note: FAA AD 90-12-02 refers. AD 90-12-02 supersedes AD 90-04-10.

Compliance: Unless previously accomplished, within 500 flight hours after the effective date of this airworthiness directive, and thereafter at intervals not to exceed 1200 flight hours.

This Amendment becomes effective on 23 March 2000.

Background: The FAA has received reports of fragments of failed valves becoming lodged in other pneumatic system components, engine damage caused by fragment ingestion and cracked valve removals.

This amendment updates the AD and provides terminating action for the required inspection.

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Amendment 2 was raised in response to reports of cracks being found in previously modified check valves at considerably less hours time in service than the current inspection interval.

Amendment 2 of this Airworthiness Directive became effective on 17 May 1990.

Amendment 1 of this Airworthiness Directive became effective on 30 September 1987.

The original issue of this Airworthiness Directive became effective on 16 April 1986.

Signature of Eugene Paul Holzapfel, Delegate of the Civil Aviation Safety Authority.

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority

12 February 2000

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 23 February 2000.

Source text

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

1 AD/B767/8 Amdt 3 - Intermediate Pressure Check Valves

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Boeing 767 Series Aeroplanes

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/B767/8 Amdt 2 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 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/B767/8

Amdt 3

Intermediate Pressure Check Valves 3/2000

Applicability: Boeing 767 series aircraft equipped with Hamilton Standard 8th stage bleed pneumatic system check valves, Part Nos. 773856-3 through -15.

Requirement: Inspect affected 8th stage bleed check valves in accordance with Hamilton Standard Service Bulletin 36-2078, 36-2078 Revision 1 or 36-2078 Revision 2.

Compliance with Hamilton Standard Service Bulletin 36-2116, either original issue or Revision 1, constitutes terminating action for this airworthiness directive.

Note: FAA AD 90-12-02 refers. AD 90-12-02 supersedes AD 90-04-10.

Compliance: Unless previously accomplished, within 500 flight hours after the effective date of this airworthiness directive, and thereafter at intervals not to exceed 1200 flight hours.

This Amendment becomes effective on 23 March 2000.

Background: The FAA has received reports of fragments of failed valves becoming lodged in other pneumatic system components, engine damage caused by fragment ingestion and cracked valve removals.

This amendment updates the AD and provides terminating action for the required inspection.

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Amendment 2 was raised in response to reports of cracks being found in previously modified check valves at considerably less hours time in service than the current inspection interval.