Commonwealth legislation

AD/HS 125/164 - Pitot/Static and Stall Vent Drain Valves

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

What it does: Requires operators of specified DH/HS/BH/BAe/Hawker 125‑series aircraft to drain and leak‑test pitot/static and stall vent drain valves using Raytheon service bulletins, and to seal, repair/replace, or modify valves depending on test results; modification of all valves ends repetitive testing.

Who it affects and why it matters: Affects aircraft owners, maintenance organisations and pilots by imposing inspections, possible parts/replacement and modification costs; CASA (the delegate) sets compliance timing and relies on Raytheon SBs for procedures.

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Current sections

Direct links to the current provisions in AD/HS 125/164 - Pitot/Static and Stall Vent Drain Valves.

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/HS 125/164 Pitot/Static and Stall Ven

AD/HS 125/164 Pitot/Static and Stall Vent Drain Valves 1/2001

Applicability: Model DH.125, Model HS.125, Model BH.125, Model BAe.125, Model Hawker 800, Model Hawker 800XP, and Model Hawker 1000 series aeroplanes; as listed in Raytheon Aircraft Service Bulletin SB 34-3207, dated August 1999; excluding those aeroplanes on which all pitot/static drain vent valves have been modified with an insert in accordance with Raytheon Aircraft Repair Design Office instructions.

Requirement: 1. Drain the pitot/static and stall vent drain valves, then perform a leak test of the systems, in accordance with SB 34-3207.

2. If, as a result of the Requirement 1 drain check, all drain valves are found to be operative, but any valve does not pass the leak test, accomplish one of the following actions:

apply a temporary seal of the drain valve(s) in accordance with Raytheon Aircraft SB 34-3223, dated August 1999; or

b. replace the drain valve components with new or serviceable drain valve components in accordance with SB 34-3207 and perform a leak test in accordance with SB 34-3207; or

c. modify the drain valves in accordance with Raytheon Aircraft SB 34-3282, dated August 1999.

Modification of ALL the drain valves in accordance with SB 34-3282 constitutes terminating action for the requirement to perform repetitive leak tests.

3. If any drain valve was sealed in accordance with Requirement 2.a., either Requirement 2.b. or 2.c. must be accomplished.

4. If, as a result of the Requirement 1 drain check, any drain valve is inoperative (eg. plugged or taped), whether or not any leaking is detected, disassemble the valve and clean all obstructions in accordance with SB 34-3207 and perform a general visual inspection for corrosion of the drain valve.

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/HS 125/164 Pitot/Static and Stall Ven AD/HS 125/164 Pitot/Static and Stall Vent Drain Valves 1/2001

AD/HS 125/164 Pitot/Static and Stall Vent Drain Valves 1/2001

Requirement: 1. Drain the pitot/static and stall vent drain valves, then perform a leak test of the systems, in accordance with SB 34-3207.

2. If, as a result of the Requirement 1 drain check, all drain valves are found to be operative, but any valve does not pass the leak test, accomplish one of the following actions:

apply a temporary seal of the drain valve(s) in accordance with Raytheon Aircraft SB 34-3223, dated August 1999; or

b. replace the drain valve components with new or serviceable drain valve components in accordance with SB 34-3207 and perform a leak test in accordance with SB 34-3207; or

c. modify the drain valves in accordance with Raytheon Aircraft SB 34-3282, dated August 1999.

Modification of ALL the drain valves in accordance with SB 34-3282 constitutes terminating action for the requirement to perform repetitive leak tests.

3. If any drain valve was sealed in accordance with Requirement 2.a., either Requirement 2.b. or 2.c. must be accomplished.

4. If, as a result of the Requirement 1 drain check, any drain valve is inoperative (eg. plugged or taped), whether or not any leaking is detected, disassemble the valve and clean all obstructions in accordance with SB 34-3207 and perform a general visual inspection for corrosion of the drain valve.