{"id":"F2006B10442","name":"AD/HS 125/160 - Flight Control Cables and Pitot Pipes","slug":"ad-hs-125-160-flight-control-cables-and-pitot-pipes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116147,"registerId":"commonwealth-F2006B10442-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor 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 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.","sortOrder":0},{"sectionNumber":"AD/HS 125/160 Flight Control Cables and ","sectionType":"part","heading":"AD/HS 125/160 Flight Control Cables and Pitot Pipes 2/2000","content":"# AD/HS 125/160 Flight Control Cables and Pitot Pipes 2/2000\n\nApplicability: All Model BAe 125 series 1000A and 1000B, and Model Hawker 1000 series aeroplanes.\n\nRequirement: 1. Perform a one-time general visual inspection to detect chafing or damage of the P1 pitot pipes, in accordance with Raytheon Service Bulletin SB.34-3028, dated January 1998.\n\nNote 1: For the purposes of this directive, a general visual inspection is defined as: \"A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or drop-light, and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.\"\n\n    2. If no chafing or damage is found during the Requirement 1 inspection, ensure a clearance of 0.25 inch or more exists between the P1 pitot pipes and flight control cables. If clearance is less than 0.25 inch, reposition the P1 pitot pipes to achieve\n\n0.25 inch clearance, in accordance with the service bulletin.\n\n    3. If a pitot pipe is found to be chafed or damaged during the Requirement 1 inspection, accomplish the following:\n\n    Replace the discrepant pitot pipe with a new pipe, and ensure that a clearance of\n\n0.25 inch or more exists between the flight control cables and the new pitot pipe, in accordance with the service bulletin. If clearance is less than 0.25 inch, reposition the P1 pitot pipes to achieve 0.25 inch clearance, in accordance with the service bulletin.\n\n    b. Perform a general visual inspection for damage of the flight control cables adjacent to the area of chafing or damage of the P1 pitot pipes, in accordance with the service bulletin. If damage is found, replace the damaged flight control cables with new cables in accordance with Chapter 20-10-31 of the Aircraft Maintenance Manual.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive’s scope is corrective and model‑specific: it targets all BAe 125 series 1000A/1000B and Hawker 1000 aircraft to inspect and repair pitot pipes and adjacent cables. The instrument does not expand or narrow the fleet coverage beyond that stated in the Applicability."},"complexity_factors":["Technical tolerance requirement: a specific 0.25 inch minimum clearance must be measured and achieved (Requirement 2 and 3).","Reference to external technical documents for method: actions must be done “in accordance with Raytheon Service Bulletin SB.34-3028, dated January 1998” (Requirement 1) and AMM Chapter 20-10-31 for cable replacement (Requirement 3b).","Inspection standard and access: the AD requires a ‘general visual inspection’ as defined in Note 1, which may require removal of access panels and use of stands/flashlights.","Remedial work: if damage is found, replacement of pitot pipes and possibly flight control cables is mandatory, creating parts and labour burden (Requirement 3).","Limited applicability: applies only to specific BAe/Hawker 1000 series models, concentrating costs on a defined operator group (Applicability).","Regulatory authority and discretion: issued under CASA delegate power (subregulation 39.1(1) of CAR 1998) which sets the requirement and compliance terms (preamble).","Compliance timing reference: the AD text refers to a compliance section for timing (‘at the time mentioned in the compliance section’) but that timing detail is not included in the excerpt, introducing implementation uncertainty."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of BAe 125 series 1000A/1000B and Hawker 1000 aircraft to perform a one‑time visual inspection of P1 pitot pipes and adjacent flight control cables, fix or replace any chafed or damaged parts, and ensure at least 0.25‑inch clearance, following Raytheon Service Bulletin SB.34-3028 and the Aircraft Maintenance Manual. It places the inspection, adjustment and replacement costs and work on operators/maintenance organisations; the directive is issued by a CASA delegate under CAR subregulation 39.1(1) to correct an unsafe condition."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive with focused, original scope—addressing a specific unsafe condition (pitot pipe/flight control cable interference) on specific aircraft models. No scope creep evident."},"complexity_factors":["Short, single-purpose directive with clear sequential requirements","Only 3 main requirements with straightforward conditional logic (if/then structure)","Single defined term ('general visual inspection') with explicit definition provided","References external technical document (Raytheon Service Bulletin SB.34-3028) but incorporates key specifications (0.25 inch clearance) directly in the text","No nested exceptions or complex cross-referencing between sections","Limited applicability (specific aircraft models only)"],"plain_english_summary":"This CASA safety order requires owners/operators and maintenance engineers of BAe 125‑1000A/1000B and Hawker 1000 series jets to inspect the P1 pitot pipes for chafing or damage. If clear, ensure at least 0.25 in (6 mm) clearance from flight‑control cables; if damaged, replace the pipe, ensure clearance, and inspect/replace any affected cables.  \n\nThe measure prevents air‑data errors and potential flight‑control failures by catching wear early and restoring proper separation."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-160-flight-control-cables-and-pitot-pipes","history":"/api/acts/ad-hs-125-160-flight-control-cables-and-pitot-pipes/history","analysis":"/api/acts/ad-hs-125-160-flight-control-cables-and-pitot-pipes/analysis","conflicts":"/api/acts/ad-hs-125-160-flight-control-cables-and-pitot-pipes/conflicts","importantCases":"/api/acts/ad-hs-125-160-flight-control-cables-and-pitot-pipes/important-cases","documents":"/api/acts/ad-hs-125-160-flight-control-cables-and-pitot-pipes/documents"}}