{"id":"F2005L01188","name":"AD/HS 125/175 - Emergency Radio Wiring","slug":"ad-hs-125-175-emergency-radio-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":34856,"registerId":"commonwealth-F2005L01188-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"British Aerospace BAe 125 Series Aeropla","sectionType":"division","heading":"British Aerospace BAe 125 Series Aeroplanes","content":"### British Aerospace BAe 125 Series Aeroplanes\n\n| AD/HS 125/175 | Emergency Radio Wiring | 7/2005 DM |\n| ------------- | ---------------------- | --------- |\n\n| Applicability: | Hawker 800XP aeroplanes serial numbers 258541, 258556 and 258567 through 258608 inclusive.                                                                                                                                                                                                                                                                    |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Perform a detailed inspection for damage (primarily but not limited to evidence of heat damage) of wiring in the flight compartment in accordance with Part 1 of the Accomplishment Instructions of Raytheon Service Bulletin (SB) 24-3555, Revision 1 dated June 2004.                                                                                    |\n|                | Note 1: For the purposes of this Directive, a detailed inspection is: “An intensive examination of a specific item, installation or assembly to detect damage, failure or irregularity. A direct source of good lighting as well as inspection aids such as mirrors, magnifying lenses, etc., may be necessary. Surfaces may also be required to be cleaned.” |\n|                | 2. If damage is found in the wiring, repair in accordance with Part 1of the Accomplishment Instructions of SB 24-3555 Rev 1.                                                                                                                                                                                                                                  |\n|                | 3. Modify Emergency Radio Circuit as detailed in the Part 2 of the Accomplishment Instructions of SB 24-3555 Rev 1.                                                                                                                                                                                                                                           |\n|                | 4. Conduct functionality check of the emergency radio system.                                                                                                                                                                                                                                                                                                 |\n|                | 5. Revise Aircraft Fight Manual Emergency Procedure section by inserting Temporary Change P/N 140-590032-0005TC7.                                                                                                                                                                                                                                             |\n|                | Note 2: FAA AD 2005-09-03 Amdt 39-14071 refers.                                                                                                                                                                                                                                                                                                               |\n| Compliance:    | For Requirement 1 - Within 50 hours time in service (TIS) or 30 days, whichever occurs first, after the effective date of this Directive.                                                                                                                                                                                                                     |\n|                | For Requirement 2 - Before further flight after Requirement 1 inspection.                                                                                                                                                                                                                                                                                     |\n|                | For Requirement 3:                                                                                                                                                                                                                                                                                                                                            |\n|                | a. If damage was found during the Requirement 1 inspection - Before further flight after the inspection.                                                                                                                                                                                                                                                      |\n\n|             | b. If damage was not found during the Requirement 1 inspection - Within 300 hours TIS or 180 calendar days after the effective date of this Directive.                                                                                                           |\n| ----------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|             | For Requirement 4 - Before further flight after the Requirement 3 modification is accomplished.                                                                                                                                                                  |\n|             | For Requirement 5 - Before further flight after the Requirement 3 modification is accomplished.                                                                                                                                                                  |\n|             | This Airworthiness Directive becomes effective on 1 June 2005.                                                                                                                                                                                                   |\n| Background: | The United States Federal Aviation Administration (FAA) has advised of possible miswiring in the power distribution system, which could cause damage due to excessive current flow in the electrical circuit that could result in smoke or fire in the aircraft. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n12 May 2005","sortOrder":0},{"sectionNumber":"AD/HS 125/175","sectionType":"part","heading":"AD/HS 125/175","content":"## AD/HS 125/175","sortOrder":1},{"sectionNumber":"Emergency Radio Wiring","sectionType":"part","heading":"Emergency Radio Wiring","content":"## Emergency Radio Wiring","sortOrder":2},{"sectionNumber":"7/2005 DM","sectionType":"part","heading":"7/2005 DM","content":"## 7/2005 DM","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The text confines action to specified serial-numbered Hawker 800XP aeroplanes and sets inspection, repair, modification and manual-update requirements. It references FAA AD 2005-09-03 but does not indicate any expansion or reduction of applicability beyond the listed aircraft or alteration of the prescribed corrective actions."},"complexity_factors":["Targeted applicability to a short list of Hawker 800XP serial numbers (narrow scope).","Reliance on Raytheon Service Bulletin 24-3555 Revision 1 Parts 1 & 2 for the required inspection, repair and modification actions.","Multiple, conditional compliance deadlines (50 hours/30 days for initial inspection; before further flight if damage; otherwise 300 hours/180 days for modification; 'before further flight' for checks and manual update).","Detailed inspection standard requires cleaning, direct lighting and inspection aids (mirrors/magnifiers), increasing labour/time per aircraft.","Immediate operational constraint where damage is found (repairs required before further flight), raising downtime risk.","Mandated revision to the Aircraft Flight Manual via a specified Temporary Change P/N, creating a documentation/compliance step.","Reference to FAA AD 2005-09-03 — the Directive aligns with an external regulator's finding, which may affect coordination and approval pathways."],"plain_english_summary":"This Airworthiness Directive requires operators of specified Hawker 800XP aeroplanes (listed serial numbers) to inspect flight‑compartment wiring for heat or other damage, repair any faults, modify the emergency‑radio circuit per Raytheon Service Bulletin 24‑3555 Rev 1, run a functionality check, and insert a temporary change into the Aircraft Flight Manual. Deadlines vary (50 hours/30 days; before further flight; or within 300 hours/180 days) depending on findings. The FAA warned of possible miswiring that could cause excessive current, smoke or fire; compliance costs and downtime fall to owners/operators."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard single-issue Airworthiness Directive addressing a specific wiring safety defect in specific aircraft. It has not expanded beyond its original purpose of mandating inspection and repair of emergency radio wiring."},"complexity_factors":["Multiple conditional compliance deadlines (5 different timelines depending on findings and requirements)","Cross-reference to external technical document (Raytheon Service Bulletin SB 24-3555 Rev 1) which is not reproduced in the directive","Nested conditional logic for Requirement 3 (different deadlines based on whether damage was found in Requirement 1)","Reference to FAA AD 2005-09-03 for additional context","Specific serial number applicability range with gaps (258541, 258556, then 258567-258608)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's aviation regulator (CASA) that requires specific aircraft owners/operators to fix a dangerous wiring problem.\n\n**What it does:**\n- **Targets:** Three specific Hawker 800XP business jets (serial numbers 258541, 258556, and 258567 through 258608)\n- **The problem:** Faulty wiring in the emergency radio system could overheat, causing smoke or fire in the cockpit\n- **What must happen:**\n  1. **Inspect** the wiring for heat damage within 50 flight hours or 30 days\n  2. **Repair** any damaged wiring immediately before flying again\n  3. **Modify** the emergency radio circuit (either immediately if damage found, or within 300 flight hours/180 days if no damage)\n  4. **Test** that the emergency radio still works after modifications\n  5. **Update** the aircraft's flight manual with new emergency procedures\n\n**Who it affects:**\n- Owners and operators of these specific Hawker 800XP aircraft\n- Maintenance engineers working on these planes\n\n**Why it matters:**\nThis prevents potential in-flight fires. The FAA (American regulator) discovered this defect, and Australia is adopting the same safety requirement. Non-compliance means the aircraft cannot legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-175-emergency-radio-wiring","history":"/api/acts/ad-hs-125-175-emergency-radio-wiring/history","analysis":"/api/acts/ad-hs-125-175-emergency-radio-wiring/analysis","conflicts":"/api/acts/ad-hs-125-175-emergency-radio-wiring/conflicts","importantCases":"/api/acts/ad-hs-125-175-emergency-radio-wiring/important-cases","documents":"/api/acts/ad-hs-125-175-emergency-radio-wiring/documents"}}