{"id":"F2007L02354","name":"AD/B717/22 - First Officer Pitot Static Heater System","slug":"ad-b717-22-first-officer-pitot-static-heater-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67680,"registerId":"commonwealth-F2007L02354-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 717 Series Aeroplanes","sectionType":"division","heading":"Boeing 717 Series Aeroplanes","content":"### Boeing 717 Series Aeroplanes\n\n| AD/B717/22 | First Officer Pitot Static Heater System | 9/2007 |\n| ---------- | ---------------------------------------- | ------ |\n\n| Applicability: | Model 717-200 aeroplanes, as identified in Boeing Alert Service Bulletin (ASB)717-30A0003, Revision 2, dated 28 November 2006.                                                                                                                                                                                                                                           |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Change the wiring for the air data sensor heating system, by accomplishing all the actions specified in the Accomplishment Instructions of ASB 717-30A0003,Revision 2.                                                                                                                                                                                                   |\n|                | Actions accomplished before the effective date of this Directive in accordance with Boeing ASB717-30A0003, Revision 1, dated 2 March 2006, are acceptable for compliance with the corresponding provisions of this Directive.                                                                                                                                            |\n|                | Later revisions of the above SB, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2007-13-01, are considered acceptable for compliance with the equivalent Requirements of this Directive.                                                                                                      |\n|                | Note: FAA AD 2007-13-01 Amdt 39-15105 refers.                                                                                                                                                                                                                                                                                                                            |\n| Compliance:    | Within 24 months after the effective date of this Directive.                                                                                                                                                                                                                                                                                                             |\n|                | This Airworthiness Directive becomes effective on 30 August 2007.                                                                                                                                                                                                                                                                                                        |\n| Background:    | The FAA has advised of a report of temporary loss of the auto-flight function with displays of suspect or erratic airspeed indications. This Directive is issued to prevent display of suspect or erratic airspeed indications during heavy rain conditions, which could reduce the ability of the flight crew to maintain the safe flight and landing of the aeroplane. |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n3 July 2007","sortOrder":0},{"sectionNumber":"AD/B717/22","sectionType":"part","heading":"AD/B717/22","content":"## AD/B717/22","sortOrder":1},{"sectionNumber":"First Officer Pitot Static Heater System","sectionType":"part","heading":"First Officer Pitot Static Heater System","content":"## First Officer Pitot Static Heater System","sortOrder":2},{"sectionNumber":"9/2007","sectionType":"part","heading":"9/2007","content":"## 9/2007","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific wiring defect in a specific aircraft system. The scope remains precisely limited to the pitot-static heater wiring modification as originally identified by the FAA and Boeing."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined term implicitly referenced (the Boeing ASB)","Single, unambiguous compliance action (rewiring per specific instructions)","Minimal conditional logic (only two simple grandfathering clauses for prior/alternative compliance)","No cross-references to other legislation or regulations beyond the cited FAA AD and Boeing service bulletin","Clear, single deadline (24 months from effective date)"],"plain_english_summary":"Australia's CASA requires rewiring the First Officer's pitot-static heater system on Boeing 717-200s to prevent icing/moisture from causing erratic airspeed/auto‑flight failures. It affects owners, operators and maintenance personnel who must complete the change within 24 months of August 2007. Repairs done per Boeing Revision 1 (Mar 2006) or later FAA‑approved revisions meet the requirement."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The Directive addresses a specific technical safety issue (wiring change for the first officer pitot/static heater system) and remains within that original technical scope. It does not broaden the subject matter beyond that corrective action; it only allows limited flexibility on compliance methods by accepting earlier ASB work done before the effective date and FAA‑approved AMOCs. Accordingly the scope has not grown significantly beyond the Directive's original purpose."},"complexity_factors":["Short, single‑issue airworthiness directive focused on one modification","Applicability limited to one model series (Boeing 717‑200)","Primary technical detail contained in an external Boeing ASB (ASB717‑30A0003 Rev 2) rather than in the Directive text","Cross‑reference to an FAA airworthiness directive (FAA AD 2007‑13‑01) and acceptance of FAA‑approved AMOCs","Simple compliance condition and single deadline (24 months)","Provision accepting earlier ASB Revision 1 if done before effective date (minor conditionality)"],"plain_english_summary":"**What this Directive does (mechanically)**\n\n- Applicability: It applies to Boeing 717-200 aeroplanes identified in Boeing Alert Service Bulletin (ASB) 717-30A0003, Revision 2 (see \"Applicability\" in the text).\n- Requirement: Operators must change the wiring of the air‑data sensor (pitot/static) heating system for the first officer side by carrying out all actions in the Accomplishment Instructions of Boeing ASB 717‑30A0003, Revision 2 (see \"Requirement\").\n- Compliance window: The work must be completed within 24 months of the Directive becoming effective (the Directive became effective 30 August 2007) (see \"Compliance\").\n- Acceptable alternatives: If the wiring change was done before the effective date in accordance with Revision 1 of the ASB (dated 2 March 2006), that satisfies the requirement. Also, later revisions of the ASB that have been approved by the FAA as an Alternate Method of Compliance (AMOC) to FAA AD 2007‑13‑01 are acceptable for compliance with the equivalent requirements of this Directive (see \"Requirement\").\n\n**Why this matters (official rationale and practical effect)**\n\n- Official rationale: The FAA reported a temporary loss of the auto‑flight function associated with suspect or erratic airspeed indications during heavy rain. The stated purpose of the Directive is to prevent display of suspect or erratic airspeed indications in heavy rain, which could reduce the crew's ability to maintain safe flight and landing (see \"Background\").\n\n**Who is affected and who acts**\n\n- Who must act: Aircraft owners/operators of affected Boeing 717‑200 aeroplanes must arrange the wiring change.\n- Who carries out the work: An appropriately authorised maintenance organisation (or other mechanics authorised under aviation regulations) must perform the wiring change to the standard in the Boeing ASB.\n- Who decides on alternatives: The FAA may approve alternate methods (AMOCs) for the ASB; the Directive accepts FAA‑approved AMOCs (see \"Requirement\").\n\n**Costs, incentives and trade‑offs**\n\n- Who pays: The operator (airline or aircraft owner) bears the direct cost of the maintenance work, any parts, and the aircraft downtime while the work is done.\n- Benefits: The safety benefit is reduced risk of erroneous airspeed displays and associated auto‑flight losses under certain weather conditions; this is concentrated in the affected aircraft and their crews/passengers.\n- Burden: The Directive imposes a compliance scheduling burden and maintenance cost on operators. The technical complexity of the actual wiring change is delegated to the Boeing ASB; that procedure determines labour hours and parts (the Directive itself does not list those details).\n- Substitution and flexibility: Operators may comply by following Revision 2 of the ASB, an earlier Revision 1 if done before the effective date, or later FAA‑approved AMOCs. This allows some flexibility where the FAA has authorised alternate methods.\n- Implementation risk: The operational risk if not complied with is continued exposure to erratic airspeed indications in heavy rain; implementation risk lies in ensuring maintenance is done correctly to the ASB standard. The Directive relies on external technical documentation (the ASB), so clarity and completeness of that document determine practical execution costs and error risk.\n\n**Mechanisms and behavioural effect**\n\n- The Directive creates a legal obligation to modify wiring per a specified service bulletin. Operators will need to: (a) identify affected aircraft, (b) schedule and fund the modification within 24 months, and (c) document compliance. Maintenance organisations will follow the ASB instructions and may seek FAA AMOCs if proposing alternative means.\n\n**Other practical notes**\n\n- The Directive cross‑references FAA AD 2007‑13‑01; it treats FAA‑approved later ASB revisions as acceptable AMOCs. This ties acceptance of alternate technical approaches to FAA approvals rather than a separate domestic approval process (see \"Requirement\")."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b717-22-first-officer-pitot-static-heater-system","history":"/api/acts/ad-b717-22-first-officer-pitot-static-heater-system/history","analysis":"/api/acts/ad-b717-22-first-officer-pitot-static-heater-system/analysis","conflicts":"/api/acts/ad-b717-22-first-officer-pitot-static-heater-system/conflicts","importantCases":"/api/acts/ad-b717-22-first-officer-pitot-static-heater-system/important-cases","documents":"/api/acts/ad-b717-22-first-officer-pitot-static-heater-system/documents"}}