{"id":"F2008L00610","name":"AD/B717/28 - Electrical Bonding","slug":"ad-b717-28-electrical-bonding","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":72624,"registerId":"commonwealth-F2008L00610-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/B717/28 | Electrical Bonding | 3/2008 |\n| ---------- | ------------------ | ------ |\n\n| Applicability: | Model 717-200 aeroplanes, as identified in Boeing Service Bulletin (SB)717-28-0012, Revision 1, dated 7 June 2006.                                                                                                                                                                                                                              |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Accomplish the electrical bonding of the fill valves for the right and left main fuel tanks, the fill valve and pipe assembly for the centre wing fuel tank, and the defuel shutoff valve, in accordance with the Accomplishment Instructions of SB717-28-0012, Revision 1.                                                                     |\n|                | Actions accomplished before the effective date of this Directive in accordance with Boeing Service Bulletin 717-28-0012, dated 16 April 2004, are considered acceptable for compliance with the corresponding actions specified in 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 2008-02-08, are considered acceptable for compliance with the equivalent Requirements of this Directive.                                                                             |\n|                | Note: FAA AD 2008-02-08 Amdt 39-15338 refers.                                                                                                                                                                                                                                                                                                   |\n| Compliance:    | Within 60 months after the effective date of this Directive.                                                                                                                                                                                                                                                                                    |\n|                | This Airworthiness Directive becomes effective on 13 March 2008.                                                                                                                                                                                                                                                                                |\n| Background:    | This Directive requires electrical bonding of the fill valves for the right and left main fuel tanks, the fill valve and pipe assembly for the centre wing fuel tank, and the defuel shutoff valve. This Directive results from a fuel system review conducted by the Boeing under United States Special Federal Aviation Regulation (SFAR) 88. |\n|                | The Directive is issued to prevent improper bonding of the fill valves and defuel shutoff valve for the main fuel tanks and centre wing tank, which, in combination with a lightning strike, could result in a fuel tank explosion and consequent loss of the aeroplane.                                                                        |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n29 January 2008","sortOrder":0},{"sectionNumber":"AD/B717/28","sectionType":"part","heading":"AD/B717/28","content":"## AD/B717/28","sortOrder":1},{"sectionNumber":"Electrical Bonding","sectionType":"part","heading":"Electrical Bonding","content":"## Electrical Bonding","sortOrder":2},{"sectionNumber":"3/2008","sectionType":"part","heading":"3/2008","content":"## 3/2008","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific technical issue (electrical bonding of fuel valves) identified through the SFAR 88 fuel system safety review. The scope remains tightly focused on its original purpose of preventing fuel tank explosions due to lightning strikes."},"complexity_factors":["Single, specific technical requirement with clear reference to external Boeing Service Bulletin","Limited applicability (only Boeing 717-200 model)","Simple compliance timeline (single deadline of 60 months)","Minimal conditional logic (only two grandfathering provisions for alternative compliance methods)","No defined terms section or extensive cross-referencing to other legislation","Short document (approximately 250 words of substantive content)"],"plain_english_summary":"This AD requires operators of Boeing 717‑200 aircraft to perform electrical bonding on fuel tank valves to prevent lightning‑induced sparks that could ignite fuel vapour and cause a fuel‑tank explosion.\n\nCompliance is mandatory within 60 months of 13 March 2008 by following Boeing Service Bulletin 717‑28‑0012 (Revision 1); work done to the earlier bulletin or to later FAA‑approved revisions also satisfies the requirement."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive stays within the original safety-focused scope: mandating electrical bonding for identified valves on the specified 717‑200 fleet to mitigate lightning-related ignition risk. It neither expands affected aircraft beyond the SB list nor adds unrelated obligations; it does allow acceptance of prior work and FAA‑approved later SB revisions as alternative compliance routes (Applicability; Requirement)."},"complexity_factors":["Narrow applicability — limited to Model 717‑200 aeroplanes identified in SB717‑28‑0012 (Applicability).","Technical maintenance action requiring certified maintenance personnel and parts for electrical bonding (Requirement; Background).","Compliance timing — single long window (60 months) to accomplish the work imposes scheduling considerations for operators (Compliance).","Cross-reference to external documents: Boeing Service Bulletin (original and Revision 1) and FAA AD 2008‑02‑08; later FAA‑approved SB revisions accepted as AMOCs, creating dependence on FAA approval decisions (Requirement).","Acceptance of prior work done under the 2004 SB simplifies compliance for some operators but requires record verification (Requirement).","Limited administrative discretion — CASA issues directive but defers technical AMOC decisions to FAA approvals, producing bilateral dependency (Requirement)."],"plain_english_summary":"This Airworthiness Directive requires operators of Boeing 717‑200 aeroplanes listed in Boeing Service Bulletin SB717‑28‑0012 to fit electrical bonding to specified main- and centre-tank fill valves and the defuel shutoff valve to reduce the risk of fuel‑tank ignition from lightning (Applicability; Requirement; Background). Operators/owners must arrange and pay for the work within 60 months; earlier work done to the 2004 SB or FAA‑approved later revisions is acceptable for compliance (Requirement; Compliance)."},"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-b717-28-electrical-bonding","history":"/api/acts/ad-b717-28-electrical-bonding/history","analysis":"/api/acts/ad-b717-28-electrical-bonding/analysis","conflicts":"/api/acts/ad-b717-28-electrical-bonding/conflicts","importantCases":"/api/acts/ad-b717-28-electrical-bonding/important-cases","documents":"/api/acts/ad-b717-28-electrical-bonding/documents"}}