{"id":"F2006B11310","name":"AD/MSR/10 - Firewall Sealing - Modification","slug":"ad-msr-10-firewall-sealing-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57155,"registerId":"commonwealth-F2006B11310-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MSR/10 - Firewall Sealing - Modification","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Aerospatiale Rallye Series Aeroplanes\n\n \n\nAD/MSR/10 Firewall Sealing - Modification 10/70\n\nApplicability: All models 880B, 885, 893A and 894A.\n\n \n\nRequirement: 1. Replace the existing firewall sealant with a fireproof sealant; or 2. FAA AD 70-17-6.\n\nCompliance: Within 100 hours time in service after 30 October 1970.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive from 1970 addressing a specific fire safety defect in specific aircraft models. It has not expanded beyond its original narrow technical purpose."},"complexity_factors":["Extremely short document (approximately 150 words)","No defined terms section","No cross-references to other legislation (except optional reference to FAA AD 70-17-6)","Simple binary compliance option (do X, or alternatively do Y)","Single, clear applicability clause","No conditional logic, exceptions, or nested provisions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain **Aerospatiale Rallye series aeroplanes** (models 880B, 885, 893A and 894A) to fix a fire safety problem. The aircraft's original firewall sealant (the material that seals gaps in the fireproof wall between the engine and the cabin) must be replaced with a proper **fireproof sealant**, or alternatively, operators can comply with an equivalent American safety order (FAA AD 70-17-6).\n\n**Who it affects:**\nAnyone who owns, operates, or maintains these specific Rallye aircraft models in Australia.\n\n**Why it matters:**\nFirewalls are critical safety barriers. If the sealant isn't fireproof, fire or toxic fumes from an engine fire could leak into the cockpit, endangering crew and passengers. This directive ensures these older aircraft meet proper fire safety standards.\n\n**Compliance deadline:**\nThe work had to be done within **100 hours of flying time** after 30 October 1970."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The text sets a targeted technical requirement for specific Aerospatiale Rallye models to use fireproof firewall sealant (or follow FAA AD 70-17-6) within a defined time window. There is no indication in the supplied text that the directive expands beyond that original, narrowly focused requirement."},"complexity_factors":["Narrow applicability to four specific aircraft models (Applicability).","Single, straightforward technical action required (replace sealant) with an explicit deadline (Requirement; Compliance).","Alternative compliance route references an external FAA AD, creating a dependency on another document for full implementation details (Requirement).","The directive text does not specify approved sealant products or installation procedure, requiring implementers to seek additional sources for technical detail (Requirement).","Historical timing reference (100 hours after 30 October 1970) could create interpretive or record-keeping questions for operators with long-term maintenance logs (Compliance)."],"plain_english_summary":"This directive requires owners/operators of Aerospatiale Rallye 880B, 885, 893A and 894A aeroplanes to replace the engine-firewall sealant with a fireproof sealant (or comply with FAA AD 70-17-6) within 100 hours time-in-service after 30 October 1970. It’s a one‑time regulatory maintenance mandate that creates a short-term cost and scheduling burden for affected operators to eliminate a fire-safety risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-msr-10-firewall-sealing-modification","history":"/api/acts/ad-msr-10-firewall-sealing-modification/history","analysis":"/api/acts/ad-msr-10-firewall-sealing-modification/analysis","conflicts":"/api/acts/ad-msr-10-firewall-sealing-modification/conflicts","importantCases":"/api/acts/ad-msr-10-firewall-sealing-modification/important-cases","documents":"/api/acts/ad-msr-10-firewall-sealing-modification/documents"}}