{"id":"F2006B04225","name":"AD/BEECH 90/34 Amdt 1 - Strobe Light Bonding Straps - Modification","slug":"ad-beech-90-34-amdt-1-strobe-light-bonding-straps-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43982,"registerId":"commonwealth-F2006B04225-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 90/34 Amdt 1 - Strobe Light Bonding Straps - 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)  Beechcraft 90 and 65-90 (King Air) Series Aeroplanes\n\n \n\nAD/BEECH 90/34\n\nAmdt 1\n\n\nStrobe Light Bonding Straps - Modification 1/75\n\n \n\nApplicability: All models C90, S/No. LJ-502 thru LJ-643, E90 S/No. LW-1 thru LW-117. Fitted with Grimes P.N 30-0467-1 or Grimes P/N 30-0467-3 Strobe Light Assemblies.\n\n \n\nDocument: Beechcraft SI No. 0655-362, Rev. 1.\n\n \n\nCompliance: Within 100 hours’ time in service after 31 January 1975.\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":2,"scope_assessment":{"changed":false,"description":"This is a narrow, technical airworthiness directive focused on a specific safety modification to a specific aircraft component. It has not expanded beyond its original purpose of addressing strobe light bonding strap deficiencies in specified Beechcraft models."},"complexity_factors":["Single, specific technical requirement with no conditional logic or exceptions","Only 4 defined applicability criteria (2 model types, serial number ranges, 2 part numbers)","Single compliance deadline with straightforward calculation (100 hours time-in-service from fixed date)","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998 citation","No nested definitions or interpretive provisions","Document is essentially a one-page safety bulletin format"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires specific repairs or modifications to aircraft.\n\n**What it does:**\nOrders owners and operators of certain Beechcraft King Air aeroplanes to modify the **strobe light bonding straps** (electrical grounding connections that prevent static electricity buildup on the aircraft's wingtip strobe lights).\n\n**Who it affects:**\n- Beechcraft C90 models with serial numbers LJ-502 through LJ-643\n- Beechcraft E90 models with serial numbers LW-1 through LW-117\n- Only aircraft fitted with specific Grimes strobe light part numbers (30-0467-1 or 30-0467-3)\n\n**Why it matters:**\nPoor electrical bonding on strobe lights can cause **electrical arcing** (sparks), which creates a fire risk or could interfere with the aircraft's electrical systems. This directive mandates a safety modification to prevent that hazard.\n\n**What must be done:**\nOperators must complete the modification described in **Beechcraft Service Instruction No. 0655-362, Revision 1** within **100 hours of flight time** after 31 January 1975.\n\n**Key point:** This is a **mandatory** safety requirement. Flying an affected aircraft without completing this modification would violate civil aviation regulations."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This instrument is labelled an amendment (Amdt 1) to AD/BEECH 90/34 and therefore alters the previously issued directive. The text supplied defines the current scope as: applicable to Beechcraft C90 and E90 aircraft with serial numbers LJ-502 thru LJ-643 and LW-1 thru LW-117 when fitted with Grimes P/N 30-0467-1 or 30-0467-3 strobe assemblies; requires modification per Beechcraft SI No. 0655-362, Rev. 1 within 100 hours’ time in service after 31 January 1975 (Applicability; Document; Compliance). The supplied text does not include the prior AD wording, so the precise differences from the original AD cannot be detailed here; the document itself sets the current operative scope as stated."},"complexity_factors":["Narrow technical scope limited to specific aircraft serial numbers and specific strobe light part numbers (Applicability)","Mandate relies on an external, technical manufacturer Service Instruction for the work details (Document)","Fixed and relatively short compliance window linked to aircraft time-in-service (Compliance)","Implementation requires qualified maintenance resources and parts availability (implied by Document and Applicability)","Regulatory enforcement is mandatory with limited in-text flexibility — any alternatives would require separate approval (Compliance)"],"plain_english_summary":"This AD requires a mandatory modification to the strobe light bonding straps on specific Beechcraft 90 and 65‑90 (King Air) aeroplanes that are fitted with Grimes strobe assemblies P/N 30‑0467‑1 or 30‑0467‑3, to be done per Beechcraft Service Instruction No. 0655‑362, Rev. 1 within 100 hours’ time‑in‑service after 31 January 1975.  \n\nIt affects the listed aircraft owners/operators and their maintenance providers; CASA enforces compliance and owners bear the costs and downtime."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-90-34-amdt-1-strobe-light-bonding-straps-modification","history":"/api/acts/ad-beech-90-34-amdt-1-strobe-light-bonding-straps-modification/history","analysis":"/api/acts/ad-beech-90-34-amdt-1-strobe-light-bonding-straps-modification/analysis","conflicts":"/api/acts/ad-beech-90-34-amdt-1-strobe-light-bonding-straps-modification/conflicts","importantCases":"/api/acts/ad-beech-90-34-amdt-1-strobe-light-bonding-straps-modification/important-cases","documents":"/api/acts/ad-beech-90-34-amdt-1-strobe-light-bonding-straps-modification/documents"}}