{"id":"F2006B02579","name":"AD/AVID/1 - Wing Structural Integrity","slug":"ad-avid-1-wing-structural-integrity","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41835,"registerId":"commonwealth-F2006B02579-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AVID/1 - Wing Structural Integrity","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nAvid Flyer Series Aeroplanes\n\nAD/AVID/1 Wing Structural Integrity 12/91\n\nApplicability: All models.\n\nRequirement: Carry out an inspection to ascertain structural integrity of the bonding of wing ribs to front tubular spar, using the following method:\n\nRemove wing tips.\n\nGrasp wing structure at tip with one hand at leading edge and other as far aft as possible, and whilst applying a reasonable torsional load, have an observer noting any abnormal wrinkling of wing fabric covering, between, and at all wing rib stations.\n\nRepeat torsional load in opposite direction and further observe.\n\nAny abnormal wrinkling is to be investigated by removal of fabric from suspect area, before further flight.\n\nNote: The use of a more positive method for attachment of wing ribs to front spar tube, to a scheme approved by the Authority, would be considered terminating action for this Directive.\n\nCompliance: Prior to exceeding 100 hours time in service or 1 year since building, whichever occurs first, and thereafter at intervals not exceeding 100 hours time in service or 12 calendar months whichever occurs first.\n\nBackground: Doubt exists as to the durability of the bonding of wing ribs to front spar tube.\n\ns","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted airworthiness directive focused specifically on wing rib bonding in Avid Flyer aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific mechanical inspection procedure described in plain language","Only 2 defined terms implicitly used ('time in service' and 'Authority')","No cross-references to other legislation or complex conditional logic","Simple compliance timeline (100 hours/12 months, whichever first)","Single terminating action described (alternative attachment method)","Total length is approximately 200 words"],"plain_english_summary":"This AD requires owners/operators of all Avid Flyer models to perform regular torsion checks of the wings to detect potential poor bonding of wing ribs to the front spar. If fabric wrinkling indicates loose joints, the fabric must be removed and the area inspected before further flight.\n\nChecks are required before 100 flight hours or one year, and thereafter every 100 hours or 12 months, unless a CASA‑approved mechanical attachment is fitted to eliminate the need for inspections."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive's text shows no alteration of scope from its stated purpose: it targets bonding integrity of wing ribs to the front spar on all Avid Flyer models. No amendments or expanded coverage are indicated in the instrument."},"complexity_factors":["Subjective inspection method: terms like 'reasonable torsional load' and 'abnormal wrinkling' leave judgment to the inspector/operator, increasing interpretative variability.","Physical investigation requirement: removal of fabric from suspect areas may involve structural work and repair costs before flight.","Recurring compliance schedule: initial compliance 'prior to exceeding 100 hours or 1 year since building' then every 100 hours or 12 months imposes ongoing maintenance planning.","Applicability to all models: broad coverage increases the number of affected aircraft and owners.","Regulator discretion for terminating action: an alternative 'more positive method' must be 'approved by the Authority', introducing administrative approval processes.","Safety-driven enforcement: background cites durability doubts, meaning failure to comply has direct airworthiness consequences and may ground aircraft until remedied."],"plain_english_summary":"This Airworthiness Directive requires Avid Flyer owners/builders to inspect the bond between wing ribs and the front tubular spar by applying torsional loads at the wing tip and checking for abnormal fabric wrinkling; any suspect area must have the fabric removed and be inspected before further flight. Inspections are required before 100 flight hours or one year after building, and then every 100 hours or 12 months. Owners pay for inspections and repairs; the Civil Aviation Safety Authority can approve a stronger rib attachment as a terminating action."}},"importantCases":[],"_links":{"self":"/api/acts/ad-avid-1-wing-structural-integrity","history":"/api/acts/ad-avid-1-wing-structural-integrity/history","analysis":"/api/acts/ad-avid-1-wing-structural-integrity/analysis","conflicts":"/api/acts/ad-avid-1-wing-structural-integrity/conflicts","importantCases":"/api/acts/ad-avid-1-wing-structural-integrity/important-cases","documents":"/api/acts/ad-avid-1-wing-structural-integrity/documents"}}