{"id":"F2006B04618","name":"AD/BELL 222/3 - Tail Boom - Inspection and Modification","slug":"ad-bell-222-3-tail-boom-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44370,"registerId":"commonwealth-F2006B04618-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 222/3 - Tail Boom - Inspection and Modification","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)  \nBell Helicopter Textron Canada (BHTC) 222 Series Helicopters\n\nAD/BELL 222/3 Tail Boom \\- Inspection and Modification 6/85\n\nTX\n\nApplicability: 1. All model 222U helicopters with Serial Numbers 47501 to 47532 and 47534 to 47536.\n\n2. All model 222B helicopters with Serial Numbers 47131 to 47143\\. Requirement: 1. Model 222U: Bell Alert Service Bulletin No 222U-85-3.\n\n2. Model 222B: Bell Alert Service Bulletin No. 222-85-28.\n\nCompliance: Inspect within 10 hours time in service after 3 May 1985, and thereafter at intervals not exceeding 25 hours time in service.\n\nModify in accordance with Part III of applicable requirement document.\n\nNote: Accomplishment of Parts II or III of the applicable requirement document constitutes termination action for the requirements of this AD.\n\nBackground: Two cases of skin cracks in the tailboom have been reported. In one case the skin cracks extended through the upper flange of one supporting longeron.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2125},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive remains focused on its original specific purpose: addressing tail boom cracking in defined Bell 222 helicopter models. No expansion beyond the original safety issue is evident."},"complexity_factors":["Single-purpose directive with straightforward inspection and modification requirements","External incorporation of technical documents (Bell Alert Service Bulletins) by reference without reproducing their content","Simple conditional logic for termination (modification completion ends inspection obligations)","Narrow applicability limited to specific aircraft models and serial numbers"],"plain_english_summary":"This mandatory Airworthiness Directive requires owners of specified Bell 222 and 222U helicopters to inspect the tail boom for cracking within 10 flight hours (from 3 May 1985) and every 25 hours thereafter, until a permanent modification is performed per Bell Alert Service Bulletins. It applies to the listed serial-numbered aircraft and terminates the inspection requirement once the modification is correctly completed.\n\nThe AD responds to discovered tail-boom skin cracks — one severe case damaged a longeron — to prevent tail-boom failure and possible crash."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-222-3-tail-boom-inspection-and-modification","history":"/api/acts/ad-bell-222-3-tail-boom-inspection-and-modification/history","analysis":"/api/acts/ad-bell-222-3-tail-boom-inspection-and-modification/analysis","conflicts":"/api/acts/ad-bell-222-3-tail-boom-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-bell-222-3-tail-boom-inspection-and-modification/important-cases","documents":"/api/acts/ad-bell-222-3-tail-boom-inspection-and-modification/documents"}}