{"id":"F2006B06252","name":"AD/PITTS S-2/7 - Control Tube Assembly - Inspection and Modification","slug":"ad-pitts-s-2-7-control-tube-assembly-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47230,"registerId":"commonwealth-F2006B06252-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PITTS S-2/7 - Control Tube Assembly - 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)  \nPitts S-1 and S-2 Series Aeroplanes\n\nAD/PITTS S-2/7 Control Tube Assembly \\- Inspection\n\nand Modification\n\n  \n6/75\n\nApplicability: All model S-2A.\n\nRequirement: 1. Visually inspect the Control Tube Assembly P/No. 2-5100 for cracks at the junction of the control stick housing at the aft end of the tube where it is welded to the control tube.\n\nNote: Remove paint from the inspection area and leave unpainted until modified.\n\n    2. Modify Control Tube Assembly P/No. 2-5100 in accordance with Pitts Aviation Enterprises Service Letter No. 5.\n\n    3. The repetitive inspection detailed in this Directive shall be entered on the maintenance release as maintenance required. The inspection may be performed by the pilot in command, in which case certification is not required. In all other cases certification may be made on the maintenance release. This inspection may also be performed and certified by any Licensed Aircraft Maintenance Engineer.\n\nCompliance: For Para. 1 \\- Inspect before each flight after 21 May 1975 until modified. For Para. 2 \\- Modify within 100 hours time in service after 21 May 1975.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted safety directive addressing a specific mechanical defect in a specific aircraft model. It has not expanded beyond its original purpose of ensuring control tube integrity in Pitts S-2A aeroplanes."},"complexity_factors":["Single, specific aircraft model (Pitts S-2A) and single part number (2-5100)","Only 3 requirements with clear, sequential numbering","No defined terms section or interpretation provisions","Single cross-reference to external document (manufacturer's Service Letter No. 5)","Simple conditional logic: inspection required 'until modified', with clear time-based compliance deadlines","Total length: approximately 200 words"],"plain_english_summary":"This AD requires owners/operators of Pitts S‑2A aeroplanes to guard against cracking at the control‑stick tube weld by removing paint from the area, visually inspecting it before each flight, recording the checks on the maintenance release, and completing a mandated modification per the manufacturer’s service letter within 100 flight hours of the compliance date. It targets a known structural defect that could cause loss of control; pilots may perform the visual checks themselves or have a licensed maintenance engineer sign off."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument's stated scope is self-contained: it applies to all Pitts S‑2A aeroplanes and prescribes inspection and modification of a specified part. The directive does not indicate any expansion or narrowing of that applicability beyond what it specifies."},"complexity_factors":["Narrow applicability: applies only to Pitts S‑2A model (Applicability).","Repetitive operational burden: visual inspection required before every flight until modification (Requirement Para.1; Compliance).","Immediate modification deadline: modification required within 100 hours time in service (Requirement Para.2; Compliance).","Prescriptive inspection detail: remove paint and leave area unpainted until modified (Requirement Para.1 Note).","Dependency on external document: modification must follow Pitts Aviation Enterprises Service Letter No. 5 (Requirement Para.2).","Record-keeping and certification options: inspection must be entered on maintenance release; pilot‑in‑command may perform without certification, others must certify or use a Licensed AME (Requirement Para.3).","Specific part reference: targets Control Tube Assembly P/No. 2-5100 (Requirement)."],"plain_english_summary":"This airworthiness directive requires owners/operators of Pitts S‑2A aeroplanes to inspect a specific control tube assembly for cracks before each flight until it is modified, and to complete a prescribed modification within 100 hours. Inspections must be entered on the maintenance release; a pilot‑in‑command may perform the inspection without certification, while other inspections or certifications may be made by a Licensed Aircraft Maintenance Engineer."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pitts-s-2-7-control-tube-assembly-inspection-and-modification","history":"/api/acts/ad-pitts-s-2-7-control-tube-assembly-inspection-and-modification/history","analysis":"/api/acts/ad-pitts-s-2-7-control-tube-assembly-inspection-and-modification/analysis","conflicts":"/api/acts/ad-pitts-s-2-7-control-tube-assembly-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-pitts-s-2-7-control-tube-assembly-inspection-and-modification/important-cases","documents":"/api/acts/ad-pitts-s-2-7-control-tube-assembly-inspection-and-modification/documents"}}