{"id":"F2006B05667","name":"AD/PA-30/25 Amdt 3 - Stabilator Torque Tube Bearing Block Attachment Fitting","slug":"ad-pa-30-25-amdt-3-stabilator-torque-tube-bearing-block-attachment-fitting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135391,"registerId":"commonwealth-F2006B05667-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-30/25 Amdt 3 - Stabilator Torque Tube Bearing Block Attachment Fitting","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)  \nPiper PA-30 & 39 (Twin Comanche) Series Aeroplanes\n\nAD/PA-30/25\n\nAmdt 3\n\n  \n\nStabilator Torque Tube Bearing Block Attachment Fitting\n\n  \n10/94\n\nApplicability: Model PA30 S/No’s 30-1 through 30-2000 and PA39 S/No’s 39-1 through 39-155.\n\nRequirement: 1. Inspect the stabilator torque tube bearing support fittings for looseness by accomplishing the following:\n\n    Remove the tailcone and rear aft fuselage access door.\n\n    b. Grasp the stabilator tip and exert a fore and aft force and then an up and down force.\n\n    c. If looseness is found during the inspection specified above, incorporate Piper Part No. 760 835 (Hi-Shear Rivet Replacement Kit) on the affected fitting.\n\n    d. Reinstall the tailcone and right rear aft fuselage access door.\n\n2. Reinspect all stabilator torque tube bearing support fittings on which Piper Kit Part No 760 835 has not been incorporated; in accordance with Requirement 1 of this Directive\n\nNote 1: Incorporating Piper Kit Part No. 760 835 on all four stabilator torque tube bearing support fittings constitutes terminating action for the inspection requirements of this Directive.\n\nNote 2: FAA AD 94-13-10 Amdt 39-8951 and Piper SB 411A refer.\n\nCompliance: 1. Within 100 hours time in service after 15 September 1994, unless Piper Kit Part No. 760 835 is incorporated on all four stabilator torque tube bearing support fittings.\n\n2. At intervals not to exceed 100 hours time in service, until Piper Kit Part No. 760 835 is incorporated on all four stabilator torque tube bearing support fittings. The compliance of the previous issue of this Directive was “at intervals not exceeding 300 hours time in service”. This amendment is effective from 15 September 1994.\n\nBackground: Incidents of looseness of the stabilator torque tube bearing support fittings prompted the issue of this Directive. The actions specified are intended to prevent the loss of pitch control because of looseness of the fittings.\n\nAmendment 3 is issued to align this Directive with the issue of a new FAA AD which specifies reinspection and terminating action criteria.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the directive. Amendment 3 simply tightens the reinspection interval from 300 hours to 100 hours and aligns the Australian directive with the corresponding US FAA directive. The core purpose — preventing loss of pitch control due to loose stabilator fittings — remains unchanged."},"complexity_factors":["Single, clearly defined applicability (specific aircraft models and serial numbers)","Straightforward two-step requirement structure (initial inspection + reinspection)","Only one defined technical term requiring explanation (stabilator)","Minimal cross-references (two external documents in notes only)","Clear terminating action specified (installation of repair kit on all four fittings)","Simple compliance timeline (100 hours time in service)","No nested exceptions or conditional logic beyond the basic if-then structure"],"plain_english_summary":"This CASA Airworthiness Directive applies to Piper PA‑30 and PA‑39 Twin Comanche twin‑engine aircraft and mandates inspection of the stabilator torque‑tube bearing support fittings. It requires regular checks until a specified repair kit is fitted to all fittings, addressing reported looseness that can lead to loss of pitch control. The amendment aligns Australian requirements with a corresponding FAA safety directive."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Amendment 3 tightens inspection frequency (previously 'at intervals not exceeding 300 hours' now 100 hours) and adopts a clear terminating action (installation of Piper Kit Part No. 760 835 on all four fittings). The amendment explicitly aligns the Directive with a new FAA AD and its reinspection/termination criteria and is effective from 15 September 1994. (Compliance; Note 1; Background)."},"complexity_factors":["Multiple procedural steps required for inspection (remove tailcone and access door; fore/aft and up/down force on stabilator) — (Requirement 1a–1b).","Conditional hardware replacement per affected fitting (fit Piper Part No. 760 835 when looseness is found) — (Requirement 1c).","Repeating reinspection obligation at fixed flight‑hour intervals until a terminating action is completed (100‑hour intervals) — (Requirement 2; Compliance).","Termination mechanic tied to complete installation on all four fittings (installing kit on all four constitutes terminating action) — (Note 1).","Narrow applicability to specific models and serial numbers increases administrative tracking (Applicability).","Change from previous 300‑hour interval to 100‑hour interval increases inspection frequency and compliance burden (Compliance; Background).","Reference to FAA AD and Piper SB implies coordination with external airworthiness material (Note 2).","Practical skill and parts availability required to fit hi‑shear rivet replacement kit (Requirement 1c; Note 1)."],"plain_english_summary":"This Directive requires owners/operators of Piper PA‑30 and PA‑39 aircraft (specified serial numbers) to inspect stabilator torque‑tube bearing support fittings for looseness, removing the tailcone and rear access door and manipulating the stabilator. If looseness is found they must fit Piper Kit Part No. 760 835; inspections are due within 100 hours TIS after 15 Sep 1994 and every 100 hours until the kit is fitted to all four fittings, which terminates the inspections. (Requirement; Compliance; Note 1)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-30-25-amdt-3-stabilator-torque-tube-bearing-block-attachment-fitting","history":"/api/acts/ad-pa-30-25-amdt-3-stabilator-torque-tube-bearing-block-attachment-fitting/history","analysis":"/api/acts/ad-pa-30-25-amdt-3-stabilator-torque-tube-bearing-block-attachment-fitting/analysis","conflicts":"/api/acts/ad-pa-30-25-amdt-3-stabilator-torque-tube-bearing-block-attachment-fitting/conflicts","importantCases":"/api/acts/ad-pa-30-25-amdt-3-stabilator-torque-tube-bearing-block-attachment-fitting/important-cases","documents":"/api/acts/ad-pa-30-25-amdt-3-stabilator-torque-tube-bearing-block-attachment-fitting/documents"}}