{"id":"F2006L00725","name":"AD/B737/283 - Horizontal Stabiliser Hinge Outboard Fitting Attachment","slug":"ad-b737-283-horizontal-stabiliser-hinge-outboard-fitting-attachment","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136749,"registerId":"commonwealth-F2006L00725-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 737 Series Aeroplanes","sectionType":"division","heading":"Boeing 737 Series Aeroplanes","content":"### Boeing 737 Series Aeroplanes\n\n| AD/B737/283 | Horizontal Stabiliser HingeOutboard Fitting Attachment | 4/2006 |\n| ----------- | ------------------------------------------------------ | ------ |\n\n| Applicability: | All Model 737-100, -200, and 200C series aircraft, as listed in Boeing Service Bulletin (SB) 737-53-1048; without bolt replacement accomplished in accordance with Figure 1 of SB 737-53-1048, or later FAA approved revision.                                            |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 78-04-02Amdt 39-3267.                                                                                                                                                                                      |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of13 April 2006.                                                                                                                                                                                  |\n|                | This Airworthiness Directive becomes effective on 13 April 2006.                                                                                                                                                                                                          |\n| Background:    | This Directive requires inspection/check of all attach bolts of the two horizontal stabiliser hinge outboard fittings for security. Repeat inspection/checks are required until replacement of the bolts, which constitutes terminating action for the inspection/checks. |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n1 March 2006","sortOrder":0},{"sectionNumber":"AD/B737/283","sectionType":"part","heading":"AD/B737/283","content":"## AD/B737/283","sortOrder":1},{"sectionNumber":"Horizontal Stabiliser HingeOutboard Fitt","sectionType":"part","heading":"Horizontal Stabiliser HingeOutboard Fitting Attachment","content":"## Horizontal Stabiliser Hinge  \nOutboard Fitting Attachment","sortOrder":2},{"sectionNumber":"4/2006","sectionType":"part","heading":"4/2006","content":"## 4/2006","sortOrder":3}],"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 AD maintains its original narrow scope — addressing a specific mechanical inspection requirement for a defined subset of Boeing 737 aircraft. There is no evidence of scope creep; it remains a targeted safety directive for horizontal stabiliser bolt integrity."},"complexity_factors":["Very short document (under 300 words)","Only 3 defined applicability criteria (aircraft model, service bulletin reference, exclusion for already-completed work)","Single technical requirement referencing external FAA document rather than spelling out detailed procedures","Simple compliance structure: inspect repeatedly until replacement","No nested exceptions or conditional logic beyond the initial applicability exclusion","Minimal cross-referencing (only to Boeing Service Bulletin 737-53-1048 and FAA AD 78-04-02 Amdt 39-3267)"],"plain_english_summary":"This AD requires owners/operators of Boeing 737‑100/200/200C aircraft to inspect the outboard horizontal stabiliser hinge attachment bolts and continue repeat inspections until those bolts are replaced, after which inspections can stop. It’s a mandatory airworthiness action adopted from an FAA directive (effective in Australia 13 April 2006) to prevent stabiliser bolt failure that could compromise flight control."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope remains aligned with the FAA AD and the Boeing service bulletin: it applies only to the listed 737‑100, ‑200 and 200C aircraft that have not completed the bolt replacement per SB 737‑53‑1048, requires inspections until replacement, and adopts the FAA technical requirements with a revised effective date of 13 April 2006."},"complexity_factors":["Cross-reference to external instrument: requires action “in accordance with FAA AD 78-04-02Amdt 39-3267” (Requirement) which imports technical detail from another legal document.","Targeted applicability: limited to specific models and only aircraft that have not already done the bolt replacement per Boeing SB 737‑53‑1048 (Applicability), requiring operators to check maintenance records.","Repeated action until terminating event: mandates repeat inspections/checks until bolts are replaced (Background), creating ongoing compliance and tracking obligations.","Technical inspection requirement: safety-critical hardware inspection and eventual replacement involve aviation maintenance specialists and spare-parts logistics.","Regulatory enforcement and timing: revised effective/compliance date of 13 April 2006 sets a hard start for obligations (Compliance)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of specified Boeing 737‑100, ‑200 and 200C aircraft (those listed in Boeing SB 737‑53‑1048 that have not had the bolt replacement) to inspect and check the outboard horizontal stabiliser hinge attachment bolts for security, repeat those inspections as required by the referenced FAA AD, and replace the bolts as the terminating action. The AD enforces FAA AD 78‑04‑02Amdt 39‑3267 with a compliance effective date of 13 April 2006. Operators bear inspection and replacement costs; CASA enforces compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-283-horizontal-stabiliser-hinge-outboard-fitting-attachment","history":"/api/acts/ad-b737-283-horizontal-stabiliser-hinge-outboard-fitting-attachment/history","analysis":"/api/acts/ad-b737-283-horizontal-stabiliser-hinge-outboard-fitting-attachment/analysis","conflicts":"/api/acts/ad-b737-283-horizontal-stabiliser-hinge-outboard-fitting-attachment/conflicts","importantCases":"/api/acts/ad-b737-283-horizontal-stabiliser-hinge-outboard-fitting-attachment/important-cases","documents":"/api/acts/ad-b737-283-horizontal-stabiliser-hinge-outboard-fitting-attachment/documents"}}