{"id":"F2006B03758","name":"AD/BEECH 23/44 - Stabilator Hinge Fastener Shearing","slug":"ad-beech-23-44-stabilator-hinge-fastener-shearing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43353,"registerId":"commonwealth-F2006B03758-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 23/44 - Stabilator Hinge Fastener Shearing","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) \nBeechcraft 19, 23 and 24 Series Aeroplanes\n\nAD/BEECH 23/44 Stabilator Hinge Fastener Shearing 4/87 DM\n\n```html\n

Applicability:

Models:

A23-19, 19A, M19A and B19

S/N MB-1

to MB-520

B19 Sport 150

S/N MB-521

to MB-905

23, A23, A23A, B23, C23

S/N M-1

to M-1361

C23 Sundowner 180

S/N M-1362

to M-2156, and

M-2158

to M-2392

A23-24, A24

S/N MA-1

to MA-368

A24R

S/N MC-2

to MC-95

A24R, B24R, C24R, Sierra 200

S/N MC-96

to MC-795

\n```\n\nRequirement: 1. Visually inspect the fasteners securing the stabilator hinge assemblies to the fuselage for looseness or failure in accordance with the requirements of the “Accomplishment Instructions” of Beech SB No 2182.\n\n2. If ANY fasteners are found loose or failed when conducting the inspection required in para 1, replace ALL fasteners securing both left and right hinge assemblies to the fuselage in accordance with Beech SB No 2182 prior to further flight.\n\nNote: FAA AD 87-02-08 refers.\n\nCompliance: Prior to further flight after 19 February 1987 and thereafter every 100 hours time in service for aircraft registered in the normal and utility category, and every 25 hours time in service for aircraft registered in the acrobatic category.\n\nBackground: There have been reports which show the fasteners used to secure the stabilator hinge assemblies to the fuselage were found to be in a sheared condition. In one case all but one fastener was found to have failed.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The document sets a focused airworthiness directive limited to listed Beechcraft models/serials requiring inspection and conditional replacement per Beech SB No. 2182, with specified initial and recurring intervals. The source text does not indicate any expansion or narrowing of that original scope."},"complexity_factors":["Model- and serial-number limited applicability: specific Beechcraft 19/23/24 series and serial ranges create administrative tracking (Applicability table).","Dual-step requirement: visual inspection duty and conditional mandatory replacement of all fasteners if any loose/failure found (Requirement paras 1–2).","Reference to external procedures: compliance depends on following Beech SB No. 2182 for the methods and parts (Requirement paras 1–2).","Different recurring intervals by registration category: every 100 hrs for normal/utility vs 25 hrs for acrobatic aircraft (Compliance).","Time-sensitive initial compliance: must be done prior to further flight after a specified date (19 Feb 1987) — creates immediate operational constraint (Compliance).","Safety-triggered replacement scope: finding a single failed fastener forces replacement of all hinge fasteners on both sides, raising parts/labour cost if failure is detected (Requirement para 2).","Cross-reference to FAA AD: regulatory alignment/precedent cited (Note)."],"plain_english_summary":"Requires a visual check of the stabilator hinge fasteners on specified Beechcraft 19/23/24 series aeroplanes and immediate replacement of all hinge fasteners on both sides if any are loose or have sheared, carried out per Beech Service Bulletin No. 2182. Applies to the listed models/serial ranges; initial inspection was required before further flight after 19 February 1987 with recurring checks every 100 flight hours (normal/utility) or 25 hours (acrobatic). Issued after reports of multiple fastener failures."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical failure mode in specific aircraft. It has not expanded beyond its original purpose of preventing stabilator hinge fastener failures."},"complexity_factors":["Single, clearly defined applicability table with specific model and serial number ranges (9 distinct model groups)","Two-tier compliance schedule based on aircraft registration category (normal/utility vs acrobatic)","Simple conditional logic: IF any fastener loose/failed THEN replace ALL fasteners on both sides","References external technical document (Beech SB No 2182) for detailed procedures","No defined terms section, no nested exceptions, no cross-references to other legislation beyond the parent Civil Aviation Regulations 1998","Straightforward background explaining the safety rationale"],"plain_english_summary":"This mandatory Airworthiness Directive requires owners/operators of specified Beechcraft 19/23/24 series (Musketeer/Sport/Sundowner/Sierra) to inspect the stabilator-to-fuselage fastener bolts and replace all bolts on both sides if any are loose or broken. Inspections recur every 100 flight hours for normal/utility-category aircraft and every 25 hours for acrobatic-category aircraft.\n\nIt responds to reports of bolt shearing that nearly caused total fastener failure and potential loss of pitch control, so compliance is required to prevent catastrophic accidents."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-23-44-stabilator-hinge-fastener-shearing","history":"/api/acts/ad-beech-23-44-stabilator-hinge-fastener-shearing/history","analysis":"/api/acts/ad-beech-23-44-stabilator-hinge-fastener-shearing/analysis","conflicts":"/api/acts/ad-beech-23-44-stabilator-hinge-fastener-shearing/conflicts","importantCases":"/api/acts/ad-beech-23-44-stabilator-hinge-fastener-shearing/important-cases","documents":"/api/acts/ad-beech-23-44-stabilator-hinge-fastener-shearing/documents"}}