{"id":"F2006L00727","name":"AD/B737/282 - Outboard Midflap Carriage Spindles","slug":"ad-b737-282-outboard-midflap-carriage-spindles","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136751,"registerId":"commonwealth-F2006L00727-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/B737/282 | Outboard Midflap Carriage Spindles | 4/2006 |\n| ----------- | ---------------------------------- | ------ |\n\n| Applicability: | Model 737-100, -200, and -200C series aircraft, without high gross weight flaps installed.                                                                                                                                                                                                                                                                                           |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2001-16-11Amdt 39-12380.Note: Boeing Alert Service Bulletin 737-57A1256 refers.                                                                                                                                                                                                                                       |\n| Compliance:    | Before 13 May 2006, unless already accomplished.                                                                                                                                                                                                                                                                                                                                     |\n|                | This Airworthiness Directive becomes effective on 13 April 2006.                                                                                                                                                                                                                                                                                                                     |\n| Background:    | This Directive requires inspection of the carriage spindles on the outboard midflap for circumferential score marks, and any necessary rework or replacement. The actions required by this Directive are intended to prevent severe flap asymmetry due to fractures of both carriage spindles at an outboard midflap, which could result in loss of controllability of the aircraft. |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n1 March 2006","sortOrder":0},{"sectionNumber":"AD/B737/282","sectionType":"part","heading":"AD/B737/282","content":"## AD/B737/282","sortOrder":1},{"sectionNumber":"Outboard Midflap Carriage Spindles","sectionType":"part","heading":"Outboard Midflap Carriage Spindles","content":"## Outboard Midflap Carriage Spindles","sortOrder":2},{"sectionNumber":"4/2006","sectionType":"part","heading":"4/2006","content":"## 4/2006","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-limited safety directive focused on a specific mechanical defect in specific aircraft models. It has not expanded beyond its original purpose of preventing spindle fractures."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined applicability criterion (specific aircraft models)","Single compliance deadline with one exception clause ('unless already accomplished')","No internal cross-references to other legislation sections","Technical requirements incorporated by reference to external FAA document rather than spelled out in text","No conditional logic or nested exceptions within the directive itself"],"plain_english_summary":"This AD mandates inspection of the outboard midflap carriage spindles on certain older Boeing 737-100/-200/-200C aeroplanes without high gross weight flaps for circular scratches or grooves, and repair or replacement if damage is found. It aims to prevent severe flap asymmetry that could cause loss of control. Compliance was required before 13 May 2006; the technical requirements mirror FAA AD 2001-16-11 and a Boeing service bulletin."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive implements an inspection-and‑repair requirement for specified 737 models to address spindle scoring and prevent flap asymmetry, consistent with the FAA AD it adopts. It does not expand or narrow the set of affected aircraft beyond the stated applicability or alter the substantive remedy set out in the referenced FAA/Boeing materials."},"complexity_factors":["Direct cross‑reference to an existing FAA AD (FA A AD 2001‑16‑11) and to Boeing Alert Service Bulletin 737‑57A1256, requiring readers to consult external technical materials","Limited applicability to specific models (737‑100, ‑200, ‑200C) without high gross weight flaps — an operational filter that affects which operators must act","Technical inspection requirement for a particular defect type (circumferential score marks) and possible follow‑on actions (rework or replacement), implying specialist maintenance skills and parts","Firm compliance deadline (must be done before 13 May 2006) and an effective date (13 April 2006) that constrain operator scheduling and maintenance planning","Safety consequence tied to dual spindle fractures (severe flap asymmetry / potential loss of controllability), raising the operational necessity but not specifying remediation costs or scheduling details"],"plain_english_summary":"This Airworthiness Directive requires operators of Boeing 737‑100, ‑200 and ‑200C aeroplanes without high gross weight flaps to inspect the outboard midflap carriage spindles for circumferential score marks and to rework or replace them as specified in FAA AD 2001‑16‑11 (Boeing Alert SB 737‑57A1256 referenced). Operators must complete the work by 13 May 2006; CASA enforces the requirement and operators meet the inspection and repair costs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-282-outboard-midflap-carriage-spindles","history":"/api/acts/ad-b737-282-outboard-midflap-carriage-spindles/history","analysis":"/api/acts/ad-b737-282-outboard-midflap-carriage-spindles/analysis","conflicts":"/api/acts/ad-b737-282-outboard-midflap-carriage-spindles/conflicts","importantCases":"/api/acts/ad-b737-282-outboard-midflap-carriage-spindles/important-cases","documents":"/api/acts/ad-b737-282-outboard-midflap-carriage-spindles/documents"}}