{"id":"F2006B02880","name":"AD/B737/177 - Rudder Pedal Housing","slug":"ad-b737-177-rudder-pedal-housing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42222,"registerId":"commonwealth-F2006B02880-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nBoeing 737 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/B737/177 Rudder Pedal Housing 5/2002","sectionType":"part","heading":"AD/B737/177 Rudder Pedal Housing 5/2002","content":"# AD/B737/177 Rudder Pedal Housing 5/2002\n\nApplicability: Model 737-600, \\-700, \\-700C, and –800 series aircraft, with line numbers 1 through 295.\n\nRequirement: Inspect in accordance with the technical requirements of FAA AD 2002-04-08 Amdt 39-12665.\n\nNote: Boeing Service Bulletin 737-25A1383 Revision 1 refers.\n\nCompliance: As specified in the Requirement document, with a revised effective date of 16 May 2002.\n\nThis Airworthiness Directive becomes effective on 16 May 2002.\n\nBackground: The FAA requires inspection of certain fasteners of the rudder pedal housings, and replacement of existing fasteners with improved fasteners, if necessary. These actions are intended to prevent loss of free movement of the rudder pedals, and reduced controllability of the aircraft.\n\n![Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 22 March 2002\n\n![](image.001.png)","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD does not broaden scope beyond its original safety-focused purpose. It aligns CASA's requirement with the FAA's directive and points to Boeing's service bulletin for technical specifics. The measure is narrowly targeted (specific models and line numbers) and limited to inspection and replacement of rudder pedal housing fasteners to correct a defined unsafe condition."},"complexity_factors":["Single, narrow applicability: four 737 models limited to line numbers 1–295","Requirement that delegates technical detail to one external FAA AD (FAA AD 2002-04-08)","Reference to one manufacturer service bulletin (Boeing SB 737-25A1383 Rev 1) as a related document","Simple compliance clause with a single revised effective date (16 May 2002)","Short document length with no nested exceptions, no multiple compliance paths, and no penalty or certification complexity","Legal basis stated (issued under subregulation 39.1(1) of CAR 1998), but operational specifics are contained in external documents"],"plain_english_summary":"**What this directive does**\n\n- This Airworthiness Directive (AD) requires operators of certain Boeing 737 aeroplanes to inspect the fasteners on the rudder pedal housing and replace any fasteners that are not acceptable.\n\n**Which aircraft are affected**\n\n- Model 737-600, -700, -700C and -800 series aeroplanes, specifically those with line numbers 1 through 295. (See \"Applicability\".)\n\n**What you must do and when**\n\n- The AD tells operators to carry out the inspection and any necessary replacements in accordance with the technical instructions set out in FAA AD 2002-04-08 (the American Federal Aviation Administration directive). The AD also notes Boeing Service Bulletin 737-25A1383 Revision 1 as a related technical document. (See \"Requirement\" and \"Note\".)\n- The AD becomes effective 16 May 2002; compliance timing is governed by the referenced FAA AD. (See \"Compliance\".)\n\n**Why the action is required**\n\n- The background states that some fasteners in the rudder pedal housing can lead to a loss of free movement of the rudder pedals. That loss could reduce the pilot's ability to control the aircraft. The inspection and replacement requirement is intended to correct that unsafe condition. (See \"Background\".)\n\n**Who pays and who decides**\n\n- Aircraft operators (airlines, lessors, or private owners) bear the cost of inspection, parts and labour to comply. That includes any costs from aircraft downtime while the work is done. (Implication of the Requirement and Compliance clauses.)\n- The Civil Aviation Safety Authority (CASA) delegate issued the AD under subregulation 39.1(1) of CAR 1998; the AD delegates the technical method and detailed steps to the FAA AD and the Boeing service bulletin. (See opening paragraph and Requirement/Note.)\n\n**Practical mechanics and effects on behaviour**\n\n- Operators must: arrange for the specified inspection, evaluate the condition of fasteners, and replace any fasteners that fail inspection using the methods and parts specified in the FAA AD / Boeing service bulletin.\n- Operators will need to schedule maintenance slots and procure approved replacement fasteners where required. That creates direct operating costs (labour, parts) and indirect costs (aircraft out of service).\n\n**Implementation risks and trade-offs**\n\n- The AD relies on a foreign regulator's (FAA) technical directive and a Boeing service bulletin for the detailed technical steps. This reduces CASA's need to restate technical detail but creates dependency on those external documents for compliance specifics. (See \"Requirement\" and \"Note\".)\n- Costs are concentrated on operators of the affected line-numbered aircraft; benefits (reduced risk of control loss) are diffuse and safety-related.\n- Compliance imposes immediate operational and financial costs: inspection manpower, replacement parts, and potential aircraft downtime. The AD does not itself set a compensation mechanism; operators must absorb these costs or pass them along under commercial contracts.\n\n**Summary sentence**\n\n- The AD mandates inspection and corrective replacement of rudder-pedal-housing fasteners on specified early-production 737-600/700/700C/800 aeroplanes to address a risk of restricted rudder pedal movement, using the FAA AD and Boeing service bulletin as the technical instructions for how and when the work must be done."},"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":3,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive focused on a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of addressing unsafe rudder pedal fasteners in early-production 737 Next Generation aircraft."},"complexity_factors":["Short document (under 500 words) with clear structure","Only 4 defined applicability criteria (specific aircraft models and line numbers)","Single technical requirement that cross-references an external FAA document rather than reproducing detailed instructions","No nested exceptions or conditional logic within the directive itself","Compliance date references external document but includes specific effective date override","Minimal legislative cross-referencing (only mentions CAR 1998 subregulation 39.1(1) as enabling power)"],"plain_english_summary":"This is a safety order (called an \"Airworthiness Directive\") issued by Australia's aviation safety regulator (CASA) that applies to specific Boeing 737 aircraft models. It requires airlines and aircraft operators to inspect the rudder pedal housings—the floor-mounted units where pilots place their feet to control the aircraft's rudder. Specifically, mechanics must check certain bolts/fasteners in those housings and replace them with improved versions if needed. This prevents the pedals from jamming or sticking, which could make the aircraft harder to control. The directive applies to Boeing 737-600, -700, -700C, and -800 series planes with specific production line numbers (1 through 295). Operators must follow the technical instructions from a US Federal Aviation Administration (FAA) safety order (AD 2002-04-08) and a Boeing service bulletin. The deadline for compliance is set out in that FAA document, with this Australian directive taking effect on 16 May 2002."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-177-rudder-pedal-housing","history":"/api/acts/ad-b737-177-rudder-pedal-housing/history","analysis":"/api/acts/ad-b737-177-rudder-pedal-housing/analysis","conflicts":"/api/acts/ad-b737-177-rudder-pedal-housing/conflicts","importantCases":"/api/acts/ad-b737-177-rudder-pedal-housing/important-cases","documents":"/api/acts/ad-b737-177-rudder-pedal-housing/documents"}}