{"id":"F2008L04307","name":"AD/B747/384 Amdt 1 - Number 3 Main Entry Doors","slug":"ad-b747-384-amdt-1-number-3-main-entry-doors","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76298,"registerId":"commonwealth-F2008L04307-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 747 Series Aeroplanes","sectionType":"division","heading":"Boeing 747 Series Aeroplanes","content":"### Boeing 747 Series Aeroplanes\n\n| AD/B747/384 Amdt 1 | Number 3 Main Entry Doors | 13/2008 DM |\n| ------------------ | ------------------------- | ---------- |\n\n| Applicability: | All Boeing Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C,747-300, 747-400, 747-400D, and 747SR series airplanes with line numbers 1 through 1381.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2008-18-07 Amdt 39-15664.Accomplishment of the applicable repair required by this directive constitutes compliance with the repair of the lower forward door casting (reveal) of the number 3 Main Entry Door only as required by AD/B747/170 Amdt 1 or later approved CASA revision.Note: Boeing Special Attention Service Bulletin 747-53-2460 Revision 1, dated February 13, 2007 or later FAA approved revision refers.                                                                                                                                                                             |\n| Compliance:    | As specified in the requirement document with a revised effective date of12 November 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n|                | This Amendment becomes effective on 12 November 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |\n| Background:    | The FAA have received reports of cracking and/or a sharp edge in the lower forward corner reveal of the number 3 Main Entry Door (MED). This directive is issued to detect and correct fatigue cracking of the lower forward corner reveal of the number 3 MEDs, which could lead to the door escape slide departing the airplane when the door is opened and the slide is deployed, and consequent injuries to passengers and crew using the door escape slide during an emergency evacuation.This directive involves inspections and corrective action if necessary. For certain other airplanes replacement is an optional action for the material type inspection. |\n\n|     | Amendment 1 changes the Applicability to that required in Boeing Special Attention Service Bulletin 747-53-2460 Revision 1. |\n| --- | --------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n7 November 2008","sortOrder":0},{"sectionNumber":"AD/B747/384 Amdt 1","sectionType":"part","heading":"AD/B747/384 Amdt 1","content":"## AD/B747/384 Amdt 1","sortOrder":1},{"sectionNumber":"Number 3 Main Entry Doors","sectionType":"part","heading":"Number 3 Main Entry Doors","content":"## Number 3 Main Entry Doors","sortOrder":2},{"sectionNumber":"13/2008 DM","sectionType":"part","heading":"13/2008 DM","content":"## 13/2008 DM","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the directive. The only change is a technical update to the applicability section to align with Boeing's revised service bulletin, ensuring the correct aircraft are captured. The core purpose — addressing door frame cracking to prevent escape slide failure — remains unchanged."},"complexity_factors":["Short, single-purpose directive (approximately 300 words)","Only 3 substantive sections: Applicability, Requirement, and Background","Heavy reliance on external documents (FAA AD 2008-18-07 and Boeing Service Bulletin 747-53-2460) without reproducing their contents","Single cross-reference to prior Australian directive AD/B747/170 Amdt 1","Simple conditional logic: inspect, then repair if necessary; optional replacement for certain aircraft","No defined terms section — technical terms (MED, reveal, line numbers) used without glossary"],"plain_english_summary":"This airworthiness directive requires operators of most older Boeing 747s (line numbers 1–1381; 747‑100/200/300/400/400D/SR series) to inspect and repair the lower forward corner of the Number 3 main entry door frame where cracking/sharp edges could let the emergency escape slide detach during deployment. Amendment 1 revises which aircraft are covered to match Boeing guidance. Compliance is required by 12 November 2008."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 altered the AD's Applicability to align with the requirements in Boeing Special Attention Service Bulletin 747-53-2460 Revision 1. That change modifies which specific aircraft (models/line numbers/material conditions) are covered compared with the earlier wording of the AD, so the directive's covered population and therefore its compliance obligations were changed from the original text."},"complexity_factors":["Single-subject AD focused on one component (number 3 MED lower forward reveal)","Relies on external documents: FAA AD 2008-18-07 and Boeing SB 747-53-2460 Revision 1 (or later FAA-approved revisions)","Applicability spans multiple 747 models and a range of line numbers (1–1381)","Cross-reference to compliance with another AD (AD/B747/170 Amdt 1) but limited to one specific repair (lower forward door casting)","Amendment modifies applicability to align with the Boeing service bulletin","Some conditionality in the service bulletin (replacement optional for certain airplanes)"],"plain_english_summary":"**What this directive does (mechanically)**\n\n- This Airworthiness Directive (AD) requires operators of many Boeing 747 series aeroplanes (line numbers 1–1381) to follow the inspection and corrective-action steps set out in FAA AD 2008-18-07 and Boeing Special Attention Service Bulletin 747-53-2460 Revision 1 (or any later FAA‑approved revisions).  The work focuses on the lower forward corner \"reveal\" (casting) of the number 3 Main Entry Door (MED).\n\n**Who is affected**\n\n- Aircraft owners and operators of the listed Boeing 747 models with line numbers 1 through 1381.\n- Maintenance organisations and authorised repair stations that perform inspections and corrective work on those doors.\n\n**What operators must do**\n\n- Inspect the lower forward corner reveal of the number 3 MED for cracking or sharp edges, in accordance with the referenced FAA AD and Boeing service bulletin.\n- Carry out any corrective actions (repairs or replacements) required by those documents.\n- For the particular repair of the lower forward door casting (the reveal) the AD states that completing the applicable repair counts as compliance with the same repair requirement in AD/B747/170 Amdt 1 (but only for that specific casting).\n- The directive became effective 12 November 2008; compliance timing and detailed procedures are those specified in the FAA AD/service bulletin.\n\n**Why it matters (safety rationale and mechanical effects)**\n\n- The FAA received reports of cracking and/or formation of a sharp edge in the lower forward corner reveal of the number 3 MED. If unnoticed, fatigue cracking could allow the escape slide to separate from the aeroplane when the door is opened and the slide is deployed, risking injury during an emergency evacuation.\n- The mandatory inspections and corrective actions are intended to detect and fix such cracking before it leads to slide departure.\n\n**Who pays and who decides**\n\n- Aircraft operators/owners pay for the inspections, repairs, parts, and aircraft downtime. Maintenance organisations perform and certify the work.\n- The Civil Aviation Safety Authority (CASA) enforces the AD in Australia by mandating compliance with the FAA AD and Boeing service bulletin; the FAA AD and Boeing SB set the technical steps.\n\n**Costs, incentives and trade-offs (practical considerations)**\n\n- Direct costs: inspection labour, potential repairs or replacement parts, and aircraft out-of-service time. These are borne by operators.\n- Benefit: reduced risk of escape-slide detachment and associated injuries.\n- Implementation depends on availability of parts and qualified maintenance resources; operators may schedule work to align with other maintenance to reduce downtime.\n- The AD references and relies on external technical documents (FAA AD and Boeing SB). That reduces the amount of technical detail in the AD itself but requires operators to obtain and follow those documents exactly.\n\n**Other notable mechanical points**\n\n- For some aeroplanes the service bulletin allows replacement as an optional action for certain material-type inspections; whether replacement is required or optional depends on the aircraft and the service bulletin/FAA AD instructions.\n- Amendment 1 to this AD modifies the Applicability to match the Boeing service bulletin Revision 1.\n\n**Implementation risk and compliance burden**\n\n- Moderate compliance burden: inspections are standard maintenance tasks but the AD covers many older aircraft and may require out-of-service time and parts procurement.\n- Operational discretion rests with operators (when to schedule) but the technical content and required corrective actions are dictated by the FAA AD and Boeing SB, leaving little scope for alternative means without approval.\n\n(References: Applicability; Requirement referencing FAA AD 2008-18-07 and Boeing SB 747-53-2460 Rev 1; Compliance/effective date 12 November 2008; Background describing the hazard; Amendment 1 changing Applicability.)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-384-amdt-1-number-3-main-entry-doors","history":"/api/acts/ad-b747-384-amdt-1-number-3-main-entry-doors/history","analysis":"/api/acts/ad-b747-384-amdt-1-number-3-main-entry-doors/analysis","conflicts":"/api/acts/ad-b747-384-amdt-1-number-3-main-entry-doors/conflicts","importantCases":"/api/acts/ad-b747-384-amdt-1-number-3-main-entry-doors/important-cases","documents":"/api/acts/ad-b747-384-amdt-1-number-3-main-entry-doors/documents"}}