{"id":"F2008L00501","name":"AD/J4100/12 - Passenger Door Roller Guide Shear Cleats","slug":"ad-j4100-12-passenger-door-roller-guide-shear-cleats","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":119332,"registerId":"commonwealth-F2008L00501-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"BAe Systems (Operations) Jetstream 4100 ","sectionType":"division","heading":"BAe Systems (Operations) Jetstream 4100 Series Aeroplanes","content":"### BAe Systems (Operations) Jetstream 4100 Series Aeroplanes\n\n| AD/J4100/12 | Passenger Door Roller Guide Shear Cleats | 4/2008 DM |\n| ----------- | ---------------------------------------- | --------- |\n\n| Applicability: | Model Jetstream Series 4100 aircraft with constructor’s numbers 41004 through 41099.                                                                                                                                                                                                                                                                                                                                                                       |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with British Aerospace Regional Aircraft Alert Service Bulletin J41-A52-043 Revision 1, Part 1 and Part 2, or later CAA/EASA approved revision.Note: UK CAA AD 003-03-97 refers.                                                                                                                                                                                                                                                      |\n| Compliance:    | For Part 1: Unless the initial inspection is already accomplished; for doors with less than 7000 landings, inspect at 6000 landings or before 30 April 2008, whichever occurs later.Doors with more than 7000 landings are to be inspected within 30 days after 20 February 2008, unless already accomplished.For Part 2: Carry out repeat inspections at intervals not to exceed 1,500 landings; until accomplishment of BAe Service Bulletin J41-52-050. |\n|                | This Airworthiness Directive becomes effective on 20 February 2008.                                                                                                                                                                                                                                                                                                                                                                                        |\n| Background:    | Passenger door roller guide shear cleats have been found cracked on a fatigue test rig. If not corrected, this could lead to cracking of adjacent door structure.                                                                                                                                                                                                                                                                                          |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n15 February 2008","sortOrder":0},{"sectionNumber":"AD/J4100/12","sectionType":"part","heading":"AD/J4100/12","content":"## AD/J4100/12","sortOrder":1},{"sectionNumber":"Passenger Door Roller Guide Shear Cleats","sectionType":"part","heading":"Passenger Door Roller Guide Shear Cleats","content":"## Passenger Door Roller Guide Shear Cleats","sortOrder":2},{"sectionNumber":"4/2008 DM","sectionType":"part","heading":"4/2008 DM","content":"## 4/2008 DM","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive with narrow, targeted scope. It addresses a specific safety-critical defect discovered in fatigue testing and mandates inspection/repair accordingly. The scope remains tightly focused on the identified mechanical issue and affected aircraft serial numbers."},"complexity_factors":["Short, single-purpose directive with one specific mechanical component as focus","Only 2 defined compliance pathways based on landing count thresholds (7000 landings)","References external technical documents (British Aerospace Service Bulletin) rather than embedding full technical specifications","Simple conditional logic: 'if X landings, do Y; if not X, do Z'","No nested exceptions or cross-references to other legislation","Total length: approximately 250 words of substantive content"],"plain_english_summary":"This AD requires mandatory inspections of the passenger door roller guide shear cleats on BAe Jetstream 4100 aircraft (serials 41004–41099) after fatigue-testing found cracks that could spread into the door structure.  \n\nOwners/operators must perform initial and recurring inspections until the specified permanent repair (Service Bulletin J41-52-050) is installed to prevent possible door failure. Compliance is legally mandatory under Australian aviation safety law."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The directive applies only to Jetstream Series 4100 aircraft with constructor’s numbers 41004–41099 and mandates inspections and repeat inspections per the cited service bulletins to address cracked shear cleats. The instrument text shows no change to that original, targeted scope."},"complexity_factors":["Reference to external mandatory documents (BAe Alert Service Bulletin J41-A52-043 Rev 1 Part 1 & Part 2; BAe Service Bulletin J41-52-050) creates dependency on later revisions and regulator approvals (Requirement).","Dual timing rules based on landing counts (<7000 vs >7000) and fixed calendar deadlines (inspect at 6000 landings or before 30 Apr 2008; within 30 days after 20 Feb 2008) increase scheduling complexity (Compliance).","Ongoing compliance: repeat inspections at intervals not to exceed 1,500 landings until accomplishment of the follow-on service bulletin, requiring record-keeping and operational planning (Compliance).","Narrow applicability to specific constructor’s numbers (41004–41099) requires accurate fleet tracking and individual aircraft record checks (Applicability).","Effective date and short compliance windows create potential operational disruption and resource timing pressures for operators (Compliance/Effective date).","Regulatory discretion: acceptance of later CAA/EASA-approved revisions gives regulators and the manufacturer scope to change required methods or thresholds (Requirement)."],"plain_english_summary":"Requires operators of BAe Jetstream 4100 aircraft (constructor’s numbers 41004–41099) to inspect passenger door roller guide shear cleats and to carry out repeat inspections at set landing-count intervals, following BAe service bulletins or later CAA/EASA‑approved revisions. Effective 20 February 2008. The directive responds to cracked shear cleats found on a fatigue test rig; operators pay for inspections/repairs, must track landing counts and meet specified dates and intervals, and comply with any approved bulletin updates."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-j4100-12-passenger-door-roller-guide-shear-cleats","history":"/api/acts/ad-j4100-12-passenger-door-roller-guide-shear-cleats/history","analysis":"/api/acts/ad-j4100-12-passenger-door-roller-guide-shear-cleats/analysis","conflicts":"/api/acts/ad-j4100-12-passenger-door-roller-guide-shear-cleats/conflicts","importantCases":"/api/acts/ad-j4100-12-passenger-door-roller-guide-shear-cleats/important-cases","documents":"/api/acts/ad-j4100-12-passenger-door-roller-guide-shear-cleats/documents"}}