{"id":"F2009L01839","name":"AD/DO 228/10 Amdt 1 - Fuselage Frame 19","slug":"ad-do-228-10-amdt-1-fuselage-frame-19","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":78843,"registerId":"commonwealth-F2009L01839-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Dornier 228 Series Aeroplanes","sectionType":"division","heading":"Dornier 228 Series Aeroplanes","content":"### Dornier 228 Series Aeroplanes\n\n| AD/DO 228/10 Amdt 1 | Fuselage Frame 19 | 6/2009 |\n| ------------------- | ----------------- | ------ |\n\n| Applicability: | Model 228-100, -101, -200, -201, -202, and -212 aircraft, all serial numbers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. For aircraft with serial numbers 7011 through 7168, and 8012 through 8245, except serial numbers 8107 and 8169;- which have accumulated 120 ‘short-field’ landings or more on Short Take-Off and Landing (STOL) airfields at the effective date of this Directive, over the last 1,200 landings accomplished before the effective date of this Directive:a. Inspect for cracks in the lower centre section of fuselage frame 19 in accordance with Structural Significant Item (SSI) Task No. 53.37 of the Structure Inspection Programme of the Dornier 228 Time Limits/Maintenance Checks Manual.b. If no cracking is detected, before the accumulation of 800 landings after the effective date of this Directive, install the reinforcements and butt straps on fuselage frame 19 in accordance with the Accomplishment Instructions of RUAG Aerospace Services GmbH Service Bulletin No. SB-228-273 original issue, or later EASA approved revision.c. If cracking is detected, repair in accordance with an EASA-approved repair solution.2. For aircraft with serial numbers 7011 through 7168, and 8012 through 8245, except serial numbers 8107 and 8169;- which have not accumulated 120 ‘short-field’ landings or more on Short Take-Off and Landing (STOL) airfields at the effective date of this Directive, over the last 1,200 landings accomplished before the effective date of this Directive:a. Accomplish SSI Task No. 53.37 within the compliance schedule as defined in the Structure Inspection Programme of the Dornier 228 Time Limits/Maintenance Checks Manual.b. If any damage is detected, repair in accordance with an EASA-approved repair solution. |\n\n|             | 3. After accomplishment of applicable Requirement 1 necessary actions or Requirement 2 necessary actions, repeat thereafter SSI Task No. 53.37.4. For all remaining aircraft, accomplish SSI Task No. 53.37 within the compliance schedule as defined in the Structure Inspection Programme of the Dornier 228 Time Limits/Maintenance Checks Manual.Note 1: For the purpose of this Directive, a Short Take-Off is made when the aircraft clears a 50 ft (15 m) obstacle within 1,500 ft (450 m) of commencing take-off, and a Short Landing is made when the aircraft stops within 1,500 ft (450 m) after passing over a 50 ft (15 m) obstacle.Note 2: EASA AD 2009-0085 refers. |\n| ----------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | 1.a. Within 800 landings after the effective date of this Directive.1.b. As specified in Requirement 1.b.1.c. Before further flight.2.a. As specified in Requirement 2.a.2.b. Before further flight.3. At intervals not to exceed 2,400 landings or 72 months, whichever occurs first.4. As specified in Requirement 4 for the initial inspection time. Repeat thereafter at intervals not to exceed 2,400 landings or 72 months, whichever occurs first.                                                                                                                                                                                                                          |\n|             | This Amendment becomes effective on 4 June 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n| Background: | During a maintenance inspection, cracks were detected on the centre section of fuselage frame 19. Fuselage frame 19 supports the rear side of the main landing gear. The investigation on the cause of the cracking is still in progress. Such cracking, unless detected and corrected, could result in failure of frame 19, and subsequent collapse of a main landing gear. The requirements of this Directive are considered to be an interim action.                                                                                                                                                                                                                            |\n\n|     | Amendment 1 is issued in response to a new EASA AD, which requires installation of reinforcements and butt straps on frame 19 at the lower part of the fuselage for aircraft used in operations where this frame may be subject to high stress, and recurring inspections of that frame for all aircraft. |\n| --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n24 April 2009","sortOrder":0},{"sectionNumber":"AD/DO 228/10 Amdt 1","sectionType":"part","heading":"AD/DO 228/10 Amdt 1","content":"## AD/DO 228/10 Amdt 1","sortOrder":1},{"sectionNumber":"Fuselage Frame 19","sectionType":"part","heading":"Fuselage Frame 19","content":"## Fuselage Frame 19","sortOrder":2},{"sectionNumber":"6/2009","sectionType":"part","heading":"6/2009","content":"## 6/2009","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":6,"scope_assessment":{"changed":false,"description":"This is Amendment 1 to an existing Airworthiness Directive. The amendment expands the original directive by adding reinforcement requirements for high-utilisation short-field aircraft and establishing recurring inspection intervals for all affected aircraft. This represents a natural evolution of the safety response rather than scope creep — the directive remains tightly focused on fuselage frame 19 integrity and landing gear support structure."},"complexity_factors":["Multiple conditional pathways based on aircraft serial numbers (two specific ranges with two exceptions)","Dual classification system based on operational history (120+ 'short-field' landings vs fewer)","Nested requirements with different compliance timelines (immediate repair vs 800-landing window vs scheduled programme)","Cross-references to external technical documents (RUAG Service Bulletin SB-228-273, EASA AD 2009-0085, Dornier 228 Time Limits/Maintenance Checks Manual SSI Task 53.37)","Defined technical terms requiring specific measurement thresholds (50 ft/15 m obstacle, 1,500 ft/450 m distance)","Dual-unit measurements (imperial and metric) creating parallel compliance criteria","Alternative compliance intervals based on whichever occurs first (2,400 landings OR 72 months)","Interim action status indicating future amendments likely"],"plain_english_summary":"This AD requires mandatory inspections and, for higher-risk airframes, reinforcement of fuselage frame 19 on certain Dornier 228s after cracks were found that could lead to main landing gear collapse. It forces immediate repair if cracking is detected and recurring checks to prevent catastrophic failure.\n\nIt primarily affects specified serial-numbered Dornier 228s used in frequent short-field operations, with other aircraft subject to periodic inspection requirements."},"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"},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"Amendment 1 expanded the directive from interim inspections to include mandatory installation of reinforcements and butt straps on fuselage frame 19 for aircraft used in high-stress (STOL) operations, while imposing recurring inspections for all affected aircraft. The change (see 'Amendment 1' and Requirement 1.b) shifts some operators from an inspection-only regime to one requiring modification per RUAG Service Bulletin SB-228-273 (or later EASA-approved revision), and makes EASA-approved repairs compulsory where cracking is found (Requirements 1.c and 2.b)."},"complexity_factors":["Conditional applicability tied to serial-number ranges with two explicit exceptions (serials 7011–7168 and 8012–8245, excluding 8107 and 8169).","Operational threshold test: whether the aircraft accumulated 120 or more 'short-field' landings within the last 1,200 landings determines different obligations (Requirement 1 v. Requirement 2).","Multiple, staggered compliance timelines (e.g. inspections within 800 landings; 'before further flight' for detected damage; recurring intervals not to exceed 2,400 landings or 72 months).","Mandated modification work per a specific service bulletin (RUAG SB-228-273) or later EASA-approved revision (Requirement 1.b).","Repairs and modification approvals must be EASA‑approved solutions, creating dependency on external certification (Requirements 1.c and 2.b).","Counting and record-keeping complexity from defining and proving 'short-field' take-offs/landings (Note 1) and measuring them over a rolling 1,200-landing window.","Cross-reference to an external EASA AD (EASA AD 2009-0085) and the Dornier 228 Time Limits/Maintenance Checks Manual (SSI Task No. 53.37) increases procedural interdependence."],"plain_english_summary":"This directive requires operators of Dornier 228 series aeroplanes to inspect fuselage frame 19 for cracks and, for certain serial-numbered aircraft with frequent short-field (STOL) operations, to install reinforcements and butt straps. It sets inspection intervals, repair standards and specific compliance deadlines. It affects owners/operators of the listed models and serial ranges by imposing inspection, repair and modification obligations to reduce the risk of frame failure and main landing gear collapse."}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-228-10-amdt-1-fuselage-frame-19","history":"/api/acts/ad-do-228-10-amdt-1-fuselage-frame-19/history","analysis":"/api/acts/ad-do-228-10-amdt-1-fuselage-frame-19/analysis","conflicts":"/api/acts/ad-do-228-10-amdt-1-fuselage-frame-19/conflicts","importantCases":"/api/acts/ad-do-228-10-amdt-1-fuselage-frame-19/important-cases","documents":"/api/acts/ad-do-228-10-amdt-1-fuselage-frame-19/documents"}}