{"id":"F2006B09193","name":"AD/DHC-8/37 Amdt 1 - Fuselage Skin and Frames at Floor Level","slug":"ad-dhc-8-37-amdt-1-fuselage-skin-and-frames-at-floor-level","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52999,"registerId":"commonwealth-F2006B09193-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHC-8/37 Amdt 1 - Fuselage Skin and Frames at Floor Level","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes\n\nAD/DHC-8/37\n\nAmdt 1\n\n  \nFuselage Skin and Frames at Floor Level 7/95\n\nApplicability: DHC-8 aircraft Models 102 and 103, Serial Numbers 101 to 180 inclusive, with de Havilland Modification 8/0427 incorporated which have exceeded 15543 landings at 25 May 1995 and which have not been inspected in accordance with the Maintenance Program Manual PSM 1-8-7 Task 5310/30C (Section 3-53, Page 12 dated 10 August\n\n1993).\n\nRequirement: 1. Thoroughly clean the external fuselage skin from fuselage station X253.00 to X653.349 from stringer 20 to stringer 24. Perform a detailed visual inspection of the area for cracking in accordance with de Havilland Service Bulletin 8-53-48.\n\n2. Internally inspect the fuselage frames and skin in accordance with PSM 1-8-7, Structural Inspection Program Task 5310/30C (Section 3-53 page 12 dated 12 August 1993).\n\nAccomplishment of the internal inspection terminates the Requirements of this Directive.\n\nNote: Transport Canada AD CF-94-17 refers.\n\nCompliance: 1. Initially inspect in accordance with Requirement 1 within 200 flights after 27 April 1995. Repeat the inspections at intervals not to exceed 769 flights.\n\n2. Inspect in accordance with Requirement 2 before 31086 flights or before further flight if cracks are found as a result of Requirement 1 inspection.\n\nNote: Aircraft which have been inspected internally in accordance with PSM 1-8-7 Task 5310/30C revert to the on-going inspection requirements of the PSM.\n\nAmendment 1 makes no change to the technical requirements of this Directive.\n\nBackground: In an early issue of the manufacturer’s Maintenance Program Airworthiness Limitations List, one if the tasks included a misleading remark about the task effectively. Consequently, on post Modification 8/0427 aircraft the fuselage frames may not have been inspected at the intervals intended. This out-of-sequence inspection will bring the affected aircraft into compliance with the current airworthiness limitations. Amendment 1 corrects a typographical error in the Applicability and adds the current note to the Compliance paragraph.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 1 does not change the technical requirements or extend the directive's substantive scope. It corrects a typographical error in the Applicability and adds a current note to the Compliance paragraph while leaving inspection obligations and termination conditions intact (Amendment 1; Background)."},"complexity_factors":["Applicability narrowly targets specific models, serial numbers and a modification with a precise landing threshold (Applicability).","Two-tier inspection regime: external cleaning and detailed visual inspection (Requirement 1, Service Bulletin 8‑53‑48) plus an internal structural inspection (Requirement 2, PSM Task 5310/30C).","Multiple, non-uniform compliance timings and thresholds (initial within 200 flights after 27 Apr 1995; repeat ≤769 flights; internal inspection before 31,086 flights or earlier if cracks found) (Compliance).","Termination provision: performing the internal inspection removes the AD's ongoing requirements (Requirement 2, Note).","Dependence on external manufacturer documents and a maintenance‑program task for inspection method and intervals increases administrative and technical compliance burden (Service Bulletin 8‑53‑48; PSM 1‑8‑7 Task 5310/30C).","Cross-reference to an overseas directive (Transport Canada AD CF‑94‑17) for related context.","Amendment 1 only corrects a typographical error and adds a compliance note, not technical substance (Background/Amendment)."],"plain_english_summary":"This Airworthiness Directive requires operators of Bombardier DHC‑8 Models 102 and 103 (S/N 101–180 with de Havilland Mod 8/0427) that have exceeded 15,543 landings to clean and visually inspect a specified fuselage skin area and to carry out an internal frame/skin inspection under the manufacturer's Structural Inspection Program. Completing the internal inspection ends the AD's requirements.\n\nIt was issued to restore the intended inspection intervals after a maintenance‑program wording error; operators meet specified flight‑count deadlines, bear the inspection costs, and must follow Service Bulletin 8‑53‑48 and PSM Task 5310/30C."},"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 Amendment 1 to an existing Airworthiness Directive. The amendment explicitly states it makes no technical changes—only correcting a typographical error in the applicability section and adding a clarifying note. The scope remains limited to the original safety inspection requirement for specific high-cycle DHC-8 aircraft."},"complexity_factors":["Highly specific applicability criteria (specific models, serial number range, modification status, landing count threshold, and prior inspection status)","Precise structural references requiring technical knowledge (fuselage stations X253.00 to X653.349, stringers 20–24)","Cross-references to external documents (de Havilland Service Bulletin 8-53-48, PSM 1-8-7 Task 5310/30C, Transport Canada AD CF-94-17)","Conditional compliance logic (different deadlines for external vs internal inspections, immediate action if cracks found)","Technical aviation terminology throughout (fuselage stations, stringers, modification numbers, flight cycles vs landings)"],"plain_english_summary":"This safety inspection order targets Bombardier DHC‑8 (Dash 8) Models 102/103, serials 101–180, that have done >15,543 landings and received Modification 8/0427 (and haven’t already had the specified internal inspection). It mandates external and internal inspections of the fuselage at floor level to find cracks missed due to confusing manufacturer instructions, with set repeat and total‑flight deadlines. The amendment fixes a typo and adds clarification only—no technical change."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-8-37-amdt-1-fuselage-skin-and-frames-at-floor-level","history":"/api/acts/ad-dhc-8-37-amdt-1-fuselage-skin-and-frames-at-floor-level/history","analysis":"/api/acts/ad-dhc-8-37-amdt-1-fuselage-skin-and-frames-at-floor-level/analysis","conflicts":"/api/acts/ad-dhc-8-37-amdt-1-fuselage-skin-and-frames-at-floor-level/conflicts","importantCases":"/api/acts/ad-dhc-8-37-amdt-1-fuselage-skin-and-frames-at-floor-level/important-cases","documents":"/api/acts/ad-dhc-8-37-amdt-1-fuselage-skin-and-frames-at-floor-level/documents"}}