{"id":"F2009L02864","name":"AD/SWSA226/84 Amdt 1 - Cargo Door Lower Belt Frames","slug":"ad-swsa226-84-amdt-1-cargo-door-lower-belt-frames","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":80207,"registerId":"commonwealth-F2009L02864-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Fairchild (Swearingen) SA226 and SA227 S","sectionType":"division","heading":"Fairchild (Swearingen) SA226 and SA227 Series Aeroplanes","content":"### Fairchild (Swearingen) SA226 and SA227 Series Aeroplanes\n\n| AD/SWSA226/84 Amdt 1 | Cargo Door Lower Belt Frames | 8/2009 |\n| -------------------- | ---------------------------- | ------ |\n\n```html\n

Applicability:

Models

Serial Numbers

SA226-AT

AT001 through AT074

SA226-TC

TC201 through TC419

SA227-AC

AC406, AC415, AC416, AC420 through AC456, AC458 through AC469, and AC471 through AC478

SA227-AT

AT423 through AT469

Requirement:

1. Inspect the cargo door lower belt frames at the cargo latch receptacles for cracks in accordance with Part A of the Accomplishment Instructions section in Fairchild Aircraft SA226 Series Service Bulletin 226-53-007, issued 7 May 1981, revised 17 February 1992; or SA227 Series Service Bulletin 227-53-003, issued 29 January 1986, revised 13 February 1986; as applicable.

2. If cracks are found, accomplish the following:

- For belt frames located at Fuselage Station (FS) 438.060 and FS 491.060, repair the belt frame by installing angle part number (P/N) 27-22206-009 or 27-22206-010, in accordance with the Fairchild Aircraft SA226 / 227 Structural Repair Manual (SRM), Section 53-90-20, initial issue 1 March 1983, Revision 24, dated 27 August 1997; or Fairchild Aircraft Approved Repair Procedure (ARP) 53-30-9701, dated 28 July 1997. The reinforcement doublers (P/N 27-22206-007 and -008) are also needed together with this repair.

- For belt frames located at FS 454.501, FS 455.726, FS 473.392, and FS 474.657, replace all four belt frames with new design frames, P/N
27-22207-008, 27-22208-005, and 27-22207-007, respectively, in accordance with the SA226 / 227 SRM, Section 53-90-20; or, ARP
53-30-9701. No reinforcement doublers are needed for these four new design belt frames.

\n```\n\n| | 3. If no cracks are found in all six belt frames during the inspection, install reinforcement doublers in all six belt frames in accordance with Part B of the Accomplishment Instructions of SB 226-53-007 or SB 227-53-003, as applicable.Compliance with cancelled AD/SWSA226/37 for SA226-AT and SA226-TC model aeroplanes constitutes compliance with this AD.Note: FAA AD 98-06-25 Amdt 39-10403 refers. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | 1. Within 500 hours time in service after 18 June 1998.2. Before further flight.3. Within 500 hours time in service after accomplishment of the Requirement 1 inspection. |\n| | This Amendment becomes effective on 30 July 2009. |\n| Background: | This AD is amended to reference relationship between this AD and cancelled AD/SWSA226/37.The FAA requires certain actions as a result of a decompression incident during flight caused by fatigue at the bottom of the cargo door on a Model SA226-TC. Failure of the cargo door in flight could cause decompression injury to passengers and substantial structural damage to the aircraft. |\n\n![](image.001.png) \nDavid Villiers \nDelegate of the Civil Aviation Safety Authority\n\n17 June 2009","sortOrder":0},{"sectionNumber":"AD/SWSA226/84 Amdt 1","sectionType":"part","heading":"AD/SWSA226/84 Amdt 1","content":"## AD/SWSA226/84 Amdt 1","sortOrder":1},{"sectionNumber":"Cargo Door Lower Belt Frames","sectionType":"part","heading":"Cargo Door Lower Belt Frames","content":"## Cargo Door Lower Belt Frames","sortOrder":2},{"sectionNumber":"8/2009","sectionType":"part","heading":"8/2009","content":"## 8/2009","sortOrder":3}],"analysis":{"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":5,"scope_assessment":{"changed":false,"description":"The amendment only adds a reference clarifying the relationship between this AD and the earlier cancelled AD/SWSA226/37 and does not change the listed applicability, inspection or repair requirements, nor the stated compliance times. (Source: \"This AD is amended to reference relationship between this AD and cancelled AD/SWSA226/37.\")"},"complexity_factors":["Technical maintenance actions: inspection for cracks, structural repair or full replacement, and installation of reinforcement doublers (Requirement 1–2).","Multiple conditional paths: different repairs required depending on crack location (FS positions) and whether cracks are found (Requirement 2 and 3).","Detailed parts and references: specific part numbers (P/N 27-22206-009/010 etc.), reinforcement doublers, and SRM/ARP documents are mandated for compliance (Requirement 2).","External-document dependency: compliance requires following Service Bulletins SA226-53-007 or SA227-53-003 and SRM/ARP procedures, so operators must obtain and follow those documents.","Time-critical compliance schedule: mixed deadlines (within 500 hours TIS; before further flight for repairs; within 500 hours after inspection) increase operational planning complexity (Compliance section).","Applicability complexity: multiple models and detailed serial-number ranges are listed, requiring fleet-by-fleet applicability checks (Applicability table).","Regulatory cross-references: amendment ties this AD to a cancelled AD/SWSA226/37 and references FAA AD 98-06-25, which may affect interpretation and historical compliance records (Background; note).","Compliance burden on operators and maintainers: immediate actions for detected cracks (before further flight) create potential operational disruption and parts/repair resource needs."],"plain_english_summary":"Requires inspection of cargo door lower belt frames at the cargo-latch receptacles for cracks, and—depending on findings—repair, replacement or installation of reinforcement doublers, on specified Fairchild (Swearingen) SA226/SA227 aeroplanes. It binds operators and maintenance organisations for the listed serial-numbered aircraft, with deadlines set in flight hours or before further flight for repairs. The amendment notes a relationship to a cancelled earlier AD and cross-references FAA AD 98-06-25."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This Amendment 1 maintains the original scope of the 1998 directive. The amendment solely clarifies the relationship with a cancelled previous directive (AD/SWSA226/37) and does not expand applicability, add new aircraft models, or introduce additional requirements beyond the original safety intent."},"complexity_factors":["Multiple aircraft model variants with different serial number ranges requiring careful cross-referencing","Six specific fuselage station locations (FS 438.060, 454.501, 455.726, 473.392, 474.657, 491.060) with different repair procedures for each","Nested conditional logic: inspection → if cracks found → different repair paths depending on location → if no cracks → preventive action","Multiple technical reference documents (Service Bulletins 226-53-007 and 227-53-003, Structural Repair Manual Section 53-90-20, Approved Repair Procedure 53-30-9701) with specific revision dates","Specific part numbers required for repairs (P/N 27-22206-009, -010, -007, -008, 27-22207-008, 27-22208-005, 27-22207-007)","Compliance cross-reference to cancelled previous directive (AD/SWSA226/37) creating interdependency with regulatory history","Three separate compliance timeframes with different triggers (calendar date vs flight hours vs inspection completion)"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection and corrective action on the lower cargo-door belt frames of specific Fairchild Swearingen SA226/SA227 aircraft to prevent fatigue cracks that caused an in-flight cargo-door failure and rapid decompression. Affected are owners/operators and maintenance organisations of the ~300+ listed airframes. Inspections must occur within 500 flight hours, cracks must be repaired before flight, and preventive reinforcement is required to stop future failures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-84-amdt-1-cargo-door-lower-belt-frames","history":"/api/acts/ad-swsa226-84-amdt-1-cargo-door-lower-belt-frames/history","analysis":"/api/acts/ad-swsa226-84-amdt-1-cargo-door-lower-belt-frames/analysis","conflicts":"/api/acts/ad-swsa226-84-amdt-1-cargo-door-lower-belt-frames/conflicts","importantCases":"/api/acts/ad-swsa226-84-amdt-1-cargo-door-lower-belt-frames/important-cases","documents":"/api/acts/ad-swsa226-84-amdt-1-cargo-door-lower-belt-frames/documents"}}