{"id":"F2005L03561","name":"AD/B737/260 - Wing Front and Rear Spars Upper and Lower Chords","slug":"ad-b737-260-wing-front-and-rear-spars-upper-and-lower-chords","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":39099,"registerId":"commonwealth-F2005L03561-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 737 Series Aeroplanes","sectionType":"division","heading":"Boeing 737 Series Aeroplanes","content":"### Boeing 737 Series Aeroplanes\n\n| AD/B737/260 | Wing Front and Rear SparsUpper and Lower Chords | 13/2005 |\n| ----------- | ----------------------------------------------- | ------- |\n\n| Applicability: | Model 737-100 and -200 series aircraft, line number 1 through 310, and 323.                                                                                                                                                                                                                                                                                                                          |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2001-16-06Amdt 39-12374.Note: Boeing Service Bulletin 737-57-1067 Revision 4, or later FAA approved revision, refers.                                                                                                                                                                                                                 |\n| Compliance:    | As specified in the Requirement document.                                                                                                                                                                                                                                                                                                                                                            |\n|                | This Airworthiness Directive becomes effective on 22 December 2005.                                                                                                                                                                                                                                                                                                                                  |\n| Background:    | The FAA received reports of cracks and corrosion in the upper chord of the front and rear spars of the wing and reports of cracks propagating from previously repaired areas. The actions specified by this Directive are intended to detect and correct such cracking or corrosion of the upper and lower chords of the wing spars, which could result in reduced structural integrity of the wing. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n10 November 2005","sortOrder":0},{"sectionNumber":"AD/B737/260","sectionType":"part","heading":"AD/B737/260","content":"## AD/B737/260","sortOrder":1},{"sectionNumber":"Wing Front and Rear SparsUpper and Lower","sectionType":"part","heading":"Wing Front and Rear SparsUpper and Lower Chords","content":"## Wing Front and Rear Spars  \nUpper and Lower Chords","sortOrder":2},{"sectionNumber":"13/2005","sectionType":"part","heading":"13/2005","content":"## 13/2005","sortOrder":3}],"analysis":{"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":4,"scope_assessment":{"changed":false,"description":"The directive's scope aligns with its stated intent: detect and correct cracking or corrosion in the upper and lower chords of the front and rear wing spars on specified early 737 airframes. It limits application to listed line numbers and requires compliance with the referenced FAA AD and Boeing service bulletin, without expanding to other models or structures (Applicability; Requirement; Background)."},"complexity_factors":["Cross-reference to external FAA AD (2001‑16‑06) and Boeing Service Bulletin 737‑57‑1067 Rev 4 — requires reading and following multiple external technical documents (Requirement).","Technical nature of inspections and repairs — detecting corrosion and crack propagation in upper/lower spars chords requires specialised structural inspection and repair capability (Background).","Applicability limited to specific line numbers (1–310 and 323) — operators must determine whether individual airframes are in scope (Applicability).","Compliance is prescribed by the referenced documents with CASA effective-date enforcement — limited regulatory discretion but operational burden on operators to meet specified procedures (Compliance).","Reports of cracks propagating from prior repairs increase inspection complexity and may require follow-on engineering/repair approvals (Background).","Potential recordkeeping and downtime costs for operators while inspections/repairs are carried out — implicit operational and cost impacts (Requirement; Compliance)."],"plain_english_summary":"This directive requires operators of Boeing 737‑100 and ‑200 aircraft (line numbers 1–310 and 323) to inspect and, if necessary, repair the upper and lower chords of the wing front and rear spars in line with FAA AD 2001‑16‑06 and Boeing Service Bulletin 737‑57‑1067 Rev 4. (Applicability; Requirement). Operators pay for inspections and repairs; the Civil Aviation Safety Authority set the effective date (22 Dec 2005). The stated purpose is to detect and correct cracking or corrosion that could reduce wing structural integrity. (Compliance; Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive with a narrow, specific scope — addressing a known safety defect in particular aircraft models. It has not expanded beyond its original purpose of mandating inspections and repairs for wing spar cracking."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 1 defined term implicitly referenced (line number)","No cross-references to other Australian legislation","Single, clear compliance requirement (follow the FAA AD)","No conditional logic or exceptions — applies straightforwardly to listed aircraft","Technical content is incorporated by reference to external documents (FAA AD and Boeing Service Bulletin), keeping the legislative instrument itself minimal"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections and repairs of the front and rear wing spars on early Boeing 737‑100/‑200 aircraft (line numbers 1–310 and 323) after FAA reports of cracks and corrosion — including growth from prior repairs — that could lead to wing failure. Operators must comply with FAA AD 2001‑16‑06 and Boeing Service Bulletin 737‑57‑1067 Revision 4 (or later); the compliance deadline was 22 December 2005."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-260-wing-front-and-rear-spars-upper-and-lower-chords","history":"/api/acts/ad-b737-260-wing-front-and-rear-spars-upper-and-lower-chords/history","analysis":"/api/acts/ad-b737-260-wing-front-and-rear-spars-upper-and-lower-chords/analysis","conflicts":"/api/acts/ad-b737-260-wing-front-and-rear-spars-upper-and-lower-chords/conflicts","importantCases":"/api/acts/ad-b737-260-wing-front-and-rear-spars-upper-and-lower-chords/important-cases","documents":"/api/acts/ad-b737-260-wing-front-and-rear-spars-upper-and-lower-chords/documents"}}