{"id":"F2006B10747","name":"AD/HU 369/82 - Rotor Blades","slug":"ad-hu-369-82-rotor-blades","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116755,"registerId":"commonwealth-F2006B10747-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1991","sectionType":"part","heading":"20-2380 20Z406 2217 2218 29B075 49B936 7888 7964 88-7008 AC10 AD59 AD68 AD74 AD98 AE55 AF47 AF57 AG66 AH28 AH82 AH92 AJ72 AK49 AL07 AL12 AL34 AL41 AL49 AM10 BC84 BC86 DC97 N579 N701 T667 U537 U762 V129 V297 V305 W314 W705 Y249 WW784 Y268 Y607 Y608 Y641 Y653 Y666 Y681 Y734 Y845.","content":"# 1991 20-2380 20Z406 2217 2218 29B075 49B936 7888 7964 88-7008 AC10 AD59 AD68 AD74 AD98 AE55 AF47 AF57 AG66 AH28 AH82 AH92 AJ72 AK49 AL07 AL12 AL34 AL41 AL49 AM10 BC84 BC86 DC97 N579 N701 T667 U537 U762 V129 V297 V305 W314 W705 Y249 WW784 Y268 Y607 Y608 Y641 Y653 Y666 Y681 Y734 Y845.\n\nMain rotor blade P/N 369A1100-503, \\-503A, \\-503M Serial numbers:","sortOrder":0},{"sectionNumber":"0321","sectionType":"part","heading":"1991 7845 AB81 AC10 AC52 AC70 AH97 AK28 AL34 AL43 AM10 AM11 AM74 AM76 AN24 AN90 AP64 AS81 AV03 AV51 AV81 AV85 AY25 B214 BB43 BC84 BC86 BC97 BD52 BE42 BE74 BE92 BN27 BN88 BS25 BS64 BT36 BT79 BY24 BY76 BY88 CB04 CF14 CF31 CH19 CH25 D850 T655 T661 T705 T716 U546 V673 VB08 W673 Y249 Y268 Y845 YO29.","content":"# 0321 1991 7845 AB81 AC10 AC52 AC70 AH97 AK28 AL34 AL43 AM10 AM11 AM74 AM76 AN24 AN90 AP64 AS81 AV03 AV51 AV81 AV85 AY25 B214 BB43 BC84 BC86 BC97 BD52 BE42 BE74 BE92 BN27 BN88 BS25 BS64 BT36 BT79 BY24 BY76 BY88 CB04 CF14 CF31 CH19 CH25 D850 T655 T661 T705 T716 U546 V673 VB08 W673 Y249 Y268 Y845 YO29.\n\nMain rotor blade P/N 369D21100 Serial numbers:","sortOrder":1},{"sectionNumber":"M1858 M1949 M1954 M2568 M2842 M3668 M381","sectionType":"part","heading":"M1858 M1949 M1954 M2568 M2842 M3668 M3819 M3901 M4137 M4240 M4369 M4499.","content":"# M1858 M1949 M1954 M2568 M2842 M3668 M3819 M3901 M4137 M4240 M4369 M4499.\n\nMain rotor blade P/N 369D21100-501, \\-501M Serial numbers:","sortOrder":2},{"sectionNumber":"3799","sectionType":"part","heading":"3863 3929 5303 AL12 AL41 Y641.","content":"# 3799 3863 3929 5303 AL12 AL41 Y641.\n\nMain rotor blade P/N 396D21600-505, 505M Serial numbers:\n\n0278 0321 0693 1949 1954 3679 3787 3789 4889 5076 5303 5932","sortOrder":3},{"sectionNumber":"6059","sectionType":"part","heading":"6537 6705 8539 M3461 M3615 M3846 M4119 M42 M4377.","content":"# 6059 6537 6705 8539 M3461 M3615 M3846 M4119 M42 M4377.\n\nMain rotor blade P/N 369D21100-505 Serial numbers:\n\n3010 3289 3799 3829 3863 3929 3985 4411 4711 4794 5930 5933","sortOrder":4},{"sectionNumber":"5938","sectionType":"part","heading":"6111 6782 7906 8019 AL12 AL41 Y641.","content":"# 5938 6111 6782 7906 8019 AL12 AL41 Y641.\n\nMain rotor blade P/N 369D21100-509, \\-509M Serial numbers:\n\n```html\n

0145

0156

0200

0219

0243 0278 0641 0798 0996

1310

1391

1645

1663

1792

1798

1858

1891 2482 2639 2842 3200

3238

3910

3819

3980

4573

5043

5076

5120M 5121 5162 5303 5491

901

5977

6298

7766

8042

8168

8495

8684 M3668 M3910 M4100

M4369 M4499.

\n```\n\nMain rotor blade P/N 369D21100-513, \\-513M Serial numbers:\n\n| 0073 | 0278 | 0576 | 0583 | 0587 | 0602 | 0641 | 0649 | 0815 | 0920 | 0986 | 1211 |\n| ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ----- |\n| 1560 | 1663 | 1837 | 1858 | 1975 | 2423 | 2716 | 2719 | 2956 | 3082 | 3238 | 3299 |\n| 3353 | 3339 | 3479 | 3782 | 3816 | 3864 | 3931 | 4139 | 4230 | 4411 | 4499 | 4794 |\n| 5901 | 6537 | 6851 | 7766 | 8019 | 8168 | 8270 | 8495 | A431 | A549 | B004 | B449 |\n| B470 | B511 | B530 | B713 | B727 | B738 | B760 | D526 | D539 | D543 | D544 | D549. |\n\nMain rotor blade P/N 369D21613-11","sortOrder":5}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This appears to be a complete technical annex listing affected rotor blades. It serves its original purpose as a reference document for an Airworthiness Directive. No scope creep is evident — it remains a parts identification list."},"complexity_factors":["No legislative text or operative provisions — purely a technical data list","Extensive serial number enumeration (hundreds of individual items) creating visual density","Multiple part number variants with subtle suffix differences (-503, -503A, -503M, -501, -501M, etc.)","Inconsistent formatting (plain text lists mixed with HTML table markup)","No definitions, cross-references, or conditional logic — just raw data enumeration","Duplicate serial numbers appear across sections (e.g., M1858, M1949, M1954 appear twice in one list)"],"plain_english_summary":"This Airworthiness Directive identifies specific main rotor blade part and serial numbers for MD/Hughes 369/MD 500 series helicopters that have known airworthiness concerns. Affected blades must be inspected, modified, or removed from service per the AD.\n\nIt affects aircraft operators, owners, pilots and maintenance organisations in Australia; non‑compliant blades cannot be flown until the directive’s requirements are met to prevent potentially catastrophic blade failures."},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":false,"description":"The provided text only sets out a list of affected main rotor blade part numbers and serial numbers. No amendment history or comparison to an earlier instrument is included, so there is no evidence in the source that the scope has changed from any prior intent."},"complexity_factors":["Very large number of alphanumeric serial numbers across many part-number variants (hard to audit manually).","Repeated and duplicated entries (same numbers and codes appear more than once), increasing verification difficulty.","Multiple P/N suffixes and variants (e.g. -503, -503A, -503M; -501, -501M; -505, -505M; -509, -509M; -513, -513M) requiring precise matching rules.","Inconsistent formatting within the source (plain lists, table markup/HTML, and a Markdown-like table), which complicates automated parsing.","Mixture of numeric, alphabetic and mixed serials (e.g. M-prefixed, two-letter codes) increases chance of transcription errors.","No operative actions, timeframes or procedural steps are included in the text provided — only identification — so implementers must locate the corresponding requirements elsewhere.","Potential for scope ambiguity when serial numbers are duplicated or listed under multiple P/Ns, raising traceability and liability questions for owners."],"plain_english_summary":"This instrument lists specific helicopter main rotor blade part numbers and serial numbers that are within its coverage. It works mechanically as an identification catalogue: operators and maintenance organisations must check blades in their fleets against the listed P/Ns and serial numbers to know whether the instrument applies.\n\nIt affects aircraft owners, operators and maintainers by creating traceability and compliance obligations for any blade that appears on the list, so those parties will incur the administrative and inspection work needed to confirm applicability."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-82-rotor-blades","history":"/api/acts/ad-hu-369-82-rotor-blades/history","analysis":"/api/acts/ad-hu-369-82-rotor-blades/analysis","conflicts":"/api/acts/ad-hu-369-82-rotor-blades/conflicts","importantCases":"/api/acts/ad-hu-369-82-rotor-blades/important-cases","documents":"/api/acts/ad-hu-369-82-rotor-blades/documents"}}