{"id":"F2006L03363","name":"AD/CIRRUS/4 Amdt 1 - Crew Seats","slug":"ad-cirrus-4-amdt-1-crew-seats","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":60761,"registerId":"commonwealth-F2006L03363-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cirrus Design SR20 and SR22 Series Aerop","sectionType":"division","heading":"Cirrus Design SR20 and SR22 Series Aeroplanes","content":"### Cirrus Design SR20 and SR22 Series Aeroplanes\n\n| AD/CIRRUS/4 Amdt 1 | Crew Seats | 12/2006 DM |\n| ------------------ | ---------- | ---------- |\n\n| Applicability: | Model SR20 aircraft, serial numbers 1005 through 1600.Model SR22 aircraft, serial numbers 0002 through 1727.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. For Model SR20 aircraft, serial numbers 1005 through 1600, and Model SR22 aircraft, serial numbers 0002 through 1727:Accomplish the requirements of Cirrus Design Corporation Alert Service Bulletin SB 2X-25-17, Revised 20 January 2006.2. For Model SR20 aircraft, serial numbers 1005 through 1455, and Model SR22 aircraft, serial numbers 0002 through 1044:Accomplish the requirements of Cirrus Design Corporation Alert Service Bulletin SB 2X-25-06 R4, Revised 5 May 2005.Note 1: FAA AD 2006-19-10 Amdt 39-14767 refers.Note 2: Requirement 2 remains unchanged from the original issue of this Airworthiness Directive and need not be reapplied if previously accomplished. |\n| Compliance:    | Requirement 1: Within 50 hours time in service or 180 days after 23 November 2006, whichever occurs first; unless already accomplished.Requirement 2: Within 50 hours time in service or 180 days after 13 October 2005, whichever occurs first; unless already accomplished.Note: The compliance date for Requirement 2 of this Airworthiness Directive remains unchanged by this amendment.                                                                                                                                                                                                                                                                                                |\n|                | This Amendment becomes effective on 24 October 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n| Background:    | The FAA received information from the manufacturer that the crew seats, under emergency landing dynamic loads, may fold forward at less than the 26g required by the regulations. The actions required by this Directive are intended to prevent the crew seats from folding forward during emergency landing dynamic loads with consequent occupant injury.                                                                                                                                                                                                                                                                                                                                 |\n\n|     | This amendment has been raised because the manufacturer has developed new crew seat break-over pins to replace the old crew seat break-over bolts. Consequently, this AD retains the action from the original issue of replacing the crew seat recline locks on both seats and adds the action of replacing the crew seat break-over bolts with the new crew seat break-over pins on both seats.This amendment was raised to apply FAA AD 2006-19-10 which superseded AD 2005-17-19.The original issue of this Airworthiness Directive became effective on 27 September 2005 |\n| --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n10 October 2006","sortOrder":0},{"sectionNumber":"AD/CIRRUS/4 Amdt 1","sectionType":"part","heading":"AD/CIRRUS/4 Amdt 1","content":"## AD/CIRRUS/4 Amdt 1","sortOrder":1},{"sectionNumber":"Crew Seats","sectionType":"part","heading":"Crew Seats","content":"## Crew Seats","sortOrder":2},{"sectionNumber":"12/2006 DM","sectionType":"part","heading":"12/2006 DM","content":"## 12/2006 DM","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This amendment expands the original directive's scope by adding a new mandatory hardware replacement: replacing crew seat break-over bolts with new break-over pins on both seats (the original directive required replacement of recline locks only). It also formally incorporates and applies the FAA AD 2006-19-10 (which superseded a prior FAA AD). Requirement 2 (the earlier recline-lock work) is retained but left unchanged; Requirement 1 (the new pins) is newly added and applies to a broader serial-number range. These additions increase the work operators must carry out and introduce a new parts dependency compared with the original issue."},"complexity_factors":["Two discrete mandatory actions (Requirement 1 and Requirement 2) with different serial-number scopes","References to two manufacturer Alert Service Bulletins (SB 2X-25-17 and SB 2X-25-06 R4) that prescribe the technical work","Standard dual compliance metric (whichever occurs first: 50 flight hours or 180 days) applied to each requirement","Exception: Requirement 2 need not be repeated if previously accomplished","Cross-reference to an FAA Airworthiness Directive (FAA AD 2006-19-10) for related regulatory context","Replacement of one hardware design (break-over bolts) with another (break-over pins) adds a parts-supply and installation dependency","Applicability split across two models and multiple serial-number subranges (creates a modest mapping task for operators)"],"plain_english_summary":"**What this amendment does (mechanically)\n\n- Applies to Cirrus Design SR20 (serials 1005–1600) and SR22 (serials 0002–1727) aeroplanes. (See \"Applicability\".)\n- Requires operators to carry out the work specified in two Cirrus Alert Service Bulletins:\n  - SB 2X-25-17 (Revised 20 Jan 2006) — newly required for all applicable serial numbers listed above; and\n  - SB 2X-25-06 R4 (Revised 5 May 2005) — required only for SR20 s/n 1005–1455 and SR22 s/n 0002–1044, and only if not already done. (See \"Requirement\".)\n- The new action added by this amendment is the replacement of the crew seat \"break-over\" bolts with new break-over pins on both pilot and co‑pilot seats. The directive also retains the earlier required replacement of the crew seat recline locks on both seats. (See \"Background\" and \"Requirement\".)\n- Deadlines: work must be done within 50 flight hours or 180 days (whichever comes first) measured from the specified effective dates: for the new requirement, 23 Nov 2006; for the earlier requirement, 13 Oct 2005. If the work has already been done to the earlier requirement, it does not need to be repeated. (See \"Compliance\" and the two notes in \"Requirement\".)\n\n**Why the change was made (stated purpose)\n\n- The manufacturer reported that, under emergency landing dynamic loads, the crew seats could fold forward at loads lower than the 26 g required by the certification regulations. The stated intent is to prevent seats folding forward during emergency landing loads and so reduce the risk of occupant injury. (See \"Background\".)\n\n**Who pays and who decides\n\n- Aircraft owners/operators are the ones who must arrange and pay for the modifications and any associated maintenance downtime, using parts and procedures in the specified Cirrus Alert Service Bulletins. The Civil Aviation Safety Authority (as issuer) enforces compliance by making the actions mandatory. The manufacturer supplied the service bulletins and the replacement parts (pins) that the AD mandates. (See \"Requirement\" and \"Background\".)\n\n**Practical effects, costs and trade‑offs to consider\n\n- Direct compliance cost: purchase and installation of replacement recline locks and the new break‑over pins, plus labour and any inspection work. Those costs are concentrated on owners/operators of the affected serial numbers.\n- Operational impact: aircraft will be out of service while the work is done; the AD sets a short compliance window (50 flight hours or 180 days), so scheduling could be tight for some operators. (See \"Compliance\".)\n- Parts and supply risk: the amendment requires a specific new part (break‑over pins). If pins are in limited supply or require factory sourcing, that could delay compliance or raise costs.\n- Redundancy/minimisation of rework: the AD explicitly says Requirement 2 (the earlier recline-lock change) need not be reapplied if already done, which reduces unnecessary repeat work. (See \"Requirement\", Note 2.)\n- Implementation discretion: the AD mandates compliance via Cirrus Alert Service Bulletins; authorised maintenance organisations will decide the exact scheduling and installation steps within those procedures. The AD cross‑references an FAA AD (2006-19-10) which may affect interpretation of acceptable compliance records. (See \"Requirement\", Note 1.)\n\n**Trade-offs and substitution effects\n\n- The AD substitutes a mechanical part (pin) for the previous bolt design. That reduces one identified failure mode (forward folding under dynamic load) but introduces dependency on the new part's supply and on correct installation.\n\n**Key references inside the instrument**\n\n- Applicability: affected models and serial numbers.\n- Requirement: which Service Bulletins to follow and which serial ranges they apply to; Note 1 (references FAA AD 2006-19-10) and Note 2 (no need to repeat Requirement 2 if already done).\n- Compliance: 50 flight hours or 180 days deadlines; effective date for the amendment (24 Oct 2006).\n- Background: reason for the directive (seat forward folding under emergency loads).\n\n(Section citations in the document: \"Applicability\", \"Requirement\", \"Compliance\", \"Background\".)"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment stays within the original scope of addressing crew seat structural integrity in emergency landings. It adds a specific hardware modification (break-over pins replacing bolts) but does not expand to new aircraft models, new systems, or new types of safety issues beyond the original dynamic load failure concern."},"complexity_factors":["Two-tier applicability structure requiring cross-referencing of serial number ranges","Two separate service bulletins referenced but not reproduced (external dependencies)","Nested compliance dates with 'whichever occurs first' conditional logic","Exception clause ('unless already accomplished') appearing twice","Amendment structure creates historical layering: Requirement 2 unchanged from original, Requirement 1 is new","Reference to superseded FAA ADs creating parallel regulatory history"],"plain_english_summary":"This CASA Airworthiness Directive orders owners/operators of specified Cirrus SR20 (S/N 1005–1600) and SR22 (S/N 0002–1727) to fix a seat-structure defect: crew seats can fold forward under crash loads below the required standard. It requires replacing break-over bolts with break-over pins on both seats (within 50 flight hours or 180 days after 23 Nov 2006); certain older serials must also have seat recline locks replaced. The work prevents forward collapse and reduces injury risk in emergency landings."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cirrus-4-amdt-1-crew-seats","history":"/api/acts/ad-cirrus-4-amdt-1-crew-seats/history","analysis":"/api/acts/ad-cirrus-4-amdt-1-crew-seats/analysis","conflicts":"/api/acts/ad-cirrus-4-amdt-1-crew-seats/conflicts","importantCases":"/api/acts/ad-cirrus-4-amdt-1-crew-seats/important-cases","documents":"/api/acts/ad-cirrus-4-amdt-1-crew-seats/documents"}}