{"id":"F2006B02024","name":"AD/AA-1/13 - Stall and Spin Placards - Installation","slug":"ad-aa-1-13-stall-and-spin-placards-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41246,"registerId":"commonwealth-F2006B02024-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AA-1/13 - Stall and Spin Placards - Installation","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) \nGulfstream (Grumman American/ American Aviation) AA-1 Series Aeroplanes\n\nAD/AA-1/13 Stall and Spin Placards \\- Installation 8/73\n\nApplicability: All models.\n\nRequirement: 1. Install a placard on the instrument panel in full view of the pilot stating “SPINS PROHIBITED”.\n\n2. Install a placard worded as follows, and as applicable on the instrument panel adjacent to the Airspeed Indicator.\n\n```html\n

Model AA-1A

Model AA-1B

STALL SPEED KTS. IAS.

STALL SPEED KTS. IAS.

Bank Angle

Bank Angle

Condition

0

20

40

60

Condition

0

20

40

60

Flaps Up

54

56

62

76

Flaps Up

56

58

64

79

Flaps Down

52

54

59

74

Flaps Down

53

55

61

75

1500 lbs Power Off

1560 lbs Power Off

\n```\n\nCompliance: Before 5 September 1973.","sortOrder":0}],"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":2,"scope_assessment":{"changed":false,"description":"The AD prescribes specific placard installations for all AA‑1 models and sets an operational prohibition. The text contains no provision that broadens or narrows the stated applicability; it therefore does not indicate a change in scope from the directive's expressed requirements."},"complexity_factors":["Simple, prescriptive physical requirement: install two placards (Requirement 1 and 2).","Includes a detailed stall‑speed table covering model, flap, bank angle and weight configurations—technical but static.","Universal applicability: applies to all AA‑1 models (no case‑by‑case exemptions).","Fixed historical compliance date reduces ongoing regulatory interaction.","Operational effect: changes pilot permitted maneuvers (prohibits spins), creating modest training/operational impact."],"plain_english_summary":"Mechanically: requires two placards on Gulfstream (Grumman American) AA‑1 series instrument panels—one stating “SPINS PROHIBITED” and one showing model‑specific stall speeds beside the airspeed indicator. It applies to all AA‑1 models and carried a compliance date of 5 September 1973. Aircraft owners/operators pay to fit the placards; pilots receive an explicit operational prohibition on spins and numeric stall‑speed guidance. The measure is a low‑cost safety directive that changes pilot behaviour and training/practice choices."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-purpose safety directive. It has not expanded beyond its original intent of mandating specific cockpit warning placards for stall and spin prevention in the AA-1 aircraft series. The scope remains tightly focused on the original safety concern."},"complexity_factors":["Very short document (under 500 words)","Only 2 substantive requirements with clear, specific instructions","Single defined applicability (all AA-1 series models)","No cross-references to other legislation or regulations","No conditional logic, exceptions, or nested provisions","Technical complexity limited to a single data table with straightforward stall speed values","Plain language directive with minimal aviation jargon (terms like 'placard', 'IAS', and 'flaps' are standard operational terms for the target audience)"],"plain_english_summary":"Owners and operators of Gulfstream/Grumman American AA-1 series aeroplanes in Australia must install cockpit warning placards prohibiting intentional spins and showing stall-speed references next to the airspeed indicator. This mandatory CASA Airworthiness Directive addresses the AA‑1’s hazardous stall/spin characteristics to prevent unrecoverable spins and provide critical speed info to avoid stalls. Compliance was required by 5 September 1973."}},"importantCases":[],"_links":{"self":"/api/acts/ad-aa-1-13-stall-and-spin-placards-installation","history":"/api/acts/ad-aa-1-13-stall-and-spin-placards-installation/history","analysis":"/api/acts/ad-aa-1-13-stall-and-spin-placards-installation/analysis","conflicts":"/api/acts/ad-aa-1-13-stall-and-spin-placards-installation/conflicts","importantCases":"/api/acts/ad-aa-1-13-stall-and-spin-placards-installation/important-cases","documents":"/api/acts/ad-aa-1-13-stall-and-spin-placards-installation/documents"}}