{"id":"F2009L00516","name":"AD/PA-46/34 - Stall Warning Heat Control","slug":"ad-pa-46-34-stall-warning-heat-control","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":77180,"registerId":"commonwealth-F2009L00516-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-46 (Malibu) Series Aeroplanes","sectionType":"division","heading":"Piper PA-46 (Malibu) Series Aeroplanes","content":"### Piper PA-46 (Malibu) Series Aeroplanes\n\n| AD/PA-46/34 | Stall Warning Heat Control | 3/2009 |\n| ----------- | -------------------------- | ------ |\n\n```html\n

Applicability:

PA-46 models and serial numbers as follows:

Model

Serial Numbers

PA-46-350P
PA-46R-350T
PA-46-500TP

4622001 through 4622200 and 4636001 through 4636445
4692001 through 4692054
4697001 through 4697365

Requirement:

Install Stall Warning Heat Control Modification Kit, Piper part number 88452-002 as specified in Piper Mandatory Service Bulletin (MSB) 1192, dated
15 September 2008, following Drawing 88452, dated 19 June 2008.

Later revisions of the above MSB and drawing, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2008-26-011 are considered acceptable for compliance with the equivalent Requirements of this Directive.

Note: FAA AD 2008-26-11 Amdt 39-15777 refers.

Compliance:

Within the next 100 hours time in service after the effective date of this Directive.

This Airworthiness Directive becomes effective on 12 March 2009.

Background:

The FAA has advised that ice forming on the stall vane heater during flights into icing conditions with the landing gear down may result in failure of the stall warning system and the pilot being unaware of an approaching stall situation. This Directive requires the installation of a stall warning heat control modification kit to prevent ice from forming on the stall vane.

\n```\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n27 January 2009","sortOrder":0},{"sectionNumber":"AD/PA-46/34","sectionType":"part","heading":"AD/PA-46/34","content":"## AD/PA-46/34","sortOrder":1},{"sectionNumber":"Stall Warning Heat Control","sectionType":"part","heading":"Stall Warning Heat Control","content":"## Stall Warning Heat Control","sortOrder":2},{"sectionNumber":"3/2009","sectionType":"part","heading":"3/2009","content":"## 3/2009","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive stays within the original safety objective: require installation of a specific stall‑vane heater control modification for listed PA‑46 serial numbers to prevent icing-related stall warning failure. It specifies the exact kit and MSB/drawing and accepts FAA‑approved AMOCs; it does not broaden the affected fleet or add unrelated obligations."},"complexity_factors":["Narrow applicability to specific PA‑46 models and serial number ranges (Applicability).","Mandated hardware and documentation: Piper modification kit p/n 88452‑002, MSB 1192 and Drawing 88452 (Requirement).","Reliance on FAA-approved later revisions as acceptable AMOCs creates dependence on external regulator decisions (\"Later revisions\" / Note).","Short compliance window: within the next 100 hours time in service (Compliance).","Operational impacts: parts availability, scheduling of maintenance, and cost borne by owners/operators (Requirement / Compliance).","Cross-jurisdictional alignment: references FAA AD 2008-26-11 as the related directive (Background / Note).","Installation is safety‑critical and requires qualified maintenance organisations to follow detailed MSB/drawing instructions (Requirement / Background).","Administrative burden to record and demonstrate compliance for continuing airworthiness (Compliance)."],"plain_english_summary":"This Directive requires owners/operators of specified Piper PA‑46 (Malibu) serial numbers to install a Stall Warning Heat Control Modification Kit (Piper part no. 88452‑002) per Piper MSB 1192 and Drawing 88452. Owners pay for parts and installation; maintenance organisations carry out the work.\n\nThe work must be completed within the next 100 hours time in service. The stated purpose is to stop ice forming on the stall vane heater that could disable the stall warning during gear‑down icing conditions."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive addressing a specific safety defect in specific aircraft. The scope remains tightly focused on the stall warning heater modification as originally intended."},"complexity_factors":["Single, specific technical requirement with clear part number reference","Limited applicability — only three specific aircraft models with defined serial number ranges","Straightforward compliance deadline (100 hours time in service)","Single cross-reference to FAA AD 2008-26-011 for alternative compliance methods","No nested conditions, exceptions, or defined terms section","Document is essentially a completed form/template with standard AD structure"],"plain_english_summary":"This CASA Airworthiness Directive mandates owners/operators of certain Piper PA‑46 Malibu/Mirage/Meridian aircraft (roughly 1990s–2000s production) to install modification kit 88452‑002 to improve stall‑vane heater control. \n\nIce buildup can silence the stall warning with gear down, risking loss of control; the kit must be installed per the service bulletin within 100 flight hours. The AD took effect 12 March 2009 and non‑compliance grounds the aircraft."},"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-pa-46-34-stall-warning-heat-control","history":"/api/acts/ad-pa-46-34-stall-warning-heat-control/history","analysis":"/api/acts/ad-pa-46-34-stall-warning-heat-control/analysis","conflicts":"/api/acts/ad-pa-46-34-stall-warning-heat-control/conflicts","importantCases":"/api/acts/ad-pa-46-34-stall-warning-heat-control/important-cases","documents":"/api/acts/ad-pa-46-34-stall-warning-heat-control/documents"}}