{"id":"F2009L00059","name":"AD/CESSNA 336/15 - Alternate Static Air Source Selector Valve Placard","slug":"ad-cessna-336-15-alternate-static-air-source-selector-valve-placard","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76471,"registerId":"commonwealth-F2009L00059-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 336 Series Aeroplanes","sectionType":"division","heading":"Cessna 336 Series Aeroplanes","content":"### Cessna 336 Series Aeroplanes\n\n| AD/CESSNA 336/15 | Alternate Static Air SourceSelector Valve Placard | 3/2009 TX |\n| ---------------- | ------------------------------------------------- | --------- |\n\n| Applicability: | Cessna 336 model aeroplanes, that:1. Were initially delivered from the manufacturer between 1 January 1993, and31 March 2008; or2. Have a alternate static air selector valve part number (P/N) 2013142-18 installed as a replacement part anytime after 1 January 1993.Note 1: The affected part was shipped from Cessna Parts Distribution (CPD) between 1 January 1993 and 31 March 2008.Note 2: P/N 2013142-18 replaced P/Ns 2013142-9, -13, and -17.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. For all affected aeroplanes that are not equipped for flight under instrument flight rules (IFR) - Inspect the alternate static air source selector valve to assure that the part number identification placard is not obstructing the port.2. For all affected aeroplanes that are equipped for flight under IFR:a. Inspect the alternate static air source selector valve to assure that the part number identification placard is not obstructing the port; orb. Fabricate a placard that incorporates the following words (using at least1/8-inch letters) and install this placard on the instrument panel within the pilot’s clear view:“IFR OPERATION IS PROHIBITED” and “USE OF THE ALTERNATE STATIC AIR SOURCE IS PROHIBITED.”3. For all affected aeroplanes that are equipped for flight under IFR - If placards were installed in accordance with Requirement 2b of this AD, inspect the alternate static air source selector valve to assure that the part number identification placard is not obstructing the port.After doing the inspection, remove the placards installed in accordance with Requirement 2b of this AD before further flight. |\n\n|             | 4. For all affected aeroplanes - If the alternate static air source selector valve port is found obstructed by the part number identification placard during the inspection detailed in Requirements 1, 2a, and 3 of this AD, remove the placard from the valve body, discard the placard, and assure that the port is open and unobstructed.5. For all affected aeroplanes - When a replacement valve is needed, only install a P/N 2013142-18 alternate static air source selector valve that has been inspected and the port is found free from obstruction.The procedures required to accomplish this AD are detailed in Cessna Single Engine Service Bulletin SB08-34-02, Revision 1, dated 6 October 2008; Cessna Caravan Service Bulletin CAB08-04, Revision 1, dated 6 October 2008; Cessna Single Engine Service Bulletin SEB08-5, dated 13 October 2008; or Cessna Multi-engine Service Bulletin MEB08-6, dated 13 October 2008, as applicable.Note 3: FAA AD 2008-26-10 Amdt 39-15776 dated 15 December 2008 refers. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | For Requirement 1 - Within the next 100 hours time-in-service (TIS) after the effective date of this AD or within the next 4 months after the effective date of this AD, whichever occurs first.For Requirement 2a - Within the next 10 days after the effective date of this AD.For Requirement 2b - Before further flight after the effective date of this AD.For Requirement 3 - Within the next 100 hours TIS after the effective date of this AD or within the next 4 months after the effective date of this AD whichever occurs first.For Requirement 4 - Before further flight after the inspection required in Requirements 1, 2a, and 3 of this AD.For Requirement 5 - As of 10 days after the effective date of this AD.                                                                                                                                                                                                                                                                                             |\n|             | This Airworthiness Directive becomes effective on 16 January 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n| Background: | Reports of improper installation of the part number (P/N) identification placard on P/N 2013142-18 alternate static air source selector valves prompted the issue of several ADs against various models of Cessna aircraft in response to the United States Federal Aviation Administration (FAA) issuing AD 2008-10-02.Since then the FAA has received reports of 15 aeroplanes not previously affected by AD 2008-10-02 with a P/N 2013142-18 installed and the alternate static air source selector valve port was found obstructed by the P/N identification placard.                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n\n|     | The Civil Aviation Safety Authority (CASA) has no way of determining which aeroplanes have the remaining problem alternate static air source selector valve assemblies installed without having all of the affected aeroplanes and spares stock inspected.The FAA has been informed that all P/N 2013142-18 alternate static air source selector valves shipped from Cessna Parts Distribution between 1 January 1993, and 31 March 2008, may have port obstruction caused by the P/N identification placard.This condition, if not corrected, could result in the altimeter, airspeed, and vertical speed indicators displaying erroneous indications. This could cause the pilot to react to incorrect flight information and possibly result in loss of control. |\n| --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n8 January 2009","sortOrder":0},{"sectionNumber":"AD/CESSNA 336/15","sectionType":"part","heading":"AD/CESSNA 336/15","content":"## AD/CESSNA 336/15","sortOrder":1},{"sectionNumber":"Alternate Static Air SourceSelector Valv","sectionType":"part","heading":"Alternate Static Air SourceSelector Valve Placard","content":"## Alternate Static Air Source  \nSelector Valve Placard","sortOrder":2},{"sectionNumber":"3/2009 TX","sectionType":"part","heading":"3/2009 TX","content":"## 3/2009 TX","sortOrder":3}],"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":4,"scope_assessment":{"changed":true,"description":"This AD extends applicability beyond the earlier FAA AD by explicitly targeting all Cessna 336 aeroplanes with P/N 2013142‑18 shipped from 1 January 1993 to 31 March 2008 or having that P/N installed as a replacement after 1 January 1993, after reports of additional affected aircraft (Background). The change broadens the covered population to include spares stock and replacement installations that were not captured previously."},"complexity_factors":["Applicability depends on manufacture/delivery dates and specific part number (P/N 2013142‑18), creating a non‑trivial population to identify (Applicability).","Different obligations based on whether the aeroplane is IFR‑equipped (Requirements 1–3), producing branching compliance paths.","Multiple, differing compliance timeframes (10 days; before next flight; within 100 hours TIS or 4 months), increasing scheduling complexity (Compliance).","Technical inspection task: verify the part‑number placard does not obstruct the valve port and remove/discard obstructing placards (Requirements 1, 3, 4).","Replacement controls: new installations are limited to inspected P/N 2013142‑18 valves free from obstruction, adding parts‑procurement and verification burden (Requirement 5).","Cross‑references to several manufacturer service bulletins and an FAA AD require users to consult external documents for procedures (Requirement notes; Background).","Operational consequence for IFR operators (temporary prohibitions/placards) imposes potential flight‑availability costs until compliance is met (Requirements 2b, 3; Compliance).","Enforcement/traceability challenge: CASA notes inability to determine which aircraft or spare stocks are affected without inspection, implying administrative and inspection burdens (Background)."],"plain_english_summary":"This AD requires owners/operators of certain Cessna 336 aeroplanes fitted with alternate static selector valve P/N 2013142‑18 (shipped 1 Jan 1993–31 Mar 2008 or installed after 1 Jan 1993) to inspect the valve port for obstruction by the part‑number placard and remove any obstructing placard. IFR‑equipped aeroplanes have shorter inspection deadlines and may need a temporary instrument‑panel placard prohibiting IFR/alternate‑static use until the valve is cleared; replacement valves must be inspected before installation."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This AD maintains a narrow, targeted scope addressing a specific defective part (P/N 2013142-18) on a specific aircraft model. The requirements remain tightly focused on the original safety issue: obstructed static air ports causing erroneous flight instrument readings. The IFR/non-IFR distinction and temporary placard option are proportionate risk-management measures rather than scope creep."},"complexity_factors":["Multiple conditional requirement branches based on aircraft equipment type (IFR vs non-IFR)","Nested compliance timelines (different deadlines for different requirements: 10 days, before further flight, 100 hours TIS or 4 months)","Cross-references to four separate Cessna Service Bulletins for procedural details","Specific part number tracking and replacement history requirements","Requirement 2b creates a temporary compliance pathway with subsequent removal requirement (Requirement 3)","Date-based applicability criteria (manufacture windows and replacement part installation dates)"],"plain_english_summary":"This AD requires owners/operators of certain Cessna 336 aeroplanes (delivered 1993–2008 or fitted with the specified alternate static air source selector valve post‑1993) to inspect for a misplaced valve placard that can block a tiny port. A blocked port can corrupt altimeter, airspeed and VSI readings and risk loss of control. IFR aircraft face tighter, faster action including immediate placarding or very prompt inspection; blocked valves must be cleared before further flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-336-15-alternate-static-air-source-selector-valve-placard","history":"/api/acts/ad-cessna-336-15-alternate-static-air-source-selector-valve-placard/history","analysis":"/api/acts/ad-cessna-336-15-alternate-static-air-source-selector-valve-placard/analysis","conflicts":"/api/acts/ad-cessna-336-15-alternate-static-air-source-selector-valve-placard/conflicts","importantCases":"/api/acts/ad-cessna-336-15-alternate-static-air-source-selector-valve-placard/important-cases","documents":"/api/acts/ad-cessna-336-15-alternate-static-air-source-selector-valve-placard/documents"}}