{"id":"F2009L00058","name":"AD/CESSNA 303/14 - Alternate Static Air Source Selector Valve Placard","slug":"ad-cessna-303-14-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":76470,"registerId":"commonwealth-F2009L00058-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna T303 Series Aeroplanes","sectionType":"division","heading":"Cessna T303 Series Aeroplanes","content":"### Cessna T303 Series Aeroplanes\n\n| AD/CESSNA 303/14 | Alternate Static Air SourceSelector Valve Placard | 3/2009 TX |\n| ---------------- | ------------------------------------------------- | --------- |\n\n| Applicability: | Cessna T303 model aeroplanes that:1. Were initially delivered from the manufacturer between 1 January 1993, and31 March 2008, unless the modification/rework required in AD/CESSNA 303/13 has been done and the aeroplane remains in compliance with that AD; or2. Have a alternate static air selector valve part number (P/N) 2013142-18 installed as a replacement part anytime after 1 January 1993, unless the modification/rework required in AD/CESSNA 303/13 has been done and the aeroplane remains in compliance with that AD.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. |\n\n| | After doing the inspection, remove the placards installed in accordance with Requirement 2b of this AD before further flight.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 AD/CESSNA 303/13 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 303/14","sectionType":"part","heading":"AD/CESSNA 303/14","content":"## AD/CESSNA 303/14","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":{"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope addressing a specific defective part on a specific aircraft model. It does not expand beyond the Cessna T303 series or the P/N 2013142-18 valve issue."},"complexity_factors":["Multiple conditional requirement branches based on aircraft equipment type (IFR vs non-IFR)","Cross-reference to prior directive AD/CESSNA 303/13 for exemption criteria","Nested compliance timelines (10 days vs 100 hours/4 months vs before further flight)","Circular logic in Requirement 3 (inspect after installing placard, then remove placard)","Specific part number tracking (P/N 2013142-18) with replacement history going back to 1993","Reference to four separate Cessna Service Bulletins for procedural details","Dual applicability criteria (manufacture date vs replacement part installation)"],"plain_english_summary":"Certain Cessna T303 aircraft (those delivered 1993–2008 or fitted with valve P/N 2013142‑18 after 1993) must address a manufacturing defect where the alternate static air source selector valve’s ID label can block a port and cause false altimeter/airspeed/vertical speed indications. CASA requires prompt inspection, temporary IFR restrictions or placarding for instrument-equipped aircraft, and removal of any blocking label before further flight. This is a safety-critical fix to prevent instrument errors and loss of control in IMC."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Compared with the earlier AD referenced (AD/CESSNA 303/13), this directive expands applicability to Cessna T303 aeroplanes with P/N 2013142‑18 shipped from 1 Jan 1993–31 Mar 2008 or installed later, and imposes mandatory inspections, placard removal if obstructing, temporary IFR prohibition options, and a restriction that replacement valves must be inspected before installation. The AD targets previously uninspected valve assemblies reported after the prior AD (Background) and therefore broadens the corrective population and remedies."},"complexity_factors":["Differentiated requirements for IFR‑equipped versus non‑IFR aeroplanes (Requirements 1–3)","Multiple timetables for compliance (10 days; before further flight; within 100 hours TIS or 4 months)","Applicability defined by delivery dates, part number history, and prior compliance with AD/CESSNA 303/13","Operational restriction option (temporary placard prohibiting IFR/use of alternate static source) vs immediate inspection","Replacement restriction requiring only inspected P/N 2013142‑18 valves be installed (Requirement 5)","Dependence on external service bulletins for procedural detail (multiple Cessna SBs referenced)","Enforcement and verification responsibility vested in operators with CASA oversight"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Cessna T303 aeroplanes fitted with alternate static air selector valve P/N 2013142‑18 (shipped 1 Jan 1993–31 Mar 2008 or installed later) to inspect the valve for a part‑number placard blocking the port, remove any obstructing placard, and limit replacements to inspected, unobstructed valves (Requirements 1–5).\n\nFor IFR‑equipped aeroplanes the AD also allows temporary instrument‑panel placards forbidding IFR operation and use of the alternate static source until inspection (Requirement 2); owners/operators bear inspection, placard and potential grounding costs, and CASA enforces compliance."},"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-cessna-303-14-alternate-static-air-source-selector-valve-placard","history":"/api/acts/ad-cessna-303-14-alternate-static-air-source-selector-valve-placard/history","analysis":"/api/acts/ad-cessna-303-14-alternate-static-air-source-selector-valve-placard/analysis","conflicts":"/api/acts/ad-cessna-303-14-alternate-static-air-source-selector-valve-placard/conflicts","importantCases":"/api/acts/ad-cessna-303-14-alternate-static-air-source-selector-valve-placard/important-cases","documents":"/api/acts/ad-cessna-303-14-alternate-static-air-source-selector-valve-placard/documents"}}