{"id":"F2009L00055","name":"AD/CESSNA 207/40 - Alternate Static Air Source Selector Valve Placard","slug":"ad-cessna-207-40-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":76464,"registerId":"commonwealth-F2009L00055-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 207 Series Aeroplanes","sectionType":"division","heading":"Cessna 207 Series Aeroplanes","content":"### Cessna 207 Series Aeroplanes\n\n| AD/CESSNA 207/40 | Alternate Static Air SourceSelector Valve Placard | 3/2009 TX |\n| ---------------- | ------------------------------------------------- | --------- |\n\n```html\n

Applicability:

Aeroplane models listed in Table 1 of this AD, that:

1. Were initially delivered from the manufacturer between 1 January 1993, and
31 March 2008, unless the modification/rework required in AD/CESSNA 207/39 has been done and the aeroplane remains in compliance with that AD; or

2. 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 207/39 has been done and the aeroplane remains in compliance with that AD.

Table 1 - Aeroplanes that Could Have the Affected Part Installed

207

207A

T207

T207A

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.

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; or

b. Fabricate a placard that incorporates the following words (using at least
1/8-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.”

\n```\n\n| | 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.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\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 207/39 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.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 207/40","sectionType":"part","heading":"AD/CESSNA 207/40","content":"## AD/CESSNA 207/40","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":{"complexity_score":6,"scope_assessment":{"changed":true,"description":"This AD expands scope beyond earlier actions by covering aeroplanes with P/N 2013142-18 shipped from Cessna Parts Distribution between 1 Jan 1993 and 31 Mar 2008 and aircraft that received that part as a replacement after 1 Jan 1993, including 15 additional aeroplanes the FAA identified. It retains an exception where AD/CESSNA 207/39 has been complied with, but otherwise broadens the population requiring inspection, placarding or removal and restricts future installations to inspected parts."},"complexity_factors":["Multiple applicability rules: applies to aircraft delivered 1 Jan 1993–31 Mar 2008 and to aircraft fitted with P/N 2013142-18 as a replacement part (unless compliant with AD/CESSNA 207/39).","Conditional requirements based on IFR equipage: different actions (inspect vs. placard) for IFR vs non‑IFR aircraft (Requirement 1; Requirement 2a/2b).","Staged and varied compliance timeframes: 10 days, before next flight, or within 100 hours TIS/4 months depending on the requirement.","Interaction with prior AD and service bulletins: compliance depends on AD/CESSNA 207/39 and referenced Cessna service bulletins (SB08-34-02 Rev 1, CAB08-04 Rev 1, SEB08-5, MEB08-6).","Parts control restriction: new installations limited to inspected P/N 2013142-18 valves found free from obstruction (Requirement 5).","Operational disruption risk: temporary IFR prohibition option creates immediate operational constraints until inspections or removals are completed.","Verification burden: operators must determine if specific valves were shipped from CPD between set dates and may need to inspect spares and installed parts.","Compliance sequencing: if temporary placards are used (Requirement 2b), a subsequent inspection and mandatory removal of those placards is required before further flight (Requirement 3)."],"plain_english_summary":"Mandates inspection and, if necessary, removal or placarding of the alternate static air source selector valve placard on certain Cessna 207 models so the valve port is not blocked. For IFR‑equipped aeroplanes it requires either inspection or an instrument‑panel placard prohibiting IFR and use of the alternate static source until corrected; obstructing placards must be removed and only inspected valves (P/N 2013142-18) may be fitted. Owners/operators pay for inspections, corrections and replacements; CASA enforces the deadlines."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific manufacturing defect in a specific valve part on specific Cessna 207 series aircraft. While it references prior ADs and service bulletins, this is standard aviation safety practice for tracking recurring or related defects, not scope creep."},"complexity_factors":["Multiple conditional applicability criteria (manufacture date ranges, replacement part installation dates, exemption for prior AD compliance)","Different requirements based on aircraft equipment type (IFR vs non-IFR)","Nested alternative compliance paths (Requirement 2a OR 2b, with Requirement 3 creating a sequential dependency)","Multiple compliance timeframes varying by requirement (10 days, before further flight, 100 hours/4 months, as of specific date)","Cross-reference to prior AD (AD/CESSNA 207/39) for exemption determination","Reference to four separate Cessna service bulletins for procedures","Specific part number tracking (P/N 2013142-18) with replacement history (replaced P/Ns 2013142-9, -13, -17)"],"plain_english_summary":"This AD mandates inspection and correction of a specific alternate static air source selector valve (P/N 2013142-18) on certain Cessna 207/207A/T207/T207A aeroplanes because a misplaced part label can block a tiny port and give false altimeter/airspeed/vertical speed indications. \n\nIt affects aircraft delivered new 1993–2008 or fitted with that valve since 1993; operators must inspect or restrict IFR use and remove any obstructing label to prevent misleading flight instrument readings and potential loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-207-40-alternate-static-air-source-selector-valve-placard","history":"/api/acts/ad-cessna-207-40-alternate-static-air-source-selector-valve-placard/history","analysis":"/api/acts/ad-cessna-207-40-alternate-static-air-source-selector-valve-placard/analysis","conflicts":"/api/acts/ad-cessna-207-40-alternate-static-air-source-selector-valve-placard/conflicts","importantCases":"/api/acts/ad-cessna-207-40-alternate-static-air-source-selector-valve-placard/important-cases","documents":"/api/acts/ad-cessna-207-40-alternate-static-air-source-selector-valve-placard/documents"}}