{"id":"F2008L01362","name":"AD/CESSNA 207/39 - Alternate Static Air Source Valve","slug":"ad-cessna-207-39-alternate-static-air-source-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":73621,"registerId":"commonwealth-F2008L01362-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 207/39 | Alternate Static Air Source Valve | 7/2008 TX |\n| ---------------- | --------------------------------- | --------- |\n\n```html\n

Applicability:

Aeroplanes models listed in Table 1 that have an alternate static air source selector valve, part number (P/N) 2013142-18, installed after 19 November 2007.

Table 1--Applicability for Aeroplanes that Could Have Had the Affected
Part Installed as a Replacement Part or From Parts Held as Spares

Model

Serial Numbers (S/N)

207

All S/Ns

Note 1: P/N 2013142-18 replaced P/Ns 2013142-9, -13 and -17.

Requirement:

1. For aeroplanes listed in Table 1 - Either:

a. Inspect the alternate static air source selector valve in accordance with Requirement 3, or

b. Inspect the aeroplane’s maintenance records to determine if the alternate static air source selector valve has been replaced since 19 November 2007 with P/N 2013142-18, if the valve has not been replaced no further action is necessary.

Note 2: The Requirement 1.b. inspection and determination may be accomplished and certified for by the aeroplane operator, provided that they hold at least a private pilot’s licence.

2. If the Requirement 1.b. determination indicates that a P/N 2013142-18 alternate static air source selector valve has been installed inspect the valve in accordance with Requirement 3.

3. Inspect the alternate static air source selector valve to assure that the part number identification placard is not obstructing the port as follows:

a. Adjust the pilot and copilot seats as far aft as possible.

\n```\n\n| | b. Use a flashlight and mirror to inspect the alternate static air source selector valve to assure the port on the forward end of the valve is clearly visible and not covered by the part number identification placard. |\n| ----------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | 4. If, during any Requirement 3 inspection, the alternate static air source selector valve port is found obstructed by the part number identification placard, remove the placard from the valve body, discard the placard and assure that the port is open and unobstructed. |\n| | 5. Static air source selector valves P/N 2013142-18 installed as modification or replacement parts on or after the effective date of this Directive must be inspected in accordance with Requirement 3 prior to installation. |\n| | Note 3: FAA AD 2008-10-02 Amdt 39-15508, which becomes effective on 12 May 2008, refers. |\n| Compliance: | For Requirements 1, 2 and 3 - Before further flight after the effective date of this Directive. |\n| | For Requirement 4 - Before further flight after the Requirement 1 inspection. |\n| | For Requirement 5 - As of the effective date of this Directive. |\n| | This Airworthiness Directive becomes effective on 13 May 2008. |\n| Background: | The United States Federal Aviation Administration (FAA) has received reports of improper installation of the part number identification placard on alternate static air source selector valves of certain Cessna 172, 175, 180, 182, 185, 206, 207, 208, 210 and 303 series aeroplanes. The part number identification placard refers to alternative air source selector valves, part number 2013142-18, that were manufactured between 20 November 2007 and 18 February 2008. The part number identification placard was installed on the valve body in a location that covers the port, which is the inlet for static air reference into the valve. The problem was discovered during a quality control check. |\n| | The FAA has advised that all parts held in stock at Cessna have been corrected and that Cessna has no way of verifying how many of these assemblies were manufactured and sent to the field with the part number identification placard installed over the alternate static air source selector valve port. 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. |\n| | 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| | CASA has varied the inspection requirements to allow the aeroplane operator to determine if a P/N 2013142-18 selector valve has been installed since 19 November 2007. |\n| --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n6 May 2008","sortOrder":0},{"sectionNumber":"AD/CESSNA 207/39","sectionType":"part","heading":"AD/CESSNA 207/39","content":"## AD/CESSNA 207/39","sortOrder":1},{"sectionNumber":"Alternate Static Air Source Valve","sectionType":"part","heading":"Alternate Static Air Source Valve","content":"## Alternate Static Air Source Valve","sortOrder":2},{"sectionNumber":"7/2008 TX","sectionType":"part","heading":"7/2008 TX","content":"## 7/2008 TX","sortOrder":3}],"analysis":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD remains tightly scoped to its original safety purpose: addressing a specific manufacturing defect in a single part number installed on Cessna 207 aircraft. The variation allowing pilot-performed records checks is a pragmatic relaxation of the inspection burden, not an expansion of scope."},"complexity_factors":["Single technical subject matter (one valve type on one aircraft series)","Clear sequential requirements (numbered 1-5) with simple conditional logic (if/then)","Only one defined part number (P/N 2013142-18) and one date threshold (19 November 2007)","Two alternative compliance paths provided (physical inspection vs. records check)","Minimal cross-referencing (only one reference to FAA AD 2008-10-02 in a note)","Straightforward compliance dates tied to 'before further flight' or effective date","No nested exceptions or complex definitional sections"],"plain_english_summary":"Owners/operators of Cessna 207 aeroplanes must inspect (or check maintenance records for) alternate static air source selector valves of part number 2013142-18 installed after 19 Nov 2007. Some valves were shipped with an ID label blocking the air intake, which can cause false altimeter, airspeed and vertical speed indications and risk loss of control.\n\nIf the label blocks the port, remove it before the next flight. This AD takes effect 13 May 2008."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"CASA varied the FAA-originated inspection requirement by permitting operators to first inspect maintenance records to determine whether the affected P/N 2013142-18 was installed since 19 November 2007, and by allowing a holder of at least a private pilot licence to certify that determination (Requirement 1.b; Note 2). This narrows immediate physical-inspection scope for cases with clear records but retains mandatory physical inspection and placard removal where records indicate the part was fitted, and requires pre-install inspection for parts installed on or after the Directive’s effective date (Requirements 2–5)."},"complexity_factors":["Narrow technical scope: single aircraft model (Cessna 207) and specific part number (P/N 2013142-18).","Simple, discrete actions required: visual inspection using flashlight/mirror, seat adjustment, and placard removal if obstructing (Requirement 3–4).","Binary compliance option: either inspect maintenance records or perform physical inspection (Requirement 1.a–b; Note 2) — lowers operational complexity but creates record-verification responsibility.","Time-critical compliance: actions must be completed before further flight after the Directive’s effective date (Compliance section).","Pre-installation obligation: new/modified valves installed on/after effective date require inspection before installation (Requirement 5).","Delegated certification: allows aeroplane operator with at least a private pilot licence to certify the records check (Note 2) — adds permissive discretion but also potential variable reliability.","Traceability burden: operators must determine whether the specific P/N was installed since 19 Nov 2007, which may require review of historic maintenance and spare-parts records (Applicability and Background).","Cross-reference to FAA AD may require consultation of external document for full context (Note 3 / Background)."],"plain_english_summary":"This Directive requires operators of Cessna 207 aeroplanes with alternate static air source selector valve P/N 2013142-18 (installed after 19 November 2007) to confirm the valve’s inlet port is not blocked by the part-number placard and to remove and discard the placard if it is. Inspections must be done before further flight; operators may first check maintenance records (and a holder of at least a private pilot licence may certify that check). The measure addresses risk of erroneous flight instruments caused by a blocked static port."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-207-39-alternate-static-air-source-valve","history":"/api/acts/ad-cessna-207-39-alternate-static-air-source-valve/history","analysis":"/api/acts/ad-cessna-207-39-alternate-static-air-source-valve/analysis","conflicts":"/api/acts/ad-cessna-207-39-alternate-static-air-source-valve/conflicts","importantCases":"/api/acts/ad-cessna-207-39-alternate-static-air-source-valve/important-cases","documents":"/api/acts/ad-cessna-207-39-alternate-static-air-source-valve/documents"}}