{"id":"F2008L01361","name":"AD/CESSNA 208/22 - Alternate Static Air Source Valve","slug":"ad-cessna-208-22-alternate-static-air-source-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":73619,"registerId":"commonwealth-F2008L01361-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 208 Series Aeroplanes","sectionType":"division","heading":"Cessna 208 Series Aeroplanes","content":"### Cessna 208 Series Aeroplanes\n\n| AD/CESSNA 208/22 | Alternate Static Air Source Valve | 7/2008 TX |\n| ---------------- | --------------------------------- | --------- |\n\n```html\n

Applicability:

Aeroplanes models listed in Table 1 and Table 2 that have an alternate static air source selector valve, part number (P/N) 2013142-18, installed after 19 November 2007.

Note 1: Aircraft listed in Table 1 had an alternate static air source selector valve, P/N 2013142-18, installed during manufacture but may have also had the affected part installed as a replacement part.

Table 1 - Applicability for Aeroplanes that Had the
Affected Part Installed at Manufacture

Model

Serial Numbers

208
208B

20800417, 20800418 and 20800419
208B1294 through 208B1310

Table 2 - 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)

208
208B

20800001 through 20800416
208B0001 through 208B1293

Note 2: P/N 2013142-18 replaced P/Ns 2013142-9, -13 and -17.

Requirement:

1. For aeroplanes listed in Table 1 - 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.

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\n| | 2. For aeroplanes listed in Table 2 - Either: |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | a. Inspect the alternate static air source selector valve in accordance with Requirement 1, or |\n| | 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. |\n| | Note 3: The Requirement 2.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. |\n| | 3. If the Requirement 2.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 1. |\n| | 4. If, during any requirement 1 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 1 prior to installation. |\n| | Note 4: 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\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| ----------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\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| | 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. Aeroplanes that may have had the selector valve installed during manufacture will still have to be inspected. |\n\n![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n6 May 2008","sortOrder":0},{"sectionNumber":"AD/CESSNA 208/22","sectionType":"part","heading":"AD/CESSNA 208/22","content":"## AD/CESSNA 208/22","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":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"CASA narrowed the physical-inspection burden for some affected aeroplanes by allowing operators of aircraft in Table 2 to verify whether P/N 2013142-18 was installed by checking maintenance records instead of mandating a physical inspection (Requirement 2.b; Note 3). Aircraft listed in Table 1 (manufacture-installed) still require a physical inspection (Requirement 1). The variation shifts some compliance effort onto operators and records systems while leaving manufacture-installed cases unchanged."},"complexity_factors":["Specific part-based scope: applies only to selector valve P/N 2013142-18 (multiple replaced P/Ns noted) — requires part-number-level identification.","Model and serial-range specificity: different obligations for aircraft in Table 1 (manufacture-installed) versus Table 2 (could be replacement/spare).","Conditional compliance paths: Table 2 operators may either physically inspect or inspect maintenance records to determine if the part was installed (Requirement 2 and 2.b).","Operator self-certification allowed: Note 3 permits the aeroplane operator to certify the records check if they hold at least a private pilot licence — shifts responsibility from maintenance organisation to operator.","Timing constraint: inspections and corrective action are mandated 'before further flight' (Compliance), imposing immediate operational impact.","Installation control: new or replacement valves installed on/after effective date must be inspected prior to installation (Requirement 5) — affects maintenance workflows and parts handling.","Interagency cross-reference: cites FAA AD 2008-10-02 (Note 4), creating dependence on foreign AD information for background and corrective history."],"plain_english_summary":"This directive requires operators of certain Cessna 208 series aeroplanes that may have an alternate static air source selector valve P/N 2013142-18 installed after 19 November 2007 to inspect that valve so the part-number placard does not block the valve’s static-air port. Operators must correct any obstruction before further flight. The rule targets aircraft and spare parts listed in Tables 1–2 because a blocked port can make altimeter, airspeed and vertical speed instruments give wrong readings, creating a flight-safety hazard."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original scope as a targeted safety directive addressing a specific manufacturing defect in a particular part number installed on specific Cessna 208 aircraft. The variation mentioned in the Background (allowing records checks for Table 2 aircraft) is a procedural flexibility within the original safety purpose, not an expansion of scope."},"complexity_factors":["Two-tier applicability structure (Table 1 vs Table 2) with different compliance paths","Nested conditional logic: Requirement 2 offers alternative compliance methods (2a physical inspection vs 2b records check), with Requirement 3 triggering back to Requirement 1 if 2b finds an installation","Cross-reference to FAA AD 2008-10-02 Amdt 39-15508","Specific part number tracking (P/N 2013142-18) with manufacturing date cutoffs (20 Nov 2007 - 18 Feb 2008)","Delegated authority provision allowing private pilots to certify records inspections (Note 3)","Multiple compliance dates tied to different requirements and events (effective date, post-inspection, pre-installation)"],"plain_english_summary":"This AD requires owners/operators of specified Cessna 208/208B aeroplanes to inspect the alternate static air source selector valve because some valves (made Nov 2007–Feb 2008) had the part‑number label stuck over the air inlet, blocking it and risking false altimeter/airspeed/vertical‑speed readings. Affected aircraft must have the valve checked (or maintenance records checked for post‑19 Nov 2007 replacements); if blocked, remove/discard the label before the next flight. Inspections required before flight after 13 May 2008."},"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-208-22-alternate-static-air-source-valve","history":"/api/acts/ad-cessna-208-22-alternate-static-air-source-valve/history","analysis":"/api/acts/ad-cessna-208-22-alternate-static-air-source-valve/analysis","conflicts":"/api/acts/ad-cessna-208-22-alternate-static-air-source-valve/conflicts","importantCases":"/api/acts/ad-cessna-208-22-alternate-static-air-source-valve/important-cases","documents":"/api/acts/ad-cessna-208-22-alternate-static-air-source-valve/documents"}}