{"id":"F2008L01358","name":"AD/CESSNA 180/93 - Alternate Static Air Source Valve","slug":"ad-cessna-180-93-alternate-static-air-source-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":73613,"registerId":"commonwealth-F2008L01358-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 180, 182 and Wren 460 Series Aero","sectionType":"division","heading":"Cessna 180, 182 and Wren 460 Series Aeroplanes","content":"### Cessna 180, 182 and Wren 460 Series Aeroplanes\n\n| AD/CESSNA 180/93 | 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

182T
T182T

18282062 and 18282065
T18208822 and T18208828

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)

180
182
182S
182T
R182
T182
TR182
T182T
F182P
F182Q
FR182

All S/Ns
All S/Ns
18280001 through 18280944
18280945 through 18282061
All S/Ns
All S/Ns
All S/Ns
T18208001 through T18208821
All S/Ns
All S/Ns
All S/Ns

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

\n```\n\n| 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: |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | a. Adjust the pilot and copilot seats as far aft as possible. |\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| | 2. For aeroplanes listed in Table 2 - Either: |\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\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| | 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 180/93","sectionType":"part","heading":"AD/CESSNA 180/93","content":"## AD/CESSNA 180/93","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":3,"scope_assessment":{"changed":false,"description":"The directive stays narrowly focused on locating and removing a misplaced part-number placard that can obstruct the static-air inlet on a specific valve type (P/N 2013142-18). CASA’s variation allowing operators to use a maintenance-records check for certain serial-numbered aircraft (Table 2, Requirement 2.b and Note 3) narrows the immediate inspection burden for those operators but does not broaden the substantive scope of the requirement beyond its original safety purpose. No significant new obligations or broader regulatory aims have been added in this version."},"complexity_factors":["Two applicability tables (Table 1: aircraft with affected part possibly installed at manufacture; Table 2: aircraft that could have the part as replacement/spare).","Single clearly-identified affected part number (P/N 2013142-18) and cross-referenced replaced part numbers (2013142-9, -13 and -17).","Simple conditional paths: Requirement 1 (physical inspection) vs Requirement 2 (either physical inspection or records check).","Short, specific procedural steps (seat position, use of flashlight and mirror) rather than technical repair instructions.","One special certification allowance (Note 3 permitting an operator with a private pilot licence to certify the records inspection).","Compliance timing clauses (before further flight for several requirements) and a pre-install inspection requirement for later installations (Requirement 5).","Cross-reference to FAA AD 2008-10-02 in Note 4 and Background information describing manufacturing date range for affected parts."],"plain_english_summary":"**What this directive does (mechanically)**\n\n- It requires a one-time physical inspection of the alternate static air source selector valve (part number P/N 2013142-18) on certain Cessna 180/182 and Wren 460 series aeroplanes, to make sure the part number identification placard is not blocking the valve port (the inlet for static air).\n- If the placard is found obstructing the port, the placard must be removed and discarded and the port must be left unobstructed (Requirement 4).\n- For some aeroplanes (Table 2), instead of a physical inspection, the operator may inspect maintenance records to confirm whether the valve P/N 2013142-18 was installed since 19 November 2007; if no such valve was installed, no further action is required (Requirement 2.b and Note 3).\n- Any P/N 2013142-18 valves installed as a modification or replacement on or after the directive’s effective date must be inspected before installation (Requirement 5).\n- All required inspections must be completed before the next flight after the directive’s effective date (Compliance: Requirements 1, 2 and 3); if an inspection from Requirement 1 reveals an obstruction, the removal must be completed before further flight (Compliance: Requirement 4).\n\n**Who this affects**\n\n- Owners and operators of the specific Cessna 180, 182 and Wren 460 series aeroplanes listed in Table 1 and Table 2.\n- Maintenance personnel and certificated pilots who hold at least a private pilot licence (Note 3 permits the aeroplane operator with a private pilot licence to perform the records inspection and certify it where allowed).\n- Any organisation installing P/N 2013142-18 valves after the directive’s effective date (they must inspect the part prior to installation).\n\n**Why it matters (official purpose and practical implications)**\n\n- The stated safety reason (Background) is that some P/N 2013142-18 valves were shipped with the part-number placard installed over the static port, which can block the static-air inlet. If the static system is blocked, the altimeter, airspeed and vertical speed indicators can give incorrect readings. The directive aims to locate and unblock any such installations to avoid erroneous flight instruments.\n\n**Costs, incentives and trade-offs**\n\n- Direct costs: time for inspection and, if necessary, removal of the placard. This is a low-material-cost action (the placard is discarded) but imposes labour time on operators or maintenance personnel.\n- Incentives: Operators have an incentive to inspect promptly because the directive requires completion before further flight; maintenance organisations have an incentive to check spares stocks and new parts prior to installation (Requirement 5).\n- Administrative trade-off: CASA allowed a records-based alternative for aircraft in Table 2 (Requirement 2.b and Note 3), which reduces inspection burden for operators who can reliably show the valve was not installed since 19 November 2007, shifting the effort from physical inspection to paperwork review.\n- Implementation risk: The directive relies on correct identification of P/N 2013142-18 and accurate maintenance records; mis-identification or incomplete records could leave an obstructed valve undetected.\n- Compliance burden distribution: The cost is concentrated on the aircraft owner/operator and the installing organisation; the benefit (reduced risk of instrument error) accrues to pilots and passengers.\n\n**Who pays, who decides, and what behaviour changes**\n\n- Who pays: aircraft owners/operators and whoever performs the inspection (maintenance provider or operator). There is no direct fee or replacement-part cost specified other than disposal of the placard.\n- Who decides: the operator must ensure compliance; for Table 2 aircraft the operator can choose a records check (and certify it if they hold a private pilot licence) or perform the physical inspection.\n- Behaviour changes required: inspect valve ports before further flight, remove obstructing placards, inspect any new/installed P/N 2013142-18 before fitting, and retain any records required to show compliance when the records option is used.\n\n**Cross-references and notes**\n\n- The directive references FAA AD 2008-10-02 (Note 4) and explains the affected valves were manufactured in a specified date range with the placard mis-positioned (Background).\n- Table 1 lists aircraft that may have had the affected valve installed at manufacture; Table 2 lists aircraft that could have had the valve installed as a replacement or from spares.\n\n(References in text: Requirement 1, Requirement 2 (parts a and b), Requirement 3, Requirement 4, Requirement 5, Note 3, Note 4, Tables 1 and 2, Background, 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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific manufacturing defect in a specific valve part number installed during a defined time period. The variation allowing owner record-checking (instead of physical inspection for some aircraft) is a procedural flexibility that stays within the original safety purpose rather than expanding it."},"complexity_factors":["Multiple applicability tables (Table 1 vs Table 2) with different compliance paths","Nested conditional logic: Requirement 2 offers two alternative inspection methods, with Requirement 3 triggering a follow-up inspection based on Requirement 2.b results","Date-based cutoffs (19 November 2007 manufacturing date, 13 May 2008 effective date) create conditional applicability","Cross-reference to FAA AD 2008-10-02 for additional context","Specific part number tracking required (P/N 2013142-18 and its predecessor numbers -9, -13, -17)","Serial number ranges must be checked against tables for applicability"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires owners/operators of certain Cessna 180/182 and Wren 460 aeroplanes fitted with valve P/N 2013142-18 (installed after 19 Nov 2007) to inspect the alternate static air source selector valve before next flight after 13 May 2008. A misplaced placard can block the valve inlet and cause altimeter, airspeed and vertical speed indicators to read falsely; if blocked, remove the label immediately. Private pilots may check their own maintenance records to comply."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-180-93-alternate-static-air-source-valve","history":"/api/acts/ad-cessna-180-93-alternate-static-air-source-valve/history","analysis":"/api/acts/ad-cessna-180-93-alternate-static-air-source-valve/analysis","conflicts":"/api/acts/ad-cessna-180-93-alternate-static-air-source-valve/conflicts","importantCases":"/api/acts/ad-cessna-180-93-alternate-static-air-source-valve/important-cases","documents":"/api/acts/ad-cessna-180-93-alternate-static-air-source-valve/documents"}}