{"id":"F2009L00052","name":"AD/CESSNA 180/94 - Alternate Static Air Source Selector Valve Placard","slug":"ad-cessna-180-94-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":76459,"registerId":"commonwealth-F2009L00052-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 180/94 | 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 180/93 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 180/93 has been done and the aeroplane remains in compliance with that AD.

Table 1 - Aeroplanes that Could Have the Affected Part Installed

180

180K

182H

182S

180A

182

182J

182T

180B

182A

182K

F182P

180C

182B

182L

F182Q

180D

182C

182M

FR182

180E

182D

182N

R182

180F

182E

182P

T182

180G

182F

182Q

T182T

180H

182G

182R

TR182

180J

Note 1: The affected part was shipped from Cessna Parts Distribution (CPD) between 1 January 1993 and 31 March 2008.

\n```\n\n| | 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.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| 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. |\n\n| | 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| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\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 180/93 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![](image.001.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n8 January 2009","sortOrder":0},{"sectionNumber":"AD/CESSNA 180/94","sectionType":"part","heading":"AD/CESSNA 180/94","content":"## AD/CESSNA 180/94","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":5,"scope_assessment":{"changed":true,"description":"This AD expands the practical scope beyond the earlier AD/CESSNA 180/93 by capturing (a) aircraft that had P/N 2013142-18 installed as a replacement after 1 January 1993 and (b) valves shipped from Cessna Parts Distribution between 1 January 1993 and 31 March 2008. The instrument therefore broadens who must be inspected (including in-service aircraft and spare parts stock) compared with the earlier measure, unless the earlier AD’s modification/rework has already been done. In short, the AD extends inspection obligations to additional airframes and replacement parts that might not have been covered originally."},"complexity_factors":["Applicability uses multiple conditional criteria (delivery date range, presence of P/N 2013142-18, and exception if AD/CESSNA 180/93 modification/rework already done).","Long Table 1 listing many individual model variants (dozens of models) that must be checked against aircraft type and records.","Multiple distinct Requirements (1–5) with different actions (inspect, install temporary placards, remove placards, remove obstructing placards, restrict replacement part installation).","Multiple different compliance timeframes: 10 days, before further flight, within 100 hours TIS or 4 months (whichever is first), and as-of dates for part-installation restrictions.","Cross-references to earlier AD (AD/CESSNA 180/93) creating an exclusion conditional on prior compliance.","Cross-references to four different Cessna Service Bulletins for required procedures (different bulletins for single-engine, multi-engine, Caravan).","Notes about part-number lineage (P/N 2013142-18 replaced earlier P/Ns -9, -13, -17) requiring part-history checks.","Operational nuance for IFR-equipped vs non-IFR-equipped aeroplanes (different actions and timing).","Requirement to remove temporary IFR placards after inspection (creates a two-step temporary compliance path)."],"plain_english_summary":"**What this instrument does (mechanically)**\n\n- It requires owners/operators of certain Cessna 180/182 and Wren 460 series aeroplanes (listed in Table 1 of the AD) to inspect the alternate static air source selector valve (part number P/N 2013142-18) to make sure the part-number identification placard is not blocking the valve port. (Requirements 1, 2a, 3, 4, and 5.)\n- For aeroplanes equipped and authorised for IFR (instrument flight rules) operations the AD gives two paths: either inspect the valve immediately (Requirement 2a) or, if chosen, install temporary placards on the instrument panel saying “IFR OPERATION IS PROHIBITED” and “USE OF THE ALTERNATE STATIC AIR SOURCE IS PROHIBITED” (Requirement 2b). If those temporary IFR placards are fitted, operators must still inspect the valve within the longer compliance window and then remove the temporary placards after the inspection (Requirement 3).\n- If the inspection finds the part-number placard obstructing the selector valve port, the obstructing placard must be removed and discarded and the port confirmed open before further flight (Requirement 4).\n- After 10 days from the AD’s effective date, any replacement valve installed must be a P/N 2013142-18 that has already been inspected and found free from obstruction (Requirement 5).\n- The AD directs compliance with specified Cessna Service Bulletins for the inspection and removal procedures.\n\n**Who this affects**\n\n- Owners, operators and maintenance organisations responsible for the Cessna 180 and 182 model variants and the Wren 460 series listed in Table 1. The AD applies to aeroplanes that were delivered from the manufacturer between 1 January 1993 and 31 March 2008 (unless they have already had the modification/rework required by the earlier AD/CESSNA 180/93 and remain in compliance with it), and to aeroplanes that had P/N 2013142-18 fitted as a replacement after 1 January 1993 (again unless they comply with AD/CESSNA 180/93). The AD also captures replacement parts shipped by Cessna Parts Distribution in the same date range (Note 1, Applicability and Note 2).\n\n**Why it matters (claimed safety rationale)**\n\n- The regulator records that some P/N 2013142-18 valves were shipped with the P/N identification placard incorrectly installed such that it can obstruct the alternate static air source selector valve port. If the valve port is obstructed, the altimeter, airspeed indicator and vertical speed indicator may show erroneous values. That could lead a pilot to act on incorrect flight information with a risk of loss of control. The AD therefore imposes inspection and corrective actions intended to eliminate that hazard.\n\n**What the AD requires in practice (costs, who pays, who decides, behaviour changes)**\n\n- Who pays: aircraft owners/operators pay for the inspections, removal of obstructing placards, any time for grounding the aircraft, and for ensuring replacement valves are inspected before installation. Maintenance organisations will carry out the work and record compliance.\n- Who decides: the operator chooses between the immediate temporary-placard option (Requirement 2b) or immediate inspection for IFR-equipped aeroplanes (Requirement 2a). After that, compliance is mandatory in the timeframes set by the AD and recorded as required by the aviation safety regulator.\n- Behavioural change: operators must inspect existing valves and ensure replacement valves are inspected before installation. IFR operations may be temporarily restricted if an operator chooses the placard option until the inspection is completed and the placards are removed.\n\n**Implementation details, trade-offs and compliance burden**\n\n- The AD contains multiple, different compliance windows: 10 days for some IFR-related actions, ‘‘before further flight’’ for others, and a longer window of 100 flight hours time-in-service (TIS) or 4 months (whichever is first) for routine inspections (Compliance section). These differing time limits create scheduling complexity for operators and maintenance providers.\n- The AD cross-references an earlier AD (AD/CESSNA 180/93) as an exclusion: aeroplanes already modified/reworked under that AD are outside this requirement. That requires operators to check maintenance history carefully to determine applicability.\n- The AD instructs use of specific Cessna Service Bulletins for the required procedures. Following those published procedures reduces ambiguity but creates dependence on manufacturer documents.\n- There is a short-term operational trade-off available to IFR operators: fit temporary flight-prohibiting placards and continue other operations while awaiting the inspection, but those placards must be removed after the inspection if the valve is found clear.\n- Replacement parts management: the AD effectively requires inspection of both installed valves and parts stock (spares) before installation (Requirement 5 and Note 1). This increases parts-handling steps for maintenance providers and may slow repairs if inspected, cleared parts are not readily available.\n\n**Risks and likely practical effects**\n\n- Concentrated costs: individual owners of affected aircraft and maintenance organisations bear inspection and rectification costs. The supplier (Cessna Parts Distribution) is indicated as the source of the possibly affected valves shipped during a defined period; however, the AD imposes inspection obligations on aircraft operators rather than mandating a supplier recall.\n- Diffuse benefit: safety gains (correct instrument indications) are spread across the flying public and regulators.\n- Implementation risk: misidentification of valve part numbers or misunderstanding of applicability (especially where AD/CESSNA 180/93 may already have been complied with) could lead to non-compliance or unnecessary work. The AD reduces this risk by listing affected models and giving precise part numbers and dates, but the list is long and requires record checks (Table 1, Applicability).\n- Substitution effects: operators might avoid using the alternate static source in IFR operations if there is any uncertainty, or delay component replacement pending inspection.\n\n**Source claim vs practical effect**\n\n- The source (regulator) asserts that the placard obstruction can cause erroneous instrument readings and thereby create a safety risk. The AD addresses that specific mechanical failure mode by inspection and removal of obstructing placards, and by preventing uninspected replacement valves being fitted. The AD’s measures are narrowly targeted at that mechanical cause rather than imposing broader system changes.\n\n"},"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 focused on a specific defective part (P/N 2013142-18 alternate static air source selector valve) on specific Cessna aircraft models. While it references a prior AD (AD/CESSNA 180/93) and expands coverage to additional aircraft discovered to have the problem, this represents a refinement of the original safety scope rather than scope creep. The directive remains tightly focused on the single safety issue of placard obstruction of static air ports."},"complexity_factors":["Multiple conditional applicability criteria (manufacture date ranges, replacement part installation dates, prior AD compliance exceptions)","Different requirements based on aircraft equipment type (IFR vs non-IFR)","Tiered compliance deadlines (10 days, 100 hours/4 months, before further flight)","Cross-reference to prior AD (AD/CESSNA 180/93) for exemption determination","Multiple alternative service bulletins referenced for procedures (4 different Cessna documents)","Nested requirements: Requirement 3 applies only if Requirement 2b was used, creating conditional logic","Specific part number tracking (P/N 2013142-18) and its replacement history (replaced P/Ns 2013142-9, -13, -17)","Reference to corresponding FAA AD (2008-26-10) for additional context"],"plain_english_summary":"This AD requires owners/operators of specified Cessna 180/182 and Wren 460 series aeroplanes to inspect (and, if needed, remove) the alternate static air source selector valve because a part-number placard can block a small port and cause false altimeter/airspeed/vertical-speed indications. It targets aircraft delivered 1993–2008 or fitted with the replacement valve (p/n 2013142‑18), sets short compliance windows (stricter for IFR aircraft), and bars installing unchecked replacement valves to prevent instrument errors that could lead to loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-180-94-alternate-static-air-source-selector-valve-placard","history":"/api/acts/ad-cessna-180-94-alternate-static-air-source-selector-valve-placard/history","analysis":"/api/acts/ad-cessna-180-94-alternate-static-air-source-selector-valve-placard/analysis","conflicts":"/api/acts/ad-cessna-180-94-alternate-static-air-source-selector-valve-placard/conflicts","importantCases":"/api/acts/ad-cessna-180-94-alternate-static-air-source-selector-valve-placard/important-cases","documents":"/api/acts/ad-cessna-180-94-alternate-static-air-source-selector-valve-placard/documents"}}