Cessna 150 and 152 Brackett Air Filters: Assembly and Gasket Evidence
Brackett air-filter research on a Cessna 150 or 152 starts with the installed filter assembly, not the aircraft name. The retained records identify separate assembly and gasket concerns associated with AD 81-15-03 and AD 96-09-06. A model listed as a possible installation is not evidence that the affected filter or gasket is present.
Assembly identity comes before applicability
The assembly record refers to specified Brackett filter assemblies and STC installations. The gasket record includes affected assemblies such as BA-4106 and describes an inspection or improved-design replacement context. Their shared manufacturer name does not make the two issues identical.
| Reference family | Issue ID | Category | Title | Failure Mode | Affected Scope | Applicability Class | Severity | Operational Consequence | Detection / Prebuy Clues | Maintenance / Mitigation | Legal / OEM Status | Primary Source Ref | Reference | Prebuy Priority | Confidence | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cessna 150 | KI-048 | Induction / Filter | Brackett air-filter assembly configuration | Specified Brackett filter assemblies/STCs require corrective action. | Aircraft with listed Brackett filter assemblies/STCs; 150 variants among listed installations. | APPLIANCE / STC | HIGH | Induction restriction/filter failure and engine power consequence. | Identify filter assembly/STC/P/N and AD compliance. | Comply with AD 81-15-03. | FAA AD - mandatory conditional | AD 81-15-03 | [1] | HIGH | HIGH | Do not infer from aircraft model. |
| Cessna 150 | KI-058 | Induction / Filter | Brackett air-filter gasket defect | Specified Brackett filter assemblies including BA-4106 require recurring inspection until improved gasket/assembly replacement. | 150/152-family aircraft only when affected Brackett filter assembly is installed. | APPLIANCE / CONFIGURATION | HIGH | Induction filter/gasket failure and engine air-flow consequence. | Identify exact filter assembly and AD compliance/replacement status. | Inspect each 100 h until improved-design replacement, no later than AD limit. | FAA AD - mandatory conditional | AD 96-09-06 | [2] | HIGH | HIGH | Supersedes earlier Brackett gasket lineage. |
| Cessna 152 | KI-058 | Induction / Filter | Brackett air-filter gasket defect | Specified Brackett filter assemblies including BA-4106 require recurring inspection until improved gasket/assembly replacement. | 150/152-family aircraft only when affected Brackett filter assembly is installed. | APPLIANCE / CONFIGURATION | HIGH | Induction filter/gasket failure and engine air-flow consequence. | Identify exact filter assembly and AD compliance/replacement status. | Inspect each 100 h until improved-design replacement, no later than AD limit. | FAA AD - mandatory conditional | AD 96-09-06 | [2] | HIGH | HIGH | Supersedes earlier Brackett gasket lineage. |
Identify the assembly and available installation paperwork before interpreting a maintenance entry. An entry describing replacement of filter material may answer a different question from one identifying a complete assembly or improved gasket. The source summaries do not establish that any generic replacement element constitutes the corrective action referenced by an AD.
Two records need two explanations
When an aircraft's logs cite both directives, keep the actions and evidence attached to their respective references. A statement that one was addressed should not silently be applied to the other. Conversely, do not infer two independent physical defects merely because two AD numbers appear in a record: the actual equipment and the work performed need to be understood.
The gasket summary records recurring inspection until the specified replacement context. This page does not calculate a next-due time or reproduce a full compliance schedule. Those depend on the controlling text, the installed configuration and the aircraft's maintenance evidence. The AD hub provides the wider applicability guide.
The induction installation may have changed
An engine conversion or other induction-system alteration can change which components belong in the installation. The conversion reference is relevant when the aircraft no longer matches the factory engine and intake arrangement. Do not carry a factory-model assumption into a modified installation without checking its approval and equipment details.
A useful inspection file includes assembly identification, replacement history, the references cited for any corrective action and any later alteration affecting that installation. This makes it easier to distinguish an unresolved equipment identity from an undocumented action or a question about present condition.
What the evidence cannot tell a buyer
The source records do not establish current filter availability, replacement prices or the condition of a particular aircraft's induction system. They also do not make a comparative product recommendation. Their value is more specific: they show why manufacturer, assembly, gasket configuration and installation history must be connected. An aircraft can have a recent engine entry while its filter history remains unclear, so engine hours alone are an inadequate answer to this component-level question.