AD 68-17-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 150 | Airworthiness Directives; CESSNA Model 150, 172, 177, 180, 185, F150, and F172H Airplanes |
| aircraft | Cessna Aircraft Company | 150A | Airworthiness Directives; CESSNA Model 150, 172, 177, 180, 185, F150, and F172H Airplanes |
| aircraft | Cessna Aircraft Company | 150B | Airworthiness Directives; CESSNA Model 150, 172, 177, 180, 185, F150, and F172H Airplanes |
| aircraft | Cessna Aircraft Company | 150C | Airworthiness Directives; CESSNA Model 150, 172, 177, 180, 185, F150, and F172H Airplanes |
| aircraft | Cessna Aircraft Company | 150D | Airworthiness Directives; CESSNA Model 150, 172, 177, 180, 185, F150, and F172H Airplanes |
| aircraft | Cessna Aircraft Company | 150E | Airworthiness Directives; CESSNA Model 150, 172, 177, 180, 185, F150, and F172H Airplanes |
| aircraft | Cessna Aircraft Company | 150F | Airworthiness Directives; CESSNA Model 150, 172, 177, 180, 185, F150, and F172H Airplanes |
| aircraft | Cessna Aircraft Company | 150G | Airworthiness Directives; CESSNA Model 150, 172, 177, 180, 185, F150, and F172H Airplanes |
| aircraft | Cessna Aircraft Company | 150H | Airworthiness Directives; CESSNA Model 150, 172, 177, 180, 185, F150, and F172H Airplanes |
| aircraft | Cessna Aircraft Company | 150J | Airworthiness Directives; CESSNA Model 150, 172, 177, 180, 185, F150, and F172H Airplanes |
Unsafe Condition
Failure of the pneumatic stall warning system to provide a clearly audible warning during stall conditions due to improper operation or blockage of the reed assembly and horn bell.
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Required Actions
Test the pneumatic stall warning system preflight by covering the wing opening with a cloth and applying suction. Install a placard on the instrument panel within 10 hours time in service after the effective date. Repair non-functioning systems by replacing the reed assembly with Part Number 0413483-2, installing mesh screens over the horn bell and wing opening, or using approved modifications. Recalibrate if necessary.
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Compliance Time
within 10 hours time in service after the effective date of this Airworthiness Directive
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Affected Aircraft
Cessna Models 150 (Serial Numbers 15061533 through 15069308), 172 (17254893 through 17257161), 177 (17700001 through 17701164), 180 (18051824 through 18051977), 185 (185-1198 through 185-1429), F150 (F150-0001 and up), F172H (F172-0320 and up), and Reims Rocket (FR172-0001 and up) with pneumatic stall warning system Part Number 0413029-200, or where this system was installed as a replacement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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