AD 77-02-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 150 | Airworthiness Directives; CESSNA Models 150, A150, 172, R172, 182, 206 and 207 Airplanes |
| aircraft | Cessna Aircraft Company | 150A | Airworthiness Directives; CESSNA Models 150, A150, 172, R172, 182, 206 and 207 Airplanes |
| aircraft | Cessna Aircraft Company | 150B | Airworthiness Directives; CESSNA Models 150, A150, 172, R172, 182, 206 and 207 Airplanes |
| aircraft | Cessna Aircraft Company | 150C | Airworthiness Directives; CESSNA Models 150, A150, 172, R172, 182, 206 and 207 Airplanes |
| aircraft | Cessna Aircraft Company | 150D | Airworthiness Directives; CESSNA Models 150, A150, 172, R172, 182, 206 and 207 Airplanes |
| aircraft | Cessna Aircraft Company | 150E | Airworthiness Directives; CESSNA Models 150, A150, 172, R172, 182, 206 and 207 Airplanes |
| aircraft | Cessna Aircraft Company | 150F | Airworthiness Directives; CESSNA Models 150, A150, 172, R172, 182, 206 and 207 Airplanes |
| aircraft | Cessna Aircraft Company | 150G | Airworthiness Directives; CESSNA Models 150, A150, 172, R172, 182, 206 and 207 Airplanes |
| aircraft | Cessna Aircraft Company | 150H | Airworthiness Directives; CESSNA Models 150, A150, 172, R172, 182, 206 and 207 Airplanes |
| aircraft | Cessna Aircraft Company | 150J | Airworthiness Directives; CESSNA Models 150, A150, 172, R172, 182, 206 and 207 Airplanes |
Unsafe Condition
The wing flap actuator ball nut assembly may fail due to insufficient strength, leading to flap malfunction or failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the wing flap actuator for date code stamps OH, HH, WH, or ZH. If found, install a 'FLAP EXTENSION PROHIBITED' placard. Within 50 hours' time in service after February 3, 1977, replace the ball nut assembly per Cessna Service Letter SE76-25. If the date code is not listed, document compliance in maintenance records.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before the next flight and within 50 hours' time in service after February 3, 1977
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Cessna Models 150, A150, 172, R172, 182, 206, and 207 with specified serial numbers as listed in the AD.
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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