AD 77-12-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 172M | Airworthiness Directives; CESSNA Models 172M, 172N, R172K, 177B, 177RG, 180J, 180K, 182P, 182Q, A185F, U206F/TU206F, U206G/TU206G, 207/T207, 207A/T207A, 210L/T210L, 337G and T337G Airplanes |
| aircraft | Cessna Aircraft Company | 172N | Airworthiness Directives; CESSNA Models 172M, 172N, R172K, 177B, 177RG, 180J, 180K, 182P, 182Q, A185F, U206F/TU206F, U206G/TU206G, 207/T207, 207A/T207A, 210L/T210L, 337G and T337G Airplanes |
| aircraft | Cessna Aircraft Company | 177B | Airworthiness Directives; CESSNA Models 172M, 172N, R172K, 177B, 177RG, 180J, 180K, 182P, 182Q, A185F, U206F/TU206F, U206G/TU206G, 207/T207, 207A/T207A, 210L/T210L, 337G and T337G Airplanes |
| aircraft | Cessna Aircraft Company | 177RG | Airworthiness Directives; CESSNA Models 172M, 172N, R172K, 177B, 177RG, 180J, 180K, 182P, 182Q, A185F, U206F/TU206F, U206G/TU206G, 207/T207, 207A/T207A, 210L/T210L, 337G and T337G Airplanes |
| aircraft | Cessna Aircraft Company | 180J | Airworthiness Directives; CESSNA Models 172M, 172N, R172K, 177B, 177RG, 180J, 180K, 182P, 182Q, A185F, U206F/TU206F, U206G/TU206G, 207/T207, 207A/T207A, 210L/T210L, 337G and T337G Airplanes |
| aircraft | Cessna Aircraft Company | 180K | Airworthiness Directives; CESSNA Models 172M, 172N, R172K, 177B, 177RG, 180J, 180K, 182P, 182Q, A185F, U206F/TU206F, U206G/TU206G, 207/T207, 207A/T207A, 210L/T210L, 337G and T337G Airplanes |
| aircraft | Cessna Aircraft Company | 182P | Airworthiness Directives; CESSNA Models 172M, 172N, R172K, 177B, 177RG, 180J, 180K, 182P, 182Q, A185F, U206F/TU206F, U206G/TU206G, 207/T207, 207A/T207A, 210L/T210L, 337G and T337G Airplanes |
| aircraft | Cessna Aircraft Company | 182Q | Airworthiness Directives; CESSNA Models 172M, 172N, R172K, 177B, 177RG, 180J, 180K, 182P, 182Q, A185F, U206F/TU206F, U206G/TU206G, 207/T207, 207A/T207A, 210L/T210L, 337G and T337G Airplanes |
| aircraft | Cessna Aircraft Company | 207 | Airworthiness Directives; CESSNA Models 172M, 172N, R172K, 177B, 177RG, 180J, 180K, 182P, 182Q, A185F, U206F/TU206F, U206G/TU206G, 207/T207, 207A/T207A, 210L/T210L, 337G and T337G Airplanes |
| aircraft | Cessna Aircraft Company | 207A | Airworthiness Directives; CESSNA Models 172M, 172N, R172K, 177B, 177RG, 180J, 180K, 182P, 182Q, A185F, U206F/TU206F, U206G/TU206G, 207/T207, 207A/T207A, 210L/T210L, 337G and T337G Airplanes |
Unsafe Condition
Unwanted propeller rotation when applying power to the external ground power receptacle.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Test the aircraft's electrical starter system by applying power to the external ground power receptacle. If the propeller rotates, modify the electrical system per Cessna Service Letters SE76-11, SE77-1, and SE77-1 (Supplement #1), or approved revisions. Record the compliance in the maintenance record.
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Compliance Time
At the next use of the external ground power receptacle, but not later than September 15, 1977
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Affected Aircraft
Cessna Models 172M, 172N, R172K, 177B, 177RG, 180J, 180K, 182P, 182Q, A185F, U206F/TU206F, U206G/TU206G, 207/T207, 207A/T207A, 210L/T210L, 337G and T337G with specific serial ranges 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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