- Effective
- September 5, 1968
- Model
- 177
- Data sheet
- TCDSA13CE
- Registered aircraft
- 446 matched by model
- Product
- Aircraft · Small airplane
- Amendment
- 39-647
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 19 KB | 3a696bec…1a1ff17 | FAA DRS (API key needed) |
On this page
The airworthiness directive
68-18-02 CESSNA: Amendment 39-647. Applies to Model 177, Serial Numbers 661, and 17700001 and 17700003 through 17701164 airplanes.
Compliance: Required within the next 10 hours' time-in-service after the effective date of this airworthiness directive, unless already accomplished.
To prevent failure of the oil pressure gauge line between the engine crankcase and aircraft firewall, accomplish the following:
(A) Replace the copper oil pressure gauge line assembly between the engine crankcase and aircraft firewall with a flexible hose assembly in accordance with Cessna Service Letter No. SE68-14, Supplement No. 1, dated August 23, 1968, or any equivalent modification approved by the Chief, Engineering and Manufacturing Branch, Central Region.
This amendment becomes effective September 5, 1968.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 446
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1967 | 204 |
|---|---|
| 1968 | 171 |
71 with no year recorded