- Effective
- April 22, 1975
- Models
- 337, 337A, 337B, 337C, 337D, 337E and 3 more
- Data sheet
- TCDSA6CE
- Registered aircraft
- 371 matched by model
- Product
- Aircraft · Small airplane
- Amendment
- 39-2177
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.
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On this page
The airworthiness directive
75-09-05 CESSNA: Amendment 39-2177. Applies to the following Model 337 series aircraft modified in accordance with Robertson Aircraft Corporation STC SA1627WE, certificated in all categories. 337-0058, 337-0063, 337-0124, 337-0205, 337-0220, 337-0291, 337-0305, 337-0327, 337-0332, 337-0443, 337-0502, 337-0540, 337-0549, 337-0566, 337-0577, 337-0685, 337-0695, 337-0726, 337-0728, 337-0732, 337-0741, 337-0817, 337-0822, 337-0836, 337-0880, 337-0882, 337-0896, 337-0916, 337-0925, 337-0929, 337-0938, 337-0942, 337-0946, 337-0947, 337-0959, 337-0963, 337-0970, 337-0977, 337-0992, 337-0996, 337-1019, 337-1036, 337-1044, 337-1052, 337-1062, 337-1072, 337-1073, 337-1079, 337-1082, 337-1091, 337-1108, 337-1118, 337-1124, 337-1139, 337-1154, 337-1159, 337-1162, 337-1175, 337-1177, 337-1180, 337-1192, 337-1210, 337-1232, 337-1258, 337-1262, 337-1274, 337-1276, 337-1303, 337-1307
Compliance required as indicated unless already accomplished.
To prevent the possibility of unreliable airspeed indications due to ice formation in the pitot system, accomplish the following:
Unless already accomplished, within the next 100 hours of operation after the effective date of this AD, rework the extended pitot tube by installation of Robertson Kit No. 14-118-100 in accordance with Robertson modification instructions No. 14-118-10 dated January 23, 1975, or later FAA approved revisions, or in a manner approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region.
The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1).
All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Robertson Aircraft Corporation, 839 West Perimeter Road, Renton, Washington 98055. The documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington.
This amendment becomes effective April 22, 1975.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 371
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1964 | 2 |
|---|---|
| 1965 | 41 |
| 1966 | 47 |
| 1967 | 24 |
| 1968 | 31 |
| 1969 | 36 |
| 1970 | 12 |
| 1971 | 10 |
| 1972 | 9 |
| 1973 | 21 |
| 1974 | 6 |
| 1975 | 16 |
| 1976 | 16 |
| 1977 | 12 |
| 1978 | 2 |
| 1979 | 2 |
| 1980 | 1 |
83 with no year recorded