- Effective
- March 7, 1964
- Model
- 107-II
- Data sheet
- TCDS1H16
- Registered aircraft
- 12 matched by model
- Product
- Aircraft · Rotorcraft
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
64-06-07 VERTOL: Amdt. 697 Part 507 Federal Register March 7, 1964. Applies to All Model 107-II Helicopters.
Compliance required within 25 hours' time in service after the effective date of this AD.
To prevent recurrence of a serious lurching condition which has been encountered on this model helicopter, modify each stability augmentation system to derive a.c. power from its respective generator instead of the essential bus, as follows:
Remove the present a.c. electrical circuit wiring from terminals A3 and B3 of the a.c. instrument relay and from the "B" phase of the a.c. bus. Connect terminals A3 and B3 of the instrument relay to the terminal T2 of the a.c. feeder relay No. 1 and a.c. feeder relay No. 2 respectively.
(Vertol 107-II Service Bulletin No. 107-118 dated December 6, 1963, covers the same subject.) This directive effective March 7, 1964.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 12
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1962 | 5 |
|---|---|
| 1963 | 1 |
| 1964 | 3 |
| 1965 | 1 |
2 with no year recorded