- Effective
- September 15, 1970
- Model
- 1100
- Data sheet
- TCDSH2WE
- Product
- Aircraft · Rotorcraft
- Amendment
- 39-1075
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 | d2572006…ca26e89 | FAA DRS (API key needed) |
On this page
The airworthiness directive
70-18-04 FAIRCHILD HILLER HELICOPTERS: Amdt. 39-1075. Applies to 1100 series helicopters certificated in all categories.
Compliance required within the next 25 flight hours of the effective date of this A/D unless already accomplished.
To prevent failure of transmission vertical struts and mounts:
(1) Strip epoxy paint from weld areas of transmission vertical struts and mounts P/N 24-28030-1 and -2 with commercial paint stripper.
(2) With dye penetrant inspect weld areas for cracks.
(3) Replace any cracked part prior to further flight.
(4) Refinish stripped areas with two coats of zinc chromate.
(5) Repeat above procedure at each succeeding 100 flight hours.
This amendment is effective September 15, 1970.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.