- Effective
- August 7, 1981
- Published
- July 13, 1981
- Issued
- July 13, 1981
- Models
- AS350B, AS350C, AS350D, AS350D1
- Data sheet
- TCDSH9EU
- Registered aircraft
- 21 matched by model
- Product
- Aircraft · Rotorcraft
- Amendment
- 39-4154
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 November 21, 2025.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
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On this page
The airworthiness directive
81-15-02 SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS): Amendment 39-4154. Applies to Models AS350B, AS350C, AS350D, and AS350D-1 helicopters equipped with Air Cruisers' emergency flotation gear Model D24724 in accordance with STC SH2825SW (AS350C, AS350D, AS350D-1) or SH4032SW (AS350B), certificated in all categories (Airworthiness Docket No. 81-ASW-30).
Compliance required as indicated.
To prevent possible failure of the emergency float gear mounting brackets, P/N D16532- 2, D16625-3, and D16625-4, due to fatigue cracks, accomplish the following within the next 10 hours' time in service after the effective date of this AD, unless already accomplished.
a. Conduct a dimensional inspection of the four float mounting brackets, in accordance with Figure 1 of Aerospatiale Helicopter Corp. Service Bulletin No. SB350-13, dated May 22, 1981, to determine which part number brackets are installed.
b. If machined brackets, P/N D16532-1, D16625-1, and D16625-2 are installed, no further action is necessary.
c. If cast brackets, P/N D16532-2, D16625-3, and D16625-4, are installed, remove and replace with machined brackets, P/N D16532-1, D16625-1, and D16625-2.
d. The helicopter may be flown in accordance with FAR 21.197 to a base where the inspection can be performed.
This amendment becomes effective August 7, 1981.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 21
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1978 | 2 |
|---|---|
| 1979 | 3 |
| 1980 | 1 |
| 1982 | 2 |
| 1984 | 1 |
| 1986 | 1 |
| 1990 | 2 |
9 with no year recorded