- Model
- 47B
- Data sheet
- TCDSH-1
- Registered aircraft
- 1 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.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 20 KB | 5a71766d…a484188 | FAA DRS (API key needed) |
On this page
The airworthiness directive
47-32-14 BELL: (Was Service Note 1 of AD-1H-1.) Applies Only to Model 47B Serial Numbers 5, 6, and 10.
Inspection required at intervals not to exceed 100-hours.
In order to prevent misalignment of the tail rotor drive quill and tail rotor drive shaft and powerplant installation, due to the shifting of the engine mount assembly, caused by the insufficient clamping of the engine mount to the rubber mounts, the following action should be taken:
(1) Inspect AN 365-524 nuts on AN 5-20A bolts in the "clamp" ends of the 47-612- 111-1 engine mount assembly for bottoming of nuts. If this condition is found, proceed as outlined in steps (2), (3), and (4).
(2) Remove bolts from "clamps" and install AN 960-516 washers as required under the head of each bolt. Replace bolts in "clamps" and install nuts loosely.
(3) Check installation of engine mount assembly on rubber mounts 47-600-011-1. Front face of left mount "clamp" must be 5/32 inch aft of front face of metal case of rubber mount.
(4) Torque nuts to 100-140 inch-pounds.
(Bell Service Bulletin No. 47C10 also covers this same subject.)
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 1
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.