# AD 65-28-01: Tail Rotor Blades

- Type: Airworthiness directive
- Status: Current
- Products: Brantly International B-2, B-2A and B-2B
- Effective: December 14, 1965
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-168
- Registered aircraft: 53 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0D0B235E518614D986256A3800609FEE.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/65-28-01

## The airworthiness directive

65-28-01 BRANTLY: Amdt. 39-168 Part 39 Federal Register December 14, 1965. Applies to Model B-2 Series Helicopters, Serial Number 454 and Below, Equipped with Tail Rotor Blades Assembly, P/N B2-111-11.

Compliance required as indicated, unless already accomplished.

To prevent further failures of the tail rotor blade grip at the outboard thrust bearing shoulder, accomplish the following:

  (a) For helicopters with tail rotor blades assembly, P/N B2-111-11, with less than 100 hours' time in service on the effective date of this AD, comply with (c) through (g) before the accumulation of 125 hours' time in service.

  (b) For helicopters with tail rotor blades assembly, P/N B2-111-11, with 100 or more hours' time in service on the effective date of this AD, comply with (c) through (g) within the next 25 hours' time in service.

  (c) Remove and disassemble tail rotor blades assembly, P/N B2-111-11, from hub and thrust bearings in accordance with Brantly Model B2B Maintenance Manual.

  (d) Using letter sealing wax or any other hard-setting, low-temperature-melting (250 degrees F. or less) material, make an impression of the thrust bearing shoulder relief radius in the grip at Blade Station 3.06, and inspect for a radius less than 0.020 inch.

  (e) Using at least a two-power magnifying glass, inspect for sharp corner circumferential tool marks deeper than 0.010 inch.

  (f) Remove from service any tail rotor blade with tool marks deeper than 0.010 inch or relief radius less than 0.020 inch before further flight.

  (g) Reinstall any tail rotor blade with tool marks not deeper than 0.010 inch or relief radius not less than 0.020 inch in accordance with Brantly Model B2B Maintenance Manual.

This directive effective December 14, 1965

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 2H2](https://openairdocs.org/tcds/2H2): Brantly International Inc.; names 3 of 3 models: B-2B, B-2A, B-2

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 53 (53 by airframe model, 0 by engine model)
- Makers: Brantly 53

Models with the most aircraft:

- [Brantly B-2B](https://openairdocs.org/model/brantly-b-2b): 34 aircraft (airframe model)
- [Brantly B-2](https://openairdocs.org/model/brantly-b-2): 17 aircraft (airframe model)
- [Brantly B-2A](https://openairdocs.org/model/brantly-b-2a): 2 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/65-28-01/models.md
Every aircraft: https://openairdocs.org/ad/65-28-01/aircraft.md

Its text cites no advisory circulars or STCs.

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