# AD 68-05-02: Tail Rotor Drive Shaft

- Type: Airworthiness directive
- Status: Current
- Products: Brantly International 305, B-2, B-2A and B-2B
- Effective: March 30, 1968
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-572
- Registered aircraft: 55 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E79952A083469EB686256A380060BC5C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/68-05-02

## The airworthiness directive

68-05-02 BRANTLY: Amdt. 39-572. Applies to Models B-2, B-2A and B-2B series helicopters with serial numbers 4 through 482 inclusive and Brantly Model 305 helicopters with serial numbers 1002 through 1045 inclusive.

Compliance required as indicated.

To prevent failure of the tail rotor drive shaft, accomplish the following:

  (a) Within 10 hours' time in service after receipt of this Airworthiness Directive, unless already accomplished, inspect the tail rotor drive shaft for corrosion using a borescope and treat it with a corrosion preventive compound in accordance with Brantly Service Bulletin, SB No. B2B-68-2, dated February 24, 1968, or FAA-approved equivalent. After treatment, and before the tail rotor drive shaft plug is installed, reinspect the tail rotor drift shaft, using a borescope, to assure that the entire internal surface of the shaft is completely covered with the corrosion preventive compound.

  (b) If corrosion is found as a result of the inspection required by paragraph (a) of this Airworthiness Directive which cannot be removed or leaves pits visible without magnification, disregard the treatment required by paragraph (a) of this Airworthiness Directive and prior to further flight replace the tail rotor drive shaft with a replacement part which complies with Brantly Service Bulletin, SB No. B2B-68-2, dated February 24, 1968, or FAA-approved equivalent.

This amendment becomes effective March 30, 1968

## Affected data sheets (2) (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
- [TCDS H3SW](https://openairdocs.org/tcds/H3SW): Brantly International Inc.; names 1 of 1 models: 305

## 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: 55 (55 by airframe model, 0 by engine model)
- Makers: Brantly 55

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)
- [Brantly 305](https://openairdocs.org/model/brantly-305): 2 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/68-05-02/models.md
Every aircraft: https://openairdocs.org/ad/68-05-02/aircraft.md

Its text cites no advisory circulars or STCs.

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